JPS5992799A - Control system for induction motor - Google Patents

Control system for induction motor

Info

Publication number
JPS5992799A
JPS5992799A JP57201981A JP20198182A JPS5992799A JP S5992799 A JPS5992799 A JP S5992799A JP 57201981 A JP57201981 A JP 57201981A JP 20198182 A JP20198182 A JP 20198182A JP S5992799 A JPS5992799 A JP S5992799A
Authority
JP
Japan
Prior art keywords
load
current
maximum efficiency
induction motor
voltage
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
JP57201981A
Other languages
Japanese (ja)
Inventor
Nobunaga Suzuki
Koji Shimamoto
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 JP57201981A priority Critical patent/JPS5992799A/en
Publication of JPS5992799A publication Critical patent/JPS5992799A/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]

Abstract

PURPOSE:To enable to always hold the maximum efficiency irrespective of a load state by providing the prescribed relationship to a current which flows to an induction motor and controlling the terminal voltage. CONSTITUTION:When a load is varied a control circuit 4 searches a function table 10 by data which represents a new current I and supplies a new gate signal in response to it to a voltage control circuit 2. When the storage content of the function table 10 is suitably determined and the relationship between the voltage V and the current I is maintained to produce the maximum efficiency, the maximum efficiency in response to the load state can be always automatically obtained even if the load of the IM3 varies, with the result that the IM3 can be always operated with high efficiency irrespective of the variations in the load.
JP57201981A 1982-11-19 1982-11-19 Control system for induction motor Pending JPS5992799A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57201981A JPS5992799A (en) 1982-11-19 1982-11-19 Control system for induction motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57201981A JPS5992799A (en) 1982-11-19 1982-11-19 Control system for induction motor

Publications (1)

Publication Number Publication Date
JPS5992799A true JPS5992799A (en) 1984-05-29

Family

ID=16449954

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57201981A Pending JPS5992799A (en) 1982-11-19 1982-11-19 Control system for induction motor

Country Status (1)

Country Link
JP (1) JPS5992799A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994003969A1 (en) * 1992-08-04 1994-02-17 Rifala Pty. Ltd. Drive circuit for a resonant reciprocating motor
JP2007215352A (en) * 2006-02-10 2007-08-23 Nsk Ltd Load protector and load protection method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994003969A1 (en) * 1992-08-04 1994-02-17 Rifala Pty. Ltd. Drive circuit for a resonant reciprocating motor
JP2007215352A (en) * 2006-02-10 2007-08-23 Nsk Ltd Load protector and load protection method

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