Permanent magnet motor rotor structure for electric automobile

Abstract

The invention discloses a permanent magnet motor rotor structure for an electric vehicle. The permanent magnet motor rotor structure comprises an iron core, a first magnetic steel groove group, a second magnetic steel groove group, a first magnetic steel group, a second magnetic steel group and a magnetic barrier, and is characterized in that the magnetic barrier, the first magnetic steel groove group and the second magnetic steel groove group are fixed on the iron core, the first magnetic steel group and the second magnetic steel group are embedded in the first magnetic steel groove group and the second magnetic steel groove group respectively, the included angle of the first magnetic steel groove group ranges from 115 degrees to 175 degrees, the included angle of the second magnetic steel groove group ranges from 75 degrees to 120 degrees, and at least one position of the magnetic barrier is placed in the middle of the second magnetic steel group. According to the invention, a linear magnetic steel group in a traditional V+- linear rotor structure is changed into a v shape, so that the utilization rate of magnetic steel is increased, and the yield strength of a material at a high rotating speed is improved; and by arranging the magnetic barrier, a magnetic isolation effect is achieved, and the utilization rate of the magnetic steel is improved.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a permanent magnet motor rotor structure for electric vehicles. Background technique [0002] With the rapid increase of car ownership worldwide and the intensification of vehicle exhaust emissions, the resulting resource and environmental problems have become increasingly prominent. research and development as the focus of scientific research. At present, the drive motors for electric vehicles are pursuing high power density, high efficiency and low cost. In order to achieve the above goals, it is necessary to deeply optimize the structure of the motor rotor magnetic circuit, improve the reluctance torque of the motor and reduce the air gap magnetic density resonance. wave content. [0003] For example, the Chinese Patent Publication No. CN202260721U has a built-in rotor structure of a permanent magnet motor. By adopting a "V+one" rotor magnetic circuit structure, the structure...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: the material yield strength of the rotor structure is poor at high rotational speeds and the utilization rate of the magnet steel is low, and a permanent magnet motor rotor structure for electric vehicles is provided

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