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JPS57180393A - Controller for induction motor - Google Patents

Controller for induction motor

Info

Publication number
JPS57180393A
JPS57180393A JP56065941A JP6594181A JPS57180393A JP S57180393 A JPS57180393 A JP S57180393A JP 56065941 A JP56065941 A JP 56065941A JP 6594181 A JP6594181 A JP 6594181A JP S57180393 A JPS57180393 A JP S57180393A
Authority
JP
Japan
Prior art keywords
motor
phase
maximize
power factor
induction motor
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
JP56065941A
Other languages
Japanese (ja)
Inventor
Takayuki Sudo
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 JP56065941A priority Critical patent/JPS57180393A/en
Publication of JPS57180393A publication Critical patent/JPS57180393A/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
    • H02P23/26—Power factor control [PFC]

Landscapes

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

Abstract

PURPOSE:To improve the operating efficiency of an induction motor by altering a set firing angle value which is applied to a firing control circuit in response to the displacement from the phase of a load current which flows through the motor from a reference current phase necessary to maximize the power factor of the motor. CONSTITUTION:AC voltages from AC power source lines 1A, 1B are supplied to an induction motor 3 through a bidirectional thyristor 2. A load current which flows to the motor 3 is inputted through a transformer 14, a diode bridge 15 and a detecting resistor 16 to a Schmitt circuit 17, and its phase is compared with the phase of a reference current necessary to maximize the power factor of the motor via a reversible counter 11 and a comparator 9. The firing angle of the bidirectional thyristor 2 is controlled based on the compared result so as to always maximize the power factor of the motor.
JP56065941A 1981-04-30 1981-04-30 Controller for induction motor Pending JPS57180393A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56065941A JPS57180393A (en) 1981-04-30 1981-04-30 Controller for induction motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56065941A JPS57180393A (en) 1981-04-30 1981-04-30 Controller for induction motor

Publications (1)

Publication Number Publication Date
JPS57180393A true JPS57180393A (en) 1982-11-06

Family

ID=13301488

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56065941A Pending JPS57180393A (en) 1981-04-30 1981-04-30 Controller for induction motor

Country Status (1)

Country Link
JP (1) JPS57180393A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996005651A1 (en) * 1994-08-08 1996-02-22 Williamson David L Digital power optimization system for ac induction motors

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996005651A1 (en) * 1994-08-08 1996-02-22 Williamson David L Digital power optimization system for ac induction motors

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