JPS57142194A - Electric power-saving control circuit for motor - Google Patents

Electric power-saving control circuit for motor

Info

Publication number
JPS57142194A
JPS57142194A JP56026179A JP2617981A JPS57142194A JP S57142194 A JPS57142194 A JP S57142194A JP 56026179 A JP56026179 A JP 56026179A JP 2617981 A JP2617981 A JP 2617981A JP S57142194 A JPS57142194 A JP S57142194A
Authority
JP
Japan
Prior art keywords
motor
gate pulse
phase
voltage
circuit
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
JP56026179A
Other languages
Japanese (ja)
Inventor
Masayuki Kanari
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP56026179A priority Critical patent/JPS57142194A/en
Publication of JPS57142194A publication Critical patent/JPS57142194A/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 prevent the erroneous firing of a phase controlling element due to the variation in the phase of a motor current by varying th width of a gate pulse signal applied to the phase controlling element for controlling the applied voltage of the motor in response to the phase of a load current for the power voltage. CONSTITUTION:An induction motor 2 is connected to a power source 1 through a phase controlling element 3 relative to the circuit for controlling the applied voltage to the motor. A current detector 4 detects the load current flowing through the motor 2, and the output is inputted to a comparator 5 together with a reference voltage 6 relative to the reference voltage circuit. A gate pulse circuit 8 supplies a gate pulse to the phase control element 3. The gate pulse is controlled for the gate pulse generating time by the output voltage of the comparator 5, and is controlld for the gate pulse width by a gate pulse width controller 7.
JP56026179A 1981-02-26 1981-02-26 Electric power-saving control circuit for motor Pending JPS57142194A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56026179A JPS57142194A (en) 1981-02-26 1981-02-26 Electric power-saving control circuit for motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56026179A JPS57142194A (en) 1981-02-26 1981-02-26 Electric power-saving control circuit for motor

Publications (1)

Publication Number Publication Date
JPS57142194A true JPS57142194A (en) 1982-09-02

Family

ID=12186295

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56026179A Pending JPS57142194A (en) 1981-02-26 1981-02-26 Electric power-saving control circuit for motor

Country Status (1)

Country Link
JP (1) JPS57142194A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61172309U (en) * 1985-04-11 1986-10-25
US8967983B2 (en) 2009-10-13 2015-03-03 Novenco A/S System for the construction of an axial fan

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61172309U (en) * 1985-04-11 1986-10-25
US8967983B2 (en) 2009-10-13 2015-03-03 Novenco A/S System for the construction of an axial fan

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