JPS56129595A - Operation controlling device for motor - Google Patents
Operation controlling device for motorInfo
- 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
Links
Landscapes
- Control Of Ac Motors In General (AREA)
- Stopping Of Electric Motors (AREA)
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.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3231480A JPS56129595A (en) | 1980-03-14 | 1980-03-14 | Operation controlling device for motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3231480A JPS56129595A (en) | 1980-03-14 | 1980-03-14 | Operation controlling device for motor |
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 |
---|---|---|---|
JP3231480A Granted JPS56129595A (en) | 1980-03-14 | 1980-03-14 | Operation controlling device for motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56129595A (en) |
Cited By (7)
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 | 三菱電機株式会社 | Inverter overcurrent stall protection device |
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)
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 |
-
1980
- 1980-03-14 JP JP3231480A patent/JPS56129595A/en active Granted
Patent Citations (2)
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)
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 | 三菱電機株式会社 | Inverter overcurrent stall protection device |
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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