JPH01186196A - Speed controller for motor - Google Patents
Speed controller for motorInfo
- Publication number
- JPH01186196A JPH01186196A JP63007506A JP750688A JPH01186196A JP H01186196 A JPH01186196 A JP H01186196A JP 63007506 A JP63007506 A JP 63007506A JP 750688 A JP750688 A JP 750688A JP H01186196 A JPH01186196 A JP H01186196A
- Authority
- JP
- Japan
- Prior art keywords
- inverter
- inverters
- motor
- motors
- average value
- 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
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】 （発明の目的） （産業上の利用分野） 本発明は電動機の速度制御装置に関する。[Detailed description of the invention] (Purpose of the invention) (Industrial application field) The present invention relates to a speed control device for an electric motor.
（従来の技術）
大容量電動機１台にて駆動した場合、電動機の出力トル
クが大きくなる為機械の軸強度上非常に不経済となる様
な機械や機械の構造上大容量電動機を設置できない様な
機械を駆動する場合複数台の電動機を用いていた。(Prior art) When driven by a single large-capacity electric motor, the output torque of the motor increases, making it extremely uneconomical due to the shaft strength of the machine. Due to the structure of the machine, it is not possible to install a large-capacity electric motor. When driving a machine, multiple electric motors were used.
この複数台の電動機をインバータによって可変速する場
合、１台のインバータで複数台の電動機を駆動する方法
や、電動機１台に対して１台のインバータを設けて複数
台の１対１対応した電動機とインバータ群にて駆動する
方法が採用されていた。When changing the speed of multiple electric motors using an inverter, there are two methods: driving multiple electric motors with one inverter, and providing one inverter for one electric motor to provide one-to-one correspondence between multiple electric motors. A method of driving with a group of inverters was adopted.
（発明が解決しようとする課題）
然るに、従来の可変速駆動方式では、１台のインバータ
で複数台の電動機を駆動した場合、各々の電動機にかか
る負荷の不均衡により、過負荷となった電動機にて機械
を損傷する場合がある事の他、各電動機に対して１台イ
ンバータを設けた場合、各々のインバータの設定の不均
衡や各々の電動機の特性の不均衡により、常に回生運転
となるインバータや過負荷運転となるインバータが出現
し可変速運転ができないという事があった。(Problem to be Solved by the Invention) However, in the conventional variable speed drive system, when multiple electric motors are driven by one inverter, the electric motors become overloaded due to imbalance in the loads applied to each electric motor. In addition to the possibility of damaging the machine, if one inverter is installed for each motor, regenerative operation will always occur due to imbalance in the settings of each inverter and imbalance in the characteristics of each motor. In some cases, variable speed operation was not possible due to the appearance of inverters and inverters that caused overload operation.
本発明はこれらの不具合を解消し、複数台の電動機にて
駆動される機械を円滑に可変速運転することを目的とす
る。The present invention aims to eliminate these problems and smoothly operate a machine driven by a plurality of electric motors at variable speeds.
（課題を解決するための手段）
本発明は、各々のインバータの出力電流を検出し、その
検出された出力電流の平均値を平均値演算回路にて求め
、比較演算回路にてその求められた出力電流の平均値と
各々のインバータの出力電流より各々のインバータの最
適電圧基準を求め、基準出力回路にて各々のインバータ
に各々の最適電圧基準と周波数基準を出力する電動機の
速度制御装置である。(Means for Solving the Problems) The present invention detects the output current of each inverter, calculates the average value of the detected output currents using an average value calculation circuit, and calculates the average value of the detected output currents using a comparison calculation circuit. This is a motor speed control device that determines the optimal voltage standard for each inverter from the average value of the output current and the output current of each inverter, and outputs each optimal voltage standard and frequency standard to each inverter in a standard output circuit. .
（作 用）
平均値演算回路及び比較演算回路により最適電圧基準を
求め、各インバータの出力電流を等しくし、過負荷運転
となるインバータをなくし、各々の電動機の負荷平衡を
とり、又、基準出力回路より同一周波数基準を各々のイ
ンバータに出力していることにより回生運転となるイン
バータをなくする。(Function) The optimum voltage standard is determined by the average value calculation circuit and the comparison calculation circuit, the output current of each inverter is made equal, no inverter is overloaded, the load of each motor is balanced, and the standard output The circuit outputs the same frequency reference to each inverter, eliminating the need for inverters to operate regeneratively.
（実施例）
本発明の一実施例を第１図乃至第２図を用いて説明する
。(Example) An example of the present invention will be described with reference to FIGS. 1 and 2.
第１図は本発明の一実施例を示す制御ブロック図であり
、第２図は第１図の基準演算回路１の内部詳細図である
。FIG. 1 is a control block diagram showing one embodiment of the present invention, and FIG. 2 is a detailed internal diagram of the reference arithmetic circuit 1 shown in FIG.
基準演算回路１は平均値演算回路２、比較演算回路３及
び基準出力回路４から成る。The reference calculation circuit 1 includes an average value calculation circuit 2, a comparison calculation circuit 3, and a reference output circuit 4.
機械５は複数台の電動機６と継手７によって接続されて
おり電動機６．１台に対して１台インバータ８が接続さ
れている。The machine 5 is connected to a plurality of electric motors 6 through joints 7, and one inverter 8 is connected to each electric motor 6.
インバータ８の出力電流１１．Ｉ２．Ｉ３・・・・・・
ＩＮは電流検出器８より検出される。この出力電流１１
．Ｉ２．Ｉ３・・・・・・ＩＮは前述の平均値演算回路
２及び比較演算回路３に入力される。Output current of inverter 8 11. I2. I3...
IN is detected by the current detector 8. This output current 11
．． I2. I3...IN is input to the above-mentioned average value calculation circuit 2 and comparison calculation circuit 3.
平均値演算回路２は入力された出力電流ｈ 。The average value calculation circuit 2 receives the input output current h.
Ｉ２．Ｉ３・・・・・・ＩＮの平均値ＩＡを求め比較演
算比較演算回路３は各々のインバータ７の出力電流１１
、Ｉ２．Ｉ３・・・・・・ＩＮと平均値ＩＡを比較し最
適電圧基準Ｖ１１． Ｖ２１． Ｖ３１・・・・・・、
ＶＮｌを求め基準用か回路４へ出力する。I2. I3...The average value IA of IN is calculated and compared.The comparison calculation circuit 3 calculates the output current 11 of each inverter 7.
, I2. I3...IN is compared with the average value IA and the optimum voltage standard V11. V21. V31......
VNl is determined and output to the reference circuit 4.
最適電圧基準Ｖ１１〜ＶＮ１は比例定数Ｋ、出力電流１
１．Ｉ２．Ｉ３・・・・・・ＩＮ及び平均値ＩＡより・
・・・・・・・・■
基準出力回路３は周波数設定器１０より周波数基準ｆ１
及び比較演算回路４より最適電圧基準■１１゜Ｖ２１．
Ｖ３１・・・・・・、ＶＮｌを入力し、各々のインバ
ータ７へ同一の周波数指令値ｆと各々の最適電圧指令値
Ｖ１．Ｖ２ 、Ｖ３・・・・・・ＶＮを出力する。この
最適電圧基準Ｖ１１． Ｖ２１． Ｖ３１・・・・・・
、ＶＮｌにより各々のインバータ７の出力電流１１，１
２．Ｉ３・・・・・・ＩＮは等しくなり各々の電動機の
負荷は均衡する。Optimal voltage standards V11 to VN1 are proportional constant K and output current 1
1. I2. I3... From IN and average value IA...
......■ The reference output circuit 3 uses the frequency reference f1 from the frequency setter 10.
and the optimum voltage reference ■11°V21.
V31..., VNl are input, and the same frequency command value f and each optimum voltage command value V1. V2, V3... Outputs VN. This optimum voltage reference V11. V21. V31...
, VNl, the output current 11,1 of each inverter 7
2. I3...IN are equal, and the loads on each motor are balanced.
本発明により、周波数基準を同一とし各々のインバータ
の電圧基準を変えることにより、各々の電動機の特性を
考慮した負荷平衡が実現でき、１台の機械を複数台の電
動機にて円滑に可変速運転することができる。According to the present invention, by keeping the frequency standard the same and changing the voltage standard of each inverter, it is possible to achieve load balancing that takes into account the characteristics of each motor, and one machine can be smoothly operated at variable speed with multiple motors. can do.
第１図は本発明の一実施例を示す速度制御装置の構成図
、第２図は基準演算回路の詳細な構成図、第３図は他の
実施例を示す構成図である。
１・・・基準演算回路 ２・・・平均値演算回路３
・・・比較演算回路 ４・・・基準出力回路８・・
・インバータ ９・・・電流検出器１０・・・周
波数設定器
代理人 弁理士 則 近 憲 侑
同 山王 −
第２図FIG. 1 is a block diagram of a speed control device showing one embodiment of the present invention, FIG. 2 is a detailed block diagram of a reference arithmetic circuit, and FIG. 3 is a block diagram showing another embodiment. 1...Reference calculation circuit 2...Average value calculation circuit 3
...Comparison calculation circuit 4...Reference output circuit 8...
・Inverter 9...Current detector 10...Frequency setting device Representative Patent attorney Noriyuki Chika Yudo Sanno - Figure 2
Claims (1)
動機の１台に対応してそれぞれ１台のインバータを有す
る電動機の速度制御装置において、前記インバータの出
力電流を検出する電流検出器と、前記インバータの出力
電流の平均値を演算する平均値演算回路と、前記インバ
ータの出力電流及び前記インバータの出力電流の平均値
より前記インバータの電圧基準を演算する電圧基準演算
回路と、前記インバータに周波数基準及び電圧基準を出
力する基準出力回路とを具備してなる電動機の速度制御
装置。In a motor speed control device having a plurality of motors connected to one machine and one inverter corresponding to each of the motors, a current detector for detecting an output current of the inverter; , an average value calculation circuit that calculates an average value of the output current of the inverter; a voltage reference calculation circuit that calculates a voltage reference of the inverter from the output current of the inverter and the average value of the output current of the inverter; A speed control device for an electric motor, comprising a reference output circuit that outputs a frequency reference and a voltage reference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63007506A JPH01186196A (en) | 1988-01-19 | 1988-01-19 | Speed controller for motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63007506A JPH01186196A (en) | 1988-01-19 | 1988-01-19 | Speed controller for motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01186196A true JPH01186196A (en) | 1989-07-25 |
Family
ID=11667671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63007506A Pending JPH01186196A (en) | 1988-01-19 | 1988-01-19 | Speed controller for motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01186196A (en) |
-
1988
- 1988-01-19 JP JP63007506A patent/JPH01186196A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0538182A (en) | Elevator system | |
| JP4146172B2 (en) | Elevator control device | |
| CN106549621B (en) | Control system and control method of induction motor with electronic pole changing function | |
| JPH01186196A (en) | Speed controller for motor | |
| JPH0733342A (en) | Control device for elevator | |
| JPS63114507A (en) | Control method of vehicle | |
| JPH0558586A (en) | Driving gear for crane running electric motor | |
| JP2015033188A (en) | Drive system for induction motor | |
| JP3591118B2 (en) | Drive control device for electric vehicles | |
| JPH02299499A (en) | Control method for series connected inverter | |
| JP2645159B2 (en) | Induction machine control device | |
| JP3302844B2 (en) | Common power inverter control device | |
| JPH04190689A (en) | Controller for inverter | |
| JPH07177610A (en) | Controller for electric vehicle | |
| JP2024011852A (en) | Power conversion device and power conversion method, and elevator | |
| JPH0336992A (en) | Speed controller of inverter for elevator | |
| JP2835055B2 (en) | Electric car control device | |
| JPH08331854A (en) | Apparatus for parallel operation of a plurality of inverters | |
| SU1495666A1 (en) | Bench for dynamic testing of vehicles | |
| JPS6352696A (en) | Ac variable speed device in dc bus system | |
| JPS60255091A (en) | Drive device of plural motors | |
| JPH02151203A (en) | Inverter controller | |
| JPS6036717B2 (en) | Electric car speed control device | |
| JPH01234098A (en) | Ac motor controller | |
| SU1420639A1 (en) | D.c. multiple-motor traction electric drive |