TWI814163B - rotating electrical machine - Google Patents
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- TWI814163B TWI814163B TW110145401A TW110145401A TWI814163B TW I814163 B TWI814163 B TW I814163B TW 110145401 A TW110145401 A TW 110145401A TW 110145401 A TW110145401 A TW 110145401A TW I814163 B TWI814163 B TW I814163B
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- 230000004907 flux Effects 0.000 claims abstract description 352
- 230000000903 blocking effect Effects 0.000 claims abstract description 261
- 238000004804 winding Methods 0.000 claims description 7
- 230000004888 barrier function Effects 0.000 claims description 4
- 230000004308 accommodation Effects 0.000 description 25
- 230000002093 peripheral effect Effects 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 238000004088 simulation Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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- Permanent Magnet Type Synchronous Machine (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
一種旋轉電機，其一個樣態包括具有多個磁鐵的轉子。多個磁鐵包含：一對第一磁鐵，在沿軸向觀察時，該一對第一磁鐵沿著隨著從徑向內側朝向徑向外側而彼此在周向上遠離的方向延伸；以及第二磁鐵，其配置於一對第一磁鐵彼此之間的周向位置，在沿軸向觀察時，該第二磁鐵沿與徑向垂直的方向延伸。轉子鐵芯具有：一對第一磁通阻隔部，隔著第一磁鐵而配置；一對第二磁通阻隔部，隔著第二磁鐵而配置；以及第三磁通阻隔部，其配置於一對第一磁通阻隔部中的位於徑向外側的第一磁通阻隔部與第二磁通阻隔部的周向之間。在第二磁鐵的周向中心配置於與某一個齒的周向中心相同的周向位置的某個狀態下，第三磁通阻隔部位於另一個齒的徑向內側。A rotating electrical machine, one aspect of which includes a rotor having a plurality of magnets. The plurality of magnets include: a pair of first magnets extending in a direction circumferentially away from each other as viewed from the radially inner side toward the radially outer side; and a second magnet. , which is arranged at a circumferential position between a pair of first magnets. When viewed in the axial direction, the second magnet extends in a direction perpendicular to the radial direction. The rotor core has: a pair of first magnetic flux blocking parts arranged across the first magnet; a pair of second magnetic flux blocking parts arranged across the second magnet; and a third magnetic flux blocking part arranged on The first magnetic flux blocking portion of the pair of first magnetic flux blocking portions is located between the first magnetic flux blocking portion and the second magnetic flux blocking portion located on the radial outer side in the circumferential direction. In a state where the circumferential center of the second magnet is arranged at the same circumferential position as the circumferential center of one of the teeth, the third magnetic flux blocking portion is located radially inward of the other tooth.
Description
本發明是有關於一種旋轉電機。 The present invention relates to a rotating electrical machine.
已知具備轉子鐵芯和配置於設置於轉子鐵芯的孔的永久磁鐵的旋轉電機。例如，專利文獻1記載了三個永久磁鐵配置為▽形狀的旋轉電機。在上述那樣的旋轉電機中，要求扭矩波動的進一步降低。 A rotating electrical machine including a rotor core and a permanent magnet arranged in a hole provided in the rotor core is known. For example, Patent Document 1 describes a rotating electrical machine in which three permanent magnets are arranged in a ▽ shape. In the above-mentioned rotating electrical machine, further reduction of torque ripple is required.
專利文獻1：國際公開第2018/159181號 Patent Document 1: International Publication No. 2018/159181
本發明鑒於上述情況，其目的之一在於提供具有能夠降低扭矩波動的結構的旋轉電機。 In view of the above circumstances, one of the objects of the present invention is to provide a rotating electrical machine having a structure capable of reducing torque ripple.
本發明的旋轉電機的一個方式具備：轉子，其能夠以中心軸線為中心旋轉；以及定子，其位於所述轉子的徑向外側。所述轉子具有：轉子鐵芯，其具有多個收納孔；以及多個磁鐵，分別收納於所述多個收納孔的內部。所述定子具有：定子鐵芯，其具有包圍所述轉子鐵芯的環狀的鐵芯背部和從所述鐵芯背部向徑向內側延伸並且沿周向隔開間隔地排列配置的多個齒；以及多個線圈，它們安裝於所述定子鐵芯。所述多個磁鐵包含：一對第一磁鐵，它們沿周向彼此隔開間隔地配置，在沿軸向觀察時，該一 對第一磁鐵沿著隨著從徑向內側朝向徑向外側而彼此在周向上遠離的方向延伸；以及第二磁鐵，其在比所述一對第一磁鐵的徑向內端部靠徑向外側的位置配置於所述一對第一磁鐵彼此之間的周向位置，在沿軸向觀察時，該第二磁鐵沿著與徑向垂直的方向延伸。所述轉子鐵芯具有：第一磁通阻隔部，在沿軸向觀察時，在各所述第一磁鐵所延伸的方向上分別隔著各所述第一磁鐵而各配置有一對該第一磁通阻隔部；一對第二磁通阻隔部，在沿軸向觀察時在所述第二磁鐵所延伸的方向上隔著所述第二磁鐵而配置；以及第三磁通阻隔部，其配置於隔著所述一對第一磁鐵的一個而配置的一對所述第一磁通阻隔部中的位於徑向外側的第一磁通阻隔部與所述一對第二磁通阻隔部中的一個的周向之間和隔著所述一對第一磁鐵的另一個而配置的一對所述第一磁通阻隔部中的位於徑向外側的第一磁通阻隔部與所述一對第二磁通阻隔部中的另一個的周向之間中的至少一方。在所述第二磁鐵的周向中心配置於與某一個所述齒的周向中心相同的周向位置的某個狀態下，所述第三磁通阻隔部位於另一個所述齒的徑向內側。 One embodiment of the rotating electrical machine of the present invention includes: a rotor rotatable about a central axis; and a stator located radially outside the rotor. The rotor has: a rotor core having a plurality of receiving holes; and a plurality of magnets respectively received in the plurality of receiving holes. The stator has a stator core having an annular core back surrounding the rotor core and a plurality of teeth extending radially inward from the core back and arranged at intervals in the circumferential direction. ; And a plurality of coils, which are installed on the stator core. The plurality of magnets include: a pair of first magnets, which are spaced apart from each other in the circumferential direction. When viewed in the axial direction, the first magnets are a pair of first magnets extending in a direction circumferentially away from each other from the radially inner side toward the radially outer side; and a second magnet that is radially closer than the radially inner ends of the pair of first magnets. The outer position is arranged at a circumferential position between the pair of first magnets. When viewed in the axial direction, the second magnet extends in a direction perpendicular to the radial direction. The rotor core has a first magnetic flux blocking portion, and when viewed in the axial direction, a pair of first magnets are respectively arranged across the first magnets in the direction in which the first magnets extend. a magnetic flux blocking part; a pair of second magnetic flux blocking parts arranged across the second magnet in the direction in which the second magnet extends when viewed in the axial direction; and a third magnetic flux blocking part, The first magnetic flux blocking portion and the pair of second magnetic flux blocking portions located on the radially outer side of the pair of first magnetic flux blocking portions arranged across one of the pair of first magnets Between one of the first magnets in the circumferential direction and the first magnetic flux blocking portion of the pair of first magnetic flux blocking portions arranged across the other of the pair of first magnets, the first magnetic flux blocking portion located on the radially outer side and the pair of first magnetic flux blocking portions At least one of the circumferential directions of the other of the second magnetic flux blocking portions. In a state where the circumferential center of the second magnet is arranged at the same circumferential position as the circumferential center of one of the teeth, the third magnetic flux blocking portion is located in the radial direction of the other tooth. inside.
根據本發明的一個樣態，可在旋轉電機中降低扭矩波動。 According to one aspect of the present invention, torque ripple can be reduced in a rotating electrical machine.
1:旋轉電機 1: Rotating motor
2:外殼 2: Shell
4:軸承保持架 4: Bearing cage
5a、5b:軸承 5a, 5b: Bearings
10:轉子 10:Rotor
11:軸 11:Axis
20:轉子鐵芯 20:Rotor core
21:貫通孔 21:Through hole
22a、22b:凹部 22a, 22b: concave part
30:收納孔 30: Storage hole
31a、31b:第一收納孔 31a, 31b: first storage hole
31c:第一收納孔31a的第一直線部 31c: the first linear portion of the first storage hole 31a
31d:第一收納孔31a的內端部 31d: The inner end of the first storage hole 31a
31e:第一收納孔31a的外端部 31e: The outer end of the first storage hole 31a
31f:第一收納孔31b的第一直線部 31f: the first linear portion of the first storage hole 31b
31g:第一收納孔31b的內端部 31g: The inner end of the first storage hole 31b
31h:第一收納孔31b的外端部 31h: The outer end of the first storage hole 31b
32:第二收納孔 32:Second storage hole
32a:第二收納孔32的第二直線部 32a: The second straight portion of the second storage hole 32
32b、32c:第二收納孔32的端部 32b, 32c: ends of the second storage hole 32
40:磁鐵 40:Magnet
41a、41b:第一磁鐵 41a, 41b: first magnet
42:第二磁鐵 42:Second magnet
51a、51b、51c、51d:第一磁通阻隔部 51a, 51b, 51c, 51d: first magnetic flux blocking part
52a、52b:第二磁通阻隔部 52a, 52b: Second magnetic flux blocking part
53a、53b:第三磁通阻隔部 53a, 53b: The third magnetic flux blocking part
60:定子 60:Stator
61:定子鐵芯 61:Stator core
62:鐵芯背部 62: Iron core back
63、66A、66B、66C、66D、66E、66F:齒 63, 66A, 66B, 66C, 66D, 66E, 66F: teeth
63a:齒的基部 63a: Base of tooth
63b:齒的傘部 63b: The umbrella part of the tooth
64:絕緣件 64:Insulation parts
65:線圈 65: coil
70、70N、70S:磁極部 70, 70N, 70S: Magnetic pole part
B24、B48、B48a、B48b、B48c:磁通 B24, B48, B48a, B48b, B48c: magnetic flux
IL1:磁極中心線 IL1: Magnetic pole center line
IL2、IL4:齒中心線 IL2, IL4: tooth center line
IL3、IL5:假想線 IL3, IL5: imaginary line
IL6、IL7:假想曲線 IL6, IL7: imaginary curve
J:中心軸線 J: central axis
L1、L2、L3:距離 L1, L2, L3: distance
N、S:磁極 N, S: magnetic pole
r:轉子鐵芯的半徑 r: radius of the rotor core
TR:扭矩波動比 TR: Torque ripple ratio
TR1:實線(示出實施例1的結果) TR1: solid line (shows the results of Example 1)
TR2:虛線(示出實施例2的結果) TR2: dashed line (shows the results of Example 2)
TR3:點虛線(示出實施例3的結果) TR3: dotted line (shows the results of Example 3)
TR4:雙點虛線(示出實施例4的結果) TR4: double dotted line (shows the results of Example 4)
W:第三磁通阻隔部53a、53b的周向的尺寸 W: Circumferential size of the third magnetic flux blocking portions 53a and 53b
θ:周向 θ : circumferential direction
II-II:剖面線 II-II: Section line
圖1是示出本發明的一實施方式的旋轉電機的剖視圖。 FIG. 1 is a cross-sectional view showing a rotating electrical machine according to an embodiment of the present invention.
圖2是示出本實施方式的旋轉電機的一部分的剖視圖，是沿 圖1中的II-II線的剖視圖。 FIG. 2 is a cross-sectional view showing a part of the rotating electric machine according to the present embodiment, taken along A cross-sectional view along line II-II in Figure 1.
圖3是示出本實施方式的轉子的磁極部和定子鐵芯的一部分的剖視圖。 3 is a cross-sectional view showing a part of the magnetic pole portion of the rotor and the stator core according to this embodiment.
圖4是示出本實施方式的在轉子與定子之間流動的磁通的48次分量的一例的圖。 FIG. 4 is a diagram showing an example of the 48th order component of the magnetic flux flowing between the rotor and the stator in this embodiment.
圖5是示出本實施方式的在轉子與定子之間流動的磁通的24次分量的一例的圖。 FIG. 5 is a diagram showing an example of the 24th order component of the magnetic flux flowing between the rotor and the stator in this embodiment.
圖6是示出本發明的實施例的模擬結果的曲線圖。 FIG. 6 is a graph showing simulation results of the embodiment of the present invention.
在各圖中適當地示出的Z軸方向是將正側作為「上側」、負側作為「下側」的上下方向。各圖中適當地示出的中心軸線J是與Z軸方向平行並沿上下方向延伸的假想線。在以下說明中，將中心軸線J的軸向即與上下方向平行的方向簡稱「軸向」、以中心軸線J為中心的徑向簡稱「徑向」、以中心軸線J為中心的周向簡稱「周向」。在各圖中適當地示出的箭頭θ表示周向。箭頭θ是在從上側觀察時以中心軸線J為中心朝向順時針的方向。在以下的說明中，將以某個物件為基準時周向中的箭頭θ所朝向的一側，即在從上側觀察時順時針前進的一側稱為「周向一側」，將以某個物件為基準時周向中的箭頭θ所朝向的一側的相反側，即在從上側觀察時逆時針前進的一側稱為「周向另一側」。 The Z-axis direction appropriately shown in each figure is an up-down direction with the positive side being the "upper side" and the negative side being the "lower side". The central axis J shown appropriately in each figure is a virtual line parallel to the Z-axis direction and extending in the up-down direction. In the following description, the axial direction of the central axis J, that is, the direction parallel to the up-down direction, will be referred to as the "axial direction", the radial direction centered on the central axis J will be referred to as the "radial direction", and the circumferential direction centered on the central axis J will be referred to as the "radial direction". "Circumferential". The arrow θ shown appropriately in each figure indicates the circumferential direction. The arrow θ points in a clockwise direction with the central axis J as the center when viewed from the upper side. In the following explanation, the side toward which the arrow θ in the circumferential direction faces when a certain object is used as a reference, that is, the side that advances clockwise when viewed from above, is called the "circumferential side." The side opposite to the side toward which the arrow θ in the circumferential direction points at the reference time, that is, the side that advances counterclockwise when viewed from above, is called the "other side in the circumferential direction".
另外，上下方向、上側以及下側僅是用於對各部分的配 置關係等進行說明的名稱，實際的配置關係等也可以是這些名稱所示的配置關係等以外的配置關係等。 In addition, the up and down directions, upper side and lower side are only used for the arrangement of each part. The actual configuration relationship may be a configuration relationship other than the configuration relationship indicated by these names.
如圖1所示，本實施方式的旋轉電機1是內轉子型的旋轉電機。在本實施方式中，旋轉電機1是三相交流式的旋轉電機。旋轉電機1例如是被供給三相交流電源而被驅動的三相馬達，其包括外殼2、轉子10、定子60、軸承保持架4以及軸承5a、5b。 As shown in FIG. 1 , the rotating electrical machine 1 of this embodiment is an inner-rotor type rotating electrical machine. In the present embodiment, the rotating electrical machine 1 is a three-phase AC rotating electrical machine. The rotating electric machine 1 is, for example, a three-phase motor driven by being supplied with a three-phase AC power supply, and includes a housing 2, a rotor 10, a stator 60, a bearing holder 4, and bearings 5a and 5b.
外殼2在內部收納轉子10、定子60、軸承保持架4以及軸承5a、5b。外殼2的底部保持軸承5b。軸承保持架4保持軸承5a。軸承5a、5b例如是球軸承。 The casing 2 accommodates the rotor 10, the stator 60, the bearing holder 4, and the bearings 5a and 5b inside. The bottom of the housing 2 holds the bearing 5b. The bearing holder 4 holds the bearing 5a. The bearings 5a and 5b are, for example, ball bearings.
定子60位於轉子10的徑向外側。定子60具有定子鐵芯61、絕緣件64以及多個線圈65。定子鐵芯61具有鐵芯背部62和多個齒63。鐵芯背部62位於後述的轉子鐵芯20的徑向外側。如圖2所示，鐵芯背部62是包圍轉子鐵芯20的環狀。鐵芯背部62例如是以中心軸線J為中心的圓環狀。 The stator 60 is located radially outside the rotor 10 . The stator 60 includes a stator core 61 , an insulator 64 and a plurality of coils 65 . The stator core 61 has a core back 62 and a plurality of teeth 63 . The core back portion 62 is located radially outward of the rotor core 20 described below. As shown in FIG. 2 , the core back portion 62 has an annular shape surrounding the rotor core 20 . The core back portion 62 has an annular shape centered on the central axis J, for example.
多個齒63從鐵芯背部62向徑向內側延伸。多個齒63沿周向隔開間隔地排列配置。多個齒63例如沿周向在整周範圍內等間隔地配置。齒63例如設有48個。亦即，旋轉電機1的槽數例如為48。如圖3所示，多個齒63分別具有基部63a和傘部63b。 The plurality of teeth 63 extend radially inward from the core back portion 62 . The plurality of teeth 63 are arranged at intervals in the circumferential direction. The plurality of teeth 63 are arranged at equal intervals over the entire circumference, for example, in the circumferential direction. For example, 48 teeth 63 are provided. That is, the number of slots of the rotating electrical machine 1 is, for example, 48. As shown in FIG. 3 , each of the plurality of teeth 63 has a base portion 63a and an umbrella portion 63b.
基部63a從鐵芯背部62朝向徑向內側延伸。基部63a的周向的尺寸例如在徑向的整體範圍內相同。另外，基部63a的周向的尺寸例如也可以隨著朝向徑向內側而變小。 The base portion 63a extends radially inward from the core back portion 62 . The circumferential size of the base portion 63a is the same in the entire radial direction, for example. In addition, for example, the circumferential size of the base portion 63a may become smaller toward the radially inner side.
傘部63b設置於基部63a的徑向內側的端部，其比基部 63a向周向的兩側突出，且其周向尺寸比基部63a的徑向內側的端部的周向尺寸大。傘部63b的徑向內側的面是沿周向延伸的曲面，其在沿軸向觀察時呈以中心軸線J為中心的圓弧狀延伸，且與後述的轉子鐵芯20的外周面在徑向上隔著間隙對置。在沿周向相鄰的齒63彼此中，傘部63b彼此沿周向隔著間隙排列配置。 The umbrella part 63b is provided at the radially inner end of the base part 63a, which is larger than the base part 63a. 63a protrudes to both sides in the circumferential direction, and its circumferential dimension is larger than the circumferential dimension of the radially inner end of the base portion 63a. The radially inner surface of the umbrella portion 63 b is a curved surface extending in the circumferential direction, which extends in an arc shape with the central axis J as the center when viewed in the axial direction, and is radially aligned with the outer peripheral surface of the rotor core 20 described below. Opposite each other across the gap. Among the teeth 63 adjacent to each other in the circumferential direction, the umbrella portions 63 b are arranged side by side with a gap in the circumferential direction.
上述多個線圈65安裝於定子鐵芯61。如圖1所示，多個線圈65例如隔著絕緣件64安裝於齒63。在本實施方式中，線圈65是分散式繞組。也就是說，各線圈65跨越多個齒63而捲繞。在本實施方式中，線圈65是全距繞組。也就是說，***有線圈65的定子60的槽彼此的周向間距與向定子60供給三相交流電源時產生的磁極的周向間距相等。旋轉電機1的極數例如為8。也就是說，旋轉電機1例如是8極48槽的旋轉電機。這樣，在本實施方式的旋轉電機1中，當極數設為N時，槽數為N×6。另外，圖3~5中省略了線圈65的圖示、圖2~5省略了絕緣件64的圖示。 The plurality of coils 65 are mounted on the stator core 61 . As shown in FIG. 1 , the plurality of coils 65 are attached to the teeth 63 with an insulator 64 interposed therebetween. In this embodiment, the coil 65 is a distributed winding. That is, each coil 65 is wound across a plurality of teeth 63 . In this embodiment, the coil 65 is a full pitch winding. That is, the circumferential distance between the slots of the stator 60 in which the coil 65 is inserted is equal to the circumferential distance between the magnetic poles generated when three-phase AC power is supplied to the stator 60 . The number of poles of the rotating electric machine 1 is eight, for example. That is, the rotating electrical machine 1 is, for example, an 8-pole 48-slot rotating electrical machine. Thus, in the rotating electrical machine 1 of this embodiment, when the number of poles is N, the number of slots is N×6. In addition, the coil 65 is omitted from the illustration in FIGS. 3 to 5 , and the insulating material 64 is omitted from the illustration in FIGS. 2 to 5 .
轉子10可以中心軸線J為中心旋轉，其如圖2所示具有軸11、轉子鐵芯20及多個磁鐵40。軸11為以中心軸線J為中心沿軸向延伸的圓柱狀。如圖1所示，軸11被軸承5a、5b支承為可繞中心軸線J旋轉。 The rotor 10 can rotate around the central axis J and has a shaft 11, a rotor core 20 and a plurality of magnets 40 as shown in FIG. 2 . The shaft 11 has a cylindrical shape extending in the axial direction with the central axis J as the center. As shown in FIG. 1 , the shaft 11 is rotatably supported around the central axis J by bearings 5 a and 5 b.
轉子鐵芯20是磁性體。轉子鐵芯20固定於軸11的外周面。轉子鐵芯20具有沿軸向貫通轉子鐵芯20的貫通孔21。如圖2所示，在沿軸向觀察時，貫通孔21為以中心軸線J為中心的圓形狀。軸11通過貫通孔21。軸11例如藉由壓入等方式固定於 貫通孔21內。雖然省略了圖示，轉子鐵芯20例如藉由多個電磁鋼板沿軸向層疊而構成。 The rotor core 20 is a magnetic body. The rotor core 20 is fixed to the outer peripheral surface of the shaft 11 . The rotor core 20 has a through hole 21 penetrating the rotor core 20 in the axial direction. As shown in FIG. 2 , when viewed in the axial direction, the through hole 21 has a circular shape centered on the central axis J. The shaft 11 passes through the through hole 21 . The shaft 11 is fixed to the inside the through hole 21. Although illustration is omitted, the rotor core 20 is configured by laminating a plurality of electromagnetic steel plates in the axial direction, for example.
轉子鐵芯20具有多個收納孔30，其例如沿軸向貫通轉子鐵芯20。所述多個收納孔30的內部分別收納有多個磁鐵40。各收納孔30內的磁鐵40的固定方法沒有特別限定。所述多個收納孔30包含一對第一收納孔31a、31b和第二收納孔32。 The rotor core 20 has a plurality of receiving holes 30 , which pass through the rotor core 20 in the axial direction, for example. A plurality of magnets 40 are respectively stored inside the plurality of storage holes 30 . The method of fixing the magnet 40 in each storage hole 30 is not particularly limited. The plurality of storage holes 30 include a pair of first storage holes 31a, 31b and a second storage hole 32.
前述多個磁鐵40的種類沒有特別限定，例如可以是釹磁石，也可以是鐵氧體磁石。前述多個磁鐵40包含一對第一磁鐵41a、41b和第二磁鐵42。 The types of the magnets 40 are not particularly limited. For example, they may be neodymium magnets or ferrite magnets. The plurality of magnets 40 include a pair of first magnets 41a, 41b and a second magnet 42.
在本實施方式中，一對第一收納孔31a、31b、一對第一磁鐵41a、41b、第二收納孔32以及第二磁鐵42沿周向隔開間隔地各設置有多個。一對第一收納孔31a、31b、一對第一磁鐵41a、41b、第二收納孔32以及第二磁鐵42例如各設置有八個。 In this embodiment, a plurality of the pair of first storage holes 31a and 31b, the pair of first magnets 41a and 41b, the second storage holes 32 and the second magnets 42 are provided at intervals in the circumferential direction. For example, eight of each of the pair of first storage holes 31a and 31b, the pair of first magnets 41a and 41b, the second storage holes 32 and the second magnets 42 are provided.
轉子10具有多個磁極部70，各磁極部70包含一對第一收納孔31a、31b、一對第一磁鐵41a、41b、一個第二收納孔32以及一個第二磁鐵42。磁極部70例如設置有八個。多個磁極部70例如沿周向在整周範圍內等間隔地配置。多個磁極部70包含多個在轉子鐵芯20的外周面的磁極為N極的磁極部70N和多個在轉子鐵芯20的外周面的磁極為S極的磁極部70S。磁極部70N和磁極部70S例如各設置有四個。四個磁極部70N和四個磁極部70S沿周向交替地配置。各磁極部70的結構除了轉子鐵芯20的外周面的磁極不同和周向位置不同之外是相同的結構。 The rotor 10 has a plurality of magnetic pole portions 70 , and each magnetic pole portion 70 includes a pair of first receiving holes 31 a and 31 b, a pair of first magnets 41 a and 41 b, a second receiving hole 32 and a second magnet 42 . For example, eight magnetic pole portions 70 are provided. The plurality of magnetic pole portions 70 are arranged at equal intervals over the entire circumference in the circumferential direction, for example. The plurality of magnetic pole portions 70 include a plurality of N-pole magnetic pole portions 70N on the outer peripheral surface of the rotor core 20 and a plurality of S-pole magnetic pole portions 70S on the outer peripheral surface of the rotor core 20 . For example, four magnetic pole portions 70N and 70S are provided each. The four magnetic pole portions 70N and the four magnetic pole portions 70S are alternately arranged in the circumferential direction. The structures of the respective magnetic pole portions 70 are the same except for the different magnetic poles on the outer peripheral surface of the rotor core 20 and the different circumferential positions.
如圖3所示，在磁極部70中，一對第一收納孔31a、31b沿周向彼此隔開間隔地配置。第一收納孔31a例如位於第一收納孔31b的周向一側(+θ側)。例如在沿軸向觀察時，第一收納孔31a、31b沿相對於徑向而傾斜的方向呈大致直線狀延伸。在沿軸向觀察時，一對第一收納孔31a、31b沿著隨著從徑向內側朝向徑向外側而彼此在周向上遠離的方向延伸。也就是說，第一收納孔31a與第一收納孔31b之間的周向的距離隨著從徑向內側朝向徑向外側而變大。第一收納孔31a例如隨著從徑向內側朝向徑向外側而位於周向一側。第一收納孔31b例如隨著從徑向內側朝向徑向外側而位於周向另一側(-θ側)。第一收納孔31a、31b的徑向外側的端部位於轉子鐵芯20的徑向外周緣部。 As shown in FIG. 3 , in the magnetic pole portion 70 , a pair of first storage holes 31 a and 31 b are arranged at intervals in the circumferential direction. The first storage hole 31a is located, for example, on the circumferential side (+ θ side) of the first storage hole 31b. For example, when viewed in the axial direction, the first storage holes 31a and 31b extend substantially linearly in a direction inclined with respect to the radial direction. When viewed in the axial direction, the pair of first receiving holes 31 a and 31 b extend in a direction that is circumferentially separated from each other from the radially inner side toward the radial outer side. That is, the circumferential distance between the first accommodation hole 31a and the first accommodation hole 31b becomes larger from the radially inner side toward the radial outer side. For example, the first accommodation hole 31a is located on one side in the circumferential direction from the radially inner side toward the radial outer side. For example, the first accommodation hole 31b is located on the other circumferential side ( -θ side) from the radial inner side toward the radial outer side. The radially outer end portions of the first accommodation holes 31 a and 31 b are located at the radially outer peripheral edge portion of the rotor core 20 .
例如在沿軸向觀察時，第一收納孔31a與31b以在周向上隔著圖3所示的磁極中心線IL1的方式配置。IL1是通過磁極部70的周向中心和中心軸線J並沿徑向延伸的假想線。例如在沿軸向觀察時，第一收納孔31a與31b以對磁極中心線IL1呈線對稱的方式配置。以下，關於除了對磁極中心線IL1呈線對稱外與第一收納孔31a相同的結構，有時省略關於第一收納孔31b的說明。 For example, when viewed in the axial direction, the first storage holes 31 a and 31 b are arranged so as to be separated from the magnetic pole center line IL1 shown in FIG. 3 in the circumferential direction. IL1 is an imaginary line that passes through the circumferential center of the magnetic pole portion 70 and the central axis J and extends in the radial direction. For example, when viewed in the axial direction, the first receiving holes 31a and 31b are arranged to be linearly symmetrical with respect to the magnetic pole center line IL1. Hereinafter, description of the first housing hole 31 b will be omitted in some cases, except that it is linearly symmetrical with respect to the magnetic pole center line IL1 .
第一收納孔31a具有第一直線部31c、內端部31d及外端部31e。在沿軸向觀察時，第一直線部31c沿第一收納孔31a延伸的方向呈直線狀延伸。第一直線部31c例如在沿軸向觀察時為長方形狀。內端部31d與第一直線部31c的徑向內側的端部連接，是第一收納孔31a的徑向內側的端部。外端部31e與第一直線部 31c的徑向外側的端部連接，是第一收納孔31a的徑向外側的端部。第一收納孔31b含第一直線部31f、內端部31g及外端部31h。 The first storage hole 31a has a first linear portion 31c, an inner end portion 31d, and an outer end portion 31e. When viewed in the axial direction, the first linear portion 31c extends linearly along the direction in which the first receiving hole 31a extends. The first linear portion 31c has a rectangular shape when viewed in the axial direction, for example. The inner end portion 31d is connected to the radially inner end portion of the first straight portion 31c and is the radially inner end portion of the first accommodation hole 31a. The outer end portion 31e and the first linear portion The radially outer end of 31c is connected to the radially outer end of the first accommodation hole 31a. The first storage hole 31b includes a first linear portion 31f, an inner end portion 31g, and an outer end portion 31h.
第二收納孔32位於一對第一收納孔31a、31b的徑向外側的端部彼此的周向之間。也就是說，在本實施方式中，第二收納孔32位於外端部31e與外端部31h的周向之間。例如在沿軸向觀察時，第二收納孔32沿與徑向垂直的方向呈大致直線狀延伸。例如在沿軸向觀察時，第二收納孔32沿與磁極中心線IL1垂直的方向延伸。例如在沿軸向觀察時，一對第一收納孔31a、31b和第二收納孔32按照▽形狀配置。 The second storage hole 32 is located in the circumferential direction between the radially outer end portions of the pair of first storage holes 31a and 31b. That is, in this embodiment, the second storage hole 32 is located between the outer end portion 31e and the outer end portion 31h in the circumferential direction. For example, when viewed in the axial direction, the second receiving hole 32 extends substantially linearly in a direction perpendicular to the radial direction. For example, when viewed in the axial direction, the second receiving hole 32 extends in a direction perpendicular to the magnetic pole center line IL1. For example, when viewed in the axial direction, the pair of first storage holes 31a, 31b and the second storage hole 32 are arranged in a ▽ shape.
另外，在本說明書中，關於「某個對象沿與某個方向垂直的方向延伸」，除了包含某個對象沿與某個方向嚴格垂直的方向延伸的情況，還包含某個物件沿與某個方向大致垂直的方向延伸的情況。「與某個方向大致垂直的方向」例如包含因製造時的公差等而相對於與某個方向嚴格垂直的方向在幾度〔°〕左右的範圍內傾斜的方向。 In addition, in this manual, "an object extends in a direction perpendicular to a certain direction" includes not only the case where an object extends in a direction strictly perpendicular to a certain direction, but also includes an object extending along a direction that is strictly perpendicular to a certain direction. The direction extends in a roughly vertical direction. "A direction that is approximately perpendicular to a certain direction" includes, for example, a direction that is inclined within a range of several degrees [°] relative to a direction that is strictly perpendicular to a certain direction due to tolerances during manufacturing.
在沿軸向觀察時，例如，磁極中心線IL1通過第二收納孔32的周向的中心。也就是說，第二收納孔32的周向中心的周向位置例如與磁極部70的周向中心的周向位置一致。第二收納孔32的沿軸向觀察到的形狀例如是相對於磁極中心線IL1呈線對稱的形狀。第二收納孔32位於轉子鐵芯20的徑向外周緣部。 When viewed in the axial direction, for example, the magnetic pole center line IL1 passes through the circumferential center of the second accommodation hole 32 . That is, the circumferential position of the circumferential center of the second accommodation hole 32 coincides with the circumferential position of the circumferential center of the magnetic pole portion 70 , for example. The shape of the second accommodation hole 32 when viewed in the axial direction is, for example, a line-symmetric shape with respect to the magnetic pole center line IL1 . The second receiving hole 32 is located at the radial outer peripheral edge portion of the rotor core 20 .
第二收納孔32具有第二直線部32a、一端部32b以及另一端部32c。在沿軸向觀察時，第二直線部32a沿第二收納孔32 延伸的方向呈直線狀延伸。第二直線部32a例如在沿軸向觀察時為長方形狀。一端部32b與第二直線部32a的周向一側(+θ側)的端部連接，是第二收納孔32的周向一側的端部，且在第一收納孔31a的外端部31e的周向另一側(-θ側)隔開間隔地配置。另一端部32c與第二直線部32a的周向另一側(-θ側)的端部連接，是第二收納孔32的周向另一側的端部，且在第一收納孔31b的外端部31h的周向一側隔開間隔地配置。 The second storage hole 32 has a second straight portion 32a, one end portion 32b, and the other end portion 32c. When viewed in the axial direction, the second linear portion 32 a extends linearly along the direction in which the second accommodation hole 32 extends. The second straight portion 32a has a rectangular shape when viewed in the axial direction, for example. One end 32b is connected to the end of the second straight portion 32a on the circumferential side (+ θ side), is the end of the second accommodation hole 32 on the circumferential side, and is at the outer end of the first accommodation hole 31a. The other side ( -θ side) of 31e in the circumferential direction is spaced apart. The other end portion 32c is connected to the end portion on the other circumferential side ( -θ side) of the second straight portion 32a, is the other end portion of the second accommodation hole 32 on the circumferential direction, and is on the other side of the first accommodation hole 31b. The circumferential side of the outer end portion 31h is spaced apart from each other.
一對第一磁鐵41a、41b分別收納於一對第一收納孔31a、31b的內部，其中41a收納於31a內部、41b收納於31b內部。一對第一磁鐵41a、41b例如在沿軸向觀察時為長方形狀。雖然省略了圖示，一對第一磁鐵41a、41b各自例如為長方體狀。雖然省略了圖示，第一磁鐵41a例如設置於第一收納孔31a內的軸向的整個範圍內，第一磁鐵41b例如設置於第一收納孔31b內的軸向的整個範圍內。一對第一磁鐵41a、41b沿周向彼此隔開間隔地配置。第一磁鐵41a例如位於第一磁鐵41b的周向一側(+θ側)。 The pair of first magnets 41a and 41b are respectively accommodated in the interior of the pair of first accommodation holes 31a and 31b, wherein 41a is accommodated in the interior of 31a and 41b is accommodated in the interior of 31b. The pair of first magnets 41a and 41b have a rectangular shape when viewed in the axial direction, for example. Although illustration is omitted, each of the pair of first magnets 41a and 41b has a rectangular parallelepiped shape, for example. Although illustration is omitted, the first magnet 41a is, for example, provided within the entire axial range of the first accommodation hole 31a, and the first magnet 41b is, for example, provided within the entire axial range of the first accommodation hole 31b. The pair of first magnets 41a and 41b are arranged at intervals in the circumferential direction. The first magnet 41a is located, for example, on one side (+ θ side) of the first magnet 41b in the circumferential direction.
在沿軸向觀察時，第一磁鐵41a沿第一收納孔31a延伸、第一磁鐵41b沿第一收納孔31b延伸。沿軸向觀察時，一對第一磁鐵41a、41b各自例如沿相對於徑向傾斜的方向呈大致直線狀延伸，且一對第一磁鐵41a、41b沿著隨著從徑向內側朝向徑向外側而彼此在周向上遠離的方向延伸。也就是說，第一磁鐵41a與第一磁鐵41b之間的周向的距離隨著從徑向內側朝向徑向外側而變大。 When viewed in the axial direction, the first magnet 41a extends along the first receiving hole 31a, and the first magnet 41b extends along the first receiving hole 31b. When viewed in the axial direction, the pair of first magnets 41a and 41b each extend substantially linearly in a direction inclined with respect to the radial direction, and the pair of first magnets 41a and 41b extend along the radial direction from the radially inner side toward the radial direction. outside and extend in directions away from each other in the circumferential direction. That is, the circumferential distance between the first magnet 41 a and the first magnet 41 b increases from the radially inner side toward the radial outer side.
第一磁鐵41a例如隨著從徑向內側朝向徑向外側而位於周向一側(+θ側)。第一磁鐵41b例如隨著從徑向內側朝向徑向外側而位於周向另一側(-θ側)。例如在沿軸向觀察時，第一磁鐵41a與第一磁鐵41b以在軸向上隔著磁極中心線IL1的方式配置，且第一磁鐵41a與第一磁鐵41b以對磁極中心線IL1呈線對稱的方式配置。以下，關於除了對磁極中心線IL1呈線對稱之外與第一磁鐵41a相同的結構，有時省略關於第一磁鐵41b的說明。 For example, the first magnet 41 a is located on the circumferential side (+ θ side) from the radial inner side toward the radial outer side. For example, the first magnet 41b is located on the other circumferential side ( -θ side) from the radial inner side toward the radial outer side. For example, when viewed in the axial direction, the first magnet 41a and the first magnet 41b are arranged across the magnetic pole center line IL1 in the axial direction, and the first magnet 41a and the first magnet 41b are linearly symmetrical with respect to the magnetic pole center line IL1. configured in a way. Hereinafter, description of the first magnet 41 b will be omitted in some cases, except that the structure is linearly symmetrical with respect to the magnetic pole center line IL1 .
第一磁鐵41a嵌合於第一收納孔31a內，更詳細而言是嵌合於第一直線部31c內。第一磁鐵41a的側面中的與第一直線部31c延伸的方向垂直的方向上的兩側面例如分別與第一直線部31c的內側面接觸。在沿軸向觀察時，在第一直線部31c延伸的方向上，第一磁鐵41a的長度例如與第一直線部31c的長度相同。 The first magnet 41a is fitted in the first storage hole 31a, more specifically, in the first linear portion 31c. Among the side surfaces of the first magnet 41a, both side surfaces in the direction perpendicular to the direction in which the first linear portion 31c extends are in contact with the inner surface of the first linear portion 31c, for example. When viewed in the axial direction, the length of the first magnet 41a is, for example, the same as the length of the first linear portion 31c in the direction in which the first linear portion 31c extends.
在沿軸向觀察時，第一磁鐵41a的延伸方向的兩端部分別與第一收納孔31a的延伸方向的兩端部分開地配置。在沿軸向觀察時，在第一磁鐵41a延伸的方向上，內端部31d和外端部31e分別與第一磁鐵41a的兩側相鄰地配置。在這裡，在本實施方式中，內端部31d構成第一磁通阻隔部51a。外端部31e構成第一磁通阻隔部51b。也就是說，轉子鐵芯20具有在沿軸向觀察時，在第一磁鐵41a延伸的方向上隔著第一磁鐵41a而配置的一對第一磁通阻隔部51a、51b，以及在第一磁鐵41b延伸的方向上隔著第一磁鐵41b而配置的一對第一磁通阻隔部51c、51d。 When viewed in the axial direction, both end portions of the first magnet 41 a in the extending direction are arranged separately from both end portions of the first accommodation hole 31 a in the extending direction. When viewed in the axial direction, in the direction in which the first magnet 41a extends, the inner end portion 31d and the outer end portion 31e are respectively arranged adjacent to both sides of the first magnet 41a. Here, in this embodiment, the inner end portion 31d constitutes the first magnetic flux blocking portion 51a. The outer end portion 31e constitutes the first magnetic flux blocking portion 51b. That is, the rotor core 20 has a pair of first magnetic flux blocking portions 51a and 51b arranged across the first magnet 41a in the direction in which the first magnet 41a extends when viewed in the axial direction, and the first magnetic flux blocking portion 51a and the first magnetic flux blocking portion 51b. A pair of first magnetic flux blocking portions 51c and 51d are arranged across the first magnet 41b in the direction in which the magnet 41b extends.
這樣，轉子鐵芯20具有在沿軸向觀察時，在第一磁鐵 41a延伸的方向上隔著第一磁鐵41a而配置有一對的第一磁通阻隔部51a、51b，在第一磁鐵41b延伸的方向上隔著第一磁鐵41b而配置有一對的第一磁通阻隔部51c、51d。該些第一磁通阻隔部51a、51b、51c、51d、後述的第二磁通阻隔部52a、52b以及後述的第三磁通阻隔部53a、53b是能夠抑制磁通的流動的部分。即，在各磁通阻隔部，磁通難以通過。各磁通阻隔部只要能夠抑制磁通的流動，就沒有特別限定，可以包含空隙部，也可以包含樹脂部等非磁性部。 In this way, the rotor core 20 has, when viewed along the axial direction, the first magnet A pair of first magnetic flux blocking portions 51a and 51b are arranged across the first magnet 41a in the direction in which the first magnet 41a extends. A pair of first magnetic flux blocking portions 51a and 51b are arranged across the first magnet 41b in the direction in which the first magnet 41b extends. Barrier parts 51c, 51d. These first magnetic flux blocking portions 51a, 51b, 51c, and 51d, second magnetic flux blocking portions 52a, 52b to be described later, and third magnetic flux blocking portions 53a and 53b to be described later are portions that can suppress the flow of magnetic flux. That is, it is difficult for magnetic flux to pass through each magnetic flux blocking portion. Each magnetic flux blocking part is not particularly limited as long as it can suppress the flow of magnetic flux. It may include a gap part or a non-magnetic part such as a resin part.
第二磁鐵42收納於第二收納孔32的內部。第二磁鐵42在比一對第一磁鐵41a、41b的徑向內端部靠徑向外側的位置配置於一對第一磁鐵41a、41b彼此之間的周向位置。在沿軸向觀察時，第二磁鐵42沿第二收納孔32延伸。在沿軸向觀察時，第二磁鐵42沿與徑向垂直的方向延伸。例如在沿軸向觀察時，一對第一磁鐵41a、41b和第二磁鐵42按照▽形狀配置。 The second magnet 42 is stored inside the second storage hole 32 . The second magnet 42 is disposed radially outward of the radially inner ends of the pair of first magnets 41a and 41b at a circumferential position between the pair of first magnets 41a and 41b. When viewed along the axial direction, the second magnet 42 extends along the second receiving hole 32 . When viewed in the axial direction, the second magnet 42 extends in a direction perpendicular to the radial direction. For example, when viewed in the axial direction, the pair of first magnets 41a, 41b and the second magnet 42 are arranged in a ▽ shape.
另外，在本說明書中，關於「第二磁鐵配置於一對第一磁鐵彼此之間的周向位置」，只要第二磁鐵的周向位置包含於一對第一磁鐵彼此之間的周向位置即可，第二磁鐵相對於第一磁鐵的徑向位置沒有特別限定。 In addition, in this specification, "the second magnet is arranged at a circumferential position between a pair of first magnets" means that the circumferential position of the second magnet is included in the circumferential position between a pair of first magnets. That is, the radial position of the second magnet relative to the first magnet is not particularly limited.
第二磁鐵42的沿軸向觀察到的形狀例如是相對於磁極中心線IL1呈線對稱的形狀。第二磁鐵42例如在沿軸向觀察時為長方形狀。雖然省略了圖示，第二磁鐵42例如為長方體狀。雖然省略了圖示，第二磁鐵42例如設置於第二收納孔32內的軸向的 整個範圍內。第二磁鐵42的徑向內側部分例如位於一對第一磁鐵41a、41b的徑向外端部彼此的周向之間。第二磁鐵42的徑向外側部分例如位於比一對第一磁鐵41a、41b靠徑向外側的位置。 The shape of the second magnet 42 when viewed in the axial direction is, for example, a line-symmetric shape with respect to the magnetic pole center line IL1 . The second magnet 42 has a rectangular shape when viewed in the axial direction, for example. Although illustration is omitted, the second magnet 42 has a rectangular parallelepiped shape, for example. Although illustration is omitted, the second magnet 42 is provided, for example, in the axial direction of the second accommodation hole 32 . throughout the range. The radially inner portion of the second magnet 42 is located, for example, between the radially outer end portions of the pair of first magnets 41 a and 41 b in the circumferential direction. The radially outer portion of the second magnet 42 is located, for example, radially outer than the pair of first magnets 41a and 41b.
第二磁鐵42嵌合於第二收納孔32內，更詳細而言是嵌合於第二直線部32a內。第二磁鐵42的側面中的與第二直線部32a延伸的方向垂直的徑向上的兩側面例如分別與第二直線部32a的內側面接觸。在沿軸向觀察時，在第二直線部32a延伸的方向上，第二磁鐵42的長度例如與第二直線部32a的長度相同。 The second magnet 42 is fitted in the second storage hole 32, more specifically, in the second linear portion 32a. Among the side surfaces of the second magnet 42, two side surfaces in the radial direction perpendicular to the direction in which the second linear portion 32a extends are in contact with the inner side surfaces of the second linear portion 32a, for example. When viewed in the axial direction, the length of the second magnet 42 is, for example, the same as the length of the second linear portion 32a in the direction in which the second linear portion 32a extends.
在沿軸向觀察時，第二磁鐵42的延伸方向的兩端部分別與第二收納孔32的延伸方向的兩端部分開地配置。在沿軸向觀察時，在第二磁鐵42延伸的方向上，一端部32b和另一端部32c分別與第二磁鐵42的兩側相鄰地配置。此處，在本實施方式中，一端部32b構成第二磁通阻隔部52a。另一端部32c構成第二磁通阻隔部52b。亦即，轉子鐵芯20具有在沿軸向觀察時，在第二磁鐵42延伸的方向上隔著第二磁鐵42配置的一對第二磁通阻隔部52a、52b。一對第二磁通阻隔部52a、52b和第二磁鐵42位於隔著第一磁鐵41a的一對第一磁通阻隔部51a、51b中位於徑向外側的第一磁通阻隔部51b與隔著第一磁鐵41b的一對第一磁通阻隔部51c、51d中位於徑向外側的第一磁通阻隔部51d的周向之間。 When viewed in the axial direction, both end portions of the second magnet 42 in the extending direction are arranged separately from both end portions of the second accommodation hole 32 in the extending direction. When viewed in the axial direction, in the direction in which the second magnet 42 extends, the one end 32 b and the other end 32 c are respectively arranged adjacent to both sides of the second magnet 42 . Here, in this embodiment, the one end portion 32b constitutes the second magnetic flux blocking portion 52a. The other end portion 32c constitutes the second magnetic flux blocking portion 52b. That is, the rotor core 20 has a pair of second magnetic flux blocking portions 52 a and 52 b arranged across the second magnet 42 in the direction in which the second magnet 42 extends when viewed in the axial direction. The pair of second magnetic flux blocking portions 52a, 52b and the second magnet 42 are located between the pair of first magnetic flux blocking portions 51a, 51b with the first magnet 41a sandwiched between the first magnetic flux blocking portion 51b located on the radially outer side. Among the pair of first magnetic flux blocking portions 51c and 51d of the first magnet 41b, the circumferential direction of the first magnetic flux blocking portion 51d located on the outer side in the radial direction is between.
在沿軸向觀察時，第一磁鐵41a的磁極沿與第一磁鐵41a延伸的方向垂直的方向配置、第一磁鐵41b的磁極沿與第一磁鐵41b延伸的方向垂直的方向配置。第二磁鐵42的磁極沿徑向配置。 When viewed in the axial direction, the magnetic poles of the first magnet 41a are arranged in a direction perpendicular to the direction in which the first magnet 41a extends, and the magnetic poles of the first magnet 41b are arranged in a direction perpendicular to the direction in which the first magnet 41b extends. The magnetic poles of the second magnet 42 are arranged in the radial direction.
第一磁鐵41a的磁極中的位於徑向外側的磁極、第一磁鐵41b的磁極中的位於徑向外側的磁極以及第二磁鐵42的磁極中的位於徑向外側的磁極彼此相同。第一磁鐵41a的磁極中的位於徑向內側的磁極、第一磁鐵41b的磁極中的位於徑向內側的磁極以及第二磁鐵42的磁極中的位於徑向內側的磁極彼此相同。 The radially outer magnetic poles among the magnetic poles of the first magnet 41 a , the radially outer magnetic poles among the magnetic poles of the first magnet 41 b , and the radially outer magnetic poles among the magnetic poles of the second magnet 42 are the same as each other. The radially inner magnetic poles among the magnetic poles of the first magnet 41 a , the radially inner magnetic poles among the magnetic poles of the first magnet 41 b , and the radially inner magnetic poles among the magnetic poles of the second magnet 42 are the same as each other.
在磁極部70N中，第一磁鐵41a的磁極中的位於徑向外側的磁極、第一磁鐵41b的磁極中的位於徑向外側的磁極以及第二磁鐵42的磁極中的位於徑向外側的磁極例如是N極。在磁極部70N中，第一磁鐵41a的磁極中的位於徑向內側的磁極、第一磁鐵41b的磁極中的位於徑向內側的磁極以及第二磁鐵42的磁極中的位於徑向內側的磁極例如是S極。 In the magnetic pole portion 70N, the magnetic pole located radially outside among the magnetic poles of the first magnet 41 a , the magnetic pole located radially outside among the magnetic poles of the first magnet 41 b , and the magnetic pole located radially outside among the magnetic poles of the second magnet 42 For example, it is the N pole. In the magnetic pole portion 70N, the radially inner magnetic pole among the magnetic poles of the first magnet 41 a , the radially inner magnetic pole among the magnetic poles of the first magnet 41 b , and the radially inner magnetic pole among the magnetic poles of the second magnet 42 For example, it is the S pole.
雖然省略了圖示，在磁極部70S中，各磁鐵40的磁極配置為相對於磁極部70N反轉。也就是說，在磁極部70S中，第一磁鐵41a的磁極中的位於徑向外側的磁極、第一磁鐵41b的磁極中的位於徑向外側的磁極以及第二磁鐵42的磁極中的位於徑向外側的磁極例如是S極，且第一磁鐵41a的磁極中的位於徑向內側的磁極、第一磁鐵41b的磁極中的位於徑向內側的磁極以及第二磁鐵42的磁極中的位於徑向內側的磁極例如是N極。 Although illustration is omitted, in the magnetic pole portion 70S, the magnetic poles of each magnet 40 are arranged so as to be reversed with respect to the magnetic pole portion 70N. That is, in the magnetic pole portion 70S, the magnetic pole located radially outward among the magnetic poles of the first magnet 41 a , the magnetic pole located radially outward among the magnetic poles of the first magnet 41 b , and the magnetic pole located radially outside among the magnetic poles of the second magnet 42 The magnetic pole toward the outside is, for example, the S pole, and among the magnetic poles of the first magnet 41a, the radially inner magnetic pole, among the magnetic poles of the first magnet 41b, the radially inner magnetic pole, and the second magnet 42, among the magnetic poles, are radially inner. The inward magnetic pole is, for example, the N pole.
轉子鐵芯20還具有一對第三磁通阻隔部53a、53b。一對第三磁通阻隔部53a、53b設置於每個磁極部70。在各磁極部70中，例如在沿軸向觀察時，第三磁通阻隔部53a與第三磁通阻隔部53b以對磁極中心線IL1呈線對稱的方式配置。以下，關於 除了對磁極中心線IL1呈線對稱之外與第三磁通阻隔部53a相同的結構，有時省略關於第三磁通阻隔部53b的說明。第三磁通阻隔部53a、53b例如是利用沿軸向貫通轉子鐵芯20的孔形成的空隙部。例如在沿軸向觀察時，第三磁通阻隔部53a、53b為圓形狀。 The rotor core 20 further has a pair of third magnetic flux blocking portions 53a and 53b. A pair of third magnetic flux blocking portions 53 a and 53 b are provided in each magnetic pole portion 70 . In each magnetic pole portion 70, when viewed in the axial direction, for example, the third magnetic flux blocking portion 53a and the third magnetic flux blocking portion 53b are arranged to be line-symmetrical with respect to the magnetic pole center line IL1. Below, about The third magnetic flux blocking portion 53b has the same structure as the third magnetic flux blocking portion 53a except that it is linearly symmetrical with respect to the magnetic pole center line IL1. The description of the third magnetic flux blocking portion 53b may be omitted. The third magnetic flux blocking portions 53a and 53b are, for example, gaps formed by holes penetrating the rotor core 20 in the axial direction. For example, the third magnetic flux blocking portions 53a and 53b have a circular shape when viewed in the axial direction.
第三磁通阻隔部53a配置於隔著一對第一磁鐵41a、41b的一個第一磁鐵41a而配置的一對第一磁通阻隔部51a、51b中位於徑向外側的第一磁通阻隔部51b與一對第二磁通阻隔部52a、52b中的一個第二磁通阻隔部52a的周向之間。第三磁通阻隔部53a例如位於第一磁通阻隔部51b與第二磁通阻隔部52a的周向之間的中央部。 The third magnetic flux blocking portion 53a is disposed on the radially outer first magnetic flux blocking portion of the pair of first magnetic flux blocking portions 51a and 51b disposed across one first magnet 41a of the pair of first magnets 41a and 41b. between the circumferential direction of the portion 51b and one second magnetic flux blocking portion 52a of the pair of second magnetic flux blocking portions 52a, 52b. The third magnetic flux blocking portion 53a is located, for example, at the center portion between the first magnetic flux blocking portion 51b and the second magnetic flux blocking portion 52a in the circumferential direction.
第三磁通阻隔部53b配置於隔著一對第一磁鐵41a、41b中的另一個第一磁鐵41b而配置的一對第一磁通阻隔部51c、51d中位於徑向外側的第一磁通阻隔部51d與一對第二磁通阻隔部52a、52b中的另一個第二磁通阻隔部52b的周向之間。第三磁通阻隔部53b例如位於第一磁通阻隔部51d與第二磁通阻隔部52b的周向之間的中央部。 The third magnetic flux blocking portion 53b is disposed on the radially outer first magnet of the pair of first magnetic flux blocking portions 51c and 51d disposed across the other first magnet 41b of the pair of first magnets 41a and 41b. Between the flux blocking portion 51d and the other second magnetic flux blocking portion 52b of the pair of second magnetic flux blocking portions 52a, 52b in the circumferential direction. The third magnetic flux blocking portion 53b is located, for example, at the center portion between the first magnetic flux blocking portion 51d and the second magnetic flux blocking portion 52b in the circumferential direction.
在沿軸向觀察時，第三磁通阻隔部53a、53b位於第二磁鐵42延伸的方向的延長線上。在沿軸向觀察時，第三磁通阻隔部53a、53b位於通過第二磁鐵42的徑向內緣的周向兩端部的假想曲線IL6與通過第二磁鐵42的徑向外緣的周向兩端部的假想曲線IL7之間。假想曲線IL6是在沿軸向觀察時，通過第二磁鐵42的徑向內緣的周向兩端部，並沿以中心軸線J為中心的圓弧狀延 伸的假想線。假想曲線IL7是在沿軸向觀察時，通過第二磁鐵42的徑向外緣的周向兩端部，並沿以中心軸線J為中心的圓弧狀延伸的假想線。 When viewed in the axial direction, the third magnetic flux blocking portions 53 a and 53 b are located on the extension line of the direction in which the second magnet 42 extends. When viewed in the axial direction, the third magnetic flux blocking portions 53 a and 53 b are located between the imaginary curve IL6 passing through the circumferential ends of the radial inner edge of the second magnet 42 and the circumference passing through the radial outer edge of the second magnet 42 . Between the imaginary curves IL7 at both ends. When viewed in the axial direction, the imaginary curve IL6 passes through both circumferential ends of the radial inner edge of the second magnet 42 and extends in an arc shape centered on the central axis J. extended imaginary line. The imaginary curve IL7 is an imaginary line that passes through both circumferential ends of the radial outer edge of the second magnet 42 and extends in an arc shape with the central axis J as the center when viewed in the axial direction.
第三磁通阻隔部53a、53b例如位於比第二磁鐵42的徑向外緣靠徑向內側的位置。第三磁通阻隔部53a、53b例如位於比第二磁鐵42的徑向內緣靠徑向外側的位置。第三磁通阻隔部53a、53b例如位於比一對第一磁鐵41a、41b靠徑向外側的位置。 The third magnetic flux blocking portions 53 a and 53 b are, for example, located radially inward of the radial outer edge of the second magnet 42 . The third magnetic flux blocking portions 53 a and 53 b are, for example, located radially outward of the radially inner edge of the second magnet 42 . The third magnetic flux blocking portions 53a and 53b are, for example, located radially outward of the pair of first magnets 41a and 41b.
在本實施方式中，第三磁通阻隔部53a、53b的周向的尺寸W比第一磁通阻隔部51a、51b、51c、51d的周向的尺寸和第二磁通阻隔部52a、52b的周向的尺寸小。在本實施方式中，第三磁通阻隔部53a、53b的周向的尺寸W是圓形狀的第三磁通阻隔部53a、53b的直徑。第三磁通阻隔部53a、53b的周向的尺寸W例如比第一磁通阻隔部51a、51b、51c、51d的周向的尺寸的一半和第二磁通阻隔部52a、52b的周向的尺寸的一半小。第三磁通阻隔部53a、53b的周向的尺寸W例如為2.4mm以下。第三磁通阻隔部53a、53b的周向的尺寸W例如較佳為0.6mm以上2.1mm以下。這是為了能夠適當地降低扭矩波動。 In this embodiment, the circumferential size W of the third magnetic flux blocking portions 53a, 53b is larger than the circumferential size W of the first magnetic flux blocking portions 51a, 51b, 51c, 51d and the second magnetic flux blocking portions 52a, 52b. The circumferential size is small. In this embodiment, the circumferential dimension W of the third magnetic flux blocking portions 53a and 53b is the diameter of the circular third magnetic flux blocking portions 53a and 53b. The circumferential size W of the third magnetic flux blocking portions 53a, 53b is, for example, half the circumferential size of the first magnetic flux blocking portions 51a, 51b, 51c, 51d and the circumferential size of the second magnetic flux blocking portions 52a, 52b. half the size smaller. The circumferential dimension W of the third magnetic flux blocking portions 53a and 53b is, for example, 2.4 mm or less. The circumferential dimension W of the third magnetic flux blocking portions 53a and 53b is preferably, for example, 0.6 mm or more and 2.1 mm or less. This is to appropriately reduce torque ripple.
在本實施方式中，第三磁通阻隔部53a、53b的周向的尺寸W相對於轉子鐵芯20的半徑r的比為0.041以下，且較佳為0.010以上0.035以下。這是為了能夠適當地降低扭矩波動。 In this embodiment, the ratio of the circumferential dimension W of the third magnetic flux blocking portions 53 a and 53 b to the radius r of the rotor core 20 is 0.041 or less, and preferably 0.010 or more and 0.035 or less. This is to appropriately reduce torque ripple.
在本實施方式中，第三磁通阻隔部53a相對於第一磁通阻隔部51b與第二磁通阻隔部52a的周向之間的距離L1的比例如 為0.27以下。圖4所示的距離L1是在圓形的第三磁通阻隔部53a的中心的徑向位置的、第一磁通阻隔部51b與第二磁通阻隔部52a的周向之間的距離。第三磁通阻隔部53a相對於第一磁通阻隔部51b與第二磁通阻隔部52a的周向之間的距離L1的比較佳為0.10以上0.36以下。這是為了能夠適當地降低扭矩波動。第一磁通阻隔部51b與第二磁通阻隔部52a的周向之間的距離L1例如為3.0mm以上7.0mm以下。 In this embodiment, the ratio of the third magnetic flux blocking portion 53a to the circumferential distance L1 between the first magnetic flux blocking portion 51b and the second magnetic flux blocking portion 52a is: is below 0.27. The distance L1 shown in FIG. 4 is the circumferential distance between the first magnetic flux blocking portion 51 b and the second magnetic flux blocking portion 52 a at the radial position of the center of the circular third magnetic flux blocking portion 53 a. The ratio of the third magnetic flux blocking portion 53a to the circumferential distance L1 between the first magnetic flux blocking portion 51b and the second magnetic flux blocking portion 52a is preferably 0.10 or more and 0.36 or less. This is to appropriately reduce torque ripple. The circumferential distance L1 between the first magnetic flux blocking portion 51b and the second magnetic flux blocking portion 52a is, for example, 3.0 mm or more and 7.0 mm or less.
轉子鐵芯20的外周面與第三磁通阻隔部53a之間的徑向的距離L2以及轉子鐵芯20的外周面與第三磁通阻隔部53a的中心的距離L3例如比第三磁通阻隔部53a的周向的尺寸W大。圖4所示的距離L2是在圓形的第三磁通阻隔部53a的中心的周向位置的、轉子鐵芯20的外周面與第三磁通阻隔部53a之間的徑向的距離。距離L2和距離L3例如比從轉子鐵芯20的外周面到第二磁鐵42的徑向的距離大。距離L2例如為0.7mm以上4.2mm以下。距離L3例如1.0mm以上5.2mm以下。距離L3較佳為2.6mm以上3.4mm以下。這是為了容易地適當地降低扭矩波動。 The radial distance L2 between the outer peripheral surface of the rotor core 20 and the third magnetic flux blocking portion 53 a and the distance L3 between the outer peripheral surface of the rotor core 20 and the center of the third magnetic flux blocking portion 53 a are, for example, longer than the third magnetic flux blocking portion 53 a. The circumferential dimension W of the barrier portion 53a is large. The distance L2 shown in FIG. 4 is the radial distance between the outer peripheral surface of the rotor core 20 and the third magnetic flux blocking portion 53a at the circumferential position of the center of the circular third magnetic flux blocking portion 53a. The distance L2 and the distance L3 are, for example, larger than the radial distance from the outer peripheral surface of the rotor core 20 to the second magnet 42 . The distance L2 is, for example, 0.7 mm or more and 4.2 mm or less. The distance L3 is, for example, 1.0 mm or more and 5.2 mm or less. The distance L3 is preferably 2.6 mm or more and 3.4 mm or less. This is to easily and appropriately reduce torque ripple.
在第二磁鐵42的周向中心配置於與某一個齒63的周向中心相同的周向位置的某個狀態下，第三磁通阻隔部53a、53b位於另一個齒63的徑向內側。換句話說，在該某個狀態下，第三磁通阻隔部53a、53b與另一個齒63的周向位置重疊。另外，在本說明書中，關於「某個物件位於其他物件的徑向內側」，除了某個物件相對於中心軸線位於比其他物件靠徑向內側的位置的情況， 也可以是某個物件的至少一部分的周向位置與其他物件的至少一部分的周向位置相同。圖2~5示出了該某個狀態的一例。在圖2~5中，將周向中心配置於與第二磁鐵42的周向中心相同的周向的位置的齒63稱為齒66A。也就是說，在圖2~5所示的某個狀態下，齒66A相當於「某一個齒」。在圖2~5所示的某個狀態下，在沿軸向觀察時，磁極中心線IL1通過齒66A的周向中心。 In a state where the circumferential center of the second magnet 42 is arranged at the same circumferential position as the circumferential center of one of the teeth 63 , the third magnetic flux blocking portions 53 a and 53 b are located radially inward of the other tooth 63 . In other words, in this certain state, the third magnetic flux blocking portions 53 a and 53 b overlap with the circumferential position of the other tooth 63 . In addition, in this specification, regarding "an object is located radially inside of other objects", except for the case where an object is located radially inside of other objects with respect to the central axis, It may also be that the circumferential position of at least a part of a certain object is the same as the circumferential position of at least a part of another object. Figures 2 to 5 show an example of this state. In FIGS. 2 to 5 , the teeth 63 whose circumferential center is disposed at the same circumferential position as the circumferential center of the second magnet 42 are called teeth 66A. That is, in a certain state shown in FIGS. 2 to 5 , the tooth 66A corresponds to "a certain tooth". In a certain state shown in FIGS. 2 to 5 , when viewed in the axial direction, the magnetic pole center line IL1 passes through the circumferential center of the tooth 66A.
在圖2~5所示的某個狀態下，將與齒66A的周向一側(+θ側)相鄰的齒63稱為齒66B、與齒66A的周向另一側(-θ側)相鄰的齒63稱為齒66C、與齒66B的周向一側相鄰的齒63稱為齒66D、與齒66C的周向另一側相鄰的齒63稱為齒66E、與齒66D的周向一側相鄰的齒63稱為齒66F。另外，在以下的說明中，將圖2至圖5所示的某個狀態簡稱為「某個狀態」。 In a certain state shown in FIGS. 2 to 5 , the tooth 63 adjacent to the circumferential side (+ θ side) of the tooth 66A is called a tooth 66B, and the tooth 63 adjacent to the other circumferential side (- θ side) of the tooth 66A is called a tooth 66B. ) The adjacent teeth 63 are called teeth 66C, the teeth 63 adjacent to one side of the tooth 66B in the circumferential direction are called teeth 66D, the teeth 63 adjacent to the other side of the tooth 66C in the circumferential direction are called teeth 66E, and the teeth 63 are called teeth 66E. The teeth 63 adjacent to the circumferential side of 66D are called teeth 66F. In addition, in the following description, a certain state shown in FIG. 2 to FIG. 5 is simply called "a certain state".
如圖3所示，在某個狀態下，第三磁通阻隔部53a位於齒66D的徑向內側、第三磁通阻隔部53b位於齒66E的徑向內側。亦即，在某個狀態下，齒66D、66E相當於「另一個齒」。此處齒66D、66E分別是在周向上與相當於「某一個齒」的齒66A隔開一個齒而配置的齒。亦即，本實施方式中，作為「另一個齒」的齒66D、66E是在周向上與「某一個齒」隔開一個齒而配置的齒63。 As shown in FIG. 3 , in a certain state, the third magnetic flux blocking portion 53 a is located radially inside the tooth 66D, and the third magnetic flux blocking portion 53 b is located radially inside the tooth 66E. That is, in a certain state, the teeth 66D and 66E correspond to "another tooth". Here, the teeth 66D and 66E are respectively disposed one tooth apart from the tooth 66A corresponding to "a certain tooth" in the circumferential direction. That is, in this embodiment, the teeth 66D and 66E as the "other teeth" are teeth 63 arranged one tooth apart from the "certain tooth" in the circumferential direction.
在本實施方式中，在某個狀態下，第三磁通阻隔部53a位於齒66D中的接近第二磁鐵42的周向中心的一側(-θ側)的部分的徑向內側。齒66D中的接近第二磁鐵42的周向中心的一側的部分是齒66D中的比齒中心線IL2接近第二磁鐵42的周向中心 的一側的部分。齒中心線IL2是通過齒66D的周向中心和中心軸線J並沿徑向延伸的假想線。在某個狀態下，在沿軸向觀察時，第三磁通阻隔部53a位於齒中心線IL2與假想線IL3的周向之間。假想線IL3是在沿軸向觀察時，通過齒66D的傘部63b的周向另一側(-θ側)的端部和中心軸線J並沿徑向延伸的假想線。 In the present embodiment, in a certain state, the third magnetic flux blocking portion 53 a is located radially inward of a portion of the tooth 66D that is close to the circumferential center of the second magnet 42 (the −θ side). The portion of the tooth 66D on the side closer to the circumferential center of the second magnet 42 is the portion of the tooth 66D on the side closer to the circumferential center of the second magnet 42 than the tooth center line IL2 . The tooth center line IL2 is an imaginary line passing through the circumferential center of the tooth 66D and the central axis J and extending in the radial direction. In a certain state, when viewed in the axial direction, the third magnetic flux blocking portion 53 a is located between the tooth center line IL2 and the circumferential direction of the imaginary line IL3 . The imaginary line IL3 is an imaginary line extending in the radial direction through the end of the other circumferential side ( -θ side) of the umbrella portion 63 b of the tooth 66D and the central axis J when viewed in the axial direction.
在本實施方式中，在某個狀態下，在沿軸向觀察時，第三磁通阻隔部53b位於齒中心線IL4與假想線IL5的周向之間。齒中心線IL4是通過齒66E的周向中心和中心軸線J並沿徑向延伸的假想線。IL5是在沿軸向觀察時，通過齒66E的傘部63b的周向一側(+θ側)的端部和中心軸線J並沿徑向延伸的假想線。 In this embodiment, in a certain state, when viewed in the axial direction, the third magnetic flux blocking portion 53b is located between the tooth center line IL4 and the circumferential direction of the imaginary line IL5. The tooth center line IL4 is an imaginary line passing through the circumferential center of the tooth 66E and the central axis J and extending in the radial direction. IL5 is an imaginary line extending in the radial direction through the end of the circumferential side (+ θ side) of the umbrella portion 63 b of the tooth 66E and the central axis J when viewed in the axial direction.
在某個狀態下，齒66B的至少一部分和齒66C的至少一部分位於第二磁鐵42的徑向外側。齒66B是以相鄰的方式配置在齒66A與齒66D的周向之間的齒63。齒66C是以相鄰的方式配置在齒66A與齒66E的周向之間的齒63。也就是說，在某個狀態下，以相鄰的方式配置在作為「某一個齒」的齒66A與作為「另一個齒」的齒66D、66E的周向之間的齒66B、66C的至少一部分位於第二磁鐵42的徑向外側。在某個狀態下，例如，齒66B的周向另一側(-θ側)的部分和齒66C的周向一側(+θ側)的部分位於第二磁鐵42的徑向外側。 In a certain state, at least a part of the teeth 66B and at least a part of the teeth 66C are located radially outside the second magnet 42 . Teeth 66B are teeth 63 arranged adjacently between teeth 66A and teeth 66D in the circumferential direction. Teeth 66C are teeth 63 arranged adjacently between teeth 66A and teeth 66E in the circumferential direction. That is, in a certain state, at least part of the teeth 66B and 66C that are adjacently arranged in the circumferential direction between the teeth 66A as "one tooth" and the teeth 66D and 66E as "the other tooth" are located radially outer side of the second magnet 42 . In a certain state, for example, the portion on the other circumferential side ( -θ side) of the tooth 66B and the portion on the circumferential one side (+ θ side) of the tooth 66C are located outside the second magnet 42 in the radial direction.
在某個狀態下，隔著第一磁鐵41a配置的一對第一磁通阻隔部51a、51b中位於徑向外側的第一磁通阻隔部51b位於齒66D之遠離第二磁鐵42的周向中心的一側(+θ側)的部分的徑向內 側。齒66D之遠離第二磁鐵42的周向中心的一側的部分是齒66D中的比齒中心線IL2遠離第二磁鐵42的周向中心的一側的部分。 In a certain state, the first magnetic flux blocking portion 51b located on the radially outer side of the pair of first magnetic flux blocking portions 51a and 51b arranged across the first magnet 41a is located in the circumferential direction of the tooth 66D away from the second magnet 42 The radially inner side of the part on one side of the center (+ θ side). The portion of the tooth 66D on the side farther from the circumferential center of the second magnet 42 is the portion of the tooth 66D on the side farther from the circumferential center of the second magnet 42 than the tooth center line IL2 .
轉子鐵芯20具有從轉子鐵芯20的外周面向徑向內側凹陷的凹部22a、22b。在本實施方式中，凹部22a、22b在每個磁極部70各設置有一對。在各磁極部70中，例如在沿軸向觀察時，凹部22a和凹部22b以對磁極中心線IL1呈線對稱的方式配置。以下，關於除了相對於磁極中心線IL1呈線對稱之外與凹部22a相同的結構，有時省略關於凹部22b的說明。凹部22a例如位於第一磁通阻隔部51b的徑向外側。凹部22b例如位於第一磁通阻隔部51d的徑向外側。凹部22a、22b的沿軸向觀察到的內緣例如呈向徑向內側凹陷的大致圓弧狀。 The rotor core 20 has recessed portions 22 a and 22 b that are recessed radially inward from the outer peripheral surface of the rotor core 20 . In this embodiment, a pair of recessed portions 22a and 22b are provided for each magnetic pole portion 70 . In each magnetic pole portion 70, when viewed in the axial direction, for example, the recessed portions 22a and 22b are arranged to be line-symmetrical with respect to the magnetic pole center line IL1. Hereinafter, description of the recessed portion 22b will be omitted in some cases, except that it is linearly symmetrical with respect to the magnetic pole center line IL1 and has the same structure as the recessed portion 22a. The recessed portion 22a is located, for example, radially outward of the first magnetic flux blocking portion 51b. The recessed portion 22b is located, for example, radially outward of the first magnetic flux blocking portion 51d. The inner edges of the recessed portions 22 a and 22 b when viewed in the axial direction have, for example, a substantially arc shape that is depressed inward in the radial direction.
在某個狀態下，凹部22a配置於比齒66D的周向中心沿周向遠離第二磁鐵的周向中心的一側(+θ側)。也就是說，凹部22a位於比齒中心線IL2靠周向一側(+θ側)的位置。在某個狀態下，凹部22a的至少一部分位於齒66D的徑向內側。在本實施方式中，在某個狀態下，凹部22a的周向另一側(-θ側)的端部位於齒66D的傘部63b的周向一側(+θ側)的端部的徑向內側。 In a certain state, the recessed portion 22 a is disposed on the side (+ θ side) that is circumferentially away from the circumferential center of the second magnet in the circumferential direction of the ratio gear 66D. That is, the recessed portion 22a is located on the circumferential side (+ θ side) relative to the tooth center line IL2. In a certain state, at least a part of the recessed portion 22a is located radially inside the tooth 66D. In this embodiment, in a certain state, the end of the recessed portion 22 a on the other circumferential side ( -θ side) is located at a diameter of the end of the umbrella portion 63 b of the tooth 66D on one circumferential side (+θ side). Inwardly.
按照本實施方式，藉由設置有第三磁通阻隔部53a、53b，能夠降低扭矩波動，其詳細說明如下。如圖4所示，在轉子10與定子60之間流動的磁通有時包含從齒63放出，通過轉子鐵芯20並再次返回相同齒63的磁通。圖4所示的磁通B48例如是在轉子10與定子60之間流動的磁通的48次分量。 According to this embodiment, torque ripple can be reduced by providing the third magnetic flux blocking portions 53a and 53b, which will be described in detail below. As shown in FIG. 4 , the magnetic flux flowing between the rotor 10 and the stator 60 sometimes includes magnetic flux that is released from the teeth 63 , passes through the rotor core 20 , and returns to the same teeth 63 again. The magnetic flux B48 shown in FIG. 4 is, for example, the 48th order component of the magnetic flux flowing between the rotor 10 and the stator 60 .
圖4所示的磁通B48中的磁通B48a例如是從齒66A的周向中心向徑向內側放出，通過轉子鐵芯20並返回到齒66A的傘部63b的周向一側(+θ側)的端部的磁通。磁通B48a通過轉子鐵芯20中的位於第二磁鐵42的徑向外側的部分。 The magnetic flux B48a among the magnetic fluxes B48 shown in FIG. 4 is emitted from the circumferential center of the tooth 66A radially inward, passes through the rotor core 20, and returns to the circumferential side (+ θ of the umbrella portion 63b of the tooth 66A). side) of the end of the magnetic flux. The magnetic flux B48a passes through the portion of the rotor core 20 located radially outside the second magnet 42 .
圖4所示的磁通B48中的磁通B48b例如是從齒66D的周向中心向徑向內側放出，通過轉子鐵芯20並返回到齒66D的傘部63b的周向另一側(-θ側)的端部的磁通。磁通B48b通過轉子鐵芯20中的周向位置位於第一磁通阻隔部51b與第二磁通阻隔部52a之間的周向位置的部分。 The magnetic flux B48b among the magnetic fluxes B48 shown in FIG. 4 is emitted from the circumferential center of the tooth 66D radially inward, passes through the rotor core 20 and returns to the other circumferential side (-- of the umbrella portion 63b of the tooth 66D). Magnetic flux at the end of the θ side). The magnetic flux B48b passes through a portion of the rotor core 20 whose circumferential position is between the first magnetic flux blocking portion 51b and the second magnetic flux blocking portion 52a.
在這裡，假設在未設置有第三磁通阻隔部53a的情況下，如在圖4中用雙點虛線所示，從齒66D向轉子鐵芯20內放出的磁通B48b在第一磁通阻隔部51b與第二磁通阻隔部52a的周向之間的部分較大地繞至徑向內側，然後返回齒66D。 Here, assuming that the third magnetic flux blocking portion 53a is not provided, as shown by the two-dot dotted line in FIG. 4 , the magnetic flux B48b discharged from the teeth 66D into the rotor core 20 is The portion between the blocking portion 51 b and the second magnetic flux blocking portion 52 a in the circumferential direction is largely wound to the radially inner side, and then returns to the tooth 66D.
另一方面，藉由設置有第二磁鐵42，從齒66A放出的磁通B48a在轉子鐵芯20中的位於第二磁鐵42的徑向外側的部分較小地環繞並返回齒66A。因此，在未設置有第三磁通阻隔部53a的情況下，在齒66A與轉子鐵芯20之間流動的磁通B48a的流動和在齒66D與轉子鐵芯20之間流動的磁通B48b的流動容易相差較大。由此，在齒66A與轉子鐵芯20之間作用的磁力的變動幅度與在齒66D與轉子鐵芯20之間作用的磁力的變動幅度有偏差，從而在各齒63與轉子鐵芯20之間作用的磁力容易產生偏差。因此，存在扭矩波動容易變大的問題。 On the other hand, by providing the second magnet 42 , the magnetic flux B48 a emitted from the teeth 66A slightly surrounds and returns to the teeth 66A in the portion of the rotor core 20 located radially outward of the second magnet 42 . Therefore, when the third magnetic flux blocking portion 53 a is not provided, the flow of the magnetic flux B48 a flowing between the teeth 66A and the rotor core 20 and the flow of the magnetic flux B48 b flowing between the teeth 66D and the rotor core 20 The flow is likely to vary greatly. Therefore, the fluctuation range of the magnetic force acting between the teeth 66A and the rotor core 20 deviates from the fluctuation range of the magnetic force acting between the teeth 66D and the rotor core 20 , so that there is a gap between each tooth 63 and the rotor core 20 . The magnetic force acting between them is prone to deviation. Therefore, there is a problem that torque ripple tends to increase.
與此相對，本實施方式在第一磁通阻隔部51b與第二磁通阻隔部52a的周向之間設置有第三磁通阻隔部53a，且第三磁通阻隔部53a在第二磁鐵42的周向中心配置於與某一個齒66A的周向中心相同的周向位置的某個狀態下位於另一個齒66D的徑向內側。因此，如在圖4中用實線所示，能夠藉由第三磁通阻隔部53a抑制從齒66D向轉子鐵芯20放出的磁通B48b在轉子鐵芯20內向徑向內側較大地環繞的情況。由此，容易使從齒66D放出的磁通B48b通過轉子鐵芯20中的位於比第三磁通阻隔部53a靠徑向外側的位置的部分並返回齒66D。因此，容易使在齒66D與轉子鐵芯20之間流動的磁通B48b的流動與在齒66A與轉子鐵芯20之間流動的磁通B48a的流動相同。因此，能夠抑制在齒66A與轉子鐵芯20之間作用的磁力的變動幅度與在齒66D與轉子鐵芯20之間作用的磁力的變動幅度產生偏差，從而能夠抑制在各齒63與轉子鐵芯20之間作用的磁力產生偏差。由此可降低扭矩波動。 In contrast, in this embodiment, a third magnetic flux blocking portion 53a is provided between the first magnetic flux blocking portion 51b and the second magnetic flux blocking portion 52a in the circumferential direction, and the third magnetic flux blocking portion 53a is located on the second magnet 42 In a state where the circumferential center is arranged at the same circumferential position as the circumferential center of one tooth 66A, it is located radially inside of the other tooth 66D. Therefore, as shown by the solid line in FIG. 4 , the third magnetic flux blocking portion 53 a can prevent the magnetic flux B48 b released from the teeth 66D toward the rotor core 20 from greatly surrounding the rotor core 20 radially inward. condition. This makes it easy for the magnetic flux B48b released from the teeth 66D to pass through the portion of the rotor core 20 located radially outward of the third magnetic flux blocking portion 53a and return to the teeth 66D. Therefore, it is easy to make the flow of the magnetic flux B48b flowing between the teeth 66D and the rotor core 20 the same as the flow of the magnetic flux B48a flowing between the teeth 66A and the rotor core 20 . Therefore, it is possible to suppress deviations between the fluctuation range of the magnetic force acting between the teeth 66A and the rotor iron core 20 and the fluctuation range of the magnetic force acting between the teeth 66D and the rotor iron core 20 , thereby suppressing the deviation between the teeth 63 and the rotor iron. The magnetic force acting between the cores 20 causes deviation. This reduces torque ripples.
另外，本實施方式在第一磁通阻隔部51d與第二磁通阻隔部52b的周向之間設有第三磁通阻隔部53b，且第三磁通阻隔部53b在第二磁鐵42的周向中心配置於與某一個齒66A的周向中心相同的周向位置的某個狀態下位於另一個齒66E的徑向內側。因此，與在齒66D與轉子鐵芯20之間流動的上述的磁通B48b相同，容易使在齒66E與轉子鐵芯20之間流動的磁通的流動與在齒66A與轉子鐵芯20之間流動的磁通B48a相同。由此可進一步抑制在各齒63與轉子鐵芯20之間作用的磁力產生偏差。因此可進一步 在周向上降低磁通的流動的偏差，從而能夠進一步降低扭矩波動。 In addition, in this embodiment, a third magnetic flux blocking portion 53b is provided between the first magnetic flux blocking portion 51d and the second magnetic flux blocking portion 52b in the circumferential direction, and the third magnetic flux blocking portion 53b is located in the circumferential direction of the second magnet 42. The center is disposed at the same circumferential position as the circumferential center of one tooth 66A and is located radially inside of the other tooth 66E. Therefore, like the above-mentioned magnetic flux B48b flowing between the teeth 66D and the rotor core 20 , the flow of the magnetic flux flowing between the teeth 66E and the rotor core 20 is easily made similar to that between the teeth 66A and the rotor core 20 . The magnetic flux B48a flowing between them is the same. This can further suppress deviations in the magnetic force acting between each tooth 63 and the rotor core 20 . Therefore it can be further By reducing deviations in the flow of magnetic flux in the circumferential direction, torque ripple can be further reduced.
另外，例如，在轉子10與定子60之間流動的磁通包含如圖4所示那樣的48次分量的磁通B48的情況下，在轉子10與定子60之間流動的磁通例如也包含如圖5所示那樣的24次分量的磁通B24。磁通B24例如經由轉子鐵芯20在位於磁極部70的周向中心的徑向外側的齒66A與在周向上與齒66A相鄰的齒66B、66C之間流動。在圖5中，磁通B24例如從齒66A通過轉子鐵芯20向齒66B流動。這樣的24次分量的磁通B24難以向在周向上與齒66A隔開一個齒而配置的齒66D、66E流動。 For example, when the magnetic flux flowing between the rotor 10 and the stator 60 includes the 48th-order component magnetic flux B48 as shown in FIG. 4 , the magnetic flux flowing between the rotor 10 and the stator 60 also includes, for example, Magnetic flux B24 of the 24th order component as shown in FIG. 5 . The magnetic flux B24 flows, for example, via the rotor core 20 between the teeth 66A located radially outside the circumferential center of the magnetic pole portion 70 and the teeth 66B and 66C adjacent to the teeth 66A in the circumferential direction. In FIG. 5 , the magnetic flux B24 flows from the teeth 66A to the teeth 66B through the rotor core 20 , for example. Such 24th order component magnetic flux B24 hardly flows to the teeth 66D and 66E which are arranged one tooth apart from the tooth 66A in the circumferential direction.
此處，按照本實施方式，在某個狀態下，位於第三磁通阻隔部53a、53b的徑向外側的齒66D、66E是在周向上與齒66A隔開一個齒而配置的齒63。因此，在某個狀態下，24次分量的磁通B24難以向齒66D、66E和轉子鐵芯20中的位於齒66D、66E的徑向內側的部分流動。由此，即使設置有第三磁通阻隔部53a、53b，24次分量的磁通B24的流動也難以被阻礙。因此，即使設置有第三磁通阻隔部53a、53b，也能夠抑制因24次分量的磁通B24而引起扭矩波動增大的情況。這樣，按照本實施方式，能夠如上述那樣藉由第三磁通阻隔部53a、53b降低因48次分量的磁通B48而引起的扭矩波動，並且能夠抑制因24次分量的磁通B24而引起扭矩波動增大的情況。因此，能夠更適當地降低扭矩波動。 Here, according to this embodiment, in a certain state, the teeth 66D and 66E located radially outward of the third magnetic flux blocking portions 53a and 53b are the teeth 63 arranged one tooth apart from the teeth 66A in the circumferential direction. Therefore, in a certain state, it is difficult for the 24th-order magnetic flux B24 to flow toward the teeth 66D and 66E and the portions of the rotor core 20 located radially inward of the teeth 66D and 66E. Therefore, even if the third magnetic flux blocking portions 53a and 53b are provided, the flow of the 24th-order component magnetic flux B24 is less likely to be blocked. Therefore, even if the third magnetic flux blocking portions 53a and 53b are provided, it is possible to suppress an increase in torque ripple due to the 24th order component magnetic flux B24. In this way, according to this embodiment, as described above, the torque ripple caused by the 48th-order magnetic flux B48 can be reduced by the third magnetic flux blocking portions 53a and 53b, and the torque ripple caused by the 24th-order magnetic flux B24 can be suppressed. A situation in which torque ripple increases. Therefore, torque ripple can be reduced more appropriately.
另外，按照本實施方式，在某個狀態下，以相鄰的方式配置在某一個齒66A與另一個齒66D、66E的周向之間的齒66B、 66C的至少一部分位於第二磁鐵42的徑向外側。在某個狀態下，藉由使齒66B、66C的至少一部分位於第二磁鐵42的徑向外側，能夠利用第二磁鐵42的磁通，容易使24次分量的磁通B24從齒66A向齒66B、66C適當地流動。因此，24次分量的磁通B24更難向與齒66A隔開一個齒而配置的齒66D、66E流動。由此，在某個狀態下，24次分量的磁通B24更難向轉子鐵芯20中的位於齒66D、66E的徑向內側的部分流動。因此，即使設置第三磁通阻隔部53a、53b，也能夠使24次分量的磁通B24的流動難以被阻礙。因此，即使設置第三磁通阻隔部53a、53b，也能夠更可靠地抑制因24次分量的磁通B24而引起扭矩波動增大的情況。 In addition, according to this embodiment, in a certain state, the teeth 66B and 66B are arranged adjacently between one tooth 66A and the other teeth 66D and 66E in the circumferential direction. At least a portion of 66C is located radially outside the second magnet 42 . In a certain state, by positioning at least part of the teeth 66B and 66C outside the second magnet 42 in the radial direction, the magnetic flux of the second magnet 42 can be utilized to easily move the 24th order component of the magnetic flux B24 from the tooth 66A toward the tooth. 66B, 66C flow appropriately. Therefore, it is more difficult for the magnetic flux B24 of the 24th order component to flow toward the teeth 66D and 66E, which are arranged one tooth away from the tooth 66A. Therefore, in a certain state, it becomes more difficult for the 24th order component magnetic flux B24 to flow toward the portion of the rotor core 20 located radially inward of the teeth 66D and 66E. Therefore, even if the third magnetic flux blocking portions 53a and 53b are provided, the flow of the 24th order component magnetic flux B24 can be made less likely to be obstructed. Therefore, even if the third magnetic flux blocking portions 53a and 53b are provided, it is possible to more reliably suppress an increase in torque ripple caused by the 24th-order component magnetic flux B24.
另外，按照本實施方式，在某個狀態下，隔著第一磁鐵41a配置的一對第一磁通阻隔部51a、51b中位於徑向外側的第一磁通阻隔部51b位於另一個齒66D之遠離第二磁鐵42的周向中心的一側(+θ側)的部分的徑向內側。因此，從齒66D放出的48次分量的磁通B48被第一磁通阻隔部51b遮擋，而難以返回齒66D之遠離第二磁鐵42的周向中心的一側的部分。由此，從齒66D放出的48次分量的磁通B48如圖4所示的磁通B48b那樣，容易返回齒66D接近第二磁鐵42的周向中心的一側(-θ側)的部分。 In addition, according to this embodiment, in a certain state, among the pair of first magnetic flux blocking portions 51a and 51b arranged across the first magnet 41a, the first magnetic flux blocking portion 51b located on the radially outer side is located on the other tooth 66D. The radial inner side of the portion on the side (+ θ side) away from the circumferential center of the second magnet 42 . Therefore, the 48th-order component magnetic flux B48 emitted from the tooth 66D is blocked by the first magnetic flux blocking portion 51 b and becomes difficult to return to the portion of the tooth 66D on the side away from the circumferential center of the second magnet 42 . Thereby, the 48th-order component magnetic flux B48 emitted from the tooth 66D easily returns to the side ( -θ side) of the tooth 66D close to the circumferential center of the second magnet 42, like the magnetic flux B48b shown in FIG. 4 .
此處，在本實施方式中，在某個狀態下，第三磁通阻隔部53a位於齒66D之接近第二磁鐵42的周向中心的一側(-θ側)的部分的徑向內側。因此，能夠藉由第三磁通阻隔部53a適當地抑制從齒66D放出並返回齒66D之接近第二磁鐵42的周向中心 的一側(-θ側)的部分的磁通B48b在轉子鐵芯20的內部向徑向內側較大地環繞的情況。由此，能夠藉由第三磁通阻隔部53a對在齒66D與轉子鐵芯20之間流動的磁通B48b適當地進行整流。因此，能夠更適當地降低扭矩波動。 Here, in this embodiment, in a certain state, the third magnetic flux blocking portion 53 a is located radially inside the portion of the tooth 66D on the side ( -θ side) close to the circumferential center of the second magnet 42 . Therefore, the third magnetic flux blocking portion 53 a can appropriately suppress the magnetic flux B48 b released from the teeth 66D and returned to the portion of the teeth 66D on the side ( -θ side) close to the circumferential center of the second magnet 42 from flowing into the rotor iron. A case where the inside of the core 20 largely surrounds the core 20 inward in the radial direction. Thereby, the magnetic flux B48b flowing between the teeth 66D and the rotor core 20 can be appropriately rectified by the third magnetic flux blocking portion 53a. Therefore, torque ripple can be reduced more appropriately.
另外，例如，在轉子鐵芯20與定子60之間流動的48次分量的磁通B48例如也包含圖4所示的磁通B48c。磁通B48c是從齒66D通過轉子鐵芯20並向與齒66D相鄰的齒66F流動的磁通。磁通B48c例如在從齒66D向轉子鐵芯20內放出之後，向齒66F的傘部63b的周向另一側(-θ側)的端部流動。這樣的磁通B48c較多地流動時，48次分量的磁通B48的周向平衡被破壞，從而扭矩波動容易變大。 In addition, for example, the 48th-order component magnetic flux B48 flowing between the rotor core 20 and the stator 60 also includes the magnetic flux B48c shown in FIG. 4 . The magnetic flux B48c flows from the tooth 66D through the rotor core 20 toward the tooth 66F adjacent to the tooth 66D. For example, the magnetic flux B48c is discharged from the teeth 66D into the rotor core 20 and then flows toward the end of the umbrella portion 63b of the teeth 66F on the other circumferential side ( -θ side). When such a large amount of magnetic flux B48c flows, the circumferential balance of the 48th-order component magnetic flux B48 is destroyed, and the torque ripple tends to increase.
與此相對，本實施方式中轉子鐵芯20具有凹部22a。在某個狀態下，凹部22a配置於比另一個齒66D的周向中心沿周向遠離第二磁鐵42的周向中心的一側(+θ側)。因此，藉由凹部22a，磁通B48c流動的路徑容易變窄。由此，能夠抑制磁通B48c較多地流動，從而能夠抑制48次分量的磁通B48的周向平衡被破壞。因此，能夠進一步降低扭矩波動。 On the other hand, in this embodiment, the rotor core 20 has the recessed portion 22a. In a certain state, the recessed portion 22 a is disposed on a side (+ θ side) that is circumferentially farther from the circumferential center of the second magnet 42 than the circumferential center of the other tooth 66D. Therefore, the path through which the magnetic flux B48c flows is easily narrowed by the recessed portion 22a. This can suppress the magnetic flux B48c from flowing in a large amount, and can suppress the circumferential balance of the 48th-order component of the magnetic flux B48 from being destroyed. Therefore, torque ripple can be further reduced.
另外，按照本實施方式，在某個狀態下，凹部22a的至少一部分位於另一個齒66D的徑向內側。因此，藉由凹部22a，容易適當地使從齒66D放出的磁通B48c流動的路徑變窄，而能進一步抑制磁通B48c較多地流動。因此，能夠進一步降低扭矩波動。 In addition, according to this embodiment, in a certain state, at least a part of the recessed portion 22a is located radially inward of the other tooth 66D. Therefore, the recessed portion 22 a makes it easy to appropriately narrow the path in which the magnetic flux B48 c discharged from the teeth 66D flows, and can further suppress the flow of the magnetic flux B48 c in a large amount. Therefore, torque ripple can be further reduced.
另外，依本實施方式，凹部22a位於一對第一磁通阻隔 部51a、51b中位於徑向外側的第一磁通阻隔部51b的徑向外側。因此，可適當地使凹部22a與第一磁通阻隔部51b的徑向之間變窄，而能更適當地使從齒66D放出的磁通B48c流動的路徑變窄。因此可進一步抑制磁通B48c較多地流動。因此，能夠進一步降低扭矩波動。 In addition, according to this embodiment, the recessed portion 22a is located at a pair of first magnetic flux blocking The radially outer side of the first magnetic flux blocking portion 51b located radially outer among the portions 51a and 51b. Therefore, the radial distance between the recessed portion 22 a and the first magnetic flux blocking portion 51 b can be appropriately narrowed, and the path through which the magnetic flux B48 c discharged from the teeth 66D flows can be narrowed more appropriately. Therefore, the magnetic flux B48c can be further suppressed from flowing in a large amount. Therefore, torque ripple can be further reduced.
利用凹部22b也能夠同樣地得到藉由設置有上述的凹部22a而得到的效果。在本實施方式中，藉由設置有一對凹部22a、22b，能夠更適當地降低扭矩波動。 The effect obtained by providing the above-described recessed portion 22a can also be obtained by using the recessed portion 22b. In this embodiment, by providing a pair of recessed portions 22a and 22b, torque ripple can be reduced more appropriately.
另外，按照本實施方式，第三磁通阻隔部53a、53b的周向尺寸W為0.6mm以上2.1mm以下。藉由使第三磁通阻隔部53a、53b的周向尺寸W為該範圍的數值，可藉由第三磁通阻隔部53a、53b對48次分量的磁通B48b適當地整流。因此，容易更適當地使在齒66D、66E與轉子鐵芯20之間流動的磁通B48b的流動與在齒66A與轉子鐵芯20之間流動的磁通B48a的流動相同。由此，能夠在周向上更適當地降低磁通的流動的偏差，從而能夠更適當地降低扭矩波動。 In addition, according to this embodiment, the circumferential dimension W of the third magnetic flux blocking portions 53a and 53b is 0.6 mm or more and 2.1 mm or less. By setting the circumferential dimension W of the third magnetic flux blocking portions 53a and 53b to a value within this range, the magnetic flux B48b of the 48th order component can be appropriately rectified by the third magnetic flux blocking portions 53a and 53b. Therefore, it is easier to more appropriately make the flow of the magnetic flux B48b flowing between the teeth 66D and 66E and the rotor core 20 the same as the flow of the magnetic flux B48a flowing between the teeth 66A and the rotor core 20 . This can more appropriately reduce deviations in the flow of magnetic flux in the circumferential direction, thereby more appropriately reducing torque ripple.
另外，按照本實施方式，旋轉電機1是三相交流式的旋轉電機，在極數設為N時，槽數為N×6。在這樣的旋轉電機1中，在轉子10與定子60之間流動的磁通包含上述的24次分量的磁通B24那樣的N×3次的磁通分量和上述的48次分量的磁通B48那樣的N×6次的磁通分量。例如，在N=10的情況下，即旋轉電機1為10極60槽的旋轉電機的情況下，在轉子10與定子60之間流 動的磁通包含10×3次，即30次的磁通分量和10×6次，即60次的磁通分量。在這種情況下，藉由設置第三磁通阻隔部53a、53b，與上述的48次分量的磁通B48的情況同樣地，能夠降低因N×6次的磁通分量而產生的扭矩波動，並且，與上述的24次分量的磁通B24的情況同樣地，能夠降低因N×3次的磁通分量而產生的扭矩波動。因此，藉由設置第三磁通阻隔部53a、53b，在極數為N且槽數為N×6的旋轉電機1中，容易適當地得到上述能夠降低扭矩波動的效果。 Furthermore, according to this embodiment, the rotating electrical machine 1 is a three-phase AC rotating electrical machine, and when the number of poles is N, the number of slots is N×6. In such a rotating electrical machine 1 , the magnetic flux flowing between the rotor 10 and the stator 60 includes an N×3-order magnetic flux component such as the above-mentioned 24th-order component magnetic flux B24 and the above-described 48th-order component magnetic flux B48 Such N×6 magnetic flux components. For example, when N=10, that is, when the rotating electrical machine 1 is a rotating electrical machine with 10 poles and 60 slots, the flow between the rotor 10 and the stator 60 The moving magnetic flux contains a 10×3 order magnetic flux component, which is a 30th order magnetic flux component, and a 10×6 order magnetic flux component, which is a 60th order magnetic flux component. In this case, by providing the third magnetic flux blocking portions 53a and 53b, it is possible to reduce the torque ripple caused by the N×6th-order magnetic flux component, similarly to the case of the 48th-order magnetic flux B48 described above. , and similarly to the case of the 24th-order magnetic flux B24 described above, the torque ripple caused by the N×3-order magnetic flux component can be reduced. Therefore, by providing the third magnetic flux blocking portions 53a and 53b, in the rotating electrical machine 1 with N poles and N×6 slots, it is easy to appropriately obtain the above-mentioned effect of reducing torque ripple.
另外，根據本實施方式，線圈65是分散式繞組並且是全距繞組。在線圈65這樣捲繞的旋轉電機1中，在轉子10與定子60之間流動的磁通包含上述的24次分量的磁通B24那樣的N×3次的磁通分量和上述的48次分量的磁通B48那樣的N×6次的磁通分量。在這種情況下，藉由設置第三磁通阻隔部53a、53b，能夠降低因N×6次的磁通分量而導致的扭矩波動，並且能夠降低因N×3次的磁通分量而導致的扭矩波動增大。因此，藉由設置第三磁通阻隔部53a、53b，在極數為N且槽數為N×6的旋轉電機1中，容易適當地得到上述能夠降低扭矩波動的效果。 In addition, according to the present embodiment, the coil 65 is a distributed winding and a full-pitch winding. In the rotating electric machine 1 with the coil 65 wound in this way, the magnetic flux flowing between the rotor 10 and the stator 60 includes an N×3-order magnetic flux component such as the above-mentioned 24th-order component magnetic flux B24 and the above-mentioned 48th-order component. The magnetic flux B48 is an N × 6th order magnetic flux component. In this case, by providing the third magnetic flux blocking portions 53a and 53b, the torque ripple caused by the N×6th order magnetic flux component can be reduced, and the torque ripple caused by the N×3rd order magnetic flux component can be reduced. The torque ripple increases. Therefore, by providing the third magnetic flux blocking portions 53a and 53b, in the rotating electrical machine 1 with N poles and N×6 slots, it is easy to appropriately obtain the above-mentioned effect of reducing torque ripple.
本發明不限於上述的實施方式，在本發明的技術思想的範圍內，也能夠採用其他結構。在上述實施方式中，第三磁通阻隔部構成為設置於隔著一對第一磁鐵的一個而配置的一對第一磁通阻隔部中位於徑向外側的第一磁通阻隔部與一對第二磁通阻隔部中的一個的周向之間以及隔著一對第一磁鐵的另一個而配置的 一對第一磁通阻隔部中位於徑向外側的第一磁通阻隔部與一對第二磁通阻隔部中的另一個的周向之間的雙方，但並不限於此。第三磁通阻隔部只要配置於隔著一對第一磁鐵的一個而配置的一對第一磁通阻隔部中位於徑向外側的第一磁通阻隔部與一對第二磁通阻隔部中的一個的周向之間以及隔著一對第一磁鐵的另一個而配置的一對第一磁通阻隔部中位於徑向外側的第一磁通阻隔部與一對第二磁通阻隔部中的另一個的周向之間中的至少一方即可。也就是說，在上述實施方式中，各磁極部70也可以是僅包含一對第三磁通阻隔部53a、53b中的任意一個的結構。 The present invention is not limited to the above-described embodiment, and other structures can be adopted within the scope of the technical idea of the present invention. In the above-mentioned embodiment, the third magnetic flux blocking portion is configured to be provided between the first magnetic flux blocking portion located on the radially outer side of the pair of first magnetic flux blocking portions arranged with one of the pair of first magnets sandwiched between them. The second magnetic flux blocking portions are arranged between one of the second magnetic flux blocking portions in the circumferential direction and across the other of the pair of first magnets. Both sides between the circumferential direction of the first magnetic flux blocking portion located on the radially outer side of the pair of first magnetic flux blocking portions and the other of the pair of second magnetic flux blocking portions, but are not limited thereto. The third magnetic flux blocking portion only needs to be disposed between the first magnetic flux blocking portion and the pair of second magnetic flux blocking portions located radially outward of the pair of first magnetic flux blocking portions disposed across one of the pair of first magnets. Between the circumferential direction of one of the pair of first magnets and the first magnetic flux blocking portion and the pair of second magnetic flux blocking portions located radially outside of the pair of first magnetic flux blocking portions arranged across the other of the pair of first magnets At least one of the other circumferential directions is sufficient. That is, in the above-described embodiment, each magnetic pole portion 70 may have a structure including only one of the pair of third magnetic flux blocking portions 53a and 53b.
第三磁通阻隔部的形狀無特別限定，例如在沿軸向觀察時，可為橢圓形，也可為多邊形。在第三磁通阻隔部由孔構成的情況下，孔也可以是具有底部者。第三磁通阻隔部亦可藉由在設置於轉子鐵芯的孔內配置樹脂等非磁性體而構成。在第三磁通阻隔部設有多個的情況下，多個第三磁通阻隔部亦可包含彼此形狀不同的第三磁通阻隔部。只要第三磁通阻隔部位於第一磁通阻隔部與第二磁通阻隔部的周向之間，其徑向位置就沒有特別限定。 The shape of the third magnetic flux blocking portion is not particularly limited. For example, when viewed along the axial direction, it may be an elliptical shape or a polygonal shape. When the third magnetic flux blocking portion is formed of a hole, the hole may have a bottom. The third magnetic flux blocking portion may be formed by arranging a non-magnetic material such as resin in a hole provided in the rotor core. When a plurality of third magnetic flux blocking parts are provided, the plurality of third magnetic flux blocking parts may also include third magnetic flux blocking parts having different shapes. As long as the third magnetic flux blocking portion is located between the first magnetic flux blocking portion and the second magnetic flux blocking portion in the circumferential direction, its radial position is not particularly limited.
第三磁通阻隔部也可以在一個第一磁通阻隔部與一個第二磁通阻隔部之間設置有多個。例如，在上述實施方式中，也可以在第一磁通阻隔部51b與第二磁通阻隔部52a的周向之間設置有多個第三磁通阻隔部53a。在該情況下，多個第三磁通阻隔部53a可以沿徑向排列配置，也可以沿周向排列配置。 A plurality of third magnetic flux blocking parts may be provided between one first magnetic flux blocking part and one second magnetic flux blocking part. For example, in the above-described embodiment, a plurality of third magnetic flux blocking portions 53a may be provided between the first magnetic flux blocking portion 51b and the second magnetic flux blocking portion 52a in the circumferential direction. In this case, the plurality of third magnetic flux blocking portions 53a may be arranged in a radial direction or may be arranged in a circumferential direction.
在第二磁鐵的周向中心配置於與某一個齒的周向中心 相同的周向位置的某個狀態下，只要是與某一個齒不同的另一個齒，第三磁通阻隔部就可以位於該另一個齒的徑向內側。在某個狀態下，第三磁通阻隔部可以在周向上位於與某一個齒相鄰配置的齒的徑向內側，也可以在周向上位於與某一個齒隔開兩個以上的齒而配置的齒的徑向內側。第三磁通阻隔部也可以位於該另一個齒的任何部分的徑向內側。 The circumferential center of the second magnet is arranged to be aligned with the circumferential center of a certain tooth. In a certain state of the same circumferential position, as long as it is another tooth different from a certain tooth, the third magnetic flux blocking portion may be located radially inside of the other tooth. In a certain state, the third magnetic flux blocking portion may be positioned radially inside of a tooth arranged adjacent to a certain tooth in the circumferential direction, or may be positioned two or more teeth away from a certain tooth in the circumferential direction. radially inner side of the tooth. The third flux barrier may also be located radially inward of any part of the other tooth.
設置於轉子鐵芯的凹部的形狀沒有特別限定。凹部的數量沒有特別限定。例如，在上述的實施方式的各磁極部70中，凹部22a、22b可以僅設置任意一方，凹部22a、22b也可以設置有三個以上。也可以不設置凹部。 The shape of the recess provided in the rotor core is not particularly limited. The number of recessed portions is not particularly limited. For example, in each magnetic pole portion 70 of the above-described embodiment, only one of the recessed portions 22a and 22b may be provided, or three or more recessed portions 22a and 22b may be provided. The recessed portion may not be provided.
應用本發明的旋轉電機不限於馬達，也可以是發電機。在該情況下，旋轉電機也可以是三相交流式的發電機。旋轉電機的用途沒有特別限定，例如可以搭載於車輛，也可以搭載於車輛以外的設備。旋轉電機的極數和槽數沒有特別限定。在旋轉電機中，線圈可以按照任何捲繞方法構成。以上，在本說明書中，進行了說明的結構可以在彼此不矛盾的範圍內適當地進行組合。 The rotating electric machine to which the present invention is applied is not limited to a motor and may also be a generator. In this case, the rotating electric machine may be a three-phase alternating current generator. The use of the rotating electrical machine is not particularly limited. For example, it may be mounted on a vehicle or may be mounted on equipment other than the vehicle. The number of poles and slots of the rotating electrical machine is not particularly limited. In rotating electrical machines, the coils can be constructed according to any winding method. As mentioned above, the structures described in this specification can be combined appropriately within the range which does not contradict each other.
使用實施例1~4和比較例進行模擬，由此驗證了本發明的有用性。實施例1~4為與上述實施方式的旋轉電機1相同的結構。在實施例1~4中，隔著第三磁通阻隔部而配置的第一磁通阻隔部與第二磁通阻隔部之間的周向的距離L1為5.81mm。在實施例1~4中，轉子鐵芯的半徑r為59.2mm。 Simulations were performed using Examples 1 to 4 and Comparative Examples to verify the usefulness of the present invention. Examples 1 to 4 have the same structure as the rotating electrical machine 1 of the above-mentioned embodiment. In Examples 1 to 4, the circumferential distance L1 between the first magnetic flux blocking portion and the second magnetic flux blocking portion disposed across the third magnetic flux blocking portion was 5.81 mm. In Examples 1 to 4, the radius r of the rotor core is 59.2 mm.
在實施例1中，從轉子鐵芯的外周面到第三磁通阻隔部的中心的徑向上距離L3為2.2mm。在實施例2中，L3為2.6mm。在實施例3中，L3為3.0mm。在實施例4中，L3為3.4mm。 In Example 1, the radial distance L3 from the outer peripheral surface of the rotor core to the center of the third magnetic flux blocking portion is 2.2 mm. In Example 2, L3 is 2.6mm. In Example 3, L3 is 3.0mm. In Example 4, L3 is 3.4mm.
在實施例1中，第三磁通阻隔部的中心的周向位置是相對於設置有該第三磁通阻隔部的磁極部與在該磁極部的周向上相鄰的磁極部之間的周向中心的周向角度為9.2°的位置。以下，將設置有該第三磁通阻隔部的磁極部與在該磁極部的周向上相鄰的磁極部之間的周向中心稱為「磁極部彼此之間的周向中心」。在實施例2中，第三磁通阻隔部的中心的周向位置是相對於磁極部彼此之間的周向中心的周向角度為9.0°的位置。在實施例3中，第三磁通阻隔部的中心的周向位置是相對於磁極部彼此之間的周向中心的周向角度為8.8°的位置。在實施例4中，第三磁通阻隔部的中心的周向位置是相對於磁極部彼此之間的周向中心的周向角度為8.6°的位置。比較例是相對於實施例1~4僅未設置有第三磁通阻隔部這一點不同的結構。 In Embodiment 1, the circumferential position of the center of the third magnetic flux blocking portion is relative to the circumference between the magnetic pole portion in which the third magnetic flux blocking portion is provided and the magnetic pole portion adjacent in the circumferential direction of the magnetic pole portion. The circumferential angle to the center is 9.2°. Hereinafter, the circumferential center between the magnetic pole portion provided with the third magnetic flux blocking portion and the magnetic pole portion adjacent in the circumferential direction of the magnetic pole portion will be referred to as the “circumferential center between the magnetic pole portions.” In Example 2, the circumferential position of the center of the third magnetic flux blocking portion is a position where the circumferential angle with respect to the circumferential center between the magnetic pole portions is 9.0°. In Example 3, the circumferential position of the center of the third magnetic flux blocking portion is a position where the circumferential angle with respect to the circumferential center between the magnetic pole portions is 8.8°. In Example 4, the circumferential position of the center of the third magnetic flux blocking portion is a position where the circumferential angle with respect to the circumferential center between the magnetic pole portions is 8.6°. The comparative example has a structure different from Examples 1 to 4 only in that the third magnetic flux blocking portion is not provided.
在實施例1~4及比較例各自中，藉由模擬求出48次的扭矩波動，其是因48次分量的磁通而產生的扭矩波動。關於實施例1~4，在每次使第三磁通阻隔部的周向的尺寸W變化時，求出48次的扭矩波動。圖6示出這些模擬結果，其中用實線TR1示出實施例1的結果、虛線TR2示出實施例2的結果、點虛線TR3示出實施例3的結果、雙點虛線TR4示出實施例4的結果。 In each of Examples 1 to 4 and the comparative example, the 48th order torque ripple was obtained through simulation, which is the torque ripple caused by the magnetic flux of the 48th order component. Regarding Examples 1 to 4, each time the circumferential dimension W of the third magnetic flux blocking portion was changed, 48 torque ripples were obtained. Figure 6 shows these simulation results, in which the solid line TR1 shows the results of Example 1, the dotted line TR2 shows the results of Example 2, the dotted line TR3 shows the results of Example 3, and the double dotted line TR4 shows the results of Example 4 results.
在圖6中，橫軸表示第三磁通阻隔部的周向的尺寸W〔 mm〕，縱軸表示在各實施例中得到的48次的扭矩波動相對於比較例中得到的48次的扭矩波動比TR。當TR比1.0小時，表示各實施例中得到的48次的扭矩波動較比較例中得到的48次的扭矩波動小。比較例未設置第三磁通阻隔部，因此無論第三磁通阻隔部的周向尺寸W如何，比較例中得到的48次的扭矩波動都恆定。 In FIG. 6 , the horizontal axis represents the circumferential dimension W of the third magnetic flux blocking portion [ mm], the vertical axis represents the torque ripple ratio TR of the 48th order obtained in each example to the 48th order torque ripple obtained in the comparative example. When TR is smaller than 1.0, it means that the 48th torque fluctuation obtained in each example is smaller than the 48th torque fluctuation obtained in the comparative example. Since the third magnetic flux blocking portion is not provided in the comparative example, the 48th order torque ripple obtained in the comparative example is constant regardless of the circumferential dimension W of the third magnetic flux blocking portion.
如圖6中實線TR1所示，確認在實施例1中，在尺寸W為0.6mm以上1.5mm以下的範圍內，可使扭矩波動比TR比1.0小。如圖6中虛線TR2所示，確認在實施例2中，在尺寸W為0.6mm以上2.0mm以下的範圍內，可使扭矩波動比TR比1.0小。如圖6中點虛線TR3所示，確認在實施例3中，在尺寸W為0.6mm以上2.2mm以下的範圍內，可使扭矩波動比TR比1.0小。如圖6中雙點虛線TR4所示，確認在實施例4中，尺寸W為0.8mm以上2.4mm以下的範圍內，可使扭矩波動比TR比1.0小。由此，確認藉由設置第三磁通阻隔部，可降低扭矩波動。 As shown by the solid line TR1 in FIG. 6 , it was confirmed that in Example 1, the torque ripple ratio TR can be made smaller than 1.0 in the range of the dimension W from 0.6 mm to 1.5 mm. As shown by the dotted line TR2 in FIG. 6 , it was confirmed that in Example 2, the torque ripple ratio TR can be made smaller than 1.0 in the range of the dimension W from 0.6 mm to 2.0 mm. As shown by the dotted line TR3 in the middle of FIG. 6 , it was confirmed that in Example 3, the torque ripple ratio TR can be made smaller than 1.0 in the range of the dimension W from 0.6 mm to 2.2 mm. As shown by the two-dot dotted line TR4 in FIG. 6 , it was confirmed that in Example 4, the torque ripple ratio TR can be made smaller than 1.0 when the dimension W is in the range of 0.8 mm to 2.4 mm. From this, it was confirmed that torque ripple can be reduced by providing the third magnetic flux blocking portion.
另外，在實施例1~4各自中，確認扭矩波動比TR有極小值。由此確認對於第三磁通阻隔部的周向尺寸W，扭矩波動有極小值。因此，確認藉由使第三磁通阻隔部的周向尺寸W成為扭矩波動為極小值的值或接近該值的值，可更適當地降低扭矩波動。 In addition, in each of Examples 1 to 4, it was confirmed that the torque ripple ratio TR has a minimum value. From this, it was confirmed that the torque ripple has a minimum value with respect to the circumferential dimension W of the third magnetic flux blocking portion. Therefore, it was confirmed that torque ripple can be reduced more appropriately by setting the circumferential dimension W of the third magnetic flux blocking portion to a value at which the torque ripple becomes a minimum value or a value close to this value.
在實施例1中，例如在第三磁通阻隔部的周向尺寸W約0.9mm的情況下，扭矩波動比TR為極小值。在實施例1中，確認藉由使第三磁通阻隔部的周向尺寸W為包含使TR成為極小值的0.9mm的0.6mm以上1.1mm以下的範圍內，可適當降低扭 矩波動。在實施例1中，在第三磁通阻隔部的周向尺寸W為0.6mm以上1.1mm以下的範圍內，TR為0.5以下。亦即，在實施例1中，確認在第三磁通阻隔部的周向尺寸W為0.6mm以上1.1mm以下的範圍內，與比較例相比，可使扭矩波動降為一半以下。 In Example 1, for example, when the circumferential dimension W of the third magnetic flux blocking portion is approximately 0.9 mm, the torque ripple ratio TR becomes a minimum value. In Example 1, it was confirmed that by setting the circumferential dimension W of the third magnetic flux blocking portion in a range of 0.6 mm to 1.1 mm including 0.9 mm that makes TR a minimum value, the torque can be appropriately reduced. moment fluctuation. In Example 1, TR is 0.5 or less in the range where the circumferential dimension W of the third magnetic flux blocking portion is 0.6 mm or more and 1.1 mm or less. That is, in Example 1, it was confirmed that when the circumferential dimension W of the third magnetic flux blocking portion is in the range of 0.6 mm to 1.1 mm, the torque ripple can be reduced to half or less compared to the comparative example.
在實施例2中，例如在第三磁通阻隔部的周向尺寸W約1.35mm的情況下，扭矩波動比TR為極小值。在實施例2中，確認藉由使第三磁通阻隔部的周向尺寸W為包含使TR成為極小值的約1.35mm的1.0mm以上1.7mm以下的範圍內，可適當降低扭矩波動。在實施例2中，在該周向尺寸W為1.0mm以上1.7mm以下的範圍內，TR為0.5以下。亦即，在實施例2中，確認在第三磁通阻隔部的周向尺寸W為1.0mm以上1.7mm以下的範圍內，與比較例相比，可使扭矩波動降為一半以下。 In Example 2, for example, when the circumferential dimension W of the third magnetic flux blocking portion is approximately 1.35 mm, the torque ripple ratio TR becomes a minimum value. In Example 2, it was confirmed that torque ripple can be appropriately reduced by setting the circumferential dimension W of the third magnetic flux blocking portion within a range of 1.0 mm or more and 1.7 mm or less including approximately 1.35 mm, which makes TR a minimum value. In Example 2, TR is 0.5 or less in the range of the circumferential direction dimension W from 1.0 mm to 1.7 mm. That is, in Example 2, it was confirmed that when the circumferential dimension W of the third magnetic flux blocking portion is in the range of 1.0 mm or more and 1.7 mm or less, the torque ripple can be reduced to less than half compared with the comparative example.
在實施例3中，例如在第三磁通阻隔部的周向尺寸W約1.55mm的情況下，扭矩波動比TR為極小值。在實施例3中，確認藉由使第三磁通阻隔部的周向尺寸W為包含使TR成為極小值的約1.55mm的1.2mm以上1.8mm以下的範圍內，可適當地降低扭矩波動。在實施例3中，在該周向尺寸W為1.2mm以上1.8mm以下的範圍內，TR為0.5以下。亦即，在實施例3中，確認在第三磁通阻隔部的周向尺寸W為1.2mm以上1.8mm以下的範圍內，與比較例相比，可使扭矩波動降為一半以下。 In Example 3, for example, when the circumferential dimension W of the third magnetic flux blocking portion is approximately 1.55 mm, the torque ripple ratio TR becomes a minimum value. In Example 3, it was confirmed that the torque ripple can be appropriately reduced by setting the circumferential dimension W of the third magnetic flux blocking portion within a range of 1.2 mm or more and 1.8 mm or less including about 1.55 mm that makes TR a minimum value. In Example 3, TR is 0.5 or less in the range of the circumferential direction dimension W from 1.2 mm to 1.8 mm. That is, in Example 3, it was confirmed that when the circumferential dimension W of the third magnetic flux blocking portion is in the range of 1.2 mm or more and 1.8 mm or less, the torque ripple can be reduced to less than half compared with the comparative example.
在實施例4中，例如在第三磁通阻隔部的周向尺寸W約1.8mm的情況下，扭矩波動比TR為極小值。在實施例4中，確 認藉由使第三磁通阻隔部的周向尺寸W為包含使TR成為極小值的約1.8mm的1.4mm以上2.1mm以下的範圍內，可適當降低扭矩波動。在實施例4中，在第三磁通阻隔部的周向尺寸W為1.4mm以上2.1mm以下的範圍內，TR為0.5以下。也就是說，在實施例4中，確認該周向尺寸W為1.4mm以上2.1mm以下的範圍內，與比較例相比，可使扭矩波動降為一半以下。實施例4中的扭矩波動比TR的極小值比實施例1~3中的TR的極小值小。 In Example 4, for example, when the circumferential dimension W of the third magnetic flux blocking portion is approximately 1.8 mm, the torque ripple ratio TR becomes a minimum value. In Example 4, it is confirmed that It is considered that torque ripple can be appropriately reduced by setting the circumferential dimension W of the third magnetic flux blocking portion within a range of 1.4 mm or more and 2.1 mm or less including about 1.8 mm, which makes TR a minimum value. In Example 4, TR is 0.5 or less in the range where the circumferential dimension W of the third magnetic flux blocking portion is 1.4 mm or more and 2.1 mm or less. That is, in Example 4, it was confirmed that when the circumferential dimension W is in the range of 1.4 mm or more and 2.1 mm or less, the torque ripple can be reduced to half or less compared to the comparative example. The minimum value of the torque ripple ratio TR in Example 4 is smaller than the minimum value of TR in Examples 1 to 3.
藉由實施例1~4的結果，確認在第三磁通阻隔部的周向的尺寸W為0.6mm以上2.1mm以下左右的範圍內，藉由調整第三磁通阻隔部的中心的徑向位置，容易適當地降低扭矩波動。在第三磁通阻隔部的周向的尺寸W為0.6mm以上2.1mm以下的情況下，第三磁通阻隔部的周向的尺寸W相對於轉子鐵芯的半徑r的比為0.010以上0.035以下。在第三磁通阻隔部的周向的尺寸W為0.6mm以上2.1mm以下的情況下，第三磁通阻隔部的周向的尺寸W相對於第一磁通阻隔部與第二磁通阻隔部之間的周向的距離L1的比為0.10以上0.36以下。由此，確認藉由使尺寸W相對於各值的比在這些範圍內，可適當地降低扭矩波動。 From the results of Examples 1 to 4, it was confirmed that by adjusting the radial direction of the center of the third magnetic flux blocking portion, the circumferential dimension W of the third magnetic flux blocking portion is within a range of about 0.6 mm to 2.1 mm. position, it is easy to appropriately reduce torque ripple. When the circumferential dimension W of the third magnetic flux blocking portion is 0.6 mm or more and 2.1 mm or less, the ratio of the circumferential dimension W of the third magnetic flux blocking portion to the radius r of the rotor core is 0.010 or more and 0.035. the following. When the circumferential dimension W of the third magnetic flux blocking part is 0.6 mm or more and 2.1 mm or less, the circumferential dimension W of the third magnetic flux blocking part is smaller than the first magnetic flux blocking part and the second magnetic flux blocking part. The ratio of the circumferential distance L1 between the parts is 0.10 or more and 0.36 or less. From this, it was confirmed that torque ripple can be appropriately reduced by setting the ratio of the dimension W to each value within these ranges.
根據實施例1~4的結果，確認隨著從轉子鐵芯的外周面到第三磁通阻隔部的中心的徑向的距離L3變大，在扭矩波動比TR取極小值的情況下的第三磁通阻隔部的周向尺寸W變大。也就是說，確認藉由調整距離L3，能夠對可適當地降低扭矩波動的第三磁通阻隔部的周向的尺寸W的範圍進行調整。 According to the results of Examples 1 to 4, it was confirmed that as the radial distance L3 from the outer circumferential surface of the rotor core to the center of the third magnetic flux blocking portion increases, when the torque ripple ratio TR takes a minimum value, the The circumferential dimension W of the three magnetic flux blocking parts becomes larger. That is, it was confirmed that by adjusting the distance L3, the range of the circumferential dimension W of the third magnetic flux blocking portion that can appropriately reduce the torque ripple can be adjusted.
在實施例2、3及4中，確認在第三磁通阻隔部的周向尺寸W為1.38mm以上1.7mm以下的情況下，扭矩波動比TR為0.5以下。在實施例2、3及4中，從轉子鐵芯的外周面到第三磁通阻隔部的中心的徑向的距離L3為2.6mm以上3.4mm以下。也就是說，確認在從轉子鐵芯的外周面到第三磁通阻隔部的中心的徑向的距離L3為2.6mm以上3.4mm以下，並且第三磁通阻隔部的周向尺寸W為1.38mm以上1.7mm以下的情況下，可適當地降低扭矩波動。如上所述，確認了本發明的有用性。 In Examples 2, 3, and 4, it was confirmed that when the circumferential dimension W of the third magnetic flux blocking portion is 1.38 mm or more and 1.7 mm or less, the torque ripple ratio TR is 0.5 or less. In Examples 2, 3, and 4, the radial distance L3 from the outer peripheral surface of the rotor core to the center of the third magnetic flux blocking portion is 2.6 mm or more and 3.4 mm or less. That is, it was confirmed that the radial distance L3 from the outer peripheral surface of the rotor core to the center of the third magnetic flux blocking portion is 2.6 mm or more and 3.4 mm or less, and the circumferential dimension W of the third magnetic flux blocking portion is 1.38 mm or more and 1.7mm or less, the torque ripple can be appropriately reduced. As described above, the usefulness of the present invention was confirmed.
10：轉子 20：轉子鐵芯 22a、22b：凹部 31a、31b：第一收納孔 31c：第一收納孔31a的第一直線部 31d：第一收納孔31a的內端部 31e：第一收納孔31a的外端部 31f：第一收納孔31b的第一直線部 31g：第一收納孔31b的內端部 31h：第一收納孔31b的外端部 32：第二收納孔 32a：第二收納孔32的第二直線部 32b、32c：第二收納孔32的端部 41a、41b：第一磁鐵 42：第二磁鐵 51a、51b、51c、51d：第一磁通阻隔部 52a、52b：第二磁通阻隔部 53a、53b：第三磁通阻隔部 60：定子 61：定子鐵芯 62：鐵芯背部 63、66A、66B、66C、66D、66E、66F：齒 63a：齒的基部 63b：齒的傘部 70N：磁極部 IL1：磁極中心線 IL2、IL4：齒中心線 IL3、IL5：假想線 IL6、IL7：假想曲線 N、S：磁極 W：第三磁通阻隔部53a、53b的周向的尺寸 θ：周向 10: Rotor 20: Rotor cores 22a, 22b: Recessed portions 31a, 31b: First accommodation hole 31c: First linear portion 31d of the first accommodation hole 31a: Inner end portion 31e of the first accommodation hole 31a: First accommodation hole 31a The outer end portion 31f: the first linear portion 31g of the first storage hole 31b: the inner end portion 31h of the first storage hole 31b: the outer end portion 32 of the first storage hole 31b: the second storage hole 32a: the second storage hole 32 Second linear portions 32b, 32c: End portions 41a, 41b of the second storage hole 32: First magnet 42: Second magnets 51a, 51b, 51c, 51d: First magnetic flux blocking portions 52a, 52b: Second magnets Flow blocking parts 53a, 53b: Third magnetic flux blocking part 60: Stator 61: Stator core 62: Core back 63, 66A, 66B, 66C, 66D, 66E, 66F: Teeth 63a: Base of teeth 63b: Teeth Umbrella part 70N: Magnetic pole part IL1: Magnetic pole center line IL2, IL4: Tooth center line IL3, IL5: Virtual line IL6, IL7: Virtual curve N, S: Magnetic pole W: Circumferential direction of third magnetic flux blocking parts 53a, 53b Dimension θ : circumferential direction
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010082438A1 (en) * | 2009-01-14 | 2010-07-22 | 有限会社クラ技術研究所 | Rotary electric machine system having variable magnetic flux |
| JP2017201871A (en) * | 2016-03-25 | 2017-11-09 | ヴァレオ エキプマン エレクトリク モトゥール | Rotary electric machine with ratio of dimension minimizing torque ripple |
| WO2018159181A1 (en) * | 2017-02-28 | 2018-09-07 | 日立オートモティブシステムズ株式会社 | Rotating electric machine rotor and rotating electric machine equipped with same |
| US20200059122A1 (en) * | 2017-03-30 | 2020-02-20 | Nidec Corporation | Rotor and motor |
| JP2020156130A (en) * | 2019-03-18 | 2020-09-24 | 日立金属株式会社 | Rotary electric machine |
| TW202119734A (en) * | 2019-07-04 | 2021-05-16 | 日商山葉發動機股份有限公司 | Electric machine and field portion |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010082438A1 (en) * | 2009-01-14 | 2010-07-22 | 有限会社クラ技術研究所 | Rotary electric machine system having variable magnetic flux |
| JP2017201871A (en) * | 2016-03-25 | 2017-11-09 | ヴァレオ エキプマン エレクトリク モトゥール | Rotary electric machine with ratio of dimension minimizing torque ripple |
| WO2018159181A1 (en) * | 2017-02-28 | 2018-09-07 | 日立オートモティブシステムズ株式会社 | Rotating electric machine rotor and rotating electric machine equipped with same |
| US20200059122A1 (en) * | 2017-03-30 | 2020-02-20 | Nidec Corporation | Rotor and motor |
| JP2020156130A (en) * | 2019-03-18 | 2020-09-24 | 日立金属株式会社 | Rotary electric machine |
| TW202119734A (en) * | 2019-07-04 | 2021-05-16 | 日商山葉發動機股份有限公司 | Electric machine and field portion |
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