Patent ID: 11939985
Assignee: JIANGMEN KEYE ELECTRIC APPLIANCES MANUFACTURING CO., LTD
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F  H

Claim 10:
11. A fan, comprising:
a fan body;
a storage battery;
a motor for driving the fan body, powered by the storage battery; and
a control circuit for the motor, comprising:
a motor drive unit, configured to provide a drive current for the motor according to a modulation signal;
a processing control unit, configured to obtain an actual speed r0 of the motor, calculate the modulation signal according to a difference between the actual speed r0 and a target speed r1, and transmit the modulation signal to the motor drive unit; and
wherein the modulation signal is used to control rotation of the motor by modulating the drive current to make the difference tend to zero.