| 摘要 |
The 3-phase brushless DC motor driving circuit without a rotator position detector includes a plurality of resistors connected to rotator driving coils, first to third comparators for respectively comparing terminal voltages detected by the resistors with a reference voltage, first to third driving transistors for turning on the rotator driving coils, and first to third switching transistors for cutting off current of the rotator driving coils, thereby achieving low power consumption.
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