Effect of Material Properties on Core Loss in Switched Reluctance Motor using Non-Oriented Electrical Steels

Abstract

The effort attempts to investigate the influence of various non-oriented electrical steel sheets on the core loss of a switched reluctance motor (SRM). The core loss of the motor inherits a strong correlation with flux density and permeability of the material. The study involves the use of laminated 2.7 % high silicon steel suitable for the motor in view of its higher flux density and lower core loss. The accurate prediction of core loss leaves way to suggest measures for improving the performance of the SRM. The dynamic simulation measurements of a 1.5 kW, three-phase 12/8 SRM involve the finite element method (FEM) and use the data obtained experimentally from Epstein frame. The closeness of the simulated and hardware results obtained with laminations of M400-50A, DI MAX-M19 and DI MAX-M15 both for the stator and rotor, espouse a greater significance to the findings in terms of the core loss density and forge new dimensions for its use in the drive industry.

Minimizing Mutually Coupled Switched Reluctance Machine's Stator Volume by Stator Yoke Optimization

“…The difference between the maximum and minimum instantaneous torque expressed as a percentage of average torque at steady-state operation is called torque ripple [30]. 1 (5) Torque ripple ratios of all models are calculated using Equations (4) -(5) at 5 Amps and 10 Amps. The basic model MCSRM-0 has a value of T avg = 1,13 Nm at 10 Amps.…”

“…For the calculation of torque ripple, the instantaneous torque and average torque are determined. The obtained values at 10 Amps are replaced in (5). As a result, the torque ripple of the basic model MCSRM-0 is 46.2%.…”

“…SRMs consist of a stator with windings and a rotor with saliency. They have no winding or permanent magnet on rotor [4][5]. Since SRMs do not need PM, they have low cost and work even in high temperature conditions created by internalcombustion engines [6].…”

Dynamic circuit model considering core losses and phase interaction for switched reluctance machines

“…For the EEC model of energy storage, the flux linkage is derived from the MEC and the inductance is calculated by (16). Based on the above analysis, an electric circuit including both core losses and energy storage is obtained, as shown in Fig.…”

“…In [12], an equivalent resistance method is added into the model to represent the core losses, including the hysteresis loss and eddy current loss, but the model of the eddy current loss is very complex for computation. In [13][14][15][16], the calculation results are average core losses which cannot reflect the dynamic losses and efficiency during the operation. A fast method to calculate the core losses is presented in [17], but the method is based on the static finite element model.…”