High-voltage direct-current brushless motor driving circuit

• Main Authors: LI KANG, LUO JINWANG, MA HONGYUE
• Format: Patent
• Language: Chinese; English
• Published: 09.12.2022
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROL OR REGULATION THEREOF; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

The utility model discloses a high-voltage DC brushless motor drive circuit, which comprises a Hall sensor, a control circuit, a power tube drive circuit and a three-phase half-bridge drive circuit, the three-phase half-bridge drive circuit comprises a half-bridge drive circuit, a bleeder circuit and a current sampling circuit, the three half-bridge drive circuits are connected in parallel, each half-bridge drive circuit corresponds to one phase of a motor, and each half-bridge drive circuit corresponds to one phase of the motor. Two NMOS (N-channel Metal Oxide Semiconductor) tubes are arranged on each path, and the G ends of the NMOS tubes are connected in series with current-limiting resistors; the bleeder circuits are arranged on the half-bridge driving circuit, each NMOS tube corresponds to one bleeder circuit, and the bleeder circuits are respectively connected with the power tube driving circuit and the NMOS tubes; according to the circuit, the switching speed of the power tube is matched by arranging t