Segmented oblique pole rotor and permanent-magnet synchronous motor

Abstract

The invention provides a segmented oblique pole rotor and a permanent-magnet synchronous motor. The segmented oblique pole rotor comprises a rotating shaft and a rotor core, wherein the rotor core comprises a first core segment and a second core segment which are adjacently arranged along the axial direction; each of the first core segment and the second core segment comprises a plurality of core units which are arranged along the axial direction; an even number of uniformly distributed magnetic poles are arranged on the periphery of each core unit; started from the joint of the first core unit and the second core unit, a preset angle difference exists between like magnetic pole center lines of two adjacent core units in the first core segment along a first rotating direction in sequence; a preset angle difference exists between like magnetic pole center lines of two adjacent core units in the second core segment along a second rotating direction in sequence; and the first rotating direction is opposite to the second rotating direction. Like magnetic pole centers of the core units of the rotor core are sequentially staggered in a mirror symmetry manner and the axial additional force is eliminated, so that the reliability of the permanent-magnet synchronous motor is improved.

Description

technical field [0001] The invention relates to the field of permanent magnet synchronous motors, in particular to a segmented skew pole rotor and permanent magnet synchronous motors. Background technique [0002] With global warming and the increasing energy crisis, it has become an inevitable trend for new energy vehicles to replace existing fuel vehicles. Permanent magnet synchronous motors have become the first choice for new energy vehicle drive motors due to their high torque density, high efficiency, and high power density. [0003] Since the permanent magnets in the permanent magnet synchronous motor will not change the magnetic strength according to the position and state of the motor, the magnetic poles of the magnets will have different attractive forces on the stator teeth and slots during the operation in the circumferential direction. The force will cause the torque to fluctuate when the rotor rotates, and this fluctuation will cause the vibration and noise of...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a new segmented oblique pole rotor and permanent magnet synchronous motor for the above-mentioned problem that the segmented poles of the rotor cause axial movement of the motor while solving noise reduction.

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