A New 8/14 Two-Phase Switched Reluctance Motor

TL;DR

This paper introduces an innovative 8/14 two-phase switched reluctance motor design that improves efficiency and torque compared to conventional models by optimizing the rotor-stator tooth configuration.

Contribution

The paper presents a novel 8/14 TPSRM design with reduced core and copper losses, leading to higher efficiency and torque, validated through 2D FEM simulations.

Findings

Higher mean and peak torque compared to 8/12 TPSRM

Reduced core and copper losses

Improved torque density and efficiency

Abstract

Despite their simple and robust structure, low cost, and simple cooling system, switched reluctance motors (SRMs) face the challenge of low mean torque. A possible solution is to change the structure of SRMs. This article introduces an innovative combination of the number of rotor teeth and stator teeth of a two-phase switch reluctance motor (TPSRM) with eight teeth for the stator and fourteen teeth for the rotor. As a result of its unique design, which has a short path for passing the main flux, it requires less magnetomotive force. This leads to less core and copper loss, resulting in increased efficiency. Each tooth of the stator in a phase develops a positive torque during the rotation of the rotor, which increases the torque and consequently increases the mean torque of the proposed TPSRM. A current hysteresis control (CHC) is simulated by 2D FEM for the proposed 8/14 TPSRM and the conventional 8/12 TPSRM under the same mechanical load on the shaft to get a current hysteresis reference of 15A at the nominal speed of 600 rpm. To verify the novelty and advantages of the suggested TPSRM, it is compared with the conventional 8/12 TPSRM in terms of mean and peak torque, torque density, and core and copper losses were compared. Lastly, the proposed 8/14 TPSRM is shown to have better performance than the conventional 8/12 TPSRM.