| 摘要 |
<p>PURPOSE:To prevent the wirings from burning out, by cutting off the feeding current from a power element to a motor, and cutting off the voltage applied to an electromagnetic clutch, when a short circuit of the power elements is detected by a control unit. CONSTITUTION:A power element short circuit judging device 9f judges that power elements 9i1-9i4 which compose a power element unit 9i are short- circuited, if the motor current measurement value by a motor current measuring device 9c is at an instructed current value or more and the difference is at a specific value or more, when a current flowing to a motor 14 is directed, and outputs the result. A power element control device 9h outputs ON, OFF signals to control the current flowing direction ad the current value to the motor 14, to the power element unit 9i, depending on the output of a motor current deciding device 9e. An electromagnetic clutch control device 9g connects or disconnects an electromagnetic clutch 15 depending on the condition determined by the car speed and the output condition of a power element short circuit judging device 9f.</p> |
