| 摘要 |
PROBLEM TO BE SOLVED: To simultaneously prevent damage to a battery and damage to an electronic equipment, by cutting off supply of overcurrent by operating a breaker, after driving and regenerative output from a motor control circuit are stopped, when a detecting signal of an overcurrent flowing between the battery and the motor control circuit is received. SOLUTION: A current sensor 12 is arranged between a battery 4 of a power supply line L2 and a breaker 8. The current value at the above point is measured with the current sensor 12, and the measured current value, i.e., a detected signal I is inputted in a controller 14, which outputs a control signal to a driving circuit 10 on the basis of the detected signal I. Judgement that an output overcurrent of the battery 4 has been generated is performed by using the control signal, when the detected signal I measured by the current sensor 12 exceeds the previously set reference value. The control signal stops the outputs of a generator 18 and an inverter 6, and then operates the breaker 8. |
