JPS56162995A - Load compensating circuit for variable frequency inverter - Google Patents

Load compensating circuit for variable frequency inverter

Info

Publication number
JPS56162995A
JPS56162995A JP6462180A JP6462180A JPS56162995A JP S56162995 A JPS56162995 A JP S56162995A JP 6462180 A JP6462180 A JP 6462180A JP 6462180 A JP6462180 A JP 6462180A JP S56162995 A JPS56162995 A JP S56162995A
Authority
JP
Japan
Prior art keywords
amplifier
speed
variable frequency
output
torque
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
JP6462180A
Other languages
Japanese (ja)
Other versions
JPS6364160B2 (en
Inventor
Shigefumi Kurita
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.)
Fuji Electric Co Ltd
Original Assignee
Fuji 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 Fuji Electric Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP6462180A priority Critical patent/JPS56162995A/en
Publication of JPS56162995A publication Critical patent/JPS56162995A/en
Publication of JPS6364160B2 publication Critical patent/JPS6364160B2/ja
Granted 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)
  • Inverter Devices (AREA)
  • Control Of Electric Motors In General (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

PURPOSE:To improve the efficiency of a load compensating circuit for a variable frequency inverter by supplying a terminal voltage approximately responsive to a load on a motor. CONSTITUTION:The input DC current of an inverter is inputted through a DC current detector DC-CT to a proportional amplifier OP1. The output of the amplifier OP1 will vary approximately in proportion to the speed when a torque is constant. The output from the amplifier OP1 is inputted through an analog switch SW to a proportional amplifier OP2. The analog switch SW is conducted during a period inversely proportional to the speed. The output of the amplifier OP2 becomes a signal depending only upon a torque irrespective of the speed, is averaged by a filter F, and is added as a compensating input to the input side of a voltage regulator 4. A terminal voltage prepared by considering the torque is applied to the motor.
JP6462180A 1980-05-15 1980-05-15 Load compensating circuit for variable frequency inverter Granted JPS56162995A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6462180A JPS56162995A (en) 1980-05-15 1980-05-15 Load compensating circuit for variable frequency inverter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6462180A JPS56162995A (en) 1980-05-15 1980-05-15 Load compensating circuit for variable frequency inverter

Publications (2)

Publication Number Publication Date
JPS56162995A true JPS56162995A (en) 1981-12-15
JPS6364160B2 JPS6364160B2 (en) 1988-12-09

Family

ID=13263507

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6462180A Granted JPS56162995A (en) 1980-05-15 1980-05-15 Load compensating circuit for variable frequency inverter

Country Status (1)

Country Link
JP (1) JPS56162995A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59165990A (en) * 1983-03-04 1984-09-19 レンツェ・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング・ウント・コンパニー・コマンディートゲィートゲゼルシャフト・エルツェン Method and circuit device for regulating ac motor
JPS6070977A (en) * 1983-09-26 1985-04-22 Mitsubishi Electric Corp Control circuit of inverter
JPS61266076A (en) * 1985-05-20 1986-11-25 アレン−ブラツドリイ　カンパニ− Current adjustor
JPH0323192A (en) * 1989-06-20 1991-01-31 Hitachi Kiden Kogyo Ltd Control method of crane
JP2013147333A (en) * 2012-01-20 2013-08-01 Hitachi Industrial Equipment Systems Co Ltd Electric hoisting machine and control method therefor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0471058U (en) * 1990-08-10 1992-06-23

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59165990A (en) * 1983-03-04 1984-09-19 レンツェ・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング・ウント・コンパニー・コマンディートゲィートゲゼルシャフト・エルツェン Method and circuit device for regulating ac motor
JPS6070977A (en) * 1983-09-26 1985-04-22 Mitsubishi Electric Corp Control circuit of inverter
JPS61266076A (en) * 1985-05-20 1986-11-25 アレン−ブラツドリイ　カンパニ− Current adjustor
JPH0323192A (en) * 1989-06-20 1991-01-31 Hitachi Kiden Kogyo Ltd Control method of crane
JP2013147333A (en) * 2012-01-20 2013-08-01 Hitachi Industrial Equipment Systems Co Ltd Electric hoisting machine and control method therefor

Also Published As

Publication number Publication date
JPS6364160B2 (en) 1988-12-09

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