MOTOR OVERVOLTAGE PROTECTION CIRCUIT, UNDERVOLTAGE PROTECTION CIRCUIT, VOLTAGE PROTECTION CIRCUIT AND MOTOR

WIPO Patent Application WO/2021/012866

A1

A motor overvoltage protection circuit, an undervoltage protection circuit, a voltage protection circuit and a motor, wherein the motor overvoltage protection circuit comprises: a first controllable switch, a control terminal of the first controllable switch receiving a bus voltage collection signal of a motor, and a first terminal being grounded; and a second controllable switch, a control terminal of the second controllable switch being connected to a second terminal of the first controllable switch, a first terminal being grounded, and a second terminal being connected to a fault detection terminal of a driving chip of the motor. The overvoltage protection of the motor is achieved by means of the described circuit. The described motor overvoltage protection circuit has the characteristics of a simple circuit structure, low costs, and a wide application range. Overvoltage protection is achieved by means of using the inherent protection function of the driving chip, which will not occupy existing working circuit ports, thereby reducing the demands of the overvoltage protection function on chip resources without simultaneously affecting the existing protection function of the circuit.

QUAN WEI (CN)
ZHANG XIAOFEI (CN)
AO WENBIN (CN)
WANG YANZHANG (CN)
LI NING (CN)

PCT/CN2020/098023

January 28, 2021

June 24, 2020

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GREE ELECTRIC APPLIANCES INC ZHUHAI (CN)

H02H7/00; H02P6/00

CN110416973A	2019-11-05
CN208489807U	2019-02-12
CN104423517A	2015-03-18
CN209001565U	2019-06-18
CN105024595A	2015-11-04
CN102543500A	2012-07-04
US6064175A	2000-05-16

ADVANCE CHINA IP LAW OFFICE (CN)

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