JPH1189137A - Permanent magnet type motor - Google Patents

Permanent magnet type motor

Info

Publication number
JPH1189137A
JPH1189137A JP9257808A JP25780897A JPH1189137A JP H1189137 A JPH1189137 A JP H1189137A JP 9257808 A JP9257808 A JP 9257808A JP 25780897 A JP25780897 A JP 25780897A JP H1189137 A JPH1189137 A JP H1189137A
Authority
JP
Japan
Prior art keywords
permanent magnet
rotor core
type motor
center
permanent magnets
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.)
Withdrawn
Application number
JP9257808A
Other languages
Japanese (ja)
Inventor
Kenji Narita
憲治 成田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu General Ltd
Original Assignee
Fujitsu General Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fujitsu General Ltd filed Critical Fujitsu General Ltd
Priority to JP9257808A priority Critical patent/JPH1189137A/en
Publication of JPH1189137A publication Critical patent/JPH1189137A/en
Withdrawn legal-status Critical Current

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Landscapes

  • Permanent Magnet Type Synchronous Machine (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Brushless Motors (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

PROBLEM TO BE SOLVED: To improve the holding strength of permanent magnets in the rotor core of a permanent magnet type motor, to suppress the distortion of magnetic flux clue to the permanent magnets and to reduce spactial harmonics component. SOLUTION: In the inner rotor type permanent magnet type motor, permanent magnets 12 just equal in member to the number of poles are embedded in a circumferential direction along the outer diameter of a rotor core 11, at least the centers of the permanent magnets 12 are swelled in the center direction of the rotor core 11 and the center part of a bridging part which supports the permanent magnets 12 is enlarged. A space between the permanent magnets 12 and the outer periphery of the rotor core is thickened so as to improve the holding strength of the permanent magnets. Then, the width of the magnetizing direction in the permanent magnets 12 is made larger forwards the center and the end parts are made smaller closer to the end. The magnetic flux waveforms of the magnetic poles are approximated to a sine wave with less distortion.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】この発明はコンプレッサ等に
用いる永久磁石形モータに係り、特に詳しくは磁石埋込
型界磁鉄心(ロータコア)の永久磁石を適切なな形状と
し、高効率化を可能とした永久磁石形モータに関するも
のである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a permanent magnet type motor used for a compressor or the like, and more particularly, to a permanent magnet of a magnet-embedded field iron core (rotor core) having an appropriate shape to enable high efficiency. Pertinent permanent magnet type motor.

【0002】[0002]

【従来の技術】この種の永久磁石形モータにはインナー
ロータ型のものがあり、これはステータコア内にロータ
コアを配置している。例えば、図4に示すように、ロー
タコア1には極数分の永久磁石2が配置される。なお、
中心孔3はモータのシャフト用のものである。
2. Description of the Related Art There is an inner rotor type of this type of permanent magnet type motor in which a rotor core is disposed in a stator core. For example, as shown in FIG. 4, permanent magnets 2 for the number of poles are arranged on the rotor core 1. In addition,
The center hole 3 is for a motor shaft.

【0003】図4において、ロータコア1の外径に沿っ
て円弧状の孔を明け、その孔に永久磁石2を埋設するた
め、ロータコア1の外周に残された薄い壁(厚さ;t
a)によって永久磁石2を保持することになる。しか
し、その保持部の壁の強度が弱く、永久磁石2に作用す
る遠心力に耐えきれないこともある。そこで、例えば図
5に示すように、円弧状でなく、板状の永久磁石4を用
いることにより、ロータコア1の外周に残された壁をt
b(>ta)と厚くし、永久磁石4の保持部の壁の強度
を強くしたものがある。なお、図中、5はフラックスバ
リアである。
In FIG. 4, an arc-shaped hole is formed along the outer diameter of the rotor core 1 and a thin wall (thickness: t) left on the outer periphery of the rotor core 1 in order to bury the permanent magnet 2 in the hole.
According to a), the permanent magnet 2 is held. However, the strength of the wall of the holding portion is so weak that it may not be able to withstand the centrifugal force acting on the permanent magnet 2. Therefore, for example, as shown in FIG. 5, by using a plate-shaped permanent magnet 4 instead of an arc shape, the wall left on the outer periphery of the rotor core 1 is removed by t.
b (> ta), and the strength of the wall of the holding portion of the permanent magnet 4 is increased. In the figure, reference numeral 5 denotes a flux barrier.

【0004】[0004]

【発明が解決しようとする課題】しかしながら、前記永
久磁石形モータにおいては、永久磁石2,4の着磁方向
の幅が中央部と端部とで同じ(Wa,Wb)であるにも
かかわらず、隣接する永久磁石2,4においてその中央
部の磁路長が端部の磁路長より長くなるため、磁力線が
中央部が端部より弱いものとなる。つまり、永久磁石
2,4による磁束波形が歪み、正弦波から遠のくことに
なり、ひいては空間高調波成分の増大を招くことにな
り、モータの効率上好ましくない。
However, in the permanent magnet type motor, the widths of the permanent magnets 2 and 4 in the direction of magnetization are the same (Wa, Wb) at the center and the end. Since the magnetic path length at the center of the adjacent permanent magnets 2 and 4 is longer than the magnetic path length at the ends, the lines of magnetic force are weaker at the center than at the ends. That is, the magnetic flux waveforms generated by the permanent magnets 2 and 4 are distorted and become far from a sine wave, which leads to an increase in spatial harmonic components, which is not preferable in terms of motor efficiency.

【0005】この発明は前記課題に鑑みなされたもので
あり、その目的はロータコアの磁石の保持壁の強度を上
げることができ、またその磁石による磁束波形を正弦波
に近づけることができ、ひいては空間高調波成分を低減
することができ、モータの効率向上を図ることができる
ようにした永久磁石形モータを提供することにある。
SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to increase the strength of a magnet holding wall of a rotor core, to make a magnetic flux waveform of the magnet close to a sine wave, and to achieve a space. An object of the present invention is to provide a permanent magnet type motor capable of reducing harmonic components and improving the efficiency of the motor.

【0006】[0006]

【課題を解決するための手段】前記目的を達成するため
に、この発明のロータコアを内部に有する永久磁石形モ
ータにおいて、該永久磁石形モータの極数分だけ板状の
永久磁石を前記ロータコアの外径に沿って円周方向に埋
込み、かつ前記永久磁石の着磁方向の幅をその中央ほど
大きくしてなることを特徴としている。
In order to achieve the above object, in a permanent magnet type motor having a rotor core therein according to the present invention, plate-shaped permanent magnets of the same number as the number of poles of the permanent magnet type motor are provided. The permanent magnet is embedded in the circumferential direction along the outer diameter, and the width of the permanent magnet in the magnetization direction is increased toward the center.

【0007】この発明はステータコア内に磁石埋込型界
磁鉄心(ロータコア)を配置してなる永久磁石形モータ
において、該永久磁石形モータの極数分だけ板の永久磁
石を前記ロータコアの外径に沿って円周方向に埋込み、
かつ少なくとも前記永久磁石の中央を前記ロータコアの
中心方向に膨らませ、該永久磁石を支持する橋絡部(同
永久磁石とロータコアの外周との間の厚さ)を大きく
し、前記永久磁石の着磁方向の幅をその中央ほど大きく
するとともに、その端部ほど小さくするようにしたこと
を特徴としている。
According to the present invention, in a permanent magnet type motor having a magnet core embedded in a stator core (rotor core), the number of poles of the plate is equal to the number of poles of the permanent magnet type motor. Embedded circumferentially along
In addition, at least the center of the permanent magnet is expanded toward the center of the rotor core, and a bridging portion (thickness between the permanent magnet and the outer periphery of the rotor core) for supporting the permanent magnet is increased to magnetize the permanent magnet. It is characterized in that the width in the direction is made larger at the center and smaller at the ends.

【0008】この場合、前記ロータコアは前記永久磁石
の形状孔および中心孔を含めて電磁鋼板をプレスによっ
て打ち抜き、該打ち抜いた電磁鋼板を積層するととも
に、前記永久磁石を埋設するとよい。また、前記永久磁
石を埋設したロータコアを組み込んでDCブラシレスモ
ータとするとよい。
In this case, it is preferable that the rotor core is formed by punching out a magnetic steel sheet including a shape hole and a center hole of the permanent magnet by pressing, laminating the punched magnetic steel sheets, and burying the permanent magnet. Further, a DC brushless motor may be provided by incorporating a rotor core in which the permanent magnet is embedded.

【0009】[0009]

【発明の実施の形態】以下、この発明の実施の形態を図
1ないし図3を参照して詳しく説明する。この発明の永
久磁石形モータは、インナーロータ型モータのロータコ
アに埋込む磁石の形状を変えればその磁石の磁束が変わ
り、各磁石の着磁方向の幅を中央部ほど大きくし、その
端部ほど小さくすれば、隣接する磁石による磁束が中央
部と端部とで同じ程度にでき、またその中央部をロータ
コアの中心方向に膨らまることにより、ロータコアと磁
石との間(橋絡分)についてその中央部に対抗するロー
タコア部分が厚くなり、磁石の保持強度を高めることが
できることに着目したものである。
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to FIGS. In the permanent magnet type motor of the present invention, if the shape of the magnet embedded in the rotor core of the inner rotor type motor is changed, the magnetic flux of the magnet changes, the width of each magnet in the magnetizing direction is increased toward the center, and toward the end. If it is made smaller, the magnetic flux by the adjacent magnets can be made the same at the center part and the end part, and by expanding the center part toward the center of the rotor core, the magnetic flux between the rotor core and the magnet (bridge) can be reduced. The present invention focuses on the fact that the rotor core portion opposing the center portion becomes thicker and the holding strength of the magnet can be increased.

【0010】そのために、図1および図2に示すよう
に、この永久磁石形モータはステータコア10の中にロ
ータコア11を配置するインナーロータ型のモータであ
り、ロータコア11にはそのモータの極数(例えば4
極)に合わせて4つの永久磁石12を外径に沿って円周
方向に埋込んである。なお、13は中心孔(シャフト用
の孔)、14はフラックスバリアである。フラックスバ
リア14はロータコア11の外径側で、隣接する永久磁
石12の間に設けられており、磁束の短絡、漏洩を防止
する。また、図1に示すステータコア10は16スロッ
トであるが、それに限らず、またそのステータコア10
には必要な巻線が施される。また、各永久磁石12の位
置は図5に示す永久磁石4の位置にほぼ対応している。
For this purpose, as shown in FIGS. 1 and 2, this permanent magnet type motor is an inner rotor type motor in which a rotor core 11 is disposed in a stator core 10, and the number of poles of the motor is For example, 4
4), four permanent magnets 12 are embedded in the circumferential direction along the outer diameter. In addition, 13 is a center hole (a hole for a shaft), and 14 is a flux barrier. The flux barrier 14 is provided between the adjacent permanent magnets 12 on the outer diameter side of the rotor core 11 to prevent short-circuit and leakage of magnetic flux. The stator core 10 shown in FIG. 1 has 16 slots, but is not limited thereto.
Are provided with necessary windings. In addition, the position of each permanent magnet 12 substantially corresponds to the position of the permanent magnet 4 shown in FIG.

【0011】各永久磁石12は中央部の幅(着磁方向
幅)をWc(>Wa;図4参照)と大きくし、その端部
の幅(着磁方向幅)をWd(<Wc)と小さくした板
状、言い替えれば凸レンズ形状になっている。この場
合、各永久磁石12について、ロータコア11の外径側
の面はフラット状に、この反対面(ロータコア11の中
心側の面)は凸状にする。すると、永久磁石12に作用
する遠心力に抗し、その永久磁石12を支持するロータ
コア11の鉄心の橋絡部については、永久磁石12の中
央部に対抗するロータコア11の部分がtc(>ta)
と厚くなり、永久磁石12の端部に対抗するロータコア
11の部分がtd(<tc)と薄くなる。このように、
永久磁石12の中央部に対抗するロータコア11の部分
が厚くなることにより、永久磁石12の保持強度を高め
ることができ、つまり永久磁石12に作用する遠心力に
耐え、結果モータの故障の原因になることもない。
Each of the permanent magnets 12 has a central portion (magnetization direction width) as large as Wc (>Wa; see FIG. 4) and an end portion width (magnetization direction width) as Wd (<Wc). It has a reduced plate shape, in other words, a convex lens shape. In this case, for each permanent magnet 12, the surface on the outer diameter side of the rotor core 11 is flat, and the opposite surface (the surface on the center side of the rotor core 11) is convex. Then, with respect to the bridge portion of the iron core of the rotor core 11 supporting the permanent magnet 12 against the centrifugal force acting on the permanent magnet 12, the portion of the rotor core 11 opposed to the central portion of the permanent magnet 12 has tc (> ta). )
And the portion of the rotor core 11 opposing the end of the permanent magnet 12 becomes thin as td (<tc). in this way,
By increasing the thickness of the portion of the rotor core 11 that opposes the central portion of the permanent magnet 12, the holding strength of the permanent magnet 12 can be increased, that is, it can withstand the centrifugal force acting on the permanent magnet 12, resulting in failure of the motor. It won't be.

【0012】永久磁石12の磁束状態について説明する
と、永久磁石12の中央部を通る磁束を大きくしたいに
もかかわらず、そのパーミンアス(透磁)が小さいこと
から、中央部の着磁方向の幅を大きくし、つまりその中
央部を通る磁束aを大きくし、小さいパーミンアスを補
う働きをする。また、永久磁石12の端部を通る磁束を
小さくしたいにもかかわらず、そのパーミンアス(透
磁)が大きいことから、この端部の着磁方向の幅を小さ
くし、つまりその端部を通る磁束cを小さくし、大きい
パーミンアスを抑える働きをする。
The state of the magnetic flux of the permanent magnet 12 will be described. Despite the desire to increase the magnetic flux passing through the central portion of the permanent magnet 12, the width of the central portion in the direction of magnetization is small because the permeance is small. Enlarged, that is, the magnetic flux a passing through the center thereof is increased, and acts to compensate for the small permeation. Further, despite the fact that the magnetic flux passing through the end of the permanent magnet 12 is desired to be small, the width of the end in the magnetizing direction is reduced because the permeance is large, that is, the magnetic flux passing through the end is reduced. It functions to reduce c and suppress large perma ass.

【0013】このように、永久磁石12の形状は中央部
の幅が最も広く、その端部に行くほど、その幅が狭くな
っていることから、磁極による磁束a,b,cの波形は
歪の少ない正弦波に近いものとなる。換言すれば、永久
磁石12による空隙部(ステータ10の歯と永久磁石1
2との間)の磁束分布を正弦波に近づけることになる。
したがって、空間高調波成分が減少し、当該モータの効
率が向上し、ひいては振動や騒音の低減にもなる。
As described above, the shape of the permanent magnet 12 is such that the width of the central portion is the widest and the width decreases toward the end, so that the waveforms of the magnetic fluxes a, b, and c due to the magnetic poles are distorted. It is close to a sine wave with little. In other words, the gap formed by the permanent magnet 12 (the teeth of the stator 10 and the permanent magnet 1
2) is approximated to a sine wave.
Therefore, spatial harmonic components are reduced, the efficiency of the motor is improved, and vibration and noise are reduced.

【0014】また、図1および図2では、永久磁石12
のロータコア11の外径側の面はフラット状であるが、
その外径側の面に多少膨らませるようにしてもよく、あ
るいはその外径側の面を多少へこませるようにしてもよ
い。なお、その膨らみの程度は永久磁石12の保持強度
を勘案して決め、そのへこませる程度は磁極の磁束波形
を勘案して決める。この場合、磁極の磁束状態をより最
適なもの、つまりより正弦波に近づけることことがで
き、磁束の空間高調波成分をより減少させることができ
る。
1 and 2, the permanent magnet 12
The surface on the outer diameter side of the rotor core 11 is flat,
The outer diameter surface may be slightly swelled, or the outer diameter surface may be slightly dented. The degree of the expansion is determined in consideration of the holding strength of the permanent magnet 12, and the degree of the depression is determined in consideration of the magnetic flux waveform of the magnetic pole. In this case, the magnetic flux state of the magnetic pole can be made more optimal, that is, closer to a sine wave, and the spatial harmonic component of the magnetic flux can be further reduced.

【0015】ところで、前記ロータコア11は、電磁鋼
板をプレスで打ち抜いて積層するが、そのプレスの際に
中心孔(シャフト用の孔)13、フラックスバリア14
の孔および前記永久磁石12の形状孔を打ち抜けばよい
ことから、また永久磁石12を従来同様に研磨で仕上げ
ればよいことから、コスト的には従来と変わらず、つま
りコストアップにならずに済む。また、前述により形成
されるロータコアを組み込んでDCブラシレスモータと
し、空気調和機の圧縮機モータ等として利用すれば、コ
ストをアップすることなく、空気調和機の性能アップ
(運転効率の上昇、振動や騒音の低下)を図ることがで
きる。
The rotor core 11 is formed by stamping and laminating an electromagnetic steel sheet with a press. At the time of the press, a center hole (a hole for a shaft) 13 and a flux barrier 14 are formed.
Hole and the shape hole of the permanent magnet 12, and since the permanent magnet 12 may be polished in the same manner as before, the cost remains the same as before, that is, the cost does not increase. Only In addition, if the rotor core formed as described above is incorporated into a DC brushless motor and used as a compressor motor or the like of an air conditioner, the performance of the air conditioner can be improved (increase in operating efficiency, vibration, Noise reduction).

【0016】[0016]

【発明の効果】以上説明したように、この永久磁石形モ
ータの請求項1記載の発明によると、ステータコア内に
ロータコアを配置した永久磁石形モータの極数分だけ板
状の永久磁石を同ロータコアの外径に沿って円周方向に
埋込み、かつ永久磁石の着磁方向の幅をその中央ほど大
きくしたので、永久磁石による空隙部(ステータの歯と
永久磁石12との間)の磁束分布を正弦波に近づけるこ
とができ、これにより磁束の空間高調波成分が減少し、
当該モータの効率が向上し、ひいては振動や騒音を低減
させることができるという効果があり、また永久磁石の
中央部をロータコアの中心方向に大きくすることによ
り、その中央部に対抗するタコア11の部分が厚くな
り、永久磁石12の保持強度を高め、つまり永久磁石1
2に作用する遠心力に耐え、結果モータの故障の原因を
解消することができるという効果がある。
As described above, according to the first aspect of the present invention, the plate-shaped permanent magnets are replaced by the same number of poles as the number of poles of the permanent magnet type motor in which the rotor core is arranged in the stator core. And the width in the magnetizing direction of the permanent magnet is increased toward the center of the permanent magnet, so that the magnetic flux distribution in the gap (between the teeth of the stator and the permanent magnet 12) by the permanent magnet is reduced. Can be closer to a sine wave, which reduces the spatial harmonic content of the magnetic flux,
There is an effect that the efficiency of the motor is improved, and thus vibration and noise can be reduced, and by increasing the central portion of the permanent magnet toward the center of the rotor core, a portion of the taco 11 that opposes the central portion is provided. Becomes thicker, and the holding strength of the permanent magnet 12 is increased.
2 has the effect of withstanding the centrifugal force acting on the motor 2 and eliminating the cause of the motor failure.

【0017】請求項2記載の発明によると、ステータコ
ア内に磁石埋込型界磁鉄心(ロータコア)を配置してな
る永久磁石形モータにおいて、該永久磁石形モータの極
数分だけ板状の永久磁石を前記ロータコアの外径に沿っ
て円周方向に埋込み、かつ少なくとも前記永久磁石の中
央を前記ロータコアの中心方向に膨らませ、該永久磁石
を支持する橋絡部(同永久磁石とロータコアの外周との
間の厚さ)を大きくし、前記永久磁石の着磁方向の幅を
その中央ほど大きくするとともに、その端部ほど小さく
するようにしたので、ロータコアの永久磁石の保持壁の
強度を上げることができ、つまり永久磁石12に作用す
る遠心力に耐え、結果モータの故障の原因を解消するこ
とができ、しかもその永久磁石による磁束波形を正弦波
に近づけることができ、ひいては空間高調波成分を低減
することができ、モータの効率向上を図ることができる
という効果がある。
According to the second aspect of the present invention, in a permanent magnet type motor in which a magnet-embedded field core (rotor core) is arranged in a stator core, a plate-shaped permanent magnet having the same number of poles as the permanent magnet type motor is provided. A magnet is embedded in the circumferential direction along the outer diameter of the rotor core, and at least the center of the permanent magnet is expanded toward the center of the rotor core, and a bridging portion (the permanent magnet and the outer periphery of the rotor core are supported by the permanent magnet). The thickness in the magnetizing direction of the permanent magnet is increased toward the center and decreased toward the end thereof, so that the strength of the permanent magnet holding wall of the rotor core is increased. That is, it can withstand the centrifugal force acting on the permanent magnet 12 and can eliminate the cause of the motor failure, and can make the magnetic flux waveform by the permanent magnet closer to a sine wave. Come, it is possible to reduce the turn space harmonic components, there is an effect that it is possible to improve the efficiency of the motor.

【0018】請求項3記載の発明によると、請求項1ま
た2において前記ロータコアは前記永久磁石の形状孔お
よび中心孔を含めて電磁鋼板をプレスによって打ち抜
き、該打ち抜いた電磁鋼板を積層するとともに、前記永
久磁石を埋設したので、請求項1または2の効果に加
え、プレスの際に中心孔(シャフト用の孔)および前記
永久磁石の形状孔を打ち抜けばよいことから、また永久
磁石を従来同様に研磨で仕上げればよいことから、コス
ト的には従来と変わらず、つまりコストアップにならず
に済むという効果がある。
According to the third aspect of the present invention, in the first and second aspects, the rotor core is formed by punching an electromagnetic steel sheet including a shape hole and a center hole of the permanent magnet by a press, and the punched electromagnetic steel sheets are laminated. Since the permanent magnet is buried, in addition to the effect of claim 1 or 2, the center hole (shaft hole) and the shape hole of the permanent magnet need only be punched out during pressing. Similarly, since it is only necessary to finish by polishing, there is an effect that the cost is the same as the conventional one, that is, the cost does not increase.

【0019】請求項4記載の発明によると、請求項1ま
たは2において前記永久磁石を埋設したロータコアを組
み込んでDCブラシレスモータとしたので、請求項1ま
たは2の効果に加え、そのDCブラシレスモータを空気
調和機の圧縮機モータ等として利用すれば、コストをア
ップすることなく、空気調和機の性能アップ(運転効率
の上昇、振動や騒音の低下)を図ることができるという
効果がある。
According to the fourth aspect of the present invention, a DC brushless motor is provided by incorporating the rotor core in which the permanent magnet is embedded in the first or second aspect, so that the DC brushless motor is provided in addition to the effect of the first or second aspect. When used as a compressor motor or the like of an air conditioner, there is an effect that the performance of the air conditioner can be improved (increased operation efficiency, reduced vibration and noise) without increasing cost.

【図面の簡単な説明】[Brief description of the drawings]

【図1】この発明の実施の一形態を示す永久磁石形モー
タの概略的平面図。
FIG. 1 is a schematic plan view of a permanent magnet type motor showing an embodiment of the present invention.

【図2】図1に示す永久磁石形モータのロータの概略的
横断面図。
FIG. 2 is a schematic cross-sectional view of the rotor of the permanent magnet type motor shown in FIG.

【図3】図1に示す永久磁石形モータのロータの概略的
縦断面図。
FIG. 3 is a schematic longitudinal sectional view of a rotor of the permanent magnet type motor shown in FIG. 1;

【図4】従来の永久磁石形モータロータの概略的横断面
図。
FIG. 4 is a schematic cross-sectional view of a conventional permanent magnet type motor rotor.

【図5】従来の永久磁石形モータロータの概略的横断面
図。
FIG. 5 is a schematic cross-sectional view of a conventional permanent magnet type motor rotor.

【符号の説明】[Explanation of symbols]

10 ステータコア 11 ロータコア(磁石埋込型界磁鉄心) 12 永久磁石 13 中心孔(シャフト用) 14 フラックスバリア Reference Signs List 10 Stator core 11 Rotor core (magnet embedded field iron core) 12 Permanent magnet 13 Center hole (for shaft) 14 Flux barrier

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 ロータコアを内部に有する永久磁石形モ
ータにおいて、該永久磁石形モータの極数分だけ板状の
永久磁石を前記ロータコアの外径に沿って円周方向に埋
込み、かつ前記永久磁石の着磁方向の幅をその中央ほど
大きくしてなることを特徴とする永久磁石形モータ。
1. A permanent magnet type motor having a rotor core therein, wherein plate-shaped permanent magnets are embedded in the circumferential direction along the outer diameter of the rotor core by the number of poles of the permanent magnet type motor, and A permanent magnet type motor characterized in that the width in the magnetizing direction is increased toward the center.
【請求項2】 ステータコア内に磁石埋込型界磁鉄心
(ロータコア)を配置してなる永久磁石形モータにおい
て、該永久磁石形モータの極数分だけ板状の永久磁石を
前記ロータコアの外径に沿って円周方向に埋込み、かつ
少なくとも前記永久磁石の中央を前記ロータコアの中心
方向に膨らませ、該永久磁石を支持する橋絡部(同永久
磁石とロータコアの外周との間の厚さ)を大きくし、前
記永久磁石の着磁方向の幅をその中央ほど大きくすると
ともに、その端部ほど小さくするようにしたことを特徴
とする永久磁石形モータ。
2. A permanent magnet motor in which a magnet-embedded field iron core (rotor core) is disposed in a stator core, wherein plate-shaped permanent magnets having the same outer diameter as the number of poles of the permanent magnet motor are provided. , And at least the center of the permanent magnet is expanded toward the center of the rotor core to form a bridging portion (thickness between the permanent magnet and the outer periphery of the rotor core) supporting the permanent magnet. A permanent magnet type motor wherein the width in the magnetizing direction of the permanent magnet is increased toward the center thereof and decreased toward the end thereof.
【請求項3】 前記ロータコアは前記永久磁石の形状孔
および中心孔を含めて電磁鋼板をプレスによって打ち抜
き、該打ち抜いた電磁鋼板を積層するとともに、前記永
久磁石を埋設してなる請求項1または2記載の永久磁石
形モータ。
3. The rotor core is formed by punching out a magnetic steel sheet including a shape hole and a center hole of the permanent magnet by pressing, laminating the punched magnetic steel sheets, and burying the permanent magnet. A permanent magnet type motor as described.
【請求項4】 前記永久磁石を埋設したロータコアを組
み込んでDCブラシレスモータとしてなる請求項1また
は2記載の永久磁石形モータ。
4. The permanent magnet type motor according to claim 1, wherein a DC brushless motor is obtained by incorporating a rotor core having the permanent magnet embedded therein.
JP9257808A 1997-09-05 1997-09-05 Permanent magnet type motor Withdrawn JPH1189137A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9257808A JPH1189137A (en) 1997-09-05 1997-09-05 Permanent magnet type motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9257808A JPH1189137A (en) 1997-09-05 1997-09-05 Permanent magnet type motor

Publications (1)

Publication Number Publication Date
JPH1189137A true JPH1189137A (en) 1999-03-30

Family

ID=17311411

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9257808A Withdrawn JPH1189137A (en) 1997-09-05 1997-09-05 Permanent magnet type motor

Country Status (1)

Country Link
JP (1) JPH1189137A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6853106B2 (en) 2000-06-02 2005-02-08 Mitsubishi Heavy Industries, Ltd. Brushless motor
WO2007074036A1 (en) * 2005-12-29 2007-07-05 Arcelik Anonim Sirketi An electric motor
US7482724B2 (en) 2004-02-05 2009-01-27 Mitsubishi Heavy Industries, Ltd. Ipm electric rotating machine
US7635039B2 (en) 2004-01-13 2009-12-22 Mitsubishi Heavy Industries, Ltd. Series hybrid electric vehicle
JP2011147346A (en) * 2011-05-02 2011-07-28 Mitsubishi Electric Corp Electric motor
WO2014104826A1 (en) * 2012-12-28 2014-07-03 주식회사 효성 Rotor of interior permanent magnet motor for preventing leakage flux
JP2016116308A (en) * 2014-12-15 2016-06-23 ダイキン工業株式会社 Rotor of rotary electric machine and rotary electric machine with the same
CN107394925A (en) * 2017-08-30 2017-11-24 广东威灵电机制造有限公司 Rotor iron core lamination, rotor core and rotor
CN107591919A (en) * 2017-08-30 2018-01-16 广东威灵电机制造有限公司 Rotor core and rotor

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6853106B2 (en) 2000-06-02 2005-02-08 Mitsubishi Heavy Industries, Ltd. Brushless motor
US7635039B2 (en) 2004-01-13 2009-12-22 Mitsubishi Heavy Industries, Ltd. Series hybrid electric vehicle
US7482724B2 (en) 2004-02-05 2009-01-27 Mitsubishi Heavy Industries, Ltd. Ipm electric rotating machine
WO2007074036A1 (en) * 2005-12-29 2007-07-05 Arcelik Anonim Sirketi An electric motor
JP2011147346A (en) * 2011-05-02 2011-07-28 Mitsubishi Electric Corp Electric motor
WO2014104826A1 (en) * 2012-12-28 2014-07-03 주식회사 효성 Rotor of interior permanent magnet motor for preventing leakage flux
JP2016116308A (en) * 2014-12-15 2016-06-23 ダイキン工業株式会社 Rotor of rotary electric machine and rotary electric machine with the same
CN107394925A (en) * 2017-08-30 2017-11-24 广东威灵电机制造有限公司 Rotor iron core lamination, rotor core and rotor
CN107591919A (en) * 2017-08-30 2018-01-16 广东威灵电机制造有限公司 Rotor core and rotor

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