JPS55103095A - Protector for scherbius apparatus - Google Patents

Protector for scherbius apparatus

Info

Publication number
JPS55103095A
JPS55103095A JP871979A JP871979A JPS55103095A JP S55103095 A JPS55103095 A JP S55103095A JP 871979 A JP871979 A JP 871979A JP 871979 A JP871979 A JP 871979A JP S55103095 A JPS55103095 A JP S55103095A
Authority
JP
Japan
Prior art keywords
power
capacitor
voltage
electric valve
abnormal voltage
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
JP871979A
Other languages
Japanese (ja)
Inventor
Chihiro Okatsuchi
Hiroki Hasegawa
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP871979A priority Critical patent/JPS55103095A/en
Publication of JPS55103095A publication Critical patent/JPS55103095A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Ac Motors In General (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Protection Of Generators And Motors (AREA)

Abstract

PURPOSE: To perform protection against an abnormal voltage, by discharging a capacitor through a current limiting resistor and an electric valve when a power voltage falls abnormally or disappears and by absorbing the abnormal voltage which appears when power is restored.
CONSTITUTION: In normal operation, a capacitor 24 is charged to the level of the output voltage of a power rectifier and an electric valve 27 is open. When power failure is detected by a voltage detecting circuit 17, a driving circuit 18 is energized and the electric valve 27 is closed to connect a current limiting resistor 26 to both the terminals of the capacitor 24 to quickly discharge it. The secondary abnormal voltage of an induction motor, which appears when power is restored, is short- circuited on the output side of the power rectifier 3 by a diode 23, the capacitor 24 and a resistor 25 so that the level of the abnormal voltage is suppressed.
COPYRIGHT: (C)1980,JPO&Japio
JP871979A 1979-01-30 1979-01-30 Protector for scherbius apparatus Pending JPS55103095A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP871979A JPS55103095A (en) 1979-01-30 1979-01-30 Protector for scherbius apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP871979A JPS55103095A (en) 1979-01-30 1979-01-30 Protector for scherbius apparatus

Publications (1)

Publication Number Publication Date
JPS55103095A true JPS55103095A (en) 1980-08-06

Family

ID=11700744

Family Applications (1)

Application Number Title Priority Date Filing Date
JP871979A Pending JPS55103095A (en) 1979-01-30 1979-01-30 Protector for scherbius apparatus

Country Status (1)

Country Link
JP (1) JPS55103095A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59220094A (en) * 1983-05-27 1984-12-11 Hitachi Ltd Stationary secondary exciting controller
JPS6374090U (en) * 1986-10-29 1988-05-17
KR960039576A (en) * 1995-04-28 1996-11-25 이나바 세이우에몬 Regenerative resistance protection method and protection device of inverter for servo motor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59220094A (en) * 1983-05-27 1984-12-11 Hitachi Ltd Stationary secondary exciting controller
JPH0586155B2 (en) * 1983-05-27 1993-12-10 Hitachi Ltd
JPS6374090U (en) * 1986-10-29 1988-05-17
KR960039576A (en) * 1995-04-28 1996-11-25 이나바 세이우에몬 Regenerative resistance protection method and protection device of inverter for servo motor

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