JPS5666189A - Overvoltage protector for electric motor variable speed operating inverters - Google Patents

Overvoltage protector for electric motor variable speed operating inverters

Info

Publication number
JPS5666189A
JPS5666189A JP14077179A JP14077179A JPS5666189A JP S5666189 A JPS5666189 A JP S5666189A JP 14077179 A JP14077179 A JP 14077179A JP 14077179 A JP14077179 A JP 14077179A JP S5666189 A JPS5666189 A JP S5666189A
Authority
JP
Japan
Prior art keywords
capacitor
signal
speed instruction
comparator
upper limit
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
JP14077179A
Other languages
Japanese (ja)
Other versions
JPS5920273B2 (en
Inventor
Shigefumi Kurita
Hiroo Tomita
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 JP54140771A priority Critical patent/JPS5920273B2/en
Publication of JPS5666189A publication Critical patent/JPS5666189A/en
Publication of JPS5920273B2 publication Critical patent/JPS5920273B2/en
Expired 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
    • H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
    • H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
    • H02P3/18—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing an ac motor

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Stopping Of Electric Motors (AREA)
  • Protection Of Static Devices (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

PURPOSE:To prevent the breakdown due to the overvoltage of a semiconductor device by temporarily interrupting inverter-frequency lowering operation for breaking when the voltage detection signal of the smoothing capacitor of an inverter has reached a fixed upper limit value. CONSTITUTION:The revolution braking of a motor 3 is performed by applying regenerative braking with a speed instruction pattern given to make a stator frequency omega1 lower than the rotor frequency omega2 by an acceleration and deceleration operator 12. The voltage detection signal of a capacitor 4 fro a voltage detector 21 and the capacitor voltages fixed upper limit value signal from a setting device 22 are compared by a comparator 23. When the capacitor voltage has exceeded a fixed upper limit value, the comparator 23 outputs signal and speed instruction value is held by the signal so that the lowering speed instruction value is interrupted. When the capacitor voltage returns to a normal range, the output signal of the comparator 23 disappears to cancell holding action so that the speed instruction value lowers to a given pattern.
JP54140771A 1979-10-31 1979-10-31 Overvoltage protection device for inverter for variable speed motor operation Expired JPS5920273B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54140771A JPS5920273B2 (en) 1979-10-31 1979-10-31 Overvoltage protection device for inverter for variable speed motor operation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54140771A JPS5920273B2 (en) 1979-10-31 1979-10-31 Overvoltage protection device for inverter for variable speed motor operation

Publications (2)

Publication Number Publication Date
JPS5666189A true JPS5666189A (en) 1981-06-04
JPS5920273B2 JPS5920273B2 (en) 1984-05-11

Family

ID=15276358

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54140771A Expired JPS5920273B2 (en) 1979-10-31 1979-10-31 Overvoltage protection device for inverter for variable speed motor operation

Country Status (1)

Country Link
JP (1) JPS5920273B2 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57208895A (en) * 1981-06-16 1982-12-22 Fanuc Ltd Controlling system of induction motor
JPS57208894A (en) * 1981-06-16 1982-12-22 Fanuc Ltd Controlling system for induction motor
FR2521922A1 (en) * 1982-02-25 1983-08-26 Urban Transportation Dev Regenerative braking system for linear induction electric motor - has induction motor, conductor voltage monitor, and regenerative capacity controller for motor
JPS58207876A (en) * 1982-05-28 1983-12-03 Hitachi Ltd Voltage type inverter device
JPS605791A (en) * 1983-06-24 1985-01-12 Toshiba Corp Controller of induction motor
JPS63140684A (en) * 1986-12-01 1988-06-13 Mitsubishi Electric Corp Invertor device
FR2881297A1 (en) * 2005-01-27 2006-07-28 Schneider Toshiba Inverter DC bus voltage controlling method for AC motor, involves forcing slope of internal ramp to zero value when bus voltage value is higher than limiting value, and increasing slope value when voltage value is lower than limiting value

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0428686U (en) * 1990-07-03 1992-03-06

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57208895A (en) * 1981-06-16 1982-12-22 Fanuc Ltd Controlling system of induction motor
JPS57208894A (en) * 1981-06-16 1982-12-22 Fanuc Ltd Controlling system for induction motor
JPH0132760B2 (en) * 1981-06-16 1989-07-10 Fanuc Ltd
JPH0348754B2 (en) * 1981-06-16 1991-07-25 Fanuc Ltd
FR2521922A1 (en) * 1982-02-25 1983-08-26 Urban Transportation Dev Regenerative braking system for linear induction electric motor - has induction motor, conductor voltage monitor, and regenerative capacity controller for motor
JPS58207876A (en) * 1982-05-28 1983-12-03 Hitachi Ltd Voltage type inverter device
JPS605791A (en) * 1983-06-24 1985-01-12 Toshiba Corp Controller of induction motor
JPS63140684A (en) * 1986-12-01 1988-06-13 Mitsubishi Electric Corp Invertor device
FR2881297A1 (en) * 2005-01-27 2006-07-28 Schneider Toshiba Inverter DC bus voltage controlling method for AC motor, involves forcing slope of internal ramp to zero value when bus voltage value is higher than limiting value, and increasing slope value when voltage value is lower than limiting value
EP1686683A1 (en) * 2005-01-27 2006-08-02 Schneider Toshiba Inverter Europe SAS Method and system for managing the voltage on the DC bus of a speed controller for an AC motor
US7271566B2 (en) 2005-01-27 2007-09-18 Schneider Toshiba Inverter Europe Sas Method and system for managing the voltage on the DC bus of a speed controller for an AC motor

Also Published As

Publication number Publication date
JPS5920273B2 (en) 1984-05-11

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