US 11,939,985 B2
Control circuit for motor powered by storage battery and fan
Xiangming He, Jiangmen (CN); and Guanglian Lin, Jiangmen (CN)
Assigned to JIANGMEN KEYE ELECTRIC APPLIANCES MANUFACTURING CO., LTD, Guangdong Province (CN)
Filed by JIANGMEN KEYE ELECTRIC APPLIANCES MANUFACTURING CO., LTD, Jiangmen (CN)
Filed on Jan. 24, 2022, as Appl. No. 17/582,388.
Claims priority of application No. 202111101368.3 (CN), filed on Sep. 18, 2021.
Prior Publication US 2023/0087771 A1, Mar. 23, 2023
Int. Cl. H05K 7/20 (2006.01); F04D 25/08 (2006.01); F04D 27/00 (2006.01); F04D 29/00 (2006.01)
CPC F04D 25/08 (2013.01) [F04D 27/004 (2013.01); F04D 29/002 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A control circuit for a motor powered by a storage battery, 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.