JPH09182394A - Ac motor feeding system - Google Patents
Ac motor feeding systemInfo
- Publication number
- JPH09182394A JPH09182394A JP9001912A JP191297A JPH09182394A JP H09182394 A JPH09182394 A JP H09182394A JP 9001912 A JP9001912 A JP 9001912A JP 191297 A JP191297 A JP 191297A JP H09182394 A JPH09182394 A JP H09182394A
- Authority
- JP
- Japan
- Prior art keywords
- motor
- winding
- phase
- winding groups
- unit power
- 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
Landscapes
- Induction Machinery (AREA)
- Control Of Ac Motors In General (AREA)
- Inverter Devices (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電力変換装置を介
して給電される交流電動機給電システム、特にその多重
化技術に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an AC motor power feeding system that is fed by a power converter, and more particularly to a multiplexing technique thereof.
【０００２】[0002]
【従来の技術】大容量の交流可変速駆動システムを実現
する場合、単位電力変換装置を複数台組合わせて容量増
大を図る多重化技術がある。多重化の方法としては、一
般に、単位電力変換装置を直列あるいは並列に接続する
方法が知られている。2. Description of the Related Art In order to realize a large capacity AC variable speed drive system, there is a multiplexing technique for increasing the capacity by combining a plurality of unit power converters. As a multiplexing method, a method of connecting unit power converters in series or in parallel is generally known.
【０００３】[0003]
【発明が解決しようとする課題】しかし、直列接続の場
合では各々の単位電力変換装置の電圧分担が平均化せ
ず、また並列接続の場合では各々の単位電力変換装置の
電流分担が平均化せず、これらはいずれも負荷に供給可
能な電力を低減させる原因になるという問題がある。な
お、電圧分担や電流分担を改善する方法も知られている
が、そのためには付帯的な機器を必要とし、装置コスト
が高くなる。However, in the case of series connection, the voltage sharing of each unit power converter is not averaged, and in the case of parallel connection, the current sharing of each unit power converter is not averaged. However, there is a problem that all of them cause reduction in the power that can be supplied to the load. A method of improving the voltage sharing and the current sharing is also known, but for that purpose, an auxiliary device is required, and the device cost increases.
【０００４】ここで、単位電力変換装置として３相出力
電圧形インバータを用いた場合を例に挙げて、多重化す
る場合の問題点を具体的に説明する。図５は２台の３相
出力電圧形トランジスタインバータ２１，２２を、出力
端子でリアクトル４を介して並列接続した例である。な
お、１は直流電源、３は交流電動機である。ここで、リ
アクトル４は各単位インバータ２１，２２の電流を平均
化する作用を持つが、当然、リアクトル分だけ装置コス
トが増加する。また、リアクトルによる電圧降下分だけ
負荷の交流電動機３に供給される電力が低減するため、
そのインダクタンスを大きくして電流の平均化効果を強
めようとすると、電圧降下の増加という観点から逆効果
となることもある。Here, the problem in the case of multiplexing will be concretely described by taking the case of using a three-phase output voltage type inverter as a unit power converter. FIG. 5 is an example in which two three-phase output voltage type transistor inverters 21 and 22 are connected in parallel via the reactor 4 at the output terminals. In addition, 1 is a DC power supply and 3 is an AC electric motor. Here, the reactor 4 has a function of averaging the currents of the unit inverters 21 and 22, but naturally the device cost increases by the amount of the reactor. Further, since the electric power supplied to the AC motor 3 of the load is reduced by the voltage drop due to the reactor,
If the inductance is increased to enhance the current averaging effect, it may have an adverse effect from the viewpoint of increasing the voltage drop.
【０００５】一方、電力変換装置を多重化せずに、大容
量の複数の電力変換装置で駆動する方法もあるが、一般
に知られている方法では負荷の交流電動機を多相電動機
としなければならない。例えば、６相電動機を２台の３
相出力電力変換装置で駆動する事例は多く見受けられ
る。しかし、この場合は汎用的な３相電動機を用いるこ
とができないために、電動機設計や製造面でコスト増と
なることがある。On the other hand, there is also a method of driving a plurality of power converters of large capacity without multiplexing the power converters, but in the generally known method, the AC motor of the load must be a multi-phase motor. . For example, two 6-phase motors
There are many cases of driving with a phase output power converter. However, in this case, since a general-purpose three-phase electric motor cannot be used, the cost may increase in terms of motor design and manufacturing.
【０００６】そこで、本発明の課題は、電力変換装置の
電圧および電流責務を変えることなく、かつ汎用的な電
動機を用いて多重化効果を持たせた交流電動機給電シス
テムを提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide an AC motor power feeding system which has a multiplexing effect by using a general-purpose motor without changing the voltage and current responsibilities of the power converter.
【０００７】[0007]
【課題を解決するための手段】このような課題は、本発
明によれば、極数が４以上の交流電動機巻線を、少なく
とも１つの極対を含む複数の巻線群に分割し、かつ各巻
線群の相互の磁気結合を小さくすべき各巻線群を互いに
異なる極に位置させ、該巻線群の各々へ個々の単位電力
変換装置から個別に給電し、その際各単位電力変換装置
から電動機に供給する電流または電圧の基本波成分を互
いにほぼ同一位相，同一値となるように制御することに
よって解決される。According to the present invention, such an object is to divide an AC motor winding having four or more poles into a plurality of winding groups including at least one pole pair, and The winding groups for which mutual magnetic coupling of the winding groups should be reduced are located at different poles from each other, and each of the winding groups is individually fed with power from each unit power converter. This can be solved by controlling the fundamental wave components of the current or voltage supplied to the motor so that they have almost the same phase and the same value.
【０００８】本発明は、極数が４以上である交流電動機
において、各々の極対あるいは複数の極対を構成する巻
線群を単位巻線群としてこの単位巻線群に個々の単位電
力変換装置から給電することにより、多重化を実現する
ものである。このようにすれば、従来の電力変換装置を
直接多重化する場合のように、複数の単位電力変換装置
の電圧分担や電流分担の不均等による電力変換装置の容
量低下がなく、かつ汎用的な電動機を若干の結線を変更
するのみでその適用が可能となるために、電動機設計や
製造面でのコスト増もなくすことができる。According to the present invention, in an AC motor having four or more poles, a group of windings forming each pole pair or a plurality of pole pairs is used as a unit winding group, and individual unit power conversion is performed for this unit winding group. Multiplexing is realized by supplying power from the device. With this configuration, as in the case of directly multiplexing the conventional power conversion device, there is no reduction in capacity of the power conversion device due to uneven voltage sharing or current sharing of the plurality of unit power converting devices, and the power conversion device is versatile. Since the application of the electric motor can be achieved by only changing the wiring of the electric motor slightly, it is possible to reduce the cost in terms of the electric motor design and manufacturing.
【０００９】[0009]
【発明の実施の形態】次に、本発明の実施形態を図面に
基づいて詳細に説明する。図１は本発明の実施形態を示
す概略構成図、図２は図１の巻線展開図で示した交流電
動機の極の配置及び巻線群の位置関係を示す概略図、図
３は図１のＵ相電流波形例を示す波形図、図４は本発明
の実施形態を説明するために対比される従来の結線を示
す構成図である。なお、図１において、１は直流電源、
２１，２２は単位電力変換装置、３は交流電動機であ
り、交流電動機３は４極３相交流電動機としてその巻線
展開図で示している。また、図４において、４は電力変
換装置である。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings. 1 is a schematic configuration diagram showing an embodiment of the present invention, FIG. 2 is a schematic diagram showing the arrangement of poles and a positional relationship of winding groups of the AC motor shown in the winding development view of FIG. 1, and FIG. FIG. 4 is a waveform diagram showing a U-phase current waveform example of FIG. 4, and FIG. 4 is a configuration diagram showing a conventional connection which is compared to explain the embodiment of the present invention. In FIG. 1, 1 is a DC power supply,
21 and 22 are unit power converters, 3 is an AC electric motor, and the AC electric motor 3 is shown as a four-pole three-phase AC electric motor in its winding development view. Moreover, in FIG. 4, 4 is a power converter.
【００１０】図１及び図２から明らかなように、電動機
３は図４に示す電動機３の極間接続部が端子に引き出さ
れ、各々の極対群（Ｕ1 ，Ｖ1 ，Ｗ1 とＵ2 ，Ｖ2 ，Ｗ
2 ）が別々の単位電力変換装置から給電される。このよ
うに、図１の交流電動機３は図４の汎用的な３相交流電
動機３に対して、鉄心や巻線自体は殆ど変更されておら
ず、電動機設計や製造に関するコスト増は殆どない。ま
た、図１の単位電力変換装置２１，２２間に循環電流は
存在しないので、単位電力変換装置の所要容量は図５の
場合の１／２の容量でよい。なお、２台の単位電力変換
装置２１，２２は電力を有効に使うために、各電力変換
装置から供給する各相の電流（または電圧）の基本波成
分は図３に示す如く同一位相，同一値であるのがよく、
これは例えば従来の電流フィードバック制御等により容
易に達成できる。As is apparent from FIGS. 1 and 2, the motor 3 shown in FIG. 4 has a pole-to-pole connecting portion of the motor 3 drawn out to a terminal, and each pole pair group (U 1 , V 1 , W 1 and U). 2 , V 2 , W
2 ) is fed from separate unit power converters. As described above, the AC motor 3 of FIG. 1 is almost unchanged from the general-purpose three-phase AC motor 3 of FIG. 4 in the iron core and the winding itself, and there is almost no increase in cost related to motor design and manufacturing. Further, since there is no circulating current between the unit power converters 21 and 22 in FIG. 1, the required capacity of the unit power converter may be 1/2 the capacity in the case of FIG. Since the two unit power converters 21 and 22 effectively use electric power, the fundamental wave component of the current (or voltage) of each phase supplied from each power converter has the same phase and the same as shown in FIG. It should be a value,
This can be easily achieved, for example, by conventional current feedback control.
【００１１】その他の構成例としては、６極３相交流電
動機を３台の３相単位電力変換装置で給電する場合、８
極３相交流電動機を２台の３相単位電力変換装置で給電
する場合、又は、８極３相交流電動機を４台の３相単位
電力変換装置で給電する場合など種々の構成例が考えら
れる。また、ここで用いる交流電動機としては誘導電動
機，同期電動機のいずれでもよく、電力変換装置として
は電圧形インバータの他、サイクロコンバータやサイリ
スタモータ給電用の変換装置等を適用でき、特定の変換
装置に限定されるものではない。As another configuration example, when power is supplied to a 6-pole 3-phase AC motor by three 3-phase unit power converters, 8
Various configuration examples are conceivable, such as when the pole 3-phase AC motor is fed by two 3-phase unit power converters, or when the 8-pole 3-phase AC motor is fed by four 3-phase unit power converters. . The AC motor used here may be either an induction motor or a synchronous motor, and as the power converter, a voltage converter, a cycloconverter, a converter for thyristor motor power supply, or the like can be applied. It is not limited.
【００１２】[0012]
【発明の効果】本発明によれば、多重化を行うための特
別な付帯機器を用いることなく、汎用的な電動機の結線
を若干変えるだけで実現でき、しかも複数の単位電力変
換装置の電圧および電流分担を等しくすることが可能な
ので、低コストの多重化交流電動機給電システムを提供
し得る利点がもたらされる。According to the present invention, it is possible to realize a general-purpose electric motor by slightly changing the wiring without using any special auxiliary equipment for performing multiplexing, and the voltage of a plurality of unit power converters and Since the current sharing can be made equal, there is an advantage that a low-cost multiplex AC motor power supply system can be provided.
【図１】本発明の実施形態を示す概略構成図FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention.
【図２】交流電動機の極の配置及び巻線群の位置関係を
示す概略図FIG. 2 is a schematic diagram showing the arrangement of poles of an AC motor and the positional relationship of winding groups.
【図３】図１のＵ相電流波形例を示す波形図FIG. 3 is a waveform diagram showing an example of the U-phase current waveform of FIG.
【図４】本発明の実施形態を説明するために対比される
従来の結線を示す構成図FIG. 4 is a configuration diagram showing a conventional connection, which is compared to explain an embodiment of the present invention.
【図５】電圧形インバータの２重化構成例を示す構成図FIG. 5 is a configuration diagram showing a dual configuration example of a voltage source inverter.
１ 直流電源 ２ 電力変換装置 ２１、２２ 単位電力変換装置 ３ 交流電動機 ４ リアクトル 1 DC power supply 2 Power converter 21, 22 Unit power converter 3 AC motor 4 Reactor
Claims (1)
とも１つの極対を含む複数の巻線群に分割し、かつ各巻
線群の相互の磁気結合を小さくすべき各巻線群を互いに
異なる極に位置させ、該巻線群の各々へ個々の単位電力
変換装置から個別に給電し、その際各単位電力変換装置
から電動機に供給する電流または電圧の基本波成分を互
いにほぼ同一位相，同一値となるように制御することを
特徴とする交流電動機給電システム。1. An AC motor winding having four or more poles is divided into a plurality of winding groups including at least one pole pair, and each winding group is to have a small mutual magnetic coupling. They are located at different poles, and each of the winding groups are individually fed with power from individual unit power converters. At that time, the fundamental wave components of the current or voltage supplied from each unit power converter to the motor are almost in phase with each other. , AC motor power supply system characterized by controlling so as to have the same value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9001912A JPH09182394A (en) | 1997-01-09 | 1997-01-09 | Ac motor feeding system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9001912A JPH09182394A (en) | 1997-01-09 | 1997-01-09 | Ac motor feeding system |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62141547A Division JPH088791B2 (en) | 1987-06-08 | 1987-06-08 | AC motor power supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09182394A true JPH09182394A (en) | 1997-07-11 |
Family
ID=11514803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9001912A Pending JPH09182394A (en) | 1997-01-09 | 1997-01-09 | Ac motor feeding system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09182394A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1808958A2 (en) | 2006-01-14 | 2007-07-18 | Converteam Ltd | Drive circuits |
| FR2939983A1 (en) * | 2008-12-11 | 2010-06-18 | Liebherr Aerospace Toulouse Sa | DEVICE WITH POLYPHASE ELECTRIC MACHINE AND ELECTRIC MACHINE THEREFOR |
| JP2013504293A (en) * | 2009-09-03 | 2013-02-04 | プロティアン エレクトリック リミテッド | Electric motor and generator |
| WO2017020177A1 (en) * | 2015-07-31 | 2017-02-09 | 深圳市大疆创新科技有限公司 | Motor control circuit and method, motor system, unmanned aerial vehicle and control method thereof |
| WO2018181945A1 (en) * | 2017-03-30 | 2018-10-04 | アイシン・エィ・ダブリュ株式会社 | Driving apparatus |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63305792A (en) * | 1987-06-08 | 1988-12-13 | Fuji Electric Co Ltd | Feed system of ac motor |
-
1997
- 1997-01-09 JP JP9001912A patent/JPH09182394A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63305792A (en) * | 1987-06-08 | 1988-12-13 | Fuji Electric Co Ltd | Feed system of ac motor |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1808958A3 (en) * | 2006-01-14 | 2008-06-04 | Converteam Ltd | Drive circuits |
| EP1808958A2 (en) | 2006-01-14 | 2007-07-18 | Converteam Ltd | Drive circuits |
| US8564238B2 (en) | 2008-12-11 | 2013-10-22 | Liebherr-Aerospace Toulouse Sas | Device with a polyphase electrical machine, and related electrical machine |
| FR2939983A1 (en) * | 2008-12-11 | 2010-06-18 | Liebherr Aerospace Toulouse Sa | DEVICE WITH POLYPHASE ELECTRIC MACHINE AND ELECTRIC MACHINE THEREFOR |
| WO2010067021A3 (en) * | 2008-12-11 | 2010-12-02 | Liebherr-Aerospace Toulouse Sas | Device with a polyphase electrical machine, and related electrical machine |
| JP2016077147A (en) * | 2009-09-03 | 2016-05-12 | プロティアン エレクトリック リミテッドＰｒｏｔｅａｎ Ｅｌｅｃｔｒｉｃ Ｌｉｍｉｔｅｄ | Electric motor and electric generator |
| JP2013504293A (en) * | 2009-09-03 | 2013-02-04 | プロティアン エレクトリック リミテッド | Electric motor and generator |
| WO2017020177A1 (en) * | 2015-07-31 | 2017-02-09 | 深圳市大疆创新科技有限公司 | Motor control circuit and method, motor system, unmanned aerial vehicle and control method thereof |
| WO2018181945A1 (en) * | 2017-03-30 | 2018-10-04 | アイシン・エィ・ダブリュ株式会社 | Driving apparatus |
| CN110402530A (en) * | 2017-03-30 | 2019-11-01 | 爱信艾达株式会社 | Driving device |
| JPWO2018181945A1 (en) * | 2017-03-30 | 2019-11-07 | アイシン・エィ・ダブリュ株式会社 | Drive device |
| US10951151B2 (en) | 2017-03-30 | 2021-03-16 | Aisin Aw Co., Ltd. | Drive device |
| CN110402530B (en) * | 2017-03-30 | 2021-09-10 | 爱信艾达株式会社 | Drive device |
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