Patent ID: 11942888
Assignee: NANJING CHERVON INDUSTRY CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  E | IPC E  H

Claim 12:
13. A power tool, comprising:
a power interface configured to be connected to a power supply;
a motor;
a driver circuit having a plurality of switching elements for driving the motor;
at least one capacitor configured to filter out current spikes in the power supply;
at least one capacitor switch connected to the at least one capacitor and configured to control a working state of the at least one capacitor, each of the at least one capacitor comprises a first capacitor and a second capacitor, each of the at least one capacitor switch comprises a first switch, and the first switch is connected to the first capacitor and configured to control an on or off state of the first capacitor, each of the at least one capacitor switch further comprises a second switch, the second switch is connected to the second capacitor and configured to control an on or off state of the second capacitor;
a temperature detection unit configured to detect a temperature of a related object, wherein the related object comprises a working environment in which the power tool is located and/or the at least one capacitor and/or the motor; and
a controller electrically connected to the at least one capacitor switch and configured to control an on or off state of the at least one capacitor switch,
wherein the controller is configured to:
acquire the temperature of the related object;
control the at least one capacitor switch to be in a first on or off state such that the at least one capacitor works in a first working state when the temperature is lower than a temperature threshold;
control the at least one capacitor switch to be in a second on or off state such that the at least one capacitor works in a second working state when the temperature is higher than the temperature threshold; control the first switch to be turned on such that the first capacitor is in a working state and control the second switch to be turned off such that the second capacitor is in a non-working state when the temperature is lower than the temperature threshold; and
control the first switch to be turned off such that the first capacitor is in a non-working state and control the second switch to be turned on such that the second capacitor is in a working state when the temperature is higher than the temperature threshold.