Method for efficiently operating switch reluctance (SR) motor at low and high speed and SR motor thereof

Abstract

The invention discloses a method for efficiently operating a switch reluctance (SR) motor at low and high speed and the SR motor, wherein the SR motor can efficiently operate at high and low speed, and in particular, the advantages of an electric vehicle can be exerted when the SR motor is used in the electric vehicle as a direct-driven hub motor. The method comprises the following steps of: each phase of winding of the SR motor is divided into sub windings to be wound on all the salient poles of the phase, and the sub winding on each salient pole is respectively provided with an initial end wire and a tail end wire; the initial end wire and the tail end wire of each sub winding of each phase of winding are led out from the motor to be connected onto a serial-parallel connection switching device, and the serial-parallel connection switching device connects the sub windings of each phase of winding in a serial or parallel mode and is switched between the serial mode and the parallel mode; and when the SR motor operates at low speed, the serial-parallel connection switching device connects the sub windings of each phase of winding in the serial mode, and when the SR motor operates at high speed, the serial-parallel connection switching device connects the sub windings of each phase of winding in the parallel mode.

Description

technical field [0001] The invention relates to an SR motor, in particular to a method for enabling the SR motor to operate with high efficiency in both low-speed and high-speed segments and the SR motor. Background technique [0002] According to statistics, the power consumption of motors is about 60% of the power consumption of the entire grid. Therefore, improving the operating efficiency of the motor is an important measure for energy saving, especially in the application field of speed regulation technology. Since the motor has high efficiency when it operates at the rated high speed range, in order to meet the high and low speed operation requirements of the driven equipment at the same time, it is usually necessary to pass Mechanical gear shift mechanism transmission. As a result, the mechanical transmission gap and transmission friction loss are increased, and the efficiency and dynamic response of the entire speed control system are also reduced. And the electric...

AI Technical Summary

Problems solved by technology

Although this technical solution can make the gap in the overlapping part of the stator core and the rotor core change gradually instead of suddenly, so that the torque does not change suddenly, thereby reducing the noise generated by the rotor rotation, but for SR motors at low speeds and Operational efficiency improvements in the high-speed segment did not help further

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