Patent ID: 11938605
Assignee: NANJING CHERVON INDUSTRY CO., LTD.
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 13:
14. An angle grinder, comprising:
a housing;
a motor disposed in the housing;
a tool interface configured to connect to a power supply to the motor;
a control system comprising a control circuit and configured to control a rotation of the motor; and
a master switch disposed on a current path formed by the tool interface and the control system;
wherein the master switch has an on state in which electric connection between the tool interface and the control circuit is on and an off state in which the electric connection between the tool interface and the control circuit is off, the control system comprises a protection circuit connected between the master switch and the control circuit, and the protection circuit is configured to disconnect connection between the tool interface and the control circuit in response to the master switch being in the on state before the tool interface connects to the power supply, and
wherein a first power supply branch further comprises a first triode, at least one end of the first triode is connected to a capacitor, and the first triode is configured to turn on in response to a discharge of the capacitor.