JPS62213538A - Rotor of synchronous motor - Google Patents

Rotor of synchronous motor

Info

Publication number
JPS62213538A
JPS62213538A JP61054880A JP5488086A JPS62213538A JP S62213538 A JPS62213538 A JP S62213538A JP 61054880 A JP61054880 A JP 61054880A JP 5488086 A JP5488086 A JP 5488086A JP S62213538 A JPS62213538 A JP S62213538A
Authority
JP
Japan
Prior art keywords
rotor
pole piece
rotor core
magnetic flux
magnetomotive force
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.)
Granted
Application number
JP61054880A
Other languages
Japanese (ja)
Other versions
JPH0759138B2 (en
Inventor
Yoshiaki Hachisuga
蜂須賀 良明
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.)
National Institute of Advanced Industrial Science and Technology AIST
Original Assignee
Agency of Industrial Science and Technology
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 Agency of Industrial Science and Technology filed Critical Agency of Industrial Science and Technology
Priority to JP61054880A priority Critical patent/JPH0759138B2/en
Publication of JPS62213538A publication Critical patent/JPS62213538A/en
Publication of JPH0759138B2 publication Critical patent/JPH0759138B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

PURPOSE:To prevent a peak torque from reducing due to an armature reaction magnetomotive force by cutting the portion of a pole piece except the route of a main magnetic flux in a triangular shape, and forming a wedge-shaped cutout at the pole piece, thereby alleviating the superposition of a rotor. CONSTITUTION:A pole piece (rotor core) (a) has a circular-arc surface 6, and is cut in a triangular shape except a portion that a magnetic flux is concentrated by a main magnetic flux passing therethrough to alleviate the superposition of a rotor core. A wedge-shaped cutout is formed at the extension of the triangular-shaped cut portion to enhance the magnetic resistance of a magnetic path for passing an armature reaction magnetomotive force so that the magnetic path is not saturated by the magnetomotive force to reduce the peak torque of a motor. Further, projections 3, 4 are formed on the axial center and air gap sides of each rotor core, and a permanent magnet (b) is disposed between the projections 3 and 4 of the adjacent rotor core.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、交流サーボモータ等に用いられる同期電動機
の回転子に関するものである。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a rotor for a synchronous motor used in an AC servo motor or the like.

(従来の技術) ロボットや数値制御装置(NC装置)を用いた工作機械
等には、サーボモータが負荷の駆動源として設置されて
いる。このサーボモータとじては、コストが安く制御装
置も簡単に構成できる直流サーボモータが多用されてい
るが、直流サーボモータは機械的整流機構を有している
ため、刷子と整流子面との接触圧力の調整、刷子摩耗粉
の除去、刷子の交換等、定期的な点検保守を必要とする
。このため、メインテナンスフリーを特徴とする交流サ
ーボモータが各方面で使用されてきている。このうち、
銹導電動機を用いた交流サーボモータは、高速域での定
出力制御が可能という長所を有する反面、すべりを検出
して速度制御を行なわなければならないので、制御装置
が相当に複雑になるという問題がある。したがって、高
性能の磁性材料1例えばサマリウムコバルト磁石等の開
発と相まって磁石回転型の同期電動機が交流サーボモー
タとして用いる例が増加してきている。
(Prior Art) A servo motor is installed as a drive source for a load in a robot or a machine tool using a numerical control device (NC device). As for this servo motor, DC servo motors are often used because they are low in cost and have easy-to-configure control devices. However, since DC servo motors have a mechanical commutation mechanism, contact between the brush and commutator surface is Regular inspection and maintenance is required, such as adjusting pressure, removing brush wear particles, and replacing brushes. For this reason, AC servo motors, which are maintenance-free, have been used in various fields. this house,
AC servo motors using rust-conducting motors have the advantage of being able to control constant output in high-speed ranges, but have the problem that the control device becomes quite complex because it has to detect slippage and control the speed. There is. Therefore, with the development of high-performance magnetic materials such as samarium cobalt magnets, magnet-rotating synchronous motors are increasingly being used as AC servo motors.

(発明が解決しようとする聞届点) 交流サーボモータとして用いられる磁石回転型の同JD
Ha動機の回転子としては、FJ4図、及び第5図に示
すような構造のものが採用されていた。
(Points to be solved by the invention) Magnet rotating type JD used as an AC servo motor
The rotor of the Ha motive had a structure as shown in Fig. FJ4 and Fig. 5.

第4図は、シャフトCに複数の互層の永久磁石すを固定
したものである。また、第5図は、シャフトcに、磁極
片(回転子コア)aと永久磁石すとを交互に配置して固
定したもので、磁束集中形の構成としている。このよう
な磁束集中形の構成とすると、 (1)回転子と固定子との間のギャップの磁束密度を最
適値に設計しやすい、 (2)磁石が回転子コアにより周囲を囲まれるので、磁
石の回転子コアへの保持が確実で信頼性が高い、 (3)棒状の磁石が使用できるので、特殊加工を必要と
しない、 等の特徴があるため、交流サーボモータとしては、磁束
集中型の磁石型同期電動機が用いられる場合が多い。
In FIG. 4, a plurality of alternating layers of permanent magnets are fixed to a shaft C. Further, in FIG. 5, magnetic pole pieces (rotor core) a and permanent magnets are alternately arranged and fixed on a shaft c, and the structure is of a magnetic flux concentration type. With such a magnetic flux concentration type configuration, (1) it is easy to design the magnetic flux density of the gap between the rotor and stator to an optimal value; (2) the magnets are surrounded by the rotor core; As AC servo motors, magnetic flux concentrated type Magnet type synchronous motors are often used.

しかしながら、この形式の同期電動機は、回転子コア部
分が電機子反作用磁路を形成するため、コアが飽和して
電動機のピークトルクが減少するという問題がある。そ
こで1本発明はこのような従来技術の問題点の解消を目
的とし、重量を軽減すると共に電機子反作用起磁力によ
るピークトルクの減少を防止した同期電動機の回転子を
提供するものである。
However, in this type of synchronous motor, since the rotor core portion forms an armature reaction magnetic path, there is a problem that the core is saturated and the peak torque of the motor is reduced. One object of the present invention is to solve the problems of the prior art, and to provide a rotor for a synchronous motor that is light in weight and prevents a decrease in peak torque due to armature reaction magnetomotive force.

(問題点を解決するための手段) 本発明は、空隙を介して固定子鉄心と対向する円弧面を
有する複数の磁極片、該磁極片と交互に配置され、磁極
片の軸心側及び空隙側に回転方向に形成された突出部間
で支持される永久磁石よりなるものにおいて、磁極片の
主磁束の経路以外の部分を三角状にカットすると共に、
電機子反作用起磁力の生ずる磁路にくさび状の切り込み
を形成したことを特徴とする、同期電動機の回転子を提
供することにより、前記した従来技術の問題点を解消す
るものである。
(Means for Solving the Problems) The present invention provides a plurality of magnetic pole pieces each having an arcuate surface facing a stator core through an air gap, arranged alternately with the magnetic pole pieces, and arranged on the axis side of the magnetic pole pieces and the air gap. In a permanent magnet supported between protrusions formed on the side in the rotational direction, the part other than the main magnetic flux path of the pole piece is cut into a triangular shape, and
The problems of the prior art described above are solved by providing a rotor for a synchronous motor, characterized in that wedge-shaped notches are formed in the magnetic path where the armature reaction magnetomotive force is generated.

(作用) 本発明の同期電動機の回転子は、磁極片の主磁束の経路
以外の部分を三角状にカットすると共に、電機子反作用
起磁力を生ずる磁路にくさび状の切り込みを形成するこ
とにより、回転子重量を軽減し、トルク特性を改善する
(Function) The rotor of the synchronous motor of the present invention is produced by cutting the portion of the magnetic pole piece other than the main magnetic flux path into a triangular shape and forming wedge-shaped cuts in the magnetic path that generates the armature reaction magnetomotive force. , reduce rotor weight and improve torque characteristics.

(実施例) 以下、図により本発明の一実施例について説明する。第
1図は本発明の回転子磁極の構成図である。
(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of the rotor magnetic poles of the present invention.

図に示すように、磁極片(回転子コア)は、円弧面(6
)を有し主磁束が通って磁束を集中させる部分以外は、
斜線(2)の部分を三角形状にカットして、回転子コア
の重量を軽減する。また、回転子コアには、三角形状に
カットした部分の延長部にくさび状の切り込みを設け、
電機子反作用起磁力を通す磁路の磁気抵抗を高くして、
電機子反作用起磁力により磁路が飽和して電動機のピー
クトルクが減少しないようにする。
As shown in the figure, the magnetic pole piece (rotor core) has a circular arc surface (6
), except for the part where the main magnetic flux passes through and concentrates the magnetic flux.
The hatched area (2) is cut into a triangular shape to reduce the weight of the rotor core. In addition, the rotor core has a wedge-shaped cut in the extension of the triangular cut part.
By increasing the magnetic resistance of the magnetic path that passes the armature reaction magnetomotive force,
Prevent the peak torque of the motor from decreasing due to saturation of the magnetic path due to armature reaction magnetomotive force.

さらに、各回転子コアの軸心側(4)及び空隙側(3)
には回転方向に突出部を設け、隣接する回転子コアの突
出部(3)、(4)間に永久磁石を配置することにより
、押え板を用いることなく、永久磁石が遠心力により回
転子コアから離脱しないようにする。
Furthermore, the axis side (4) and the gap side (3) of each rotor core
By providing a protrusion in the direction of rotation and placing a permanent magnet between the protrusions (3) and (4) of adjacent rotor cores, the permanent magnets can move the rotor by centrifugal force without using a holding plate. Avoid leaving the core.

第2図は、固定子と本発明の回転子との配置関係を示す
図である。また、第3図は、電流と出力トルクとの関係
を示す特性図である6図において、(a)は電機子反作
用のない理想的な電流/トルクカーブ、(b)は回転子
コアにくさび状の切り込みがある場合の電流/トルクカ
ーブ、(C)はくさび状の切り込みがない場合の電流/
トルクカーブである。この特性曲線から、本発明の回転
子構造が電流/トルク特性を改善していることがわかる
FIG. 2 is a diagram showing the arrangement relationship between the stator and the rotor of the present invention. In addition, Fig. 3 is a characteristic diagram showing the relationship between current and output torque. Current/torque curve when there is a wedge-shaped notch, (C) is the current/torque curve when there is no wedge-shaped notch.
This is a torque curve. This characteristic curve shows that the rotor structure of the present invention improves the current/torque characteristics.

(発明の効果) 以上、本発明によれば、主磁束の経路以外の磁極片の部
分を三角状にカットして回転子重量を軽減すると共に、
磁極片にくさび状の切り込みを設けることにより、電機
子反作用起磁力によるピークトルクの減少を防止し、ト
ルク特性を改善できる。
(Effects of the Invention) As described above, according to the present invention, the portion of the magnetic pole piece other than the main magnetic flux path is cut into a triangular shape to reduce the weight of the rotor, and
By providing a wedge-shaped cut in the magnetic pole piece, it is possible to prevent a decrease in peak torque due to armature reaction magnetomotive force and improve torque characteristics.

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

第1図は本発明の回転子の要部構成図、第2図は固定子
と回転子の全体配置図、第3図は特性図、第4図、第5
図は従来例の回転子の構成図である。 a・・・磁極片、b・・・永久磁石、C・・・シャフト
。 特許出願人  工業技術院長 等々力 達筆1図 (f) 第2図 Cσ 第4図 第5図
Figure 1 is a configuration diagram of the main parts of the rotor of the present invention, Figure 2 is an overall layout diagram of the stator and rotor, Figure 3 is a characteristic diagram, Figures 4 and 5.
The figure is a configuration diagram of a conventional rotor. a...Magnetic pole piece, b...Permanent magnet, C...Shaft. Patent applicant Director of the Agency of Industrial Science and Technology Todoroki Handwriting Figure 1 (f) Figure 2 Cσ Figure 4 Figure 5

Claims (1)

【特許請求の範囲】[Claims] 空隙を介して固定子鉄心と対向する円弧面を有する複数
の磁極片、該磁極片と交互に配置され、磁極片の軸心及
び空隙側に回転方向に形成された突出部間で支持される
永久磁石よりなるものにおいて、磁極片の主磁束の経路
以外の部分を三角状にカットすると共に、電機子反作用
起磁力の生ずる磁路にくさび状の切り込みを形成したこ
とを特徴とする、同期電動機の回転子。
A plurality of magnetic pole pieces each having an arcuate surface facing the stator core through an air gap, arranged alternately with the magnetic pole pieces and supported between protrusions formed in the rotational direction on the axis of the magnetic pole piece and on the air gap side. A synchronous motor made of permanent magnets, characterized in that a portion of the magnetic pole piece other than the main magnetic flux path is cut into a triangular shape, and a wedge-shaped cut is formed in the magnetic path where armature reaction magnetomotive force is generated. rotor.
JP61054880A 1986-03-14 1986-03-14 Synchronous motor rotor Expired - Lifetime JPH0759138B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61054880A JPH0759138B2 (en) 1986-03-14 1986-03-14 Synchronous motor rotor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61054880A JPH0759138B2 (en) 1986-03-14 1986-03-14 Synchronous motor rotor

Publications (2)

Publication Number Publication Date
JPS62213538A true JPS62213538A (en) 1987-09-19
JPH0759138B2 JPH0759138B2 (en) 1995-06-21

Family

ID=12982898

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61054880A Expired - Lifetime JPH0759138B2 (en) 1986-03-14 1986-03-14 Synchronous motor rotor

Country Status (1)

Country Link
JP (1) JPH0759138B2 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03503114A (en) * 1988-03-02 1991-07-11 ハイデルベルク、モートル、ゲゼルシャフト、フュール、エネルギーコンベルテル、ミット、ベシュレンクテル、ハフツング electric machine
JPH04164U (en) * 1990-04-13 1992-01-06
JPH05111203A (en) * 1991-10-18 1993-04-30 Fanuc Ltd Structure of radial type rotor of synchronous motor
WO1993026076A1 (en) * 1992-06-08 1993-12-23 Fanuc Ltd Rotor for synchronous motor
US6703745B2 (en) * 2001-09-10 2004-03-09 Adlee Powertronic Co, Ltd. Rotor structure for a motor having built-in type permanent magnet
JP2014180096A (en) * 2013-03-14 2014-09-25 Hitachi Industrial Equipment Systems Co Ltd Permanent magnet dynamo-electric machine and elevator drive hoist
WO2022038750A1 (en) * 2020-08-20 2022-02-24 三菱電機株式会社 Rotating electrical machine

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03503114A (en) * 1988-03-02 1991-07-11 ハイデルベルク、モートル、ゲゼルシャフト、フュール、エネルギーコンベルテル、ミット、ベシュレンクテル、ハフツング electric machine
JPH04164U (en) * 1990-04-13 1992-01-06
JPH05111203A (en) * 1991-10-18 1993-04-30 Fanuc Ltd Structure of radial type rotor of synchronous motor
WO1993026076A1 (en) * 1992-06-08 1993-12-23 Fanuc Ltd Rotor for synchronous motor
US5378953A (en) * 1992-06-08 1995-01-03 Fanuc Ltd. Rotor for synchronous motor
US6703745B2 (en) * 2001-09-10 2004-03-09 Adlee Powertronic Co, Ltd. Rotor structure for a motor having built-in type permanent magnet
JP2014180096A (en) * 2013-03-14 2014-09-25 Hitachi Industrial Equipment Systems Co Ltd Permanent magnet dynamo-electric machine and elevator drive hoist
WO2022038750A1 (en) * 2020-08-20 2022-02-24 三菱電機株式会社 Rotating electrical machine

Also Published As

Publication number Publication date
JPH0759138B2 (en) 1995-06-21

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