Hybrid magnetizing permanent magnet synchronous motor structure

Abstract

The invention belongs to the technical field of permanent magnet motor structures, and particularly relates to a hybrid magnetizing permanent magnet synchronous motor structure. The motor body comprises a stator, a winding, a permanent magnet, a rotor core and a rotating shaft. The stator and the winding jointly form a fractional slot concentrated winding, the permanent magnets are arranged in a radial and axial mixed magnetizing manner, and the rotor core adopts a fan-shaped lamination. The technical key points are that the concentrated arrangement of the stator windings enables the torque density of the motor to be improved, the weak magnetic performance to be better, and the motor efficiency to be improved; the permanent magnets are radially magnetized and axially magnetized, and are sequentially mixed and arranged in the rotor core, so that the inter-electrode axial leakage flux of the motor is reduced, the magnetic flux density amplitude is improved, and the electromagnetic torque output range is enlarged; the rotor core is assembled by laminating the fanning strips, so that the magnetic leakage at the end part and inside the rotor can be effectively inhibited, the power density is increased, and the material cost of the motor is reduced.

Description

technical field [0001] The invention relates to the technical field of permanent magnet motor structures, in particular to a hybrid magnetization permanent magnet synchronous motor structure. Background technique [0002] Permanent magnet synchronous motors have the advantages of small size, high operating efficiency and high power density, and are widely used in many fields of industrial development and daily life. However, the magnetic flux leakage phenomenon occurs at the rotor end, inner surface and axial direction of the traditional permanent magnet motor, resulting in small output torque and large loss. At present, the price of permanent magnet raw materials such as rare earth is still relatively expensive, and it is necessary to innovate the structural process and optimize the design, so that the permanent magnet synchronous motor has a broader development space and obtains a wider range of applications. SUMMARY OF THE INVENTION [0003] The purpose of the inventio...

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Problems solved by technology

However, magnetic flux leakage occurs at the end, inner surface and axial position of the rotor of the traditional permanent magnet motor, resulting in small output torque and large loss

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