Motor driving structure with functional safety

• Main Authors: LIU XIANG, YUE SHAOPENG, LUO LAIJUN, QIU GUOHUA
• Format: Patent
• Language: Chinese; English
• Published: 01.03.2022
• 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

The invention discloses a motor driving structure with functional safety, which is characterized in that a power supply circuit supplies power to an MCU (Microprogrammed Control Unit), monitors whether an MCU program runs normally in real time, and outputs an MCU reset signal to the MCU and a first input pin of a logic circuit if the MCU fails; the MCU outputs a first enable signal to an enable pin of the motor driving chip, outputs a driving signal to an input pin of the motor driving chip, performs SPI communication with the motor driving chip, and outputs a second enable signal to a second input pin of the logic circuit; the logic circuit performs logic judgment on the MCU reset signal and the second enable signal and then outputs a control signal to the first control end and the second control end of the motor driving circuit; the motor driving circuit is used for driving or stopping the motor, the third to sixth control ends are connected with the motor driving chip, the power input end is connected with