Partitioning external rotor switch reluctance motor

Abstract

The invention relates to a partitioning external rotor switch reluctance motor. A rotor is a partitioning external rotor structure. Multiple independent rotor bodies and non-magnetic-conductive bodies are included. The rotor bodies are fixedly arranged on upper surfaces of the non-magnetic-conductive bodies. Each independent rotor body, an adjacent excitation pole and an auxiliary pole form an independent magnetic flux loop. Because of the rotor structure, electromagnetic isolation between the rotors is generated. Compared to a long magnetic flux path, a motor of a short magnetic flux path can be used to reduce a magnetomotive force easily. Because the short magnetic flux path is used, in a stator and the rotor, there is no reversion in a magnetic flow; during a motor rotation commutation process, a negative torque is not generated; the motor adopts a concentrated winding so that a number of turns of the motor is reduced; and under a same input condition, motor copper losses are less, iron core losses are less too, an output torque is large, and output efficiency of the motor is high.

Description

technical field [0001] The invention belongs to the technical field of reluctance motors, in particular to a switched reluctance motor with block outer rotors. Background technique [0002] Switched reluctance motor is a new type of variable speed drive system developed with the rapid development of power electronics, microcomputer and control theory in the early 1980s. With outstanding advantages such as simple structure, reliable operation, low cost and high efficiency, it has become a strong competitor of AC motor speed control system, DC motor speed control system and brushless DC motor speed control system. However, due to the large torque ripple and noise of the switched reluctance motor, the output torque is low and other shortcomings. The noise of the motor can be effectively reduced by intelligently controlling and optimizing the structural size of the motor. In addition, the torque and efficiency of the motor must be improved. Like other motors, switched reluctan...

AI Technical Summary

Problems solved by technology

[0003] The magnetic flux path of the traditional switched reluctance motor is long, and the rotor is an inner rotor with a salient pole structure, and the magnetic flux reversal will occur during the commutation of the motor rotation, resulting in a decrease in the output torque of the motor, an increase in iron loss, and wind friction loss. increase, and decrease in efficiency, etc.

The traditional segmented stator switched reluctance motor has large switching losses, and the rotor is subjected to unbalanced forces; while the traditional segmented rotor switched reluctance motor adopts distributed windings, which leads to an increase in the end of the motor winding and increased copper consumption

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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