JPS5822097U

JPS5822097U - AC motor control device

Info

Publication number: JPS5822097U
Application number: JP1981111314U
Authority: JP
Inventors: 平田　昭生
Original assignee: 株式会社東芝
Priority date: 1981-07-27
Filing date: 1981-07-27
Publication date: 1983-02-10
Also published as: JPH0329992Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は従来の交流電動機の制御装置のブロック図、第
２図は第１図の各部波形図、第３図は本考案を適用する
交流電動機の制御装置の主回路構成図、第４図および第
５図は従来の制御における第３図の各部波形図、第６図
は本考案の一実施例を示すブロック図である。１１、　１１．、　１１゜・・・交流電力の入力端子、
１２．１２□、１２□・・・整流器、１３，１３．。１３゜・・・直流リアクトル、１４，１４．．１４□・
・・インバータ、１５，１５゜・・・同期電動機、１５
１・・・位置検出器、１６１・・・速度基準、１６□・
・・Ｄ／Ａ変換器、１６３・・・速度制御器、１６４．
　１６４１．　１６４□・・・電流検出器、１６５．　
１６５．、　１６５□・・・α制御器、１６ｅ、　　１
６ａｉ、・・・β制御器、ｓ、、　ｓ２・・・スイッチ
。Fig. 1 is a block diagram of a conventional AC motor control device, Fig. 2 is a waveform diagram of each part of Fig. 1, Fig. 3 is a main circuit configuration diagram of an AC motor control device to which the present invention is applied, and Fig. 4 5 is a waveform diagram of each part of FIG. 3 in conventional control, and FIG. 6 is a block diagram showing an embodiment of the present invention. 11, 11. , 11°...AC power input terminal,
12.12□, 12□... rectifier, 13,13. . 13°...DC reactor, 14,14. ．． 14□・
...Inverter, 15,15°...Synchronous motor, 15
1...Position detector, 161...Speed reference, 16□・
...D/A converter, 163...Speed controller, 164.
1641. 164□...Current detector, 165.
165. , 165□...α controller, 16e, 1
6ai,...β controller, s,, s2...switch.

Claims

[Scope of utility model registration request]

A series circuit consisting of a rectifier that converts AC power into DC power, and an inverter that converts this DC power back to AC power at a different frequency. the series circuit connected to each polyphase winding of the synchronous motor;
In order to control the output of the synchronous motor by controlling the DC power output from the rectifier, an α controller for the rectifier, a speed controller for the synchronous motor, and a β controller for the inverter are provided. In the control device for an AC motor, which intermittently controls the DC current of the series circuit in the speed region to commutate the corresponding sirisk of the inverter, during the intermittent control, the decrease or increase in the DC current of one of the series circuits is controlled by the circuit. The α controller is controlled by a detection signal of the sum of the DC currents of the plurality of series circuits to increase or decrease the other DC current depending on the characteristics, and the DC currents of the plurality of series circuits are alternately energized. 1. A control device for an AC motor, characterized in that the sum of the DC currents is kept approximately constant even when the DC currents are applied.