Energy-saving permanent magnetism switched reluctance motor

Abstract

The invention discloses an energy-saving permanent magnetism switched reluctance motor, belonging to the field of motors. The motor comprises a rotor and a plurality of H-shaped stator blocks arranged on the circumference of the rotor, wherein the outer side of each rotor tooth of the rotor is an outer arc, the inner side of each stator tooth of the H-shaped stator blocks is an inner arc, and a gap is formed between the outer arc of the rotor tooth and the inner arc of the stator tooth; the plurality of H-shaped stator blocks form a modularized stator, a permanent magnet is arranged on the inner wall of each H-shaped stator block, and the polarity of the permanent magnets is in homo-polar superposition with the electromagnetic polarity produced by H-shaped stator block exciting windings. When the number of phases of the motor is N, the number ratio of the stator teeth to the rotor teeth of the motor is 2N: (2N-1), for example, when the number of phases of the motor is 3, the motor is a three-phase 6 / 5 structure or a three-phase 12 / 10 structure. The stator of the motor is a modularized stator, so that modularized production can be realized, inter-phase magnetic circuits are not coupled and are completely isolated, meanwhile, the motor is high in power, simple in structure, easy to maintain, strong in fault tolerance, convenient to control and high in reliability.

Description

Background technique: [0001] The stator and rotor of the traditional switched reluctance motor are salient pole structures. By sequentially energizing the stator excitation winding, the rotor poles interact with the stator poles to generate torque. Since there is neither permanent magnet nor winding on the rotor, the structure of the motor is simple and the reliability is high. But because neither the stator nor the rotor uses permanent magnets, in order to obtain greater output torque and power, it can only be achieved by increasing the excitation power, which increases the cost of the drive system and reduces the power density of the motor and torque density. [0002] In addition, in the traditional switched reluctance motor, when one of the adjacent phases is working, the other phases interfere with each other through the salient poles of the rotor, and the magnetically conductive stator yokes are connected to each other. The magnetically conductive magnetic path of the wo...

AI Technical Summary

Problems solved by technology

But because neither the stator nor the rotor uses permanent magnets, in order to obtain greater output torque and power, it can only be achieved by increasing the excitation power, which increases the cost of the drive system and reduces the power density of the motor and torque density

[0002] In addition, in the traditional switched reluctance motor, when one of the adjacent phases is working, the other phases interfere with each other through the salient poles of the rotor, and the magnetically conductive stator yokes are connected to each other. The magnetically conductive magnetic path of the working magnetic poles is long, and the iron loss is large. big loss

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