Application method of mixed permanent magnets in flux-switching permanent magnet motor

Abstract

The invention discloses an application method of mixed permanent magnets in a flux-switching permanent magnet motor, and relates to stator-core motors with permanent magnets. Rare-earth permanent magnets with high magnetic energy products are mounted at yoke positions of a stator module of the flux-switching permanent magnet motor. Ferrite permanent magnets with low magnetic energy products are mounted at tooth positions close to the motor stator module. The rare-earth permanent magnets with the high magnetic energy products and the ferrite permanent magnets with the low magnetic energy products are connected to be integrated into the mixed permanent magnets. The mixed permanent magnets with clockwise magnetization directions are mounted on one side of the motor stator module. The mixed permanent magnets with anticlockwise magnetization directions are mounted on the other side of the motor stator module. The mixed permanent magnets with the clockwise magnetization directions and the mixed permanent magnets with the anticlockwise magnetization directions are alternately mounted on two sides of the motor stator module. The defects of ultrahigh cost of existing flux-switching permanent magnet motors, serious magnetic saturation of teeth, reduction of motor torque density and large cogging torque are overcome.

Description

technical field [0001] The technical scheme of the invention relates to a motor with a stator core of permanent magnets, in particular to an application method of a hybrid permanent magnet in a magnetic flux switching permanent magnet motor. Background technique [0002] Since the permanent magnet of the flux switching permanent magnet motor is installed on the stator of the motor, and there is neither permanent magnet nor winding on the rotor, its structure is very stable, and it is a new type of permanent magnet motor with high fault tolerance. Compared with other stator-type permanent magnet synchronous motors, such as flux inversion permanent magnet motors and double salient pole permanent magnet synchronous motors, due to the special flux-gathering structure of the flux switching permanent magnet motors, it can generate High magnetic flux density, and the flux switching permanent magnet motor is a bipolar permanent magnet motor, which makes the effective flux utilizatio...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide the application method of the hybrid permanent magnet in the flux switching permanent magnet motor, and use the hybrid permanent magnet connected by two kinds of permanent magnets with different magnetic properties in the stator of the flux switching permanent magnet motor. Magnet, that is, a rare earth permanent magnet with high energy product is installed near the stator yoke of the motor, and a ferrite permanent magnet with low energy product and low price is installed near the teeth of the motor stator, which overcomes the magnetic flux switching of the prior art The manufacturing cost of permanent magnet motors is too high, and the use of permanent magnets with high magnetic energy product makes the magnetic flux density generated by the teeth of the motor stator too high, which leads to serious magnetic saturation of the teeth, resulting in a decrease in the torque density of the motor and a very large cogging torque.

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