ELECTRIC TOOL AND MOTOR DRIVE SYSTEM

摘要

An electric tool and a motor drive system are provided. The motor drive system includes a trigger switch, an electronic switch, and a switch control circuit connected between the trigger switch and the electronic switch. The trigger switch is connected in series to a power supply. The electronic switch is configured to control a motor to be powered on or powered off. The switch control circuit is configured to control the electronic switch based on a state of the trigger switch, wherein the electronic switch is delayed to be turned off after the trigger switch is turned off to control the motor to be powered off later than a time that the trigger switch is turned off.

主权项

1. A motor drive system comprising:
an inverter coupled to a power supply comprising a plurality of semiconductor switch elements and configured to convert a voltage provided by the power supply into alternating current power to power an electric motor; a motor drive control circuit configured to output a drive signal to control a power mode of the semiconductor switch elements in the inverter; a trigger switch; an electronic switch connected between the power supply and the motor drive control circuit; and a switch control circuit coupled to the trigger switch and the electronic switch and configured to turn on or turn off the electronic switch based on a state of the trigger switch.