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JPH0817542B2 - Rotating electric machine - Google Patents

Rotating electric machine

Info

Publication number
JPH0817542B2
JPH0817542B2 JP63163408A JP16340888A JPH0817542B2 JP H0817542 B2 JPH0817542 B2 JP H0817542B2 JP 63163408 A JP63163408 A JP 63163408A JP 16340888 A JP16340888 A JP 16340888A JP H0817542 B2 JPH0817542 B2 JP H0817542B2
Authority
JP
Japan
Prior art keywords
electric machine
torque
motor
magnets
rotating electric
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.)
Expired - Lifetime
Application number
JP63163408A
Other languages
Japanese (ja)
Other versions
JPH0213243A (en
Inventor
茂一 阪部
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP63163408A priority Critical patent/JPH0817542B2/en
Publication of JPH0213243A publication Critical patent/JPH0213243A/en
Publication of JPH0817542B2 publication Critical patent/JPH0817542B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

【発明の詳細な説明】 [産業上の利用分野] この発明は回転電機、とくに脈動負荷トルクに対応
し、回転むらを是正する回転電機に関するものである。
The present invention relates to a rotary electric machine, and more particularly to a rotary electric machine that responds to pulsating load torque and corrects rotational unevenness.

[従来の技術] 第3図は、例えば予稿集「昭和62年電気学会全国大
会」676に記載された従来の回転電機を示す構成図であ
る。図において、(1)は固定子、(2)は回転子、
(3)は磁極を構成する磁石である。
[Prior Art] FIG. 3 is a block diagram showing a conventional rotary electric machine described in, for example, a proceedings collection "Showa 1987 National Conference of the Institute of Electrical Engineers of Japan" 676. In the figure, (1) is a stator, (2) is a rotor,
(3) is a magnet forming a magnetic pole.

また、第4図(a)は従来の回転電機を、例えば圧縮機
のような脈動する負荷に連結した場合の、回転電機の発
生トルク(以下、モータ発生トルクと記す)と負荷トル
クとの関係を示す特性図であり、実線Aは負荷トルク
を、破線Bはモータ発生トルクである。なお、横軸はロ
ータ変位角、縦軸はトルクの大きさを示す。
FIG. 4 (a) shows the relationship between the torque generated by the rotating electric machine (hereinafter referred to as the motor generated torque) and the load torque when the conventional rotating electric machine is connected to a pulsating load such as a compressor. Is a characteristic diagram showing the load torque, the solid line A is the load torque, and the broken line B is the motor generated torque. The horizontal axis represents the rotor displacement angle and the vertical axis represents the magnitude of torque.

[発明が解決しようとする課題] 従来の回転電機は以上のように構成されていたので、
第4図(a)実線Aに示すような、一回転中に変動する
負荷トルクに対しては、負荷トルクがモータ発生トルク
より大きい瞬間(C)には、第4図(b)に示すように
回転数がやや小さくなり、回転むらが生じるといった問
題点があった。
[Problems to be Solved by the Invention] Since the conventional rotating electric machine is configured as described above,
As shown by the solid line A in FIG. 4 (a), as shown in FIG. 4 (b) at the moment (C) when the load torque is larger than the motor-generated torque, the load torque fluctuates during one rotation. However, there was a problem that the number of rotations became a little small and uneven rotation occurred.

この発明は上記のような問題点を解決するためになさ
れたものであり、負荷トルクの高いところでモータ発生
トルクも大きくなるようにして、時々刻々の負荷トルク
とモータ発生トルクの差をより小さくし、回転むらを極
小にすることを目的としている。
The present invention has been made in order to solve the above-mentioned problems, and also makes the motor-generated torque large at a high load torque to further reduce the difference between the load torque and the motor-generated torque every moment. , The purpose is to minimize the uneven rotation.

[課題を解決するための手段] この発明に係わる回転電機は、回転子の中心を固定子
の中心より偏心させると共に、上記回転子の磁石のうち
の少なくとも1つの磁石における寸法または磁気エネル
ギーを、他の磁石に対して異なるようにして、負荷トル
クのピークとモータ発生トルクのピークが一致するよう
に構成したものである。
[Means for Solving the Problems] A rotating electric machine according to the present invention is configured such that the center of a rotor is eccentric from the center of a stator, and the size or magnetic energy of at least one of the magnets of the rotor is It is configured such that the peak of the load torque and the peak of the torque generated by the motor coincide with each other by making them different from the other magnets.

[作用] この発明における回転子は、その中心が固定子の中心
に対して偏心し、かつ少なくとも1つの磁極における寸
法または磁気エネルギーが、他の磁極に対して異なるの
で、モータ発生トルクは一定値ではなく、一回転中に変
動する。従って、負荷トルクの高いところでモータ発生
トルクも大きくなるようにすれば、回転むらが抑えられ
る。
[Operation] In the rotor according to the present invention, the center of the rotor is eccentric with respect to the center of the stator, and the size or magnetic energy of at least one magnetic pole is different from that of the other magnetic pole. Instead, it fluctuates during one revolution. Therefore, if the motor-generated torque is also increased at a high load torque, uneven rotation can be suppressed.

[実施例] 以下、この発明の一実施例による回転電機を図につい
て説明する。
[Embodiment] A rotary electric machine according to an embodiment of the present invention will be described below with reference to the drawings.

第1図(a)(b)は各々この発明の一実施例による回
転電機を示す構成図であり、第1図(a)と第1図
(b)は回転子の位置が180°異なる瞬間を示してい
る。図において、(3a)(3b)(3c)(3d)は各々回転
子(2)の磁極を構成する磁石であり、その中心O2
固定子(1)の中心O1より矢印の方向に偏心してい
る。また、磁石(3a)は他の磁石(3b)(3c)(3d)よ
り厚みが大きい。従って、磁石(3a)は、偏心により第
1図(a)では、固定子(1)と回転子(2)とのギャ
ップが最も小となっているところに位置し、第1図
(b)では、上記ギャップが最も大となっているところ
へ位置する。第2図はこの発明の一実施例による回転電
機を、脈動する負荷に連結した場合の、モータ発生トル
クと負荷トルクとの関係を示す特性図であり、実線Aは
負荷トルクを、破線Bはモータ発生トルクである。第2
図の破線Bにおいて、第1図(a)に示すように磁石
(3a)が、ギャップが小のところに位置する場合(第2
図中、Dの位置)は、モータ発生トルクは大となり、第
1図(b)に示すように磁石(3a)が、ギャップが大の
ところに位置する場合(第2図中、Eの位置)は、モー
タ発生トルクは逆に小となる。従って、このような特性
の回転電機を、第2図に示すように、そのモータ発生ト
ルクが最大となる時に負荷トルクも最大となるよう、脈
動する負荷と連結すれば、モータ発生トルクと負荷トル
クとの差が縮まり、回転むらが是正される。
1 (a) and 1 (b) are configuration diagrams showing a rotary electric machine according to an embodiment of the present invention, respectively. FIG. 1 (a) and FIG. 1 (b) show the moment when the rotor position is different by 180 °. Is shown. In the figure, (3a), (3b), (3c), and (3d) are magnets that respectively constitute the magnetic poles of the rotor (2), and the center O 2 is in the direction of the arrow from the center O 1 of the stator (1). It is eccentric. The magnet (3a) is thicker than the other magnets (3b) (3c) (3d). Therefore, the magnet (3a) is located at the position where the gap between the stator (1) and the rotor (2) is the smallest in Fig. 1 (a) due to the eccentricity, and Fig. 1 (b). Then, it is located where the gap is the largest. FIG. 2 is a characteristic diagram showing the relationship between the motor-generated torque and the load torque when the rotating electric machine according to the embodiment of the present invention is connected to a pulsating load. The solid line A indicates the load torque, and the broken line B indicates the relationship. This is the torque generated by the motor. Second
When the magnet (3a) is located at a small gap as shown in FIG.
At the position D in the figure), the torque generated by the motor is large, and the magnet (3a) is located at a large gap as shown in FIG. 1 (b) (position E at the position in FIG. 2). ), The torque generated by the motor is conversely small. Therefore, as shown in FIG. 2, if a rotating electric machine having such characteristics is connected to a pulsating load so that the load torque becomes maximum when the motor generated torque becomes maximum, the motor generated torque and the load torque can be increased. The difference between and is reduced, and uneven rotation is corrected.

なお、上記実施例では磁石の数は4つの場合を示した
が、その数は複数であればよく、また、そのうち寸法が
異なる磁石は1つでなくともよい。2つ以上の場合、そ
の位置は負荷トルクの特性に対応して選べばよい。
Although the number of magnets is four in the above embodiment, the number of magnets may be plural, and the number of magnets having different dimensions is not limited to one. If there are two or more, the positions may be selected according to the characteristics of the load torque.

さらに、磁石(3a)に対応する磁石としては、上記実
施例のように厚みを変えたものでなくてもよく、寸法は
他の磁石と同じで、磁気エネルギーが他の磁石より強い
磁石を用いるようにしてもよい。
Further, as the magnet corresponding to the magnet (3a), it is not necessary to change the thickness as in the above embodiment, the size is the same as that of the other magnet, and the magnetic energy is stronger than the other magnet. You may do it.

[発明の効果] 以上のように、この発明によれば回転子の中心を固定子
の中心より偏心させると共に、上記回転子の磁石のうち
の少なくとも1つの磁石における寸法または磁気エネル
ギーを、他の磁石に対して異なるようにして、負荷トル
クのピークとモータ発生トルクのピークが一致するよう
に回転電機を構成したので、回転むらを小さくでき、振
動や騒音が小さく、効率のよい回転電機が得られる効果
がある。
As described above, according to the present invention, the center of the rotor is decentered from the center of the stator, and the size or magnetic energy of at least one of the magnets of the rotor is changed to another value. Since the rotating electric machine is configured so that the peak of the load torque and the peak of the motor-generated torque are different for the magnets, uneven rotation can be reduced, vibration and noise are small, and an efficient rotating electric machine can be obtained. It is effective.

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

第1図(a)(b)は各々この発明の一実施例による回
転電機を示す構成図、第2図はこの発明の一実施例によ
る回転電機を、脈動する負荷に連結した場合の、モータ
発生トルクと負荷トルクとの関係を示す特性図、第3図
は従来の回転電機を示す構成図、第4図(a)は従来の
回転電機を脈動する負荷に連結した場合の、モータ発生
トルクと負荷トルクとの関係を示す特性図、及び第4図
(b)は従来の回転電機を脈動する負荷に連結した場合
の、回転数の変化を示す特性図である。 図において、(1)は固定子、(2)は回転子、(3a)
(3b)(3c)(3d)は磁石である。 なお、図中、同一符号は同一または相当部分を示す。
1 (a) and 1 (b) are configuration diagrams showing a rotary electric machine according to an embodiment of the present invention, and FIG. 2 is a motor when the rotary electric machine according to an embodiment of the present invention is connected to a pulsating load. FIG. 3 is a characteristic diagram showing the relationship between generated torque and load torque, FIG. 3 is a configuration diagram showing a conventional rotary electric machine, and FIG. 4 (a) is a motor generated torque when the conventional rotary electric machine is connected to a pulsating load. FIG. 4B is a characteristic diagram showing the relationship between the load torque and the load torque, and FIG. 4B is a characteristic diagram showing the change in the rotation speed when the conventional rotating electric machine is connected to a pulsating load. In the figure, (1) is a stator, (2) is a rotor, and (3a)
(3b) (3c) (3d) are magnets. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】複数の磁石で構成される回転子と固定子よ
りなり、脈動する負荷を駆動する回転電機において、上
記回転子の中心を上記固定子の中心より偏心させると共
に、上記回転子の磁石のうちの少なくとも1つの磁石に
おける寸法または磁気エネルギーを、他の磁石に対して
異なるようにして、負荷トルクのピークとモータ発生ト
ルクのピークが一致するように構成したことを特徴とす
る回転電機。
1. A rotating electric machine comprising a rotor composed of a plurality of magnets and a stator for driving a pulsating load, wherein the center of the rotor is eccentric from the center of the stator, and A rotary electric machine characterized in that at least one of the magnets has a size or magnetic energy different from those of the other magnets so that the peak of the load torque and the peak of the motor-generated torque coincide with each other. .
JP63163408A 1988-06-30 1988-06-30 Rotating electric machine Expired - Lifetime JPH0817542B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63163408A JPH0817542B2 (en) 1988-06-30 1988-06-30 Rotating electric machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63163408A JPH0817542B2 (en) 1988-06-30 1988-06-30 Rotating electric machine

Publications (2)

Publication Number Publication Date
JPH0213243A JPH0213243A (en) 1990-01-17
JPH0817542B2 true JPH0817542B2 (en) 1996-02-21

Family

ID=15773326

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63163408A Expired - Lifetime JPH0817542B2 (en) 1988-06-30 1988-06-30 Rotating electric machine

Country Status (1)

Country Link
JP (1) JPH0817542B2 (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0448140Y2 (en) * 1986-01-09 1992-11-12

Also Published As

Publication number Publication date
JPH0213243A (en) 1990-01-17

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