U-shaped stator hybrid-excitation switch reluctance machine

Abstract

An U-shaped stator hybrid-excitation switch reluctance machine belongs to the field of an electrical machine. The U-shaped stator hybrid-excitation switch reluctance machine comprises a rotor and a plurality of U-shaped stator blocks arranged at the circumference of the rotor, the outer side of rotor teeth of the rotor is shaped as outer arc, the inner side of stator teeth of the U-shaped stator blocks is shaped as inner arc, a gap is arranged between the outer arc of the rotor teeth and the inner arc of the stator teeth, the plurality of U-shaped stator blocks form a modular stator, excitation windings are wound around the two stator teeth of each U-shaped stator block, a permanent magnet is arranged at the inner side of each U-shaped stator block, and the magnetizing direction of the permanent magnet is magnetized tangentially. When the phase number of the electrical machine is m phases, the number rate of the stator teeth to the rotor teeth of the electrical machine is 2m to (2m-1), for example, when the phase number of the electrical machine is three phases, the electrical machine is structurized with three phase 6 / 5 and three phase 12 / 10. In the U-shaped stator hybrid-excitation switch reluctance machine, the stator is the modular stator, modular production is promoted, interphase magnetic paths are not coupled and completely separated, and meanwhile, the electrical machine has the advantages of high output, simplicity in structure, high fault-tolerance capability and high reliability, is easy to maintain, and is convenient to control.

Description

Technical field: [0001] The invention belongs to the field of motors, in particular to a U-shaped stator hybrid excitation switched reluctance motor. Background technique: [0002] 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 are neither permanent magnets nor windings 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 not only increases the cost of the drive system, but also reduces the power density of the motor and torque density. [0003] In order to overcome the shortcomings of traditional switched reluctance motors, it is proposed to embed permanent magnets in the motor to...

AI Technical Summary

Problems solved by technology

[0004] Chinese invention patent 200910263110.6 proposes a hybrid excitation block-type stator-rotor switched reluctance motor. Adjacent stator blocks are separated by a magnetic isolation plate. The magnetic isolation performance is closely related to the material properties of the magnetic isolation plate. It cannot be completely separated, and the cost will increase accordingly, and the excitation windings of each phase are respectively straddled in the opposite U-shaped stator slots, resulting in longer winding ends, increased copper loss, and reduced motor efficiency

Images