JPS54140115A - Variable speed operation method of alternating current motor - Google Patents

Variable speed operation method of alternating current motor

Info

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
Application number
JP4724278A
Other languages
Japanese (ja)
Inventor
Takeo Yoshimura
Shigeru Tomono
Shigeo Nakao
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
Nippon Steel Corp
Original Assignee
Fuji Electric Co Ltd
Nippon Steel 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 Fuji Electric Co Ltd, Nippon Steel Corp filed Critical Fuji Electric Co Ltd
Priority to JP4724278A priority Critical patent/JPS54140115A/en
Publication of JPS54140115A publication Critical patent/JPS54140115A/en
Pending legal-status Critical Current

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  • 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
JP4724278A 1978-04-21 1978-04-21 Variable speed operation method of alternating current motor Pending JPS54140115A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (3)

* Cited by examiner, † Cited by third party
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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