JPS54115724A - Current limiting method for motor - Google Patents
Current limiting method for motorInfo
- 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
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
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)
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 |
-
1978
- 1978-02-28 JP JP2322878A patent/JPS54115724A/en active Pending
Cited By (2)
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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