A phase-to-phase coupled axial flux reluctance motor without stator yoke

Abstract

The present invention proposes an axial flux reluctance motor with phase-to-phase coupling without a stator yoke, which includes a stator and an axial double-sided rotor. , the stator windings are wound radially around the stator teeth. The rotor adopts block or non-block structure. When the block structure is adopted, the rotor is composed of a U-shaped laminated iron core and a non-magnetic frame, which are evenly distributed on both axial sides of the stator teeth and embedded in the non-magnetic frame; when a non-block structure is adopted , the rotor is composed of a whole permeable core. The motor proposed in the present invention has coupling between two adjacent energized phases, which can not only shorten the length of the motor magnetic flux path, reduce the loss, volume and cost of the motor, but also increase the conduction time of each phase, improve the utilization rate of the winding, and reduce the torque ripple , to increase the power density and torque density of the motor; at the same time, the rotor structure on both sides of the axial direction can also effectively avoid unilateral magnetic pull, reduce operating noise, and improve the stability of motor operation.

Description

technical field [0001] The invention provides an interphase coupled axial flux reluctance motor without a stator yoke. Background technique [0002] The stator of the switched reluctance motor has only a few concentrated windings, the stator coils are easy to embed, the ends are firm, and the reliability is high, while the rotor has no windings and no permanent magnets, which can allow a large temperature rise, that is, the motor has a simple structure and low cost. Good mechanical flexibility, each phase stator winding can work independently, the motor is not easy to deform at high speed, and the power circuit is simple and reliable. It is widely used in various high-speed operation, high output and high efficiency occasions. It is the most promising drive motor at present. [0003] Conventional switched reluctance motors mostly adopt the structure of stator concentrated winding and tooth-level rotor. The internal magnetic flux circuit of the motor with this structure is lo...

AI Technical Summary

Problems solved by technology

[0003] Conventional switched reluctance motors mostly adopt the structure of stator concentrated winding and tooth-level rotor. The internal magnetic flux circuit of the motor with this structure is long, which will cause large iron loss and eddy current loss, and the paths of the magnetic flux circuits of each winding overlap each other. If A broken part of the stator or rotor has a great influence on the magnetic circuit of the motor, resulting in poor fault tolerance of the motor; at the same time, the stator of the traditional switched reluctance motor has a yoke, and the direction of the magnetic flux in the yoke of the stator will change according to the conduction of different phases. Further increase the iron loss and eddy current loss of the motor. At this time, the motor will easily heat up the stator yoke when the motor runs for a long time. This is the disadvantage of the stator yoke motor.

[0004] In the traditional radial flux motor, the stator winding is embedded in the stator cogging, and its cogging effect will cause large torque ripple and eddy current loss when the motor rotates, which not only reduces the dynamic response speed of the motor but also produces a large vibration and noise

With the further improvement of motor performance requirements in more and more application industries, the traditional radial flux motor can no longer meet the needs of the industry. An axial flux motor has the advantages of simple structure, small size, light weight and high efficiency. has attracted the attention of a large number of researchers

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