A permanent magnet single-phase switched reluctance motor and its control method

Abstract

The invention discloses a permanent magnetism type single-phase switched reluctance motor. The permanent magnetism type single-phase switched reluctance motor comprise a motor output shaft, a control system and at least one set of armature device; the armature device comprises a stator and a rotor; air gaps are located between the salient poles of the stator and the rotor; the rotor fixedly sleeves the outer periphery of a motor output shaft; the number of the salient poles on the stator is consistent with the number of the salient poles on the rotor; stator electromagnetic windings are installed at the salient poles of the stator; the winding directions of adjacent stator electromagnetic windings are different; permanent magnets are embedded in the salient poles of the rotor; the magnetizing direction of the permanent magnets is radial; and the polarities of the permanent magnets embedded in adjacent salient poles of the rotor are different. The permanent magnetism type single-phase switched reluctance motor of the invention has the advantages of a conventional switched reluctance motor, and can eliminate the torque ripples of the conventional switched reluctance motor, realize bidirectional operation and improve the conversion efficiency of power source input energy. The power density of the motor can be improved. With the motor of the invention adopted, the purpose of energy conservation can be realized effectively.

Description

technical field [0001] The invention belongs to the field of motors, in particular to a permanent magnet type single-phase switched reluctance motor with reusable input energy and a control method thereof. Background technique [0002] The stator and rotor of the traditional two-phase switched reluctance motor are both salient pole structures, and the stator and rotor cores have the same number of teeth. The stator and rotor cores are single-segment cores. The pole interaction generates torque, so its structure is simple and its operation is reliable. [0003] In a conventional single-phase switched reluctance motor, due to consideration of the starting problem of the motor, it is generally necessary to deform the salient poles of the rotor of the motor so that the motor can achieve the purpose of self-starting. However, after the salient pole of the rotor is deformed, it is no longer the double salient pole structure in the original sense, so it will also lose or weaken th...

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Problems solved by technology

However, after the salient pole of the rotor is deformed, it is no longer the double salient pole structure in the original sense, so it will also lose or weaken the unique characteristics of the traditional double salient pole switched reluctance motor, and its control characteristics will also change, and this This kind of motor cannot realize bidirectional operation; in addition, the traditional single-phase switched reluctance motor has the disadvantages of large output torque fluctuation, low output torque density, and inability to produce continuous torque output.

[0004] In addition, if figure 1 As shown, in the control system of the traditional single-phase switched reluctance motor, the original energy in the stator winding needs to be released when the motor commutates. Or feed back the power supply by means of forced commutation, but at this time, the remaining energy of this part not only cannot do useful work, but also forms a reactive current, which will not only reduce the power factor of the motor, but may even affect the operation of the motor

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