| 摘要 |
A control device for controlling current to a motor includes a current sensor connected to a power module for generating an electric signal corresponding to magnitude of the current to the motor, and a processor connected to first and second current detecting circuits, which are connected to the current sensor and the power module. The first current detecting circuit determines whether the current to the motor is larger than a first predetermined value, and generates a first flag signal provided to the power module. The second current detecting circuit determines whether the current to the motor is larger than a second predetermined value, which is larger than the first predetermined value, and generates a second flag signal provided to the power module. The power module inhibits connection between the motor and a power supply unit upon receiving either one of the first and second flag signals. The processor generates a first flag reset signal to the first current detecting circuit at a first reset frequency for resetting the first flag signal periodically, and a second flag reset signal to the second current detecting circuit at a second reset frequency for resetting the second flag signal periodically.
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