JPS59119798U

JPS59119798U - Motor rotation speed control circuit

Info

Publication number: JPS59119798U
Application number: JP1983010653U
Authority: JP
Inventors: 均田中; 安治大石
Original assignee: 株式会社山武
Priority date: 1983-01-28
Filing date: 1983-01-28
Publication date: 1984-08-13

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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例によるモータ回転数制御回
路の回路図、第２図は第１図の各部＆とおける信号波形
図、第３図は制動時の信号波形図である。１・・・鋸歯状波発生回路、２・・・ワンショットマル
チバイブレータ、３・・・第１のフィルタ回路、４・・
・第２のフィルタ回路、Ｕｌ、Ｕ２・・・オペアンプ、
Ｕ３．Ｕ４・・・コンパレータ、ＰＣ・・・フォトカプ
ラ、ＴＲＣ・・・三端子双方向サイリスタ、Ｉｎ１．Ｉ
ｎ２・・・インバータ。FIG. 1 is a circuit diagram of a motor rotation speed control circuit according to an embodiment of this invention, FIG. 2 is a signal waveform diagram at each part & in FIG. 1, and FIG. 3 is a signal waveform diagram during braking. DESCRIPTION OF SYMBOLS 1... Sawtooth wave generation circuit, 2... One-shot multivibrator, 3... First filter circuit, 4...
・Second filter circuit, Ul, U2... operational amplifier,
U3. U4... Comparator, PC... Photocoupler, TRC... Three-terminal bidirectional thyristor, In1. I
n2...Inverter.

Claims

[Scope of utility model registration request]

A circuit for controlling the rotational speed of the parlor by controlling the phase angle of a three-terminal bidirectional thyristor inserted between a motor and an AC power source to control the current supplied to the motor. , a one-shot multivibrator that receives a pulse input having a frequency proportional to the rotation speed of the motor and shapes it into a pulse signal having the same frequency as the input and a constant pulse width; a first filter circuit that is charged in a first state and discharged in a second state to output a voltage proportional to the frequency of the pulse input; and a sawtooth wave signal synchronized with the AC power supply voltage. a sawtooth wave generation circuit that generates a sawtooth wave generator; a first comparator that receives the output of the first filter circuit and a setting signal and compares these signals; and when the output of the comparator is in a first state. a second filter circuit that is charged to a second state and outputs a smoothed voltage by discharging when in a second state; and inputting the output voltage of the second filter circuit and the output of the sawtooth wave generation circuit. a second comparator for receiving and comparing them; means for triggering the gate of the three-terminal bidirectional sirisk with a signal indicating the comparison result of the second comparator; and a brake for applying when braking of the motor is required. Upon receiving the signal, the sawtooth wave generating circuit outputs a sawtooth wave signal having an output only during either the positive or negative period of the alternating current signal, and the sawtooth wave signal is passed through the second comparator. A motor rotation speed control circuit equipped with means for outputting the output as it is.