JPS56129595A - Operation controlling device for motor - Google Patents

Operation controlling device for motor

Info

Publication number
JPS56129595A
JPS56129595A JP3231480A JP3231480A JPS56129595A JP S56129595 A JPS56129595 A JP S56129595A JP 3231480 A JP3231480 A JP 3231480A JP 3231480 A JP3231480 A JP 3231480A JP S56129595 A JPS56129595 A JP S56129595A
Authority
JP
Japan
Prior art keywords
motor
current
backward
operated
degree
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
JP3231480A
Other languages
Japanese (ja)
Other versions
JPS6350960B2 (en
Inventor
Yozo Sanaka
Original Assignee
Toshiba Corp
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 filed Critical Toshiba Corp
Priority to JP55032314A priority Critical patent/JPS6350960B2/ja
Publication of JPS56129595A publication Critical patent/JPS56129595A/en
Publication of JPS6350960B2 publication Critical patent/JPS6350960B2/ja
Expired legal-status Critical Current

Links

Abstract

PURPOSE:To completely prevent the breakage of a frequency converter due to the backward-flow current generated when the motor is operated at a reduced speed by a method wherein a current limiter, having a preset current controlling value, a gate controlling circuit and the like are provided. CONSTITUTION:When an induction motor 5 is operated at an accelerated speed, the degree of increase of the output signal D on an adjustable speed limiting circuit 7 is reduced by an overcurrent Q1 on condition that a preset current controlling value has been exceeded on the motor which will be detected by a current transformer. On the other hand, when the motor is operated at a reduced speed, the backward-flow current of the motor 5 in excess of the preset current controlling value generated by the decceleration, in other words, during the period while the output signal Q2 is maintained, the degree of decrease of the output signal D of the adjustable speed limiting circuit 7 of the overcurrent Q1 is controlled by open-circuiting a gate 21 in such manner that the degree of reduction is maintained in the state which is based on the expected set point. Through these procedures, the decrease of the positive feedback of the output frequency and the output voltage on the frequency converter, generated by the backward-flow current of the motor caused by a powerful inertia of the motor load at the time of decceleration, can be prevented.
JP55032314A 1980-03-14 1980-03-14 Expired JPS6350960B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55032314A JPS6350960B2 (en) 1980-03-14 1980-03-14

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55032314A JPS6350960B2 (en) 1980-03-14 1980-03-14

Publications (2)

Publication Number Publication Date
JPS56129595A true JPS56129595A (en) 1981-10-09
JPS6350960B2 JPS6350960B2 (en) 1988-10-12

Family

ID=12355469

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55032314A Expired JPS6350960B2 (en) 1980-03-14 1980-03-14

Country Status (1)

Country Link
JP (1) JPS6350960B2 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58207876A (en) * 1982-05-28 1983-12-03 Hitachi Ltd Voltage type inverter device
JPS5917897A (en) * 1982-07-16 1984-01-30 Matsushita Electric Ind Co Ltd Control device for operation of compressor
JPS605791A (en) * 1983-06-24 1985-01-12 Toshiba Corp Controller of induction motor
JPS6077299U (en) * 1983-11-01 1985-05-30
JPS61161974A (en) * 1984-12-29 1986-07-22 Nissan Motor Co Ltd Regenerative controller of ac motor
JPS63140686A (en) * 1986-12-01 1988-06-13 Fuji Electric Co Ltd Control system for vector control ac motor
JPH01237373A (en) * 1988-03-16 1989-09-21 Matsushita Electric Ind Co Ltd Frequency control device of air conditioner

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50104328A (en) * 1974-01-23 1975-08-18
JPS5250519A (en) * 1975-10-21 1977-04-22 Toshiba Corp Frequency convertor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50104328A (en) * 1974-01-23 1975-08-18
JPS5250519A (en) * 1975-10-21 1977-04-22 Toshiba Corp Frequency convertor

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58207876A (en) * 1982-05-28 1983-12-03 Hitachi Ltd Voltage type inverter device
JPS5917897A (en) * 1982-07-16 1984-01-30 Matsushita Electric Ind Co Ltd Control device for operation of compressor
JPS605791A (en) * 1983-06-24 1985-01-12 Toshiba Corp Controller of induction motor
JPS6077299U (en) * 1983-11-01 1985-05-30
JPH0329996Y2 (en) * 1983-11-01 1991-06-25
JPS61161974A (en) * 1984-12-29 1986-07-22 Nissan Motor Co Ltd Regenerative controller of ac motor
JPS63140686A (en) * 1986-12-01 1988-06-13 Fuji Electric Co Ltd Control system for vector control ac motor
JPH01237373A (en) * 1988-03-16 1989-09-21 Matsushita Electric Ind Co Ltd Frequency control device of air conditioner

Also Published As

Publication number Publication date
JPS6350960B2 (en) 1988-10-12

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