Brush direct current motor fault diagnosis circuit and diagnosis method

• Main Authors: ZHANG YOUCHUANG, LIU KEQING, LI LI, CAO TENGHUA, ZHOU XIANFENG, TIAN HUA
• Format: Patent
• Language: Chinese; English
• Published: 01.10.2021
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention relates to a brush direct current motor fault diagnosis circuit and a diagnosis method. The brush direct current motor fault diagnosis circuit comprises a motor driving circuit, a motor voltage detection circuit, a pull-up circuit and a central processing unit, wherein the motor driving circuit is connected with the M+ end and the M- end of a motor, the motor voltage detection circuit carries out voltage sampling on the M+ end and the M- end of the motor, the signal output end of the motor voltage detection circuit is connected with the central processing unit, the signal input end of the motor voltage detection circuit is connected with the pull-up circuit and used for receiving pull-up voltage transmitted by the pull-up circuit, the pull-up circuit is connected with the central processing unit, pull-up opening and closing are controlled through control signals of the central processing unit, and the pull-up circuit performs pull-up voltage sampling in a resistance voltage division mode and tra