发明名称 |
Resistor grid protector |
摘要 |
Apparatus for preventing damage to resistor grids in the propulsion controller circuit of a direct current motor, particularly of the type used in driving railway vehicles, in which a line breaker relay is de-energized whenever the propulsion controller fails to progress from the switch position to the full series position within 15-25 seconds. The line breaker relay remains de-energized for the duration of the power cycle of the propulsion controller and becomes operational automatically after the master control handle is returned to the off position.
|
申请公布号 |
US4169242(A) |
申请公布日期 |
1979.09.25 |
申请号 |
US19770849796 |
申请日期 |
1977.11.09 |
申请人 |
MARINE ELECTRIC CORPORATION |
发明人 |
PARKE, HARRY G.;TOMSKY, HARRY W. |
分类号 |
H02P1/02;(IPC1-7):H02P1/04 |
主分类号 |
H02P1/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|