JPS5619303A - Protective device for chopper of electric rolling stock - Google Patents
Protective device for chopper of electric rolling stockInfo
- Publication number
- JPS5619303A JPS5619303A JP8232079A JP8232079A JPS5619303A JP S5619303 A JPS5619303 A JP S5619303A JP 8232079 A JP8232079 A JP 8232079A JP 8232079 A JP8232079 A JP 8232079A JP S5619303 A JPS5619303 A JP S5619303A
- Authority
- JP
- Japan
- Prior art keywords
- chopper
- voltage
- output
- filter capacitor
- rolling stock
- 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)
Abstract
PURPOSE: To prevent a failure of the commutation of a chopper generated due to the low electromotive force of a motor in a low speed range previously by a method wherein output from a voltage detector of a filter capacitor and a detector of motor currents is utilized.
CONSTITUTION: Ouput from a pattern circuit 22 and the voltage of a filter capacitor 5, output from a voltage detector 6, are compared by means of a comparison circuit 23. When the speed of an electric rolling stock drops and the voltage of the filter capacitor 5 becomes to a specified value or less, the comparator 22 functions, and sends out ON output. Thus, a solenoid valve 26 is turned OFF while the gate pulses of a chopper 10 are stopped, and a failure of commutation is prevented.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8232079A JPS5619303A (en) | 1979-06-26 | 1979-06-26 | Protective device for chopper of electric rolling stock |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8232079A JPS5619303A (en) | 1979-06-26 | 1979-06-26 | Protective device for chopper of electric rolling stock |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5619303A true JPS5619303A (en) | 1981-02-24 |
JPS6129202B2 JPS6129202B2 (en) | 1986-07-05 |
Family
ID=13771266
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8232079A Granted JPS5619303A (en) | 1979-06-26 | 1979-06-26 | Protective device for chopper of electric rolling stock |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5619303A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61122148A (en) * | 1984-11-19 | 1986-06-10 | 大阪セメント株式会社 | Gypsum composition |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6321420A (en) * | 1986-07-15 | 1988-01-29 | Toshiba Corp | Cooker |
-
1979
- 1979-06-26 JP JP8232079A patent/JPS5619303A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61122148A (en) * | 1984-11-19 | 1986-06-10 | 大阪セメント株式会社 | Gypsum composition |
JPH0215509B2 (en) * | 1984-11-19 | 1990-04-12 | Osaka Cement |
Also Published As
Publication number | Publication date |
---|---|
JPS6129202B2 (en) | 1986-07-05 |
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