Multi-winding multi-speed permanent magnet motor for electric vehicle

• Main Authors: LUO SHOUYUAN, YANG WENBO, ZHANG YANG
• Format: Patent
• Language: Chinese; English
• Published: 28.07.2017
• Subjects: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DYNAMO-ELECTRIC MACHINES; ELECTRICITY; GENERATION

The invention relates to a multi-winding multi-speed permanent magnet motor for an electric vehicle, which belongs to permanent magnet synchronous motors and brushless DC motors. The motor comprises a plurality of sub-windings in a three-phase winding unit. Leads are drawn from connection points of the sub-windings connected in series of all the phase winding units and are used as phase lines. Each phase line is corresponding to a rated rotational speed, n sub-windings are corresponding to n phase lines connected with n switches, and the motor has n modes for switching during running. When the motor runs, through running mode switching, the motor runs in a high-efficiency interval no matter if the running is at a high speed or a low speed. Via the above way, the invention provides a unique technical scheme to solve the problems that the efficiency of electric vehicles is low during low-speed driving, and heavy load or slope climbing of electric vehicles relies on increasing the current and compressing the mot