Switched reluctance motor with 8/9 structure

Abstract

The present invention relates to a switched reluctance motor with 8 / 9 structure. The switched reluctance motor provided by the invention is a block rotor equipped switched reluctance motor having a four-phase eight-pole stator and a nine-pole rotor. Fixedly arranged on the motor shell, the stator is provided with exciting poles and auxiliary poles alternately; the rotor comprises nine independent rotor poles and a non-conductive magnet. All the rotor poles are embedded in the non-conductive magnet evenly; each of the independent rotor poles forms an independent magnetic flux circuit with its adjacent exciting pole and auxiliary pole. The internal part of the rotor is provided with a motor shaft penetrating through the rotor center and driving the rotor to move. Because of the short flux path, there is no reversal of magnetic flux in the stator and rotor. In the process of motor rotating and phase changing, no negative torque will be generated. In addition, the motor adopts single-phase concentrated winding. The number of motor turns decreases; and required end winding is reduced so much that it can be neglected. Under the same input condition, the motor copper consumption is small, the core loss is small, the output torque is large, and therefore, the output efficiency of the motor is increased.

Description

technical field [0001] The invention relates to the field of reluctance motors manufactured by automobiles, in particular to a switched reluctance motor with an 8 / 9 structure. Background technique [0002] The research on switched reluctance motors started 150 years ago. Due to the development of microcontrollers in recent decades, switched reluctance motors have been widely concerned. Different from other types of motors, the switched reluctance motor is a double salient pole, single excitation motor with simple structure and good fault tolerance. Switched reluctance motors require a commutator to operate, so switched reluctance motors can operate at different speed levels. However, due to the shortcomings of switched reluctance motors such as large torque ripple and noise and low output torque, the market share of switched reluctance motors has been ignored. In order to compete with other types of motors, existing problems must be solved and the advantages of switched re...

AI Technical Summary

Problems solved by technology

[0003] In the traditional 8 / 6 structure switched reluctance motor, the two opposite excitation poles form a phase, and the magnetic flux path is long. The stator and rotor are double salient pole structures, and the magnetic flux will reverse during the commutation process of the motor rotation. , resulting in a decrease in the output torque of the motor, an increase in iron loss, an increase in wind friction loss, and a decrease in efficiency, etc.

Traditional segmented stator switched reluctance motor, low utilization rate of iron core, small torque

However, the traditional segmented rotor switched reluctance motor adopts distributed winding, which leads to the increase of the end of the motor winding and the increase of copper loss.

Therefore, in the design process of the motor structure, how to increase the output torque of the motor, reduce losses, and improve output efficiency has become a major obstacle in motor design.

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