Controllable flux permament magnetic synchronous motor of built-in mixed rotor magnetic path structure

Abstract

This invention provides a controlled flux magnet synchronous motor of integral hybrid rotor magnetic-circuit structure including a motor splindle, a stator winding, a rotor iron core, a AlNiCo magnet, NdFeB magnet and a rotor iron core, in the rotor iron core, the magnets are place in W shape, AlNiCo is set tangentially and the NdFeB is set in radial position which can be a parallelogram or a rectangle considering the limit of the rotor space. The advantage is that an ampltude controlled d-axis vector is applied to alter the magnetization intensity of the rotor magnet and memerizes the altered flux density.

Description

technical field

[0001] The invention belongs to motor and electric drive control, in particular to a permanent magnet synchronous motor with a built-in hybrid rotor structure magnetic circuit and magnetic flux controllable. Background technique

[0002] Generally, in the design of the rotor magnetic circuit and the size determination of the permanent magnets of traditional permanent magnet synchronous motors, it should be considered that the demagnetization of the permanent magnets should be prevented even under the most extreme working conditions. This means that at the maximum operating temperature, the thickness of the permanent magnets in conventional permanent magnet motors is large enough that the demagnetizing magnetomotive force generated by the armature reaction is lower than the coercive force of the permanent magnets. This is because in traditional permanent magnet motors, especially rare earth permanent magnet motors, once the permanent magnets are demagnetized, ...

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