JPS5797383A - Speed controlling device for induction motor - Google Patents

Speed controlling device for induction motor

Info

Publication number
JPS5797383A
JPS5797383A JP55172957A JP17295780A JPS5797383A JP S5797383 A JPS5797383 A JP S5797383A JP 55172957 A JP55172957 A JP 55172957A JP 17295780 A JP17295780 A JP 17295780A JP S5797383 A JPS5797383 A JP S5797383A
Authority
JP
Japan
Prior art keywords
counter
pulses
counting
speed
pulse generator
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.)
Granted
Application number
JP55172957A
Other languages
Japanese (ja)
Other versions
JPS5949798B2 (en
Inventor
Hirotaka Miura
Yuzo Yoshida
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.)
Yaskawa Electric Corp
Original Assignee
Yaskawa Electric Manufacturing Co 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 Yaskawa Electric Manufacturing Co Ltd filed Critical Yaskawa Electric Manufacturing Co Ltd
Priority to JP55172957A priority Critical patent/JPS5949798B2/en
Publication of JPS5797383A publication Critical patent/JPS5797383A/en
Publication of JPS5949798B2 publication Critical patent/JPS5949798B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/045—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

PURPOSE:To control the speed of an induction motor by counting earlier or later pulses having a pulse width responsive to a sinusoidal wave and a duty in accordance with a speed deviation, thereby obtaining a gate signal of an inverter. CONSTITUTION:Since rotating pulses are normally late, a counter 22 for counting rotating pulses from a pulse generator 21 does not, when a counter 3 for counting pulses from a command pulse generator 1 overflows, complete counting yet. When the output of an FF23 becomes ON due to the overflow 3a of the counter 3 and the ON in the most significant digit of the counter 22, an AND gate 24 opens, thereby allowing the output pulse from a high speed pulse generator 7 to pass through OR gates 25, 25a and the counters 22 and 3 to count the pulses in addition. Since it does not perform data preset of a fixed memory 4 to a substraction counter 5 as a width controlling counter, only the address of the memory 4 instantaneously advances, thereby shortening the apparent period of the AC wave and fastening the power frequency, and the rotating speed of the motor can be accelerated.
JP55172957A 1980-12-08 1980-12-08 Induction motor speed control device Expired JPS5949798B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55172957A JPS5949798B2 (en) 1980-12-08 1980-12-08 Induction motor speed control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55172957A JPS5949798B2 (en) 1980-12-08 1980-12-08 Induction motor speed control device

Publications (2)

Publication Number Publication Date
JPS5797383A true JPS5797383A (en) 1982-06-17
JPS5949798B2 JPS5949798B2 (en) 1984-12-05

Family

ID=15951491

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55172957A Expired JPS5949798B2 (en) 1980-12-08 1980-12-08 Induction motor speed control device

Country Status (1)

Country Link
JP (1) JPS5949798B2 (en)

Also Published As

Publication number Publication date
JPS5949798B2 (en) 1984-12-05

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