JPS6419901A - Overvoltage protector for electric car inverter - Google Patents

Overvoltage protector for electric car inverter

Info

Publication number
JPS6419901A
JPS6419901A JP62172058A JP17205887A JPS6419901A JP S6419901 A JPS6419901 A JP S6419901A JP 62172058 A JP62172058 A JP 62172058A JP 17205887 A JP17205887 A JP 17205887A JP S6419901 A JPS6419901 A JP S6419901A
Authority
JP
Japan
Prior art keywords
inverter
output
thyristor
overvoltage
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.)
Granted
Application number
JP62172058A
Other languages
Japanese (ja)
Other versions
JPH0750961B2 (en
Inventor
Shigetoshi Okamatsu
Tsutomu Ozawa
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP62172058A priority Critical patent/JPH0750961B2/en
Publication of JPS6419901A publication Critical patent/JPS6419901A/en
Publication of JPH0750961B2 publication Critical patent/JPH0750961B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Electric Propulsion And Braking For Vehicles (AREA)
  • Stopping Of Electric Motors (AREA)
  • Inverter Devices (AREA)

Abstract

PURPOSE:To enable performing the extinction of arc of an overvoltage protecting thyristor surely by attenuating an electric current flowing through said overvoltage protecting thyristor to an arc-extinguishing current and less, when the input terminal voltage of an inverter exceeds a given voltage during a regenerative braking operation. CONSTITUTION:When the terminal voltage of an inverter 6 becomes an overvoltage and the output of an overvoltage detector 14 reaches a high level during a regenerative braking, a thyristor 8S is ignited to absorb the electrical energy to a resistance 8R. At the same time, the output value of a gradually reducing apparatus for output voltage 18 decreases from 1.0. Therefore, the output Vm of a V/f generator 12 is multiplied by a gradually decreasing value of less than 1.0 in a multiplier 19 and the value V'm also decreases gradually. As a result, the gate of the GTO thyristor 6G of said inverter 6 is throttled and the induced voltage of an induction motor 3 is forcibly lowered in the inverter 6.
JP62172058A 1987-07-11 1987-07-11 Overvoltage protection device for electric vehicle inverter Expired - Fee Related JPH0750961B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62172058A JPH0750961B2 (en) 1987-07-11 1987-07-11 Overvoltage protection device for electric vehicle inverter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62172058A JPH0750961B2 (en) 1987-07-11 1987-07-11 Overvoltage protection device for electric vehicle inverter

Publications (2)

Publication Number Publication Date
JPS6419901A true JPS6419901A (en) 1989-01-24
JPH0750961B2 JPH0750961B2 (en) 1995-05-31

Family

ID=15934753

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62172058A Expired - Fee Related JPH0750961B2 (en) 1987-07-11 1987-07-11 Overvoltage protection device for electric vehicle inverter

Country Status (1)

Country Link
JP (1) JPH0750961B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02262801A (en) * 1989-04-03 1990-10-25 Toyota Motor Corp Regenerative brake for electromobile
JPH0583804A (en) * 1991-09-13 1993-04-02 East Japan Railway Co Vehicle driver

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62135201A (en) * 1985-12-05 1987-06-18 Toshiba Corp Controller for electric railway car

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62135201A (en) * 1985-12-05 1987-06-18 Toshiba Corp Controller for electric railway car

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02262801A (en) * 1989-04-03 1990-10-25 Toyota Motor Corp Regenerative brake for electromobile
JPH0583804A (en) * 1991-09-13 1993-04-02 East Japan Railway Co Vehicle driver

Also Published As

Publication number Publication date
JPH0750961B2 (en) 1995-05-31

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees