Low-torque pulsation high-speed axial flux surface-mounted permanent magnet motor

Abstract

The invention provides a low-torque pulsation high-speed axial flux surface-mounted permanent magnet motor, which comprises two axially arranged rotors and a stator located between the two rotors, andthe distances between the two rotors and the stator are unequal, i.e., the lengths of air gaps between the two rotors and the stator are unequal. Due to the structure of the high-speed axial flux permanent magnet motor, the centrifugal force borne by the rotor is orthogonal to the electromagnetic tensile stress direction, that is, the permanent magnet sheath part does not influence the axial effective air gap length, the design of the permanent magnet and the sheath thereof is more diversified, and the optimal design scheme can be found.

Description

technical field [0001] The disclosure belongs to the technical field of motors, in particular to a low-torque pulsation high-speed axial flux surface-mounted permanent magnet motor. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] High-speed motors are widely used in various industrial products because of their high power density, high efficiency, small size, and light weight. In some electric vehicle engine systems, a high-speed motor can be coaxially arranged with the turbine of the turbocharger and the impeller of the compressor. When starting and shifting electric vehicles, if there is insufficient energy in the exhaust gas flow, the high-speed electric motor can act as an electric motor to accelerate the compressor to the required speed, thereby reducing turbo lag and improving drivability. And if there is residual energy in the exh...

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Problems solved by technology

Among them, the rotor structure of the high-speed induction motor is relatively simple, which can withstand large centrifugal force and high temperature resistance, but the rotor loss is large, resulting in low power factor and efficiency of the motor; high-speed reluctance motors include switched reluctance motors and synchronous reluctance motors, and the rotor structure is simple , high mechanical strength, but high-speed reluctance motors have disadvantages such as high torque ripple, large mechanical vibration and large noise

Although the high-speed permanent magnet motor (radial flux motor) has the advantages of high power density, high power factor and high efficiency, the mechanical strength of the rotor structure and the existence of the permanent magnet sheath limit the performance improvement

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