| 摘要 |
PURPOSE:To detect a trouble in a motor even not in its operation, by driving an oil hydraulic pump with the motor, feeding a supervisory current less than its driving voltage from a supervisory current feeding means and interposing the supervisory current feeding means to said driving circuit. CONSTITUTION:A motor 13 is driven by a driving signal e0 from an anti-skid control circuit 1 through a transistor Tr1 and relay RL. When a brake is not applied, the relay RL is opened, and a supervisory current less than the driving current is fed to the motor 13 through a resistor R0. A comparator 15 compares this voltage with reference voltage Vr, when the motor 13 is caused a trouble with the above voltage higher than the voltage Vr, output H is generated in an exclusive OR16. Here is no MR signal, and output of an exclusive OR18 becomes H to turn on a display lamp 19. |
