JPS57151296A - Speed controller of induction motor - Google Patents

Speed controller of induction motor

Info

Publication number
JPS57151296A
JPS57151296A JP56036121A JP3612181A JPS57151296A JP S57151296 A JPS57151296 A JP S57151296A JP 56036121 A JP56036121 A JP 56036121A JP 3612181 A JP3612181 A JP 3612181A JP S57151296 A JPS57151296 A JP S57151296A
Authority
JP
Japan
Prior art keywords
counter
motor
induction motor
converter
thyristor
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
Application number
JP56036121A
Other languages
Japanese (ja)
Inventor
Susumu Kawaguchi
Yukiyoshi Okamoto
Yoshiaki Taniuchi
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 Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
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 Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP56036121A priority Critical patent/JPS57151296A/en
Publication of JPS57151296A publication Critical patent/JPS57151296A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To semipermanently provide the lifetime of an induction motor by controlling the motor with a thyristor controller, and controlling the thyristor with a circuit with includes a counter and a D/A converter. CONSTITUTION:When an induction motor which drives a scraper or the like for a needle making machine is controlled by a thyristor controller, a control circuit is formed of a pulse generator 1, counters 2, 4 and a D/A converter 6. The initial voltage value is outputted from the counter 4 by an operation start signal, then a signal is inputted to the ounter 4 from the counter 2 at every t seconds to counter down the counter 2 by the divided minimum voltage to finally reach 0V, and a thyristor controller is controlled through the converter 6. Accordingly, the motor speed is uniformalized in variation in the speed and is gradually lowered, and the lifetime of the motor can be increased without maintenance.
JP56036121A 1981-03-13 1981-03-13 Speed controller of induction motor Pending JPS57151296A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56036121A JPS57151296A (en) 1981-03-13 1981-03-13 Speed controller of induction motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56036121A JPS57151296A (en) 1981-03-13 1981-03-13 Speed controller of induction motor

Publications (1)

Publication Number Publication Date
JPS57151296A true JPS57151296A (en) 1982-09-18

Family

ID=12460942

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56036121A Pending JPS57151296A (en) 1981-03-13 1981-03-13 Speed controller of induction motor

Country Status (1)

Country Link
JP (1) JPS57151296A (en)

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