Motor control circuit having self-detection function on resistance-meeting condition

• Main Authors: WANG YING, LIANG JIANMING, PENG HUI, OU HAIFEI, HUANG QIJUN, SHEN XIANGHUA
• Format: Patent
• Language: Chinese; English
• Published: 25.09.2013
• Subjects: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

Disclosed in the utility model is a motor control circuit having a self-detection function on a resistance-meeting condition. The motor control circuit comprises a controller and a motor; a positive-negative driving circuit for driving positive and negative motions of a motor is electrically connected between the controller and the motor. Besides, the motor control circuit also includes a current sampling circuit that is used for detecting whether a drive current of the motor is increased to enable the controller to conveniently determine whether a resistance meeting phenomenon occurs at the motor; a detection signal input terminal of the current sampling circuit is connected with a motor drive current detection terminal; and a detection signal output terminal of the current sampling circuit is connected with a detection signal input terminal of the controller. The utility model aims at determining whether the resistance meeting phenomenon occurs at the motor by detecting whether the drive current of the moto