JPS5629484A - Load torque detector for induction motor - Google Patents

Load torque detector for induction motor

Info

Publication number
JPS5629484A
JPS5629484A JP10189379A JP10189379A JPS5629484A JP S5629484 A JPS5629484 A JP S5629484A JP 10189379 A JP10189379 A JP 10189379A JP 10189379 A JP10189379 A JP 10189379A JP S5629484 A JPS5629484 A JP S5629484A
Authority
JP
Japan
Prior art keywords
signal
load torque
induction motor
speed
actual speed
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
JP10189379A
Other languages
Japanese (ja)
Inventor
Shigeki Kawada
Hiroshi Ishida
Yutaka Koiwai
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.)
Fanuc Corp
Original Assignee
Fanuc Corp
Fujitsu Fanuc 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 Fanuc Corp, Fujitsu Fanuc Ltd filed Critical Fanuc Corp
Priority to JP10189379A priority Critical patent/JPS5629484A/en
Publication of JPS5629484A publication Critical patent/JPS5629484A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Ac Motors In General (AREA)

Abstract

PURPOSE:To detect the load torque stable over wide speed range by applying a signal obtained by proportionally integrating a deviation signal between a speed instruction signal and an actual speed signal to an ammeter. CONSTITUTION:When the load torque is increased in the induction motor, there occurs a difference between the actual speed signal from a tachometer generator 3 and the speed instruction signal, and a proportional integrating amplifier 5 integrates the signal and produces a signal becoming higher as the time goes. The output signal is added to a frequency signal responsive to the actual speed signal by an adder circuit 10 to obtain a control signal compensated for the slip frequency. When the output of the amplifier 5 is displayed on the ammeter 6, the magnitude of the load torque can be gained.
JP10189379A 1979-08-10 1979-08-10 Load torque detector for induction motor Pending JPS5629484A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10189379A JPS5629484A (en) 1979-08-10 1979-08-10 Load torque detector for induction motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10189379A JPS5629484A (en) 1979-08-10 1979-08-10 Load torque detector for induction motor

Publications (1)

Publication Number Publication Date
JPS5629484A true JPS5629484A (en) 1981-03-24

Family

ID=14312597

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10189379A Pending JPS5629484A (en) 1979-08-10 1979-08-10 Load torque detector for induction motor

Country Status (1)

Country Link
JP (1) JPS5629484A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6043304A (en) * 1983-08-19 1985-03-07 井関農機株式会社 Direction controller of moving agricultural machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6043304A (en) * 1983-08-19 1985-03-07 井関農機株式会社 Direction controller of moving agricultural machine

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