JPS54115724A - Current limiting method for motor - Google Patents

Current limiting method for motor

Info

Publication number
JPS54115724A
JPS54115724A JP2322878A JP2322878A JPS54115724A JP S54115724 A JPS54115724 A JP S54115724A JP 2322878 A JP2322878 A JP 2322878A JP 2322878 A JP2322878 A JP 2322878A JP S54115724 A JPS54115724 A JP S54115724A
Authority
JP
Japan
Prior art keywords
circuit
schumit
motor
thyristor
limiter
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
JP2322878A
Other languages
Japanese (ja)
Inventor
Tomoaki Sugimoto
Junichi Murakami
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 JP2322878A priority Critical patent/JPS54115724A/en
Publication of JPS54115724A publication Critical patent/JPS54115724A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To allow supplying of overcurrent to a motor within the short time overcurrent allowance determined by the transient heat time constant of a thyristor, by selecting the limit factor of a limiter circuit by means of a Schumit circuit.
CONSTITUTION: When supplying power from thyristor converter C to a motor M, Schumit circuit SM for comparing the actual current detected by the current transformer CT with the referential level and two delay function elements TD1, TD2 located at the post-stage of Schumit circuit are provided to change the setting of limit level of limiter circuit LMT. Consequently Schumit circuit SM turns on only during the interval when the actual current is exceeding over the target, thereby if the limiter LMT selects the limit factors α1, α2 respectively when the signal from the delay function element TD2 are on and off, over torque is produced by the motor against the short time overload and the thyristor is protected.
COPYRIGHT: (C)1979,JPO&Japio
JP2322878A 1978-02-28 1978-02-28 Current limiting method for motor Pending JPS54115724A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2322878A JPS54115724A (en) 1978-02-28 1978-02-28 Current limiting method for motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2322878A JPS54115724A (en) 1978-02-28 1978-02-28 Current limiting method for motor

Publications (1)

Publication Number Publication Date
JPS54115724A true JPS54115724A (en) 1979-09-08

Family

ID=12104760

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2322878A Pending JPS54115724A (en) 1978-02-28 1978-02-28 Current limiting method for motor

Country Status (1)

Country Link
JP (1) JPS54115724A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989006452A1 (en) * 1988-01-08 1989-07-13 Fanuc Ltd System for protection servo amplifier
CN104698421A (en) * 2014-05-27 2015-06-10 国家电网公司 Electronic current transformer transient transformation delay time measuring device and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989006452A1 (en) * 1988-01-08 1989-07-13 Fanuc Ltd System for protection servo amplifier
CN104698421A (en) * 2014-05-27 2015-06-10 国家电网公司 Electronic current transformer transient transformation delay time measuring device and method

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