STARTUP CONTROL CIRCUIT, POWER TOOL, AND STARTUP CONTROL METHOD THEREOF

Abstract: a startup control circuit includes a direct current (dc) conversion circuit, a main control unit, a first switch circuit and a second switch circuit. the first switch circuit is connected to the battery pack and the dc conversion circuit. the second switch circuit is connected to a battery pack, the dc conversion circuit, and a main control unit. the first switch circuit is configured to activate the dc conversion circuit to supply power to the second switch circuit and the main control unit after the first switch circuit is triggered. the second switch circuit outputs different voltage waveforms based on different timing sequences of currents flowing from the battery pack and the dc conversion circuit to the second switch circuit. the main control unit is configured to output a first drive command when receiving a first voltage waveform.

Inventor(s): Zefeng Wei, Biao Li

CPC Classification: H02P1/18 (for starting an individual dc motor)

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