JPS6419901A - Overvoltage protector for electric car inverter - Google Patents
Overvoltage protector for electric car inverterInfo
- 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
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.
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62135201A (en) * | 1985-12-05 | 1987-06-18 | Toshiba Corp | Controller for electric railway car |
-
1987
- 1987-07-11 JP JP62172058A patent/JPH0750961B2/en not_active Expired - Fee Related
Patent Citations (1)
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)
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 |