JPS57129196A - Control device for ac motor - Google Patents

Control device for ac motor

Info

Publication number
JPS57129196A
JPS57129196A JP56013820A JP1382081A JPS57129196A JP S57129196 A JPS57129196 A JP S57129196A JP 56013820 A JP56013820 A JP 56013820A JP 1382081 A JP1382081 A JP 1382081A JP S57129196 A JPS57129196 A JP S57129196A
Authority
JP
Japan
Prior art keywords
motor
power source
converter
frequency
switch
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
JP56013820A
Other languages
Japanese (ja)
Inventor
Koreyuki Takeya
Yasuhiko Umezawa
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
Fuji 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 Fuji Electric Co Ltd, Fuji Electric Manufacturing Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP56013820A priority Critical patent/JPS57129196A/en
Publication of JPS57129196A publication Critical patent/JPS57129196A/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
    • H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
    • H02P23/08—Controlling based on slip frequency, e.g. adding slip frequency and speed proportional frequency

Landscapes

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

Abstract

PURPOSE:To stabilize a load drive without reducing the capacity of a motor by switching a power source to the motor in response to the variation in the frequency. CONSTITUTION:A variable frequency power converter 14 is provided between a commercial power source and an AC motor 12, which are connected via a switch 16, and a bypass circuit 20 having a switch 18 is provided for the converter 14. The switches 14, 18 are switched by a switch controller 22 to connect the motor 12 to the commercial power source 10 in the rated frequency range of the motor, and to connect the motor 12 to the converter 14 in the range of the frequency lower than the prescribed value. Thus, the phase difference between the voltage of the motor and the voltage at the power source can be eliminated at the switching time.
JP56013820A 1981-02-03 1981-02-03 Control device for ac motor Pending JPS57129196A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56013820A JPS57129196A (en) 1981-02-03 1981-02-03 Control device for ac motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56013820A JPS57129196A (en) 1981-02-03 1981-02-03 Control device for ac motor

Publications (1)

Publication Number Publication Date
JPS57129196A true JPS57129196A (en) 1982-08-11

Family

ID=11843909

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56013820A Pending JPS57129196A (en) 1981-02-03 1981-02-03 Control device for ac motor

Country Status (1)

Country Link
JP (1) JPS57129196A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02290196A (en) * 1990-04-04 1990-11-30 Takasago Thermal Eng Co Ltd Electric facility utilizing inverter unit
JP2007049849A (en) * 2005-08-11 2007-02-22 Toshiba Corp Protector for variable-frequency power supply systems
US20090304524A1 (en) * 2005-10-07 2009-12-10 Edwards Limited Method of Operating a Pumping System

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02290196A (en) * 1990-04-04 1990-11-30 Takasago Thermal Eng Co Ltd Electric facility utilizing inverter unit
JP2007049849A (en) * 2005-08-11 2007-02-22 Toshiba Corp Protector for variable-frequency power supply systems
JP4672481B2 (en) * 2005-08-11 2011-04-20 株式会社東芝 Variable frequency power supply system protection device
US20090304524A1 (en) * 2005-10-07 2009-12-10 Edwards Limited Method of Operating a Pumping System
US9334864B2 (en) * 2005-10-07 2016-05-10 Edwards Limited Method of operating a pumping system

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