JPH08340651A - Permanent magnet, and permanent magnet rotating machine - Google Patents
Permanent magnet, and permanent magnet rotating machineInfo
- Publication number
- JPH08340651A JPH08340651A JP7144345A JP14434595A JPH08340651A JP H08340651 A JPH08340651 A JP H08340651A JP 7144345 A JP7144345 A JP 7144345A JP 14434595 A JP14434595 A JP 14434595A JP H08340651 A JPH08340651 A JP H08340651A
- Authority
- JP
- Japan
- Prior art keywords
- permanent magnet
- magnetic
- electric machine
- magnet type
- magnetic pole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
- H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/02—Details of the magnetic circuit characterised by the magnetic material
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、永久磁石及び永久磁石
形回転電機に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a permanent magnet and a permanent magnet type rotary electric machine.
【０００２】[0002]
【従来の技術】最近の永久磁石材料の進歩に伴い、特に
異方性希土類焼結磁石などのように、優れた高磁束密度
特性と高保磁力特性を備えた材料が開発されている。こ
のような高性能磁石の出現は、これまで永久磁石の用い
られなかった分野への採用を可能とした。2. Description of the Related Art With the recent progress in permanent magnet materials, materials having excellent high magnetic flux density characteristics and high coercive force characteristics, such as anisotropic rare earth sintered magnets, have been developed. The advent of such high-performance magnets has enabled them to be applied to fields where permanent magnets have not been used until now.
【０００３】例えば、大形の永久磁石式電動機はその一
例であるが、小形化の要請に応えるために、高磁束密度
特性と、温度の上昇及び電機子反作用による反磁界に対
しての長期安定性が要求されている。For example, a large permanent magnet type electric motor is one example, but in order to meet the demand for downsizing, it has high magnetic flux density characteristics and long-term stability against demagnetizing field due to temperature rise and armature reaction. Sex is required.
【０００４】これまでの永久磁石の特性では、機器の小
形化が難しく、また、初期の特性を長期間にわたって安
定して維持することが困難であったが、最近の高性能の
希土類磁石は、その高磁束密度特性によって電気機器の
小形化を可能とし、さらに、高保磁力特性によって反磁
界による磁束量の低下をわずかな値に抑えることができ
る。With the characteristics of permanent magnets up to now, it has been difficult to miniaturize the equipment, and it has been difficult to maintain the initial characteristics stably over a long period of time. However, recent high-performance rare earth magnets are The high magnetic flux density characteristic enables downsizing of electric equipment, and the high coercive force characteristic can suppress the decrease in the amount of magnetic flux due to the demagnetizing field to a small value.
【０００５】[0005]
【発明が解決しようとする課題】ところが、永久磁石の
特性のなかの磁束密度と保磁力とは、一般に相反する特
性である。すなわち、高磁束密度特性を重視して材料を
選定すると、保磁力はある程度犠牲とせざるを得ず、一
方、高保磁力を狙って開発された材料は、通常、磁束密
度特性が劣っている。However, among the characteristics of the permanent magnet, the magnetic flux density and the coercive force are generally contradictory characteristics. That is, if materials are selected with an emphasis on high magnetic flux density characteristics, the coercive force must be sacrificed to some extent, while materials developed aiming for high coercive force usually have poor magnetic flux density characteristics.
【０００６】さらに、最も優れた磁気特性を示すニオブ
・鉄・ホウ素（以下、Ｎｂ・Ｆｅ・Ｂと表わす）系の永
久磁石は、適用された電気機器の温度が上昇すると、保
磁力が著しく低下するという特性を有している。Furthermore, the permanent magnet of niobium / iron / boron (hereinafter referred to as Nb / Fe / B) system, which exhibits the most excellent magnetic characteristics, remarkably lowers the coercive force when the temperature of the applied electric equipment rises. It has the property of
【０００７】また、磁気特性は十分に要求を満たしてい
るが、機械的特性においてきわめて脆く、着磁後の永久
磁石を磁気回路に組込む工程において、大きな力で吸着
したときの衝撃により、破損しやすく、組立上の課題と
なる材料も多い。Further, although the magnetic properties sufficiently satisfy the requirements, they are extremely fragile in mechanical properties and are damaged by the impact when they are attracted with a large force in the process of incorporating the magnetized permanent magnet into the magnetic circuit. It is easy, and there are many materials that pose assembly problems.
【０００８】また、永久磁石の使用上の課題としては、
高い保磁力の材料は、一般に着磁が難しいという点があ
げられる。特に、磁気回路を組立ててからの着磁は困難
である。Further, as a problem in using the permanent magnet,
A material having a high coercive force is generally difficult to magnetize. In particular, it is difficult to magnetize the magnetic circuit after it is assembled.
【０００９】このように、高性能永久磁石を適用するう
えでの課題は、前述した高磁束密度と磁束量の長期安定
性をいかに両立させ、また、磁気特性と機械的特性をい
かに両立させ、さらに、長期安定性と着磁のしやすさと
をいかに両立させるかという点にある。As described above, the problem in applying the high-performance permanent magnet is how to achieve both the above-mentioned high magnetic flux density and long-term stability of the amount of magnetic flux, and how to achieve both magnetic properties and mechanical properties. Another point is how to achieve both long-term stability and ease of magnetization.
【００１０】したがって、本発明の第１の目的は、長期
にわたって、高い磁束密度と保磁力を維持することので
きる永久磁石及び永久磁石形回転電機を得ることであ
り、第２の目的は、組立上の課題を解決することのでき
る永久磁石形回転電機を得ることである。Therefore, a first object of the present invention is to obtain a permanent magnet and a permanent magnet type rotary electric machine capable of maintaining a high magnetic flux density and a coercive force for a long period of time, and a second object thereof is to assemble. An object is to obtain a permanent magnet type rotating electric machine that can solve the above problems.
【００１１】[0011]
【課題を解決するための手段】請求項１に記載の発明の
永久磁石は、高磁束密度磁性部とこの高磁束密度磁性部
の両端に設けられた高保磁力磁性部を備えたことを特徴
とする。A permanent magnet according to the present invention comprises a high magnetic flux density magnetic portion and a high coercive force magnetic portion provided at both ends of the high magnetic flux density magnetic portion. To do.
【００１２】また、請求項２に記載の発明の永久磁石
は、高磁束密度磁性部とこの高磁束密度磁性部の両端に
設けられた耐熱磁性部を備えたことを特徴とする。Further, the permanent magnet according to the second aspect of the present invention is characterized by including a high magnetic flux density magnetic portion and heat resistant magnetic portions provided at both ends of the high magnetic flux density magnetic portion.
【００１３】また、請求項３に記載の発明の永久磁石形
回転電機は、継鉄に等間隔に突設された複数の高磁束密
度磁性磁極と、この高磁束密度磁性磁極の先端に固定さ
れる高保持力磁極を備えたことを特徴とする。Further, in the permanent magnet type rotating electric machine according to the third aspect of the invention, a plurality of high magnetic flux density magnetic magnetic poles protruding from the yoke at equal intervals are fixed to the tip of the high magnetic flux density magnetic magnetic pole. It is characterized by having a high holding force magnetic pole.
【００１４】また、請求項４に記載の発明の永久磁石形
回転電機は、継鉄に等間隔に突設された複数の高磁束密
度磁性磁極と、この高磁束密度磁性磁極の円周方向の端
部に固定される高保持力磁極を備えたことを特徴とす
る。Further, in the permanent magnet type rotating electric machine according to the invention described in claim 4, a plurality of high magnetic flux density magnetic poles projecting from the yoke at equal intervals and in the circumferential direction of the high magnetic flux density magnetic poles. It is characterized by having a high coercive force magnetic pole fixed to an end portion.
【００１５】また、請求項５に記載の発明の永久磁石形
回転電機は、継鉄に等間隔に突設された複数の高磁束密
度磁性磁極と、この高磁束密度磁性磁極の先端に固定さ
れる耐熱性磁極を備えたことを特徴とする。Further, in the permanent magnet type rotating electric machine according to the invention described in claim 5, a plurality of high magnetic flux density magnetic magnetic poles projecting from the yoke at equal intervals are fixed to the tip of the high magnetic flux density magnetic magnetic pole. It is characterized by having a heat resistant magnetic pole.
【００１６】また、請求項６に記載の発明の永久磁石形
回転電機は、継鉄に等間隔に突設された複数の高磁束密
度磁性磁極と、この高磁束密度磁性磁極の円周方向の端
部に固定される耐熱性磁極を備えたことを特徴とする。According to the sixth aspect of the present invention, in the permanent magnet type rotating electric machine, a plurality of high magnetic flux density magnetic poles projecting from the yoke at equal intervals and the high magnetic flux density magnetic poles in the circumferential direction. It is characterized in that it has a heat-resistant magnetic pole fixed to the end.
【００１７】また、請求項７に記載の発明の永久磁石形
回転電機は、継鉄に等間隔に突設された複数の低抵抗磁
性磁極と、この低抵抗磁性磁極の先端に固定される高抵
抗磁性磁極を備えたことを特徴とする。According to a seventh aspect of the present invention, in the permanent magnet type rotating electric machine, a plurality of low resistance magnetic magnetic poles are provided on the yoke so as to project at equal intervals, and a high magnetic pole fixed to the tips of the low resistance magnetic magnetic poles. It is characterized by having a resistance magnetic pole.
【００１８】また、請求項８に記載の発明の永久磁石形
回転電機は、少なくとも外面側が弧状に形成された複数
の磁極板を軸方向に絶縁接着剤で接合し磁極を形成した
ことを特徴とする。Further, the permanent magnet type rotating electric machine of the invention described in claim 8 is characterized in that a plurality of magnetic pole plates, at least the outer surfaces of which are formed in an arc shape, are axially joined with an insulating adhesive to form magnetic poles. To do.
【００１９】また、請求項９に記載の発明の永久磁石形
回転電機は、軸方向の端部の磁極板を高強度磁性材とし
たことを特徴とする。また、請求項10に記載の発明の永
久磁石形回転電機は、短冊状の複数の磁極板を円周方向
に絶縁接着剤で接合し磁極を形成したことを特徴とす
る。Further, the permanent magnet type rotating electric machine according to the invention of claim 9 is characterized in that the magnetic pole plate at the end portion in the axial direction is made of a high strength magnetic material. The permanent magnet type rotating electric machine of the invention described in claim 10 is characterized in that a plurality of strip-shaped magnetic pole plates are circumferentially joined with an insulating adhesive to form magnetic poles.
【００２０】また、請求項11に記載の発明の永久磁石形
回転電機は、円周方向の端部の磁極板を高保磁力磁極板
としたことを特徴とする。また、請求項12に記載の発明
の永久磁石形回転電機は、円周方向の端部の磁極板を高
強度磁性材としたことを特徴とする。The permanent magnet type rotating electric machine according to the invention of claim 11 is characterized in that the magnetic pole plates at the ends in the circumferential direction are high coercive force magnetic pole plates. Further, the permanent magnet type rotating electric machine according to the invention of claim 12 is characterized in that the magnetic pole plates at the ends in the circumferential direction are made of a high-strength magnetic material.
【００２１】また、請求項13に記載の発明の永久磁石形
回転電機は、継鉄に等間隔に突設された複数の低強度磁
極と、この低強度磁極の軸方向の端部に設けられた高強
度磁極を備えたことを特徴とする。Further, in the permanent magnet type rotating electric machine of the invention described in claim 13, a plurality of low-strength magnetic poles projecting from the yoke at equal intervals are provided, and axially end portions of the low-strength magnetic poles are provided. It is characterized by having a high strength magnetic pole.
【００２２】また、請求項14に記載の発明の永久磁石形
回転電機は、継鉄に等間隔に突設された複数の低強度磁
極と、この低強度磁極の円周方向の端部に設けられた高
強度磁極を備えたことを特徴とする。According to a fourteenth aspect of the present invention, in the permanent magnet type rotating electric machine, a plurality of low-strength magnetic poles projecting from the yoke at equal intervals are provided, and the low-strength magnetic poles are provided at end portions in the circumferential direction. It is characterized by having a high strength magnetic pole.
【００２３】また、請求項15に記載の発明の永久磁石形
回転電機は、継鉄に等間隔に突設された複数の高強度磁
極板と、この高強度磁極板の先端に設けられた低強度磁
極を備えたことを特徴とする。さらに、請求項16に記載
の発明の永久磁石形回転電機は、永久磁石形回転電機を
永久磁石形電動機としたことを特徴とする。According to the fifteenth aspect of the present invention, in the permanent magnet type rotating electric machine, a plurality of high-strength magnetic pole plates projecting equidistantly from the yoke and a low-strength magnetic pole plate provided at the tip of the high-strength magnetic pole plate. It is characterized by having a strong magnetic pole. Further, the permanent magnet type rotating electric machine of the invention described in claim 16 is characterized in that the permanent magnet type rotating electric machine is a permanent magnet type electric motor.
【００２４】[0024]
【作用】請求項１に記載の発明においては、強度の大な
る反磁界が印加される永久磁石の両端は、この両端に設
けられた高保磁力磁性部によって、反磁界による磁束の
減少が緩和される。According to the invention described in claim 1, at both ends of the permanent magnet to which a strong demagnetizing field is applied, the reduction of the magnetic flux due to the demagnetizing field is alleviated by the high coercive force magnetic portions provided at the both ends. It
【００２５】また、請求項２に記載の発明においては、
渦電流損失が大で高温となる永久磁石の両端は、この両
端に設けられた耐熱磁性部によって、温度上昇による保
磁力の減少が緩和される。Further, in the invention described in claim 2,
At both ends of the permanent magnet where the eddy current loss is large and the temperature becomes high, the heat resistant magnetic portions provided at the both ends alleviate the decrease in the coercive force due to the temperature rise.
【００２６】また、請求項３に記載の発明においては、
強度の大なる反磁界が印加される磁極の先端は、この先
端に設けられた高保磁力磁性部によって、反磁界による
磁束の減少が緩和される。Further, in the invention described in claim 3,
At the tip of the magnetic pole to which a strong demagnetizing field is applied, the reduction of the magnetic flux due to the demagnetizing field is alleviated by the high coercive force magnetic portion provided at this tip.
【００２７】また、請求項４に記載の発明においては、
強度の大なる反磁界が印加される磁極の円周方向の両端
は、この両端に設けられた高保磁力磁性部によって、反
磁界による磁束の減少が緩和される。Further, in the invention described in claim 4,
At both ends in the circumferential direction of the magnetic pole to which a strong demagnetizing field is applied, the reduction of the magnetic flux due to the demagnetizing field is alleviated by the high coercive force magnetic portions provided at the both ends.
【００２８】また、請求項５に記載の発明においては、
渦電流損失が大で高温となる磁極の先端は、この先端に
固定される耐熱性磁極によって、温度上昇による保磁力
の減少が緩和される。Further, in the invention described in claim 5,
At the tip of the magnetic pole where the eddy current loss is large and the temperature becomes high, the heat-resistant magnetic pole fixed to this tip alleviates the decrease in coercive force due to temperature rise.
【００２９】また、請求項６に記載の発明においては、
渦電流損失が大で高温となる磁極の円周方向の端部は、
この端部に固定される耐熱性磁極によって、温度上昇に
よる保磁力の減少が緩和される。In the invention described in claim 6,
The ends of the magnetic poles in the circumferential direction, which have high eddy current loss and high temperature,
The heat-resistant magnetic pole fixed to this end portion alleviates the decrease in coercive force due to temperature rise.
【００３０】また、請求項７に記載の発明においては、
誘起起電力が発生する磁極の先端は、この先端に固定さ
れた高抵抗磁性磁極によって、渦電流が抑制される。In the invention described in claim 7,
At the tip of the magnetic pole where the induced electromotive force is generated, the eddy current is suppressed by the high resistance magnetic pole fixed to this tip.
【００３１】また、請求項８に記載の発明においては、
誘起起電力が発生する磁極は、軸方向に重ねられた磁極
板の間の絶縁接着剤によって、渦電流損失が抑制され
る。Further, in the invention described in claim 8,
Eddy current loss of the magnetic pole in which the induced electromotive force is generated is suppressed by the insulating adhesive between the magnetic pole plates that are stacked in the axial direction.
【００３２】また、請求項９に記載の発明においては、
組み込まれる継鉄は、磁極の軸方向の端部に設けられた
高強度材料によって、組立時の接触による損傷が防止さ
れる。In the invention described in claim 9,
Due to the high-strength material provided at the axial ends of the magnetic poles, the incorporated yoke is prevented from damage due to contact during assembly.
【００３３】また、請求項10に記載の発明においては、
誘起起電力が発生する磁極は、円周方向に重ねられた磁
極板の間の絶縁接着剤によって、渦電流損失が抑制され
る。また、請求項11に記載の発明においては、強度の大
なる反磁界が印加される磁極の円周方向の端部は、この
端部に設けられた高保磁力磁性板によって、反磁界によ
る磁束の減少が緩和される。According to the invention of claim 10,
Eddy current loss is suppressed in the magnetic pole in which the induced electromotive force is generated by the insulating adhesive between the magnetic pole plates that are stacked in the circumferential direction. Further, in the invention of claim 11, the circumferential end portion of the magnetic pole to which a strong demagnetizing field is applied has a high coercive force magnetic plate provided at this end portion, The decrease is moderated.
【００３４】また、請求項12に記載のは発明において
は、組み込まれる継鉄の磁極は、この磁極の円周方向の
端部に設けられた高強度材料によって、組立時の接触に
よる損傷が防止されるとともに、各磁極板の間の絶縁接
着剤によって、渦電流損失が減少する。Further, in the invention according to claim 12, the magnetic pole of the yoke to be incorporated is prevented from being damaged by contact at the time of assembly by the high-strength material provided at the circumferential end portion of the magnetic pole. In addition, the insulating adhesive between the pole plates reduces eddy current loss.
【００３５】また、請求項13に記載の発明においては、
組み込まれた継鉄の磁極は、この磁極に突設された低強
度磁極の軸方向の端部に設けられた高強度磁極によって
組立時の接触による損傷が防止される。In the invention described in claim 13,
The magnetic pole of the built-in yoke is prevented from being damaged due to contact at the time of assembly by the high-strength magnetic pole provided at the axial end of the low-strength magnetic pole projecting from the magnetic pole.
【００３６】また、請求項14に記載の発明においては、
組み込まれる継鉄の磁極は、この磁極の円周方向の端部
に設けられた高強度磁極によって、固定子との接触によ
る損傷が防止される。Further, in the invention described in claim 14,
The built-in yoke magnetic poles are prevented from being damaged by contact with the stator by the high-strength magnetic poles provided at the circumferential ends of the magnetic poles.
【００３７】また、請求項15に記載の発明においては、
組立時に継鉄に固定される磁極は、この磁極の基部に設
けられた高強度磁極板によって、組立時の接触による損
傷が防止される。According to the invention of claim 15,
The magnetic pole fixed to the yoke during assembly is prevented from damage due to contact during assembly by the high-strength magnetic pole plate provided at the base of the magnetic pole.
【００３８】[0038]
【実施例】以下、本発明の永久磁石及び永久磁石形回転
電機の一実施例を図面を参照して説明する。図１は、本
発明の永久磁石の第１の実施例である円柱形の永久磁石
を示す斜視図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a permanent magnet and a permanent magnet type rotary electric machine of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a cylindrical permanent magnet that is a first embodiment of the permanent magnet of the present invention.
【００３９】この永久磁石は、発明者が供試品として製
作したもので、直径10mm、全長が28mmで、２種類の磁石
材料から構成されている。中央部に位置するＮｄ−Ｆｅ
−Ｂ系の高磁束密度磁石１は、長さ20mmで、1.204 Ｔと
いう高い残留磁束密度を持つ一方、保磁力(iHc) の値
は、956kA/m にとどまる。This permanent magnet was manufactured by the inventor as a sample, and has a diameter of 10 mm and a total length of 28 mm, and is composed of two kinds of magnet materials. Nd-Fe located in the center
The −B system high magnetic flux density magnet 1 has a length of 20 mm and a high residual magnetic flux density of 1.204 T, while the coercive force (iHc) value remains at 956 kA / m.
【００４０】また、両端に接合された高保磁力磁石２
は、長さが４mmで高磁束密度磁石１と同様にＮｄ−Ｆｅ
−Ｂ系ではあるが、1870kA/mの極めて高い保磁力(iHc)
を有する一方、残留磁束密度の値はやや低く1.091 Ｔで
ある。Further, the high coercive force magnet 2 joined at both ends
Has a length of 4 mm and is similar to the high magnetic flux density magnet 1 in Nd-Fe.
-B system, but extremely high coercive force (iHc) of 1870 kA / m
On the other hand, the value of the residual magnetic flux density is 1.091 T, which is rather low.
【００４１】図１において、実線の矢印Ａで示す方向に
磁化される場合には、左右の両端に磁極が生じることに
より、破線の矢印Ｂで示すような反磁界が生じ、この反
磁界が永久磁石を減磁させる。この場合、磁石の各部分
における反磁界の大きさは一様ではない。すなわち、左
右の端部において大きく、中央部においては小さい。In FIG. 1, when magnetized in the direction indicated by solid line arrow A, demagnetizing fields as indicated by broken line arrow B occur due to the generation of magnetic poles at the left and right ends, and this demagnetizing field is permanent. Demagnetize the magnet. In this case, the magnitude of the demagnetizing field in each part of the magnet is not uniform. That is, it is large at the left and right ends and small at the center.
【００４２】図２に、このような永久磁石の内部の反磁
界の強度の分布曲線を示す。図２に示すように、端部で
は、中央部と比べてきわめて強い反磁界が生じて、通常
はこの反磁界によって磁石が減磁されるが、本実施例の
永久磁石は、反磁界の大きな両端に高保磁力材料２を用
いることで、減磁に対する安定性が向上する。FIG. 2 shows a distribution curve of the demagnetizing field strength inside such a permanent magnet. As shown in FIG. 2, an extremely strong demagnetizing field is generated at the ends as compared with the central part, and the magnet is usually demagnetized by this demagnetizing field. However, the permanent magnet of this embodiment has a large demagnetizing field. By using the high coercive force material 2 on both ends, the stability against demagnetization is improved.
【００４３】このように構成された永久磁石に対して、
発明者は、 150℃の温度で１時間維持したが、内部の各
部の磁束密度の低下はわずか３％以内にとどまった。一
方、両端に高保磁材料２が接合されてなくて、高磁束密
度磁石１のみで構成した永久磁石においては、図３のグ
ラフに示すように、磁束密度の低下は端部において１割
を超えた。したがって、本実施例の永久磁石は、端部の
磁束密度の低下を大幅に防ぐことができる。With respect to the permanent magnet thus constructed,
The inventor maintained the temperature of 150 ° C. for 1 hour, but the decrease in the magnetic flux density of each internal part was within 3%. On the other hand, as shown in the graph of FIG. 3, the decrease in the magnetic flux density exceeds 10% at the end of the permanent magnet that is composed of only the high magnetic flux density magnet 1 without the high coercive material 2 bonded to both ends. It was Therefore, the permanent magnet of this embodiment can largely prevent a decrease in the magnetic flux density at the ends.
【００４４】図４は、本発明の永久磁石の第２の実施例
を示す斜視図で、図１に対応する図である。図４におい
て、図１と異なるところは、両側の高保磁力磁石２Ａに
はＳｍ2 Ｃｏ17系耐熱性磁石が採用され、保持力(iHc)
の値は、 150℃において1184kA/mと極めて高く、常温で
の残留磁束密度の値は、1.065 Ｔを示す材料を接合して
いる。FIG. 4 is a perspective view showing a second embodiment of the permanent magnet of the present invention and corresponds to FIG. In Fig. 4, the difference from Fig. 1 is that the high coercive force magnets 2A on both sides are Sm 2 Co17 series heat resistant magnets, and the coercive force (iHc)
The value of is extremely high at 1184 kA / m at 150 ° C, and the materials having a residual magnetic flux density of 1.065 T at room temperature are joined.
【００４５】このように構成された永久磁石において
も、反磁界の大きな部位に耐熱性の優れた高保持力磁石
２Ａを用いることで、温度上昇後においても保持力(iH
c) の値を大きく維持することができ、減磁に対する安
定性を大きく改善することができる。Also in the permanent magnet having such a structure, by using the high coercive force magnet 2A having excellent heat resistance in a portion having a large demagnetizing field, the coercive force (iH
The value of c) can be maintained large, and the stability against demagnetization can be greatly improved.
【００４６】図５は、本発明の永久磁石形回転電機の第
１の実施例を示す部分斜視図で、永久磁石形電動機のロ
ータに適用した場合を示す図である。図５において、磁
極４は、高保磁力永久磁石２Ｂが高磁束密度永久磁石１
Ａの先端に接合され、空隙側には弧状に形成された高保
磁力永久磁石２Ｂが位置し、また継鉄３と接する側に
は、同じく、弧状に形成された高磁束密度永久磁石１Ａ
が固定されている。FIG. 5 is a partial perspective view showing a first embodiment of the permanent magnet type rotary electric machine of the present invention, and is a diagram showing a case where it is applied to a rotor of a permanent magnet type electric motor. In FIG. 5, the magnetic pole 4 has a high coercive force permanent magnet 2B and a high magnetic flux density permanent magnet 1
A high coercive force permanent magnet 2B, which is joined to the tip of A and is formed in an arc shape on the side of the air gap, and a high magnetic flux density permanent magnet 1A, which is also formed in an arc shape, on the side in contact with the yoke 3.
Has been fixed.
【００４７】このように構成された永久磁石形回転電機
においては、図３のグラフで説明した永久磁石と同様
に、端部に位置する高保持力永久磁石２Ｂによって、内
部の磁束密度の低下を抑えることができる。In the permanent magnet type rotating electric machine configured as described above, as in the permanent magnet explained in the graph of FIG. 3, the high coercive force permanent magnets 2B located at the ends reduce the internal magnetic flux density. Can be suppressed.
【００４８】図６は、本発明の永久磁石形回転電機の第
２の実施例を示す部分斜視図で、軟磁性材料の磁極片５
を有するロータに適用した場合を示し、図１で示した実
施例と同様に、空隙側すなわち磁極片５と磁極胴の間に
高保磁力永久磁石２Ｃが介在し、また継鉄３と接する側
には、高磁束密度磁石１Ｂが設けられている。FIG. 6 is a partial perspective view showing a second embodiment of the permanent magnet type rotating electric machine of the present invention.
In the same manner as the embodiment shown in FIG. 1, the high coercive force permanent magnet 2C is interposed between the pole piece 5 and the pole body, and the side where the yoke 3 is in contact is shown. Is provided with a high magnetic flux density magnet 1B.
【００４９】このような磁極が形成された永久磁石形回
転電機においては、永久磁石の空隙に面した位置での反
磁界が最も大きく、逆に透磁率の高い継鉄３と接する位
置での反磁界は小さい。したがって、反磁界の大きな空
隙側部分を高保磁力永久磁石２Ｃとすることによって、
大きな反磁界によって生ずる減磁を抑えることができ、
長時間の使用に対して回転力特性を維持することができ
る。In the permanent magnet type rotary electric machine having such magnetic poles, the demagnetizing field is the largest at the position facing the air gap of the permanent magnet, and conversely the demagnetizing field is in contact with the yoke 3 having high magnetic permeability. The magnetic field is small. Therefore, by using the high-coercive-force permanent magnet 2C on the air gap side portion having a large demagnetizing field,
Demagnetization caused by a large demagnetizing field can be suppressed,
Rotational force characteristics can be maintained for long-term use.
【００５０】図７は、本発明の永久磁石形回転電機の第
３の実施例を示す部分斜視図で、図５，図６と同様に永
久磁石式電動機のロータに適用した場合を示す。図７に
おいて、磁極を形成する高磁束密度磁石５Ａの両端に
は、高保磁力永久磁石２Ｄが接合されている。FIG. 7 is a partial perspective view showing a third embodiment of a permanent magnet type rotary electric machine of the present invention, and shows a case where it is applied to a rotor of a permanent magnet type electric motor as in FIGS. In FIG. 7, a high coercive force permanent magnet 2D is joined to both ends of the high magnetic flux density magnet 5A forming the magnetic pole.
【００５１】このように構成された永久磁石形回転電機
においても、特に反磁界が大となる磁極５Ａの両側に対
して、高保持力永久磁石２Ｄを設けることで、大きい反
磁界に伴う減磁を抑えることができる。Also in the permanent magnet type rotating electric machine configured as described above, by providing the high coercive force permanent magnets 2D on both sides of the magnetic pole 5A having a particularly large demagnetizing field, demagnetization accompanying a large demagnetizing field is achieved. Can be suppressed.
【００５２】図８は、本発明の永久磁石形回転電機の第
４の実施例を示す部分斜視図で、図５，図６及び図７に
対応する図である。図８においては、略台形の高磁束密
度磁石５Ｂの両側に対して、略三角柱状の高保磁力永久
磁石２Ｅを設けることで、最も大きい反磁界が発生する
両端部の減磁を抑えることができ、長期に亘って回転力
特性を維持することができる。FIG. 8 is a partial perspective view showing a fourth embodiment of the permanent magnet type rotary electric machine of the present invention, and is a view corresponding to FIGS. 5, 6 and 7. In FIG. 8, by providing a substantially triangular prism-shaped high coercive force permanent magnet 2E on both sides of the substantially trapezoidal high magnetic flux density magnet 5B, it is possible to suppress demagnetization at both ends where the largest demagnetizing field is generated. The torque characteristic can be maintained for a long time.
【００５３】図９は、本発明の永久磁石形回転電機の第
５の実施例を示す部分斜視図で、図５，図６，図７及び
図８に対応する図である。図９においては、磁極は温度
上昇時にも大きな保磁力(iHc) を有する弧状の耐熱性磁
石５Ｃと、図５と同様に、高磁束密度永久磁石１Ａとか
らなり、空隙側には耐熱性磁石５Ｃが位置し、継鉄３と
接する側には高磁束密度永久磁石１Ａが位置している。
この場合には、特に電流密度の高い高温部となる空隙側
の耐熱磁気特性を維持することができる。FIG. 9 is a partial perspective view showing a permanent magnet type rotary electric machine according to a fifth embodiment of the present invention and is a view corresponding to FIGS. 5, 6, 7 and 8. In FIG. 9, the magnetic pole is composed of an arc-shaped heat resistant magnet 5C having a large coercive force (iHc) even when the temperature rises, and a high magnetic flux density permanent magnet 1A as in FIG. 5C is located, and the high magnetic flux density permanent magnet 1A is located on the side in contact with the yoke 3.
In this case, it is possible to maintain the heat-resistant magnetic properties on the side of the void, which is a high temperature portion where the current density is particularly high.
【００５４】図10は、本発明の永久磁石形回転電機の第
６の実施例を示す部分斜視図で、図５，図６，図７，図
８及び図９に対応し、図５〜図９と異なるところは、軟
磁性材料の磁極片４Ａを有するロータの場合であり、先
の実施例と同様に、空隙側すなわち磁極片４Ａの側に平
板状の耐熱性磁石５Ｄが設けられ、また継鉄３と接する
側には、高磁束密度永久磁石１Ａが位置している。FIG. 10 is a partial perspective view showing a sixth embodiment of the permanent magnet type rotating electric machine of the present invention, which corresponds to FIGS. 5, 6, 7, 8 and 9, and FIGS. 9 differs from the rotor 9 having a magnetic pole piece 4A made of a soft magnetic material in the same manner as in the previous embodiment, in which a plate-shaped heat-resistant magnet 5D is provided on the gap side, that is, the magnetic pole piece 4A side. The high magnetic flux density permanent magnet 1A is located on the side in contact with the yoke 3.
【００５５】このように構成された永久磁石形回転電機
においては、前述したように永久磁石の空隙に面した位
置での反磁界が最も大きく、逆に透磁率の高い継鉄３と
接する位置での反磁界は小さい。特に温度上昇時には永
久磁石の保磁力(iHc) が低下して減磁する。In the permanent magnet type rotating electric machine constructed as described above, the demagnetizing field is the largest at the position facing the air gap of the permanent magnet as described above, and conversely at the position where it is in contact with the yoke 3 having high magnetic permeability. Has a small demagnetizing field. Especially when the temperature rises, the coercive force (iHc) of the permanent magnet decreases and demagnetizes.
【００５６】したがって、反磁界の大きな空隙側部分を
耐熱性磁石５Ｄとすることによって、温度上昇時の保磁
力の値を十分に確保し、その結果大きな反磁界にさらさ
れることによって生ずる減磁を抑えることができ、長時
間の使用に対してトルク特性を維持することのできる永
久磁石形回転電機を得ることができる。Therefore, by using the heat-resistant magnet 5D for the space side having a large demagnetizing field, a sufficient value of the coercive force at the time of temperature rise is secured, and as a result, demagnetization caused by exposure to a large demagnetizing field is achieved. It is possible to obtain a permanent magnet type rotary electric machine that can be suppressed and can maintain torque characteristics even after long-term use.
【００５７】図11は、本発明の永久磁石形回転電機の第
７の実施例を示す部分斜視図で、図５，図６，図７，図
８，図９及び図10に対応する図である。磁極を形成する
両端には温度上昇時にも大きな保磁力(iHc) を有する耐
熱性磁石５Ｅが位置し、また、中間部分には、図７と同
様に高磁束密度永久磁石５Ａが設けられている。FIG. 11 is a partial perspective view showing a seventh embodiment of the permanent magnet type rotating electric machine of the present invention, and is a view corresponding to FIGS. 5, 6, 7, 8, 9 and 10. is there. Heat-resistant magnets 5E having a large coercive force (iHc) even when the temperature rises are located at both ends forming the magnetic poles, and a high magnetic flux density permanent magnet 5A is provided in the middle portion as in FIG. .
【００５８】このように構成された永久磁石形回転電機
においては、高い磁束密度で高温となる磁極の両側に対
して、耐熱性磁石５Ｅを設けることで、温度上昇に対し
て初期の特性を維持することができる永久磁石形回転電
機を得ることができる。In the permanent magnet type rotating electric machine configured as described above, the heat-resistant magnets 5E are provided on both sides of the magnetic poles which become high in temperature with a high magnetic flux density, so that the initial characteristics are maintained even if the temperature rises. It is possible to obtain a permanent magnet type rotating electric machine that can be used.
【００５９】図12は、本発明の永久磁石形回転電機の第
８の実施例を示す部分斜視図で、図５〜図11に対応する
図である。図12においては、磁石両端の空隙側部分に設
けられた耐熱性磁石５Ｆの形状が三角柱となっており、
また継鉄３と接する側には、図８と同様に高磁束密度永
久磁石５Ｂが位置している。FIG. 12 is a partial perspective view showing an eighth embodiment of the permanent magnet type rotary electric machine of the present invention, and is a view corresponding to FIGS. 5 to 11. In FIG. 12, the shape of the heat resistant magnet 5F provided on the gap side portions of both ends of the magnet is a triangular prism,
Further, a high magnetic flux density permanent magnet 5B is located on the side in contact with the yoke 3 as in FIG.
【００６０】このように構成された永久磁石形回転電機
においては、永久磁石の両端部特に空隙側部分での反磁
界が最も大きく、逆に中間部分における反磁界は小さ
く、特に、温度上昇時には永久磁石の保磁力(iHc) が低
下して減磁が促進される両端部分に対して、耐熱性磁石
５Ｆを設けることによって、大きな反磁界にさらされる
ことによって生ずる減磁を抑えることができ、長時間の
使用に対してトルク特性の変わらない電動機を得ること
ができる。In the permanent magnet type rotating electric machine configured as described above, the demagnetizing field is the largest at both ends of the permanent magnet, especially at the gap side, and conversely, the demagnetizing field is small at the intermediate part. By providing heat resistant magnets 5F to both ends where the coercive force (iHc) of the magnet is reduced and demagnetization is promoted, demagnetization caused by exposure to a large demagnetizing field can be suppressed, It is possible to obtain an electric motor whose torque characteristics do not change over time.
【００６１】図13は、本発明の永久磁石形回転電機の第
９の実施例を示す部分斜視図で、図５〜図12に対応する
図である。図13において、磁極の空隙側部分はＳｍ−Ｃ
ｏ系の異方性ボンド磁石６が接合されている。この異方
性ボンド磁石６は、磁石粉が樹脂で結合された材料のた
めに電気抵抗が高い。また、磁極の継鉄側の部分は、Ｎ
ｂ−Ｆｅ−Ｂ系の高磁束密度磁石１Ａであり、焼結され
た金属材料であるために電気抵抗は低い。FIG. 13 is a partial perspective view showing a ninth embodiment of the permanent magnet type rotary electric machine of the present invention, and is a view corresponding to FIGS. 5 to 12. In FIG. 13, the gap side portion of the magnetic pole is Sm-C.
An o-type anisotropic bonded magnet 6 is bonded. This anisotropic bonded magnet 6 has a high electric resistance because it is a material in which magnet powder is bonded with resin. Also, the part of the magnetic pole on the yoke side is N
It is a b-Fe-B based high magnetic flux density magnet 1A, and has a low electric resistance because it is a sintered metal material.
【００６２】周知にように、ロータの磁極の表面には、
固定子鉄心のスロットに起因するリプル磁束が流れる。
このリプル磁束は、図14の矢印Ｃで示すように、固定子
鉄心７から半径方向に流れて磁極表面部の異方向性ボン
ド磁石６に入り、周方向に向きを変えた後、再び固定子
鉄心７へ戻る。なお、符号８は、固定子コイル、符号９
は、スロット楔である。As is well known, the surface of the magnetic pole of the rotor is
Ripple magnetic flux due to the slots of the stator core flows.
As shown by the arrow C in FIG. 14, this ripple magnetic flux flows from the stator core 7 in the radial direction and enters the anisotropically-bonded magnet 6 on the magnetic pole surface portion, changes its direction in the circumferential direction, and then returns to the stator again. Return to iron core 7. Reference numeral 8 is a stator coil, reference numeral 9
Is a slot wedge.
【００６３】一般にリプル磁束は、磁極表面部の永久磁
石６において垂直方向の成分を持つことから、それと直
交する磁極面内方向に渦電流が流れて損失の発生と温度
上昇の原因となるものであるが、本実施例においては、
この部分に高電気抵抗の異方性ボンド磁石６を接合して
いるために、渦電流の値を抑えることができる。In general, since the ripple magnetic flux has a vertical component in the permanent magnet 6 on the surface of the magnetic pole, an eddy current flows in the in-plane direction of the magnetic pole which is orthogonal to it, which causes loss and temperature rise. However, in this embodiment,
Since the anisotropic bonded magnet 6 having a high electric resistance is bonded to this portion, the value of the eddy current can be suppressed.
【００６４】このように、渦電流を抑えることができる
ので、ロータの表面における鉄損が低減し、温度上昇も
減らすことができる。したがって、温度上昇に起因する
減磁も防ぐことができ、長期にわたって高い磁束密度と
保磁力を維持することのできる永久磁石形回転電機を得
ることができる。Since the eddy current can be suppressed in this manner, iron loss on the surface of the rotor can be reduced and temperature rise can be reduced. Therefore, it is possible to obtain a permanent magnet type rotating electric machine that can prevent demagnetization due to temperature rise and can maintain a high magnetic flux density and a high coercive force for a long period of time.
【００６５】なお、磁極の空隙側部分には、永久磁石の
代りに高電気抵抗の軟磁性材料を使用しても、同様に渦
電流損失を低減させることができる。発明者は、比透磁
率が約50の圧粉磁心を磁極の空隙側部分に用い、また磁
極の継鉄側部分をＮｂ−Ｆｅ−Ｂ系の高磁束密度磁石と
した永久磁石式電動機で試験した結果、高い効率を示
し、また、トルク特性の低下も僅かであった。Even if a soft magnetic material having a high electric resistance is used instead of the permanent magnet in the gap side portion of the magnetic pole, the eddy current loss can be similarly reduced. The inventor conducted a test with a permanent magnet type electric motor in which a dust core having a relative magnetic permeability of about 50 was used for the air gap side portion of the magnetic pole, and the yoke side portion of the magnetic pole was a Nb-Fe-B type high magnetic flux density magnet. As a result, high efficiency was exhibited, and the torque characteristic was slightly reduced.
【００６６】図15は、本発明の永久磁石形回転電機の第
10の実施例を示す部分斜視図で、図５〜図13に対応する
図である。図15において、継鉄３に取り付けられている
磁極は、板材から弧状に形成された板状永久磁石10を電
動機の軸方向に積層し、高抵抗性の接着剤を用いて一体
に構成している。この一体に接着された後に着磁され
る。FIG. 15 shows a permanent magnet type rotary electric machine according to the present invention.
FIG. 14 is a partial perspective view showing a tenth embodiment, corresponding to FIGS. 5 to 13. In FIG. 15, the magnetic poles attached to the yoke 3 are formed by stacking plate-shaped permanent magnets 10 formed in an arc shape from a plate material in the axial direction of the electric motor and integrally using a high resistance adhesive. There is. It is magnetized after being bonded together.
【００６７】このように構成された永久磁石形回転電機
においては、図示しないステータ鉄心のスロットに基づ
くリプル磁束は、磁極に対してほぼ垂直に入るが、この
方向は板状永久磁石10の板材の面方向であり、しかも、
層間に介在する接着剤が高電気抵抗であるために、発生
する渦電流損失を抑えることができる。したがって、永
久磁石の過熱及び減磁現象を防止することができ、電動
機の損失を低減することができる。In the permanent magnet type rotating electric machine configured as described above, the ripple magnetic flux based on the slots of the stator core (not shown) enters almost perpendicularly to the magnetic poles, but this direction is the same as that of the plate material of the plate-shaped permanent magnet 10. It is the surface direction, and moreover,
Since the adhesive interposed between the layers has a high electric resistance, it is possible to suppress the eddy current loss that occurs. Therefore, it is possible to prevent overheating and demagnetization of the permanent magnet, and reduce the loss of the electric motor.
【００６８】図16は、本発明の永久磁石形回転電機の第
11の実施例を示す部分斜視図で、図15に対応する図であ
る。図16においては、板状永久磁石10を電動機の軸方向
に積層して磁極を構成した図15で示す永久磁石形回転電
機の板状永久磁石10の方向を、周方向に変えて板状永久
磁石10Ａとした場合を示し、この場合においても、渦電
流損失は同様に低減される。FIG. 16 shows a permanent magnet type rotary electric machine according to the present invention.
FIG. 16 is a partial perspective view showing an eleventh embodiment, corresponding to FIG. 15. In FIG. 16, the plate-shaped permanent magnets 10 are laminated in the axial direction of the electric motor to form magnetic poles, and the direction of the plate-shaped permanent magnets 10 of the permanent magnet type rotating electric machine shown in FIG. 15 is changed to the circumferential direction. The case where the magnet 10A is used is shown, and in this case as well, the eddy current loss is similarly reduced.
【００６９】なお、磁極全体を積層構造とせず、空隙に
面する部分のみ積層としてもよい。さらに、磁極となる
空隙側の部分にスリットをいれても同様の効果を得るこ
とができる。The entire magnetic pole may not have a laminated structure, and only the portion facing the void may be laminated. Further, the same effect can be obtained even if a slit is formed in the gap side portion which becomes the magnetic pole.
【００７０】図17は、本発明の永久磁石形回転電機の第
12の実施例を示す部分斜視図で、図15に対応する図であ
る。図17においては、図15で示した永久磁石形回転電機
のロータの外周に配置した板状永久磁石10のうち、軸方
向の端部には、Ｎｄ−Ｆｅ−Ｂ系の高強度永久磁石11を
用いている。FIG. 17 shows the permanent magnet type rotating electric machine of the present invention.
FIG. 16 is a partial perspective view showing a twelfth embodiment, corresponding to FIG. 15. In FIG. 17, among the plate-shaped permanent magnets 10 arranged on the outer circumference of the rotor of the permanent magnet type rotary electric machine shown in FIG. 15, the Nd—Fe—B-based high-strength permanent magnets 11 are provided at the ends in the axial direction. Is used.
【００７１】そのため、ロータをステータの中に挿入す
るときに、端部の高強度永久磁石11が接触した場合にお
いても、永久磁石の損傷のおそれを軽減することができ
る、なお、高強度永久磁石11の材料としては、Ｐｒ−Ｆ
ｅ−Ｂ系の材料を用いてもよい。Therefore, when the rotor is inserted into the stator, even if the high-strength permanent magnets 11 at the ends come into contact with each other, the risk of damage to the permanent magnets can be reduced. The material of 11 is Pr-F
An e-B type material may be used.
【００７２】一方、図18は、本発明の永久磁石形回転電
機の第13の実施例を示す部分斜視図で、図16に対応する
図である。図18においては、図16で示した永久磁石形回
転電機の継鉄３の外周に配置した板状永久磁石10Ａのう
ち、両端に位置する板状永久磁石10Ａの代りに、図17で
示した高強度永久磁石11と同一材料の高強度永久磁石11
Ａを採用した場合を示す。この場合においても、ステー
タに挿入する過程で両端に位置する高強度永久磁石11Ａ
によって、接触による損傷のおそれを軽減することがで
きる。On the other hand, FIG. 18 is a partial perspective view showing a thirteenth embodiment of the permanent magnet type rotary electric machine of the present invention and corresponds to FIG. 18, instead of the plate-shaped permanent magnets 10A located at both ends, among the plate-shaped permanent magnets 10A arranged on the outer periphery of the yoke 3 of the permanent magnet type rotating electric machine shown in FIG. 16, FIG. 17 is shown. High-strength permanent magnet 11 made of the same material as high-strength permanent magnet 11
The case where A is adopted is shown. Even in this case, the high-strength permanent magnets 11A located at both ends in the process of inserting into the stator
This can reduce the risk of damage due to contact.
【００７３】図19は、本発明の永久磁石形回転電機の第
14の実施例を示す部分斜視図で、図17及び図18に対応す
る図である。図19においては、磁極部分は、両端に対し
て図17と同様に設けられた高強度永久磁石11と、これら
の高強度永久磁石11の間に設けられた低強度永久磁石12
で構成されている。FIG. 19 shows the permanent magnet type rotary electric machine of the present invention.
FIG. 19 is a partial perspective view showing a fourteenth embodiment, corresponding to FIGS. 17 and 18. In FIG. 19, the magnetic pole portion includes high-strength permanent magnets 11 provided at both ends in the same manner as in FIG. 17, and low-strength permanent magnets 12 provided between these high-strength permanent magnets 11.
It is composed of
【００７４】このように磁極部分が構成された永久磁石
形回転電機においても、ロータをステータに挿入する過
程において、磁極の端部がステータの鉄心に接触した場
合における磁極の端面の損傷を軽減することができる。Also in the permanent magnet type rotating electric machine having the magnetic pole portions as described above, damage to the end faces of the magnetic poles is reduced when the end portions of the magnetic poles come into contact with the iron core of the stator in the process of inserting the rotor into the stator. be able to.
【００７５】一方、図20は、本発明の永久磁石形回転電
機の第15の実施例を示す部分斜視図で、図19に対応する
図である。図20においては、高強度永久磁石が図19にお
いて軸方向の端部に設けられているのに対し、円周方向
の端部に対して、図18で組み込まれた高強度永久磁石11
Ａと同一品の高強度永久磁石11Ａが組み込まれている。On the other hand, FIG. 20 is a partial perspective view showing a fifteenth embodiment of the permanent magnet type rotary electric machine of the present invention, and is a view corresponding to FIG. In FIG. 20, the high-strength permanent magnet is provided at the end portion in the axial direction in FIG. 19, whereas the high-strength permanent magnet 11 incorporated in FIG. 18 is provided at the end portion in the circumferential direction.
The same high-strength permanent magnet 11A as A is incorporated.
【００７６】このように構成された永久磁石形回転電機
においても、特に接触する可能性が大きい端部に高強度
永久磁石11Ａを配置することで、組立作業中における磁
極部の損傷を減らすことができる。Also in the permanent magnet type rotating electric machine configured as described above, by disposing the high-strength permanent magnet 11A at the end portion which is particularly likely to come into contact, damage to the magnetic pole portion during assembly work can be reduced. it can.
【００７７】図21は、本発明の永久磁石形回転電機の第
16の実施例を示す部分斜視図で、図15，図16，図17及び
図18に対応する図である。図21において、継鉄３に取り
付けられて磁極となる永久磁石は、Ｎｄ−Ｆｅ−Ｂ系の
高強度永久磁石11ＢとＳｍ−Ｃｏ系の低強度永久磁石12
とが接着剤で一体に構成されており、高強度永久磁石11
Ｂが継鉄３に接合され、低強度永久磁石12は高強度永久
磁石11Ｂの外周側に取り付けられている。FIG. 21 shows a permanent magnet type rotary electric machine according to the present invention.
FIG. 19 is a partial perspective view showing a sixteenth embodiment, corresponding to FIGS. 15, 16, 17, and 18. In FIG. 21, the permanent magnets that are attached to the yoke 3 and serve as magnetic poles are Nd—Fe—B type high-strength permanent magnets 11B and Sm—Co type low-strength permanent magnets 12.
And are integrally formed of adhesive, and high-strength permanent magnet 11
B is joined to the yoke 3, and the low strength permanent magnet 12 is attached to the outer peripheral side of the high strength permanent magnet 11B.
【００７８】このように構成された永久磁石形回転電機
においては、高強度永久磁石11Ｂと低強度永久磁石12を
一体として組み立てた後に着磁を行い、次にロータの継
鉄部に取り付ける場合において、永久磁石と継鉄３との
間にはきわめて大きな吸引力がはたらいて、両者が激し
く接触することがある。In the permanent magnet type rotating electric machine configured as described above, when the high-strength permanent magnet 11B and the low-strength permanent magnet 12 are integrally assembled and then magnetized, and then attached to the yoke portion of the rotor, A very large attractive force acts between the permanent magnet and the yoke 3, and the two may come into violent contact with each other.
【００７９】しかし、このような場合においても、継鉄
３と接触する永久磁石の箇所は高強度永久磁石11が配置
されているので、衝突による損傷や磁気特性の変化を防
ぐことができる。なお、高強度永久磁石11Ｂの材料とし
ては、Ｎｄ−Ｆｅ−Ｂ系の代りに、Ｐｒ−Ｆｅ−Ｂ系の
材料を用いてもよい。However, even in such a case, since the high-strength permanent magnet 11 is arranged at the location of the permanent magnet that comes into contact with the yoke 3, damage due to collision and change in magnetic characteristics can be prevented. As a material for the high-strength permanent magnet 11B, a Pr—Fe—B based material may be used instead of the Nd—Fe—B based material.
【００８０】図22は、本発明の永久磁石形回転電機の第
17の実施例を示す部分側面図で、図５で示した磁極が組
み込まれたロータの磁極に対して、着磁している状態を
示す。FIG. 22 shows a permanent magnet type rotary electric machine according to the present invention.
FIG. 17 is a partial side view showing a seventeenth embodiment, showing a state in which the magnetic poles of the rotor having the magnetic poles shown in FIG. 5 are magnetized.
【００８１】すなわち、高磁束密度永久磁石１の外面に
接合された高保磁力永久磁石２の更に外面には、Ｅ形の
鉄心の中央に突設された着磁用磁石13の先端に形成され
た弧状の凹部が押圧されており、着磁用磁極13の外周に
は、環状に形成された着磁用コイル14があらかじめ挿着
されている。That is, on the outer surface of the high coercive force permanent magnet 2 joined to the outer surface of the high magnetic flux density permanent magnet 1, the tip of the magnetizing magnet 13 projecting from the center of the E-shaped iron core is formed. The arc-shaped recess is pressed, and a magnetizing coil 14 formed in an annular shape is previously attached to the outer periphery of the magnetizing magnetic pole 13.
【００８２】着磁用磁極13の他側には、図示しない着磁
用継鉄を介して継鉄３の端部に密着され、着磁用コイル
14の端子は、図示しない開閉器を介して図示しない直流
電源に接続されている。On the other side of the magnetizing magnetic pole 13, a magnetizing coil (not shown) is closely attached to the end portion of the yoke 3, and the magnetizing coil is attached.
The 14 terminals are connected to a DC power source (not shown) via a switch (not shown).
【００８３】図22において、着磁コイル14に大電流を流
して着磁コイルを磁化すると、着磁用磁極13を貫通する
磁束は、高保磁力永久磁石２を経て、高磁束密度永久磁
石１から継鉄３へ貫通する。着磁用磁極13と継鉄３は軟
磁性材料のために、磁束密度が飽和値に至らないときに
は、磁化力のすべてが永久磁石を着磁する磁束となる。In FIG. 22, when a large current is passed through the magnetizing coil 14 to magnetize the magnetizing coil, the magnetic flux penetrating the magnetizing magnetic pole 13 passes from the high coercive force permanent magnet 2 to the high magnetic flux density permanent magnet 1. Penetrate to Yoke 3. Since the magnetizing magnetic pole 13 and the yoke 3 are soft magnetic materials, when the magnetic flux density does not reach the saturation value, all of the magnetizing force becomes the magnetic flux that magnetizes the permanent magnet.
【００８４】しかし、磁束密度が高くなれば、まず継鉄
３のうち、永久磁石と接する部分が飽和する。そのた
め、この部分の磁気抵抗によって磁束の一部は漏れ磁束
となる。すると、永久磁石に流れる磁束量は、着磁用磁
極13に近い部分では多いが、そこから離れて継鉄３に近
い部分では低下し、その結果磁化力が不足して着磁が困
難となる。However, if the magnetic flux density becomes high, first, the portion of the yoke 3 that is in contact with the permanent magnet is saturated. Therefore, a part of the magnetic flux becomes a leakage magnetic flux due to the magnetic resistance of this portion. Then, the amount of magnetic flux flowing through the permanent magnet is large in the portion close to the magnetizing magnetic pole 13, but decreases in the portion near the magnetizing pole 3 away from it, and as a result, the magnetizing force becomes insufficient and the magnetization becomes difficult. .
【００８５】本実施例においては、着磁時に流れる磁束
量の少ない部分には着磁の容易な高磁束密度永久磁石１
を置き、また、このときの磁束量の多い部分には着磁の
困難な高保磁力永久磁石２が介在する磁気回路となって
いる。したがって、前者に与えられる磁化力が強い一方
で、後者には大きな着磁磁化力が与えられる。In this embodiment, the high magnetic flux density permanent magnet 1 which can be easily magnetized is provided in the portion where the amount of magnetic flux flowing during magnetization is small.
The magnetic circuit has a high coercive force permanent magnet 2 which is difficult to magnetize in a portion having a large amount of magnetic flux at this time. Therefore, while the magnetizing force applied to the former is strong, the latter magnetizing force is applied to the latter.
【００８６】したがって、このように構成された永久磁
石形回転電機においては、着磁磁化力の弱い位置に着磁
しやすい磁石材料を、また着磁磁化力の強い位置に着磁
しにくい磁石材料を介在させることにより、磁石全体を
十分に着磁することが可能となった。Therefore, in the permanent magnet type rotating electric machine configured as described above, a magnet material which is easily magnetized at a position where the magnetizing magnetizing force is weak and a magnet material which is hard to magnetize at a position where the magnetizing magnetizing force is strong. With the interposition of, it became possible to sufficiently magnetize the entire magnet.
【００８７】着磁しにくい永久磁石としては、その材料
が高保磁力であることが一つの目安である。しかし、保
磁力が極端に大きな値ではなくとも、着磁の困難な永久
磁石もある。Ｓｍ2 Ｃｏ17系希土類磁石はそのような磁
石材料の一つであり、さらに、希土類ボンド磁石はいず
れも着磁の困難な材料である。As a permanent magnet which is hard to magnetize, one of the criteria is that its material has a high coercive force. However, some permanent magnets are difficult to magnetize even if the coercive force is not extremely large. The Sm 2 Co 17 type rare earth magnet is one of such magnet materials, and the rare earth bonded magnets are difficult to magnetize.
【００８８】このような着磁の困難な永久磁石と、着磁
の比較的容易なＮｄ−Ｆｅ−Ｂ系の高磁束密度永久磁石
とを組み合わせて一体の永久磁石とし、着磁後に磁気回
路を組み立てる場合にも同様の効果が得られる。Such a permanent magnet, which is difficult to magnetize, and an Nd-Fe-B type high magnetic flux density permanent magnet, which is relatively easy to magnetize, are combined to form an integral permanent magnet, and a magnetic circuit is formed after the magnetization. The same effect can be obtained when assembling.
【００８９】[0089]
【発明の効果】以上、請求項１に記載の発明の永久磁石
によれば、高磁束密度磁性部とこの高磁束密度磁性部の
両端に設けられた高保磁力磁性部を備えることで、強度
の大なる反磁界が印加される永久磁石の両端は、この両
端に設けられた高保磁力磁性部によって、反磁界による
磁束の減少を緩和したので、長期にわたって高い保磁力
を維持することのできる永久磁石を得ることができる。As described above, according to the permanent magnet of the invention described in claim 1, since the high magnetic flux density magnetic portion and the high coercive force magnetic portions provided at both ends of the high magnetic flux density magnetic portion are provided, At both ends of the permanent magnet to which a large demagnetizing field is applied, the high coercive force magnetic portions provided at both ends alleviate the decrease in the magnetic flux due to the demagnetizing field, so that the permanent magnet can maintain a high coercive force for a long period of time. Can be obtained.
【００９０】また、請求項２に記載の発明の永久磁石に
よれば、高磁束密度磁性部とこの高磁束密度磁性部の両
端に設けられた耐熱磁性部を備えることで、渦電流損失
が大で高温となる永久磁石の両端は、この両端に設けら
れた耐熱磁性部によって、温度上昇による保磁力の減少
を緩和したので、長期にわたって高い保磁力を維持する
ことのできる永久磁石を得ることができる。According to the permanent magnet of the second aspect of the invention, since the high magnetic flux density magnetic portion and the heat resistant magnetic portions provided at both ends of the high magnetic flux density magnetic portion are provided, the eddy current loss is large. At both ends of the permanent magnet, which has a high temperature, the heat-resistant magnetic parts provided at both ends alleviate the decrease in coercive force due to temperature rise, so that it is possible to obtain a permanent magnet that can maintain a high coercive force for a long period of time. it can.
【００９１】また、請求項３に記載の発明の永久磁石形
回転電機は、継鉄に等間隔に突設された複数の高磁束密
度磁性磁極と、この高磁束密度磁性磁極の先端に固定さ
れる高保持力磁極を備えることで、強度の大なる反磁界
が印加される磁極の先端は、この先端に設けられた高保
磁力磁性部によって、反磁界による磁束の減少を緩和し
たので、長期にわたって高い保磁力を維持することので
きる永久磁石を得ることができる。Further, in the permanent magnet type rotating electric machine according to the third aspect of the present invention, a plurality of high magnetic flux density magnetic magnetic poles protruding from the yoke at equal intervals are fixed to the tip of the high magnetic flux density magnetic magnetic pole. By providing a high coercive force magnetic pole, the tip of the magnetic pole to which a strong demagnetizing field is applied mitigates the decrease in magnetic flux due to the demagnetizing field due to the high coercive force magnetic portion provided at this tip, A permanent magnet that can maintain a high coercive force can be obtained.
【００９２】また、請求項４に記載の発明の永久磁石形
回転電機によれば、継鉄に等間隔に突設された複数の高
磁束密度磁性磁極と、この高磁束密度磁性磁極の円周方
向の端部に固定される高保持力磁極を備えることで、強
度の大なる反磁界が印加される磁極の円周方向の両端
は、この両端に設けられた高保磁力磁性部によって、反
磁界による磁束の減少を緩和したので、長期にわたって
高い保磁力を維持することのできる永久磁石を得ること
ができる。Further, according to the permanent magnet type rotating electric machine of the invention described in claim 4, a plurality of high magnetic flux density magnetic poles projecting from the yoke at equal intervals and the circumference of the high magnetic flux density magnetic poles. By providing a high coercive force magnetic pole fixed to the end of the magnetic field, both ends in the circumferential direction of the magnetic pole to which a strong demagnetizing field is applied are demagnetized by the high coercive force magnetic parts provided at both ends. Since the decrease in the magnetic flux due to is alleviated, it is possible to obtain a permanent magnet that can maintain a high coercive force for a long period of time.
【００９３】また、請求項５に記載の発明の永久磁石形
回転電機によれば、継鉄に等間隔に突設された複数の高
磁束密度磁性磁極と、この高磁束密度磁性磁極の先端に
固定される耐熱性磁極を備えることで、渦電流損失が大
で高温となる磁極の先端は、この先端に固定される耐熱
性磁極によって、温度上昇による保磁力の減少を緩和し
たので、長期にわたって高い保磁力を維持することので
きる永久磁石を得ることができる。Further, according to the permanent magnet type rotating electric machine of the invention described in claim 5, a plurality of high magnetic flux density magnetic poles projecting from the yoke at equal intervals and at the tip of the high magnetic flux density magnetic poles. By providing a heat-resistant magnetic pole that is fixed, the tip of the magnetic pole, which has a large eddy current loss and becomes high temperature, reduces the decrease in coercive force due to temperature rise due to the heat-resistant magnetic pole that is fixed to this tip. A permanent magnet that can maintain a high coercive force can be obtained.
【００９４】また、請求項６に記載の発明の永久磁石形
回転電機によれば、継鉄に等間隔に突設された複数の高
磁束密度磁性磁極と、この高磁束密度磁性磁極の円周方
向の端部に固定される耐熱性磁極を備えることで、渦電
流損失が大で高温となる磁極の円周方向の端部は、この
端部に固定される耐熱性磁極によって、温度上昇による
保磁力の減少を緩和したので、長期にわたって高い保磁
力を維持することのできる永久磁石を得ることができ
る。Further, according to the permanent magnet type rotating electric machine of the invention described in claim 6, a plurality of high magnetic flux density magnetic poles projecting from the yoke at equal intervals and the circumference of the high magnetic flux density magnetic poles. With the heat-resistant magnetic pole fixed to the end of the direction, the circumferential end of the magnetic pole, which has a large eddy current loss and becomes high temperature, is caused by the temperature rise due to the heat-resistant magnetic pole fixed to this end. Since the decrease in the coercive force is alleviated, it is possible to obtain a permanent magnet that can maintain a high coercive force for a long period of time.
【００９５】また、請求項７に記載の発明の永久磁石形
回転電機によれば、継鉄に等間隔に突設された複数の低
抵抗磁性磁極と、この低抵抗磁性磁極の先端に固定され
る高抵抗磁性磁極を備えることで、誘起起電力が発生す
る磁極の先端は、この先端に固定された高抵抗磁性磁極
によって、渦電流が抑制したので、渦電流による温度上
昇を減らし、長期にわたって磁束密度の低下を防ぐこと
のできる永久磁石形回転電機を得ることができる。Further, according to the permanent magnet type rotating electric machine of the invention described in claim 7, a plurality of low resistance magnetic magnetic poles protruding from the yoke at equal intervals and fixed to the tips of the low resistance magnetic magnetic poles. The high-resistance magnetic pole that generates induced electromotive force suppresses the eddy current by the high-resistance magnetic pole fixed to this tip. It is possible to obtain a permanent magnet type rotating electric machine that can prevent a decrease in magnetic flux density.
【００９６】また、請求項８に記載の発明の永久磁石形
回転電機によれば、少なくとも外面側が弧状に形成され
た複数の磁極板を軸方向に絶縁接着剤で接合し磁極を形
成することで、誘起起電力が発生する磁極は、軸方向に
重ねられた磁極板の間の絶縁接着剤によって、渦電流損
失を抑制したので、渦電流による温度上昇を減らし、長
期にわたって磁束密度の低下を防ぐことのできる永久磁
石形回転電機を得ることができる。Further, according to the permanent magnet type rotating electric machine of the invention described in claim 8, a plurality of magnetic pole plates, at least the outer surfaces of which are formed in an arc shape, are axially joined with an insulating adhesive to form magnetic poles. , The magnetic pole where the induced electromotive force is generated suppresses the eddy current loss by the insulating adhesive between the magnetic pole plates that are stacked in the axial direction, so the temperature rise due to the eddy current is reduced and the decrease of the magnetic flux density is prevented for a long time. It is possible to obtain a permanent magnet type rotating electric machine that can be used.
【００９７】また、請求項９に記載の発明の永久磁石形
回転電機によれば、軸方向の端部の磁極板を高強度磁性
材とすることで、組み込まれる継鉄は、磁極の軸方向の
端部に設けられた高強度材料によって、組立時の接触に
よる損傷を防止したので、組立時の課題を解消すること
のできる永久磁石形回転電機を得ることができる。According to the permanent magnet type rotating electric machine of the invention described in claim 9, the magnetic pole plate at the end portion in the axial direction is made of a high-strength magnetic material, so that the yoke incorporated therein is in the axial direction of the magnetic pole. Since the high-strength material provided at the end of the structure prevents damage due to contact during assembly, it is possible to obtain a permanent magnet type rotating electric machine that can solve the problems during assembly.
【００９８】また、請求項10に記載の発明の永久磁石形
回転電機によれば、短冊状の複数の磁極板を円周方向に
絶縁接着剤で接合し磁極を形成することで、誘起起電力
が発生する磁極は、円周方向に重ねられた磁極板の間の
絶縁接着剤によって、渦電流損失を抑制したので、渦電
流による温度上昇を防ぎ、長期にわたって磁束密度の低
下を防ぐことのできる永久磁石形回転電機を得ることが
できる。Further, according to the permanent magnet type rotating electric machine of the invention described in claim 10, the induced electromotive force is obtained by forming a magnetic pole by joining a plurality of strip-shaped magnetic pole plates in the circumferential direction with an insulating adhesive. The eddy current loss is suppressed by the insulating adhesive between the magnetic pole plates that are overlapped in the circumferential direction.Therefore, the temperature rise due to the eddy current can be prevented and the decrease in magnetic flux density can be prevented for a long time. Form electric rotating machine can be obtained.
【００９９】また、請求項11に記載の発明の永久磁石形
回転電機によれば、円周方向の端部の磁極板を高保磁力
磁極板とすることで、強度の大なる反磁界が印加される
磁極の円周方向の端部は、この端部に設けられた高保磁
力磁性板によって、反磁界による磁束の減少を緩和した
ので、長期にわたって高い保磁力を維持することのでき
る永久磁石形回転電機を得ることができる。According to the permanent magnet type rotating electric machine of the invention described in claim 11, the magnetic pole plate at the end portion in the circumferential direction is a high coercive force magnetic pole plate so that a strong demagnetizing field is applied. The end of the magnetic pole in the circumferential direction is a permanent magnet type rotation that can maintain a high coercive force for a long period of time because the high coercive force magnetic plate provided at this end mitigates the decrease in magnetic flux due to the demagnetizing field. You can get an electric machine.
【０１００】また、請求項12に記載の発明の永久磁石形
回転電機によれば、円周方向の端部の磁極板を高強度磁
性材とすることで、組み込まれる継鉄の磁極は、この磁
極の円周方向の端部に設けられた高強度材料によって、
組立時の接触による損傷を防止するとともに、各磁極板
の間の絶縁接着剤によって、渦電流損失を減少させたの
で、組立時の課題を解消し、長期にわたって磁束密度の
低下を防ぐことのできる永久磁石形回転電機を得ること
ができる。Further, according to the permanent magnet type rotating electric machine of the invention described in claim 12, the magnetic pole of the yoke to be incorporated is made by using the magnetic pole plate at the end portion in the circumferential direction as a high strength magnetic material. By the high strength material provided at the circumferential ends of the magnetic poles,
Since the eddy current loss was reduced by the insulating adhesive between each pole plate while preventing damage due to contact at the time of assembly, the permanent magnet that can solve the problem at the time of assembly and prevent the decrease of magnetic flux density for a long time Form electric rotating machine can be obtained.
【０１０１】また、請求項13に記載の発明の永久磁石形
回転電機によれば、継鉄に等間隔に突設された複数の低
強度磁極と、この低強度磁極の軸方向の端部に設けられ
た高強度磁極を備えることで、組み込まれた継鉄の磁極
は、この磁極に突設された低強度磁極の軸方向の端部に
設けられた高強度磁極によって組立時の接触による損傷
を防止したので、組立時の課題を解消することのできる
永久磁石形回転電機を得ることができる。According to the permanent magnet type rotating electric machine of the invention described in claim 13, a plurality of low-strength magnetic poles protruding from the yoke at equal intervals and at the axial end portions of the low-strength magnetic poles. By providing the high-strength magnetic pole provided, the built-in yoke magnetic pole is damaged by the contact at the time of assembly by the high-strength magnetic pole provided at the axial end of the low-strength magnetic pole protruding from the magnetic pole. Since the above is prevented, it is possible to obtain a permanent magnet type rotating electric machine that can solve the problems during assembly.
【０１０２】また、請求項14に記載の発明の永久磁石形
回転電機によれば、継鉄に等間隔に突設された複数の低
強度磁極と、この低強度磁極の円周方向の端部に設けら
れた高強度磁極を備えることで、組み込まれる継鉄の磁
極は、この磁極の円周方向の端部に設けられた高強度磁
極によって、固定子との接触による損傷を防止したの
で、組立時の課題を解消することのできる永久磁石形回
転電機を得ることができる。According to the permanent magnet type rotating electric machine of the invention described in claim 14, a plurality of low-strength magnetic poles projecting from the yoke at equal intervals and end portions in the circumferential direction of the low-strength magnetic poles. By including the high-strength magnetic pole provided in the, the yoke magnetic pole to be incorporated, since the high-strength magnetic pole provided at the circumferential end of this magnetic pole prevented damage due to contact with the stator, It is possible to obtain a permanent magnet type rotating electric machine that can solve the problems during assembly.
【０１０３】また、請求項15に記載の発明の永久磁石形
回転電機によれば、継鉄に等間隔に突設された複数の高
強度磁極板と、この高強度磁極板の先端に設けられた低
強度磁極を備えることで、組立時に継鉄に固定される磁
極は、この磁極の基部に設けられた高強度磁極板によっ
て、組立時の接触による損傷を防止したので、組立時の
課題を解消することのできる永久磁石形回転電機を得る
ことができる。According to the permanent magnet type rotating electric machine of the invention described in claim 15, a plurality of high-strength magnetic pole plates protruding from the yoke at equal intervals and provided at the tip of the high-strength magnetic pole plate. Since the magnetic pole fixed to the yoke at the time of assembly is equipped with the low strength magnetic pole, the high strength magnetic pole plate provided at the base of the magnetic pole prevents damage due to contact at the time of assembly. It is possible to obtain a permanent magnet type rotating electric machine that can be eliminated.
【図１】本発明の永久磁石の第１の実施例を示す斜視
図。FIG. 1 is a perspective view showing a first embodiment of a permanent magnet of the present invention.
【図２】本発明の永久磁石の第１の実施例の作用を示す
グラフ。FIG. 2 is a graph showing the operation of the first embodiment of the permanent magnet of the present invention.
【図３】本発明の永久磁石の第１の実施例の図２と異な
る作用を示すグラフ。FIG. 3 is a graph showing an operation different from that of FIG. 2 of the first embodiment of the permanent magnet of the present invention.
【図４】本発明の永久磁石の第２の実施例を示す斜視
図。FIG. 4 is a perspective view showing a second embodiment of the permanent magnet of the present invention.
【図５】本発明の永久磁石形回転電機の第１の実施例を
示す部分斜視図。FIG. 5 is a partial perspective view showing a first embodiment of a permanent magnet type rotary electric machine of the present invention.
【図６】本発明の永久磁石形回転電機の第２の実施例を
示す部分斜視図。FIG. 6 is a partial perspective view showing a second embodiment of the permanent magnet type rotary electric machine of the present invention.
【図７】本発明の永久磁石形回転電機の第３の実施例を
示す部分斜視図。FIG. 7 is a partial perspective view showing a third embodiment of the permanent magnet type rotary electric machine of the present invention.
【図８】本発明の永久磁石形回転電機の第４の実施例を
示す部分斜視図。FIG. 8 is a partial perspective view showing a fourth embodiment of the permanent magnet type rotary electric machine of the present invention.
【図９】本発明の永久磁石形回転電機の第５の実施例を
示す部分斜視図。FIG. 9 is a partial perspective view showing a fifth embodiment of a permanent magnet type rotary electric machine of the present invention.
【図１０】本発明の永久磁石形回転電機の第６の実施例
を示す部分斜視図。FIG. 10 is a partial perspective view showing a sixth embodiment of the permanent magnet type rotary electric machine of the present invention.
【図１１】本発明の永久磁石形回転電機の第７の実施例
を示す部分斜視図。FIG. 11 is a partial perspective view showing a permanent magnet type rotary electric machine according to a seventh embodiment of the present invention.
【図１２】本発明の永久磁石形回転電機の第８の実施例
を示す部分斜視図。FIG. 12 is a partial perspective view showing an eighth embodiment of the permanent magnet type rotating electric machine of the present invention.
【図１３】本発明の永久磁石形回転電機の第９の実施例
を示す部分斜視図。FIG. 13 is a partial perspective view showing a ninth embodiment of the permanent magnet type rotary electric machine of the present invention.
【図１４】本発明の永久磁石形回転電機の作用を説明す
るための部分縦断面図。FIG. 14 is a partial vertical cross-sectional view for explaining the operation of the permanent magnet type rotary electric machine of the present invention.
【図１５】本発明の永久磁石形回転電機の第10の実施例
を示す部分斜視図。FIG. 15 is a partial perspective view showing a tenth embodiment of the permanent magnet type rotary electric machine of the present invention.
【図１６】本発明の永久磁石形回転電機の第11の実施例
を示す部分斜視図。FIG. 16 is a partial perspective view showing an eleventh embodiment of the permanent magnet type rotary electric machine of the present invention.
【図１７】本発明の永久磁石形回転電機の第12の実施例
を示す部分斜視図。FIG. 17 is a partial perspective view showing a twelfth embodiment of the permanent magnet type rotary electric machine of the present invention.
【図１８】本発明の永久磁石形回転電機の第13の実施例
を示す部分斜視図。FIG. 18 is a partial perspective view showing a thirteenth embodiment of the permanent magnet type rotary electric machine of the present invention.
【図１９】本発明の永久磁石形回転電機の第14の実施例
を示す部分斜視図。FIG. 19 is a partial perspective view showing a fourteenth embodiment of the permanent magnet type rotary electric machine of the present invention.
【図２０】本発明の永久磁石形回転電機の第15の実施例
を示す部分斜視図。FIG. 20 is a partial perspective view showing a fifteenth embodiment of the permanent magnet type rotary electric machine of the present invention.
【図２１】本発明の永久磁石形回転電機の第16の実施例
を示す部分斜視図。FIG. 21 is a partial perspective view showing a sixteenth embodiment of the permanent magnet type rotary electric machine of the present invention.
【図２２】本発明の永久磁石形回転電機の着磁方法の一
例を示す部分断面図。FIG. 22 is a partial cross-sectional view showing an example of a method of magnetizing a permanent magnet type rotary electric machine of the present invention.
１，１Ａ，１Ｂ，５Ａ，５Ｂ，11，11Ａ…高磁束密度磁
石、２，２Ａ，２Ｂ，２Ｃ，２Ｄ，２Ｅ…高保磁力磁
石、３…継鉄、４…磁極、４Ａ…磁極片、５…磁極片、
５Ｃ，５Ｄ，５Ｅ，５Ｆ…耐熱性磁石、６…異方性ボン
ド磁石、７…固定子鉄心、８…固定子コイル、９…スロ
ット楔、10，10Ａ…板状永久磁石、11…高強度永久磁
石、12…低強度永久磁石、13…着磁用磁極、14…着磁用
コイル。1, 1A, 1B, 5A, 5B, 11, 11A ... High magnetic flux density magnet, 2, 2A, 2B, 2C, 2D, 2E ... High coercive force magnet, 3 ... Yoke, 4 ... Magnetic pole, 4A ... Magnetic pole piece, 5 ... pole pieces,
5C, 5D, 5E, 5F ... Heat resistant magnet, 6 ... Anisotropic bonded magnet, 7 ... Stator core, 8 ... Stator coil, 9 ... Slot wedge, 10, 10A ... Plate permanent magnet, 11 ... High strength Permanent magnets, 12 ... Low-strength permanent magnets, 13 ... Magnetizing magnetic poles, 14 ... Magnetizing coils.
Claims (16)
部の両端に設けられた高保磁力磁性部を備えた永久磁
石。1. A permanent magnet having a high magnetic flux density magnetic portion and a high coercive force magnetic portion provided at both ends of the high magnetic flux density magnetic portion.
部の両端に設けられた耐熱磁性部を備えた永久磁石。2. A permanent magnet having a high magnetic flux density magnetic portion and heat resistant magnetic portions provided at both ends of the high magnetic flux density magnetic portion.
密度磁性磁極と、この高磁束密度磁性磁極の先端に固定
される高保持力磁極を備えた永久磁石形回転電機。3. A permanent magnet type rotating electric machine comprising: a plurality of high magnetic flux density magnetic poles projecting from a yoke at equal intervals; and a high coercive force magnetic pole fixed to the tips of the high magnetic flux density magnetic poles.
密度磁性磁極と、この高磁束密度磁性磁極の円周方向の
端部に固定される高保持力磁極を備えた永久磁石形回転
電機。4. A permanent magnet having a plurality of high magnetic flux density magnetic poles protruding from a yoke at equal intervals, and a high coercive force magnetic pole fixed to end portions in the circumferential direction of the high magnetic flux density magnetic poles. Type rotating electric machine.
密度磁性磁極と、この高磁束密度磁性磁極の先端に固定
される耐熱性磁極を備えた永久磁石形回転電機。5. A permanent magnet type rotating electric machine comprising: a plurality of high magnetic flux density magnetic poles projecting from a yoke at equal intervals; and a heat resistant magnetic pole fixed to the tip of the high magnetic flux density magnetic poles.
密度磁性磁極と、この高磁束密度磁性磁極の円周方向の
端部に固定される耐熱性磁極を備えた永久磁石形回転電
機。6. A permanent magnet type having a plurality of high magnetic flux density magnetic poles protruding from a yoke at equal intervals, and a heat resistant magnetic pole fixed to circumferential end portions of the high magnetic flux density magnetic poles. Rotating electric machine.
磁性磁極と、この低抵抗磁性磁極の先端に固定される高
抵抗磁性磁極を備えた永久磁石形回転電機。7. A permanent magnet type rotating electric machine comprising a plurality of low resistance magnetic poles protruding from a yoke at equal intervals and a high resistance magnetic pole fixed to the tip of the low resistance magnetic pole.
数の磁極板を軸方向に絶縁接着剤で接合し磁極を形成し
てなる永久磁石形回転電機。8. A permanent magnet type rotating electric machine in which a plurality of magnetic pole plates, at least the outer surface of which is formed in an arc shape, are axially joined with an insulating adhesive to form magnetic poles.
磁性材としたことを特徴とする請求項８に記載の永久磁
石形回転電機。9. The permanent magnet type rotating electric machine according to claim 8, wherein the magnetic pole plate at the end in the axial direction is made of a high-strength magnetic material.
縁接着剤で接合し磁極を形成してなる永久磁石形回転電
機。10. A permanent magnet type rotating electric machine comprising a plurality of strip-shaped magnetic pole plates joined in the circumferential direction with an insulating adhesive to form magnetic poles.
保磁力磁極板としたことを特徴とする請求項１０に記載
の永久磁石形回転電機。11. The permanent magnet type rotating electric machine according to claim 10, wherein the magnetic pole plate at the end in the circumferential direction is a high coercive force magnetic pole plate.
強度磁性材としたことを特徴とする請求項１１に記載の
永久磁石形回転電機。12. The permanent magnet type rotating electric machine according to claim 11, wherein the magnetic pole plate at the end in the circumferential direction is made of a high-strength magnetic material.
度磁極と、この低強度磁極の軸方向の端部に設けられた
高強度磁極を備えた永久磁石形回転電機。13. A permanent magnet type rotating electric machine comprising: a plurality of low-strength magnetic poles protruding from a yoke at equal intervals; and high-strength magnetic poles provided at axial end portions of the low-strength magnetic poles.
度磁極と、この低強度磁極の円周方向の端部に設けられ
た高強度磁極を備えた永久磁石形回転電機。14. A permanent magnet type rotating electric machine comprising: a plurality of low strength magnetic poles protruding from a yoke at equal intervals; and high strength magnetic poles provided at ends of the low strength magnetic poles in a circumferential direction.
度磁極板と、この高強度磁極板の先端に設けられた低強
度磁極を備えた永久磁石形回転電機。15. A permanent magnet type rotating electric machine comprising a plurality of high-strength magnetic pole plates protruding from a yoke at equal intervals, and low-strength magnetic poles provided at the tips of the high-strength magnetic pole plates.
電動機としたことを特徴とする請求項３乃至請求項１５
のいずれかに記載の永久磁石形回転電機。16. The permanent magnet type electric motor is a permanent magnet type electric motor, and the permanent magnet type electric machine is a permanent magnet type electric motor.
The permanent magnet type rotating electrical machine according to any one of 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7144345A JPH08340651A (en) | 1995-06-12 | 1995-06-12 | Permanent magnet, and permanent magnet rotating machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7144345A JPH08340651A (en) | 1995-06-12 | 1995-06-12 | Permanent magnet, and permanent magnet rotating machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08340651A true JPH08340651A (en) | 1996-12-24 |
Family
ID=15359957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7144345A Pending JPH08340651A (en) | 1995-06-12 | 1995-06-12 | Permanent magnet, and permanent magnet rotating machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08340651A (en) |
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| EP0860929A2 (en) * | 1997-02-21 | 1998-08-26 | Aisin Aw Co., Ltd. | Permanent magnet type synchronous motor |
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