Patent ID: 9716448
Date: 2017-07-25
CPC Classifications: A01D,H02J,H02K,H02P

Claim:
1. A control circuit of a power tool, comprising: a battery; an electric motor; an operation switch; a first control switch; a second control switch; a controller; and an inductive element; wherein the control circuit has a discharging state, a braking state and a charging state; wherein, in the discharging state, the operation switch is in a first switched-on state, the first control switch is switched on, the battery, the operation switch, the electric motor and the first control switch form a discharging circuit, and the electric motor consumes electric energy of the battery; wherein, in the braking state, the operation switch is in a second switched-on state, both the first control switch and the second control switch are switched on, the inductive element, the operation switch, the electric motor, the first control switch and the second control switch form a braking circuit, and the inductive element stores electric energy; wherein, in the charging state, the operation switch is in the second switched-on state, the first control switch is switched on, the second control switch is switched off, the battery, the inductive element, the operation switch, the electric motor and the first control switch form a charging circuit, and the inductive element charges the battery; and wherein the controller is electrically connected with the operation switch, the first control switch and the second control switch, respectively.