JPS56141701A - Protective method for main circuit of dc electric vehicle - Google Patents
Protective method for main circuit of dc electric vehicleInfo
- Publication number
- JPS56141701A JPS56141701A JP4347980A JP4347980A JPS56141701A JP S56141701 A JPS56141701 A JP S56141701A JP 4347980 A JP4347980 A JP 4347980A JP 4347980 A JP4347980 A JP 4347980A JP S56141701 A JPS56141701 A JP S56141701A
- Authority
- JP
- Japan
- Prior art keywords
- series
- group
- circuit
- motor
- circuits
- 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
Landscapes
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
PURPOSE: To effectively protect a motor when sparking short-circuit is occured on a DC motor armature by a method wherein the main circuit is broken in response to the attainment to the preset value of the difference in current on the two series circuits which are cross-field connected.
CONSTITUTION: The armatures A1WA3 of the main motor in the first group and the series field magnets MF4WMF6 of the main motor in the second group are connected in series, the armatures A4WA6 of the second group and the series field magnets MF1WMF3 are connected in series and a dynamic braking resistor R is connected in parallel commonly to both of these series circuits. Also, when the difference in current of the currents i2 and i3 running to the two DC circuits has reached the preset value, a differential current relay DR, with which line breakers L1 and L2 will be open-circulated, is provided. Through these procedures, the motors can be protected effectively in the case when a sparking short-circuit is occured on the armature.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4347980A JPS56141701A (en) | 1980-04-04 | 1980-04-04 | Protective method for main circuit of dc electric vehicle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4347980A JPS56141701A (en) | 1980-04-04 | 1980-04-04 | Protective method for main circuit of dc electric vehicle |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56141701A true JPS56141701A (en) | 1981-11-05 |
Family
ID=12664851
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4347980A Pending JPS56141701A (en) | 1980-04-04 | 1980-04-04 | Protective method for main circuit of dc electric vehicle |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56141701A (en) |
-
1980
- 1980-04-04 JP JP4347980A patent/JPS56141701A/en active Pending
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