JPS54140115A - Variable speed operation method of alternating current motor - Google Patents
Variable speed operation method of alternating current motorInfo
- Publication number
- JPS54140115A JPS54140115A JP4724278A JP4724278A JPS54140115A JP S54140115 A JPS54140115 A JP S54140115A JP 4724278 A JP4724278 A JP 4724278A JP 4724278 A JP4724278 A JP 4724278A JP S54140115 A JPS54140115 A JP S54140115A
- Authority
- JP
- Japan
- Prior art keywords
- speed level
- converter device
- frequency converter
- maximum speed
- motor
- 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
Links
Landscapes
- Motor And Converter Starters (AREA)
Abstract
PURPOSE: To reduce duty of static frequency converter device, by supplying power selectively by direct supply from electric source system and by indirect supply via static frequency converter device.
CONSTITUTION: Indirect power which is via static converter device 4 is supplied to start, acceleration and deceleration of the motor 1, and continuous operation in intermediate speed level, and direct power from electric source system is supplied in the maximum speed level continuous operation. When speed level of the motor 1 is shifted from intermediate speed level to the maximum speed level, opening degree of damper 8 is forcedly throttled and load limitation is done, and then, the motor 1 is accelerated to the maximum speed level by the static frequency converter device 4. When speed is reached to the maximum speed level, power supply is switched from indirect power supply via static frequency converter device 4 to direct power supply from electric source, and throttle instruction of opening degree of the damper 8 is released.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4724278A JPS54140115A (en) | 1978-04-21 | 1978-04-21 | Variable speed operation method of alternating current motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4724278A JPS54140115A (en) | 1978-04-21 | 1978-04-21 | Variable speed operation method of alternating current motor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54140115A true JPS54140115A (en) | 1979-10-31 |
Family
ID=12769748
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4724278A Pending JPS54140115A (en) | 1978-04-21 | 1978-04-21 | Variable speed operation method of alternating current motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54140115A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5925997U (en) * | 1982-08-10 | 1984-02-17 | 帝人株式会社 | Yarn processing machine drive device |
US4708594A (en) * | 1984-12-21 | 1987-11-24 | Hitachi, Ltd. | Method of starting a variable-speed pump turbine or a variable speed pump |
US4784580A (en) * | 1983-07-30 | 1988-11-15 | Mitsubishi Denki Kabushiki Kaisha | Airflow control system |
-
1978
- 1978-04-21 JP JP4724278A patent/JPS54140115A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5925997U (en) * | 1982-08-10 | 1984-02-17 | 帝人株式会社 | Yarn processing machine drive device |
US4784580A (en) * | 1983-07-30 | 1988-11-15 | Mitsubishi Denki Kabushiki Kaisha | Airflow control system |
US4708594A (en) * | 1984-12-21 | 1987-11-24 | Hitachi, Ltd. | Method of starting a variable-speed pump turbine or a variable speed pump |
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