JPS5752396A - Speed control device of induction motor - Google Patents

Speed control device of induction motor

Info

Publication number
JPS5752396A
JPS5752396A JP55128231A JP12823180A JPS5752396A JP S5752396 A JPS5752396 A JP S5752396A JP 55128231 A JP55128231 A JP 55128231A JP 12823180 A JP12823180 A JP 12823180A JP S5752396 A JPS5752396 A JP S5752396A
Authority
JP
Japan
Prior art keywords
signal
motor
point
maximum efficiency
load
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
JP55128231A
Other languages
Japanese (ja)
Inventor
Kazuo Nagatake
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP55128231A priority Critical patent/JPS5752396A/en
Publication of JPS5752396A publication Critical patent/JPS5752396A/en
Pending 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
    • H02P27/06—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 using dc to ac converters or inverters

Landscapes

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

Abstract

PURPOSE:To make to operate always in the maximum efficiency even when operating the load, wherein a load torque changes, by controlling an inverter so as to make the point of intersection of a load torque curve and a motor torque curve to accord with the point of the maximum efficiency of a motor. CONSTITUTION:An AC motor is driven by an inverter 1 connecting the transistors Tr1-6 into a three-phase bridge form. At this time a speed setting signal S1 are made into a pulse train signal S2 proportional to the output frequency through a frequency converter 7 to simultaneously correct so that a motor torque may balance a load torque at the point of the maximum efficiency by feeding said signal to a speed corrector 8. And said signal is synthesized with the signal S2 through a signal generator 9 composed of a memory part 10 and an address selection part 11 to be given to a base control circuit 12 for controlling an inverter 1. Accordingly even a fan load and such, which change the load torque depending on the revolution speed, can always operate the motor at the point of maximum efficiency.
JP55128231A 1980-09-16 1980-09-16 Speed control device of induction motor Pending JPS5752396A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55128231A JPS5752396A (en) 1980-09-16 1980-09-16 Speed control device of induction motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55128231A JPS5752396A (en) 1980-09-16 1980-09-16 Speed control device of induction motor

Publications (1)

Publication Number Publication Date
JPS5752396A true JPS5752396A (en) 1982-03-27

Family

ID=14979729

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55128231A Pending JPS5752396A (en) 1980-09-16 1980-09-16 Speed control device of induction motor

Country Status (1)

Country Link
JP (1) JPS5752396A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS609395A (en) * 1983-06-25 1985-01-18 Yaskawa Electric Mfg Co Ltd Operating method of induction motor
JPS6022496A (en) * 1983-07-15 1985-02-04 Mayekawa Mfg Co Ltd High efficiency operating speed control system for ac motor
JPS61176238U (en) * 1985-04-22 1986-11-04
EP0652374A1 (en) * 1993-10-21 1995-05-10 Ebara Corporation System for controlling operation of turbo type fluid machinery
JP2013209928A (en) * 2012-03-30 2013-10-10 Ebara Corp Vacuum evacuation device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS609395A (en) * 1983-06-25 1985-01-18 Yaskawa Electric Mfg Co Ltd Operating method of induction motor
JPH0341029B2 (en) * 1983-06-25 1991-06-20
JPS6022496A (en) * 1983-07-15 1985-02-04 Mayekawa Mfg Co Ltd High efficiency operating speed control system for ac motor
JPS61176238U (en) * 1985-04-22 1986-11-04
EP0652374A1 (en) * 1993-10-21 1995-05-10 Ebara Corporation System for controlling operation of turbo type fluid machinery
US5634772A (en) * 1993-10-21 1997-06-03 Ebara Corporation System for controlling operation of turbo type fluid machinery
JP2013209928A (en) * 2012-03-30 2013-10-10 Ebara Corp Vacuum evacuation device

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