The effects of magnetic circuit geometry on torque generation of switched reluctance motor with higher number of rotor poles are investigated in this paper. Specifically, the torque generation of novel switched reluctance machine with 8 stator and 14 rotor poles (SRM 8/14) is explored. A few suggested values of design ratios are derived for this novel SRM. The machine characteristics are computed using two-dimensional finite element method (2-D FEM).

Two methods of the multi-objective design optimization of switched reluctance motor with 8 stator and 14 rotor poles (SRM 8/14) are compared in this paper. The first optimization method is based on using the results of Two-Dimensional Finite Element Method (2D FEM) parametric analysis of SRM 8/14. Augmented Lagrangian Genetic Algorithm (ALGA) and 2D FEM are coupled in the second optimization process. The optimization objectives are to minimize torque ripple and maximize average steady-state torque, torque factor, torque quality factor, torque density and losses factor. The optimization variables are the stator and rotor poles arc angles, the taper angles of the stator and rotor poles, stator yoke radius, rotor yoke radius, and stator coil height.

Analysis and static characteristics optimization of the new four-phase switched reluctance machine with 8 stator and 14 rotor poles (SRM 8/14) is presented in this paper. This new configuration with higher number of rotor poles is considered to be suitable for high performance electric vehicle (EV) drives. Optimization variables were the stator and rotor poles arc angles, and the taper angle of the stator poles. The optimization objectives were to minimize torque ripple and maximize torque factor, torque quality factor, torque density and losses factor. Calculation of the static characteristics and optimization is performed by a combination of high-level technical computing language Matlab and 2D FEM software Ansoft Maxwell. The genetic algorithm (GA) is used for minimizing a weighted sum of five normalized objectives.

In this paper a comparative evaluation of three, four-phase, switched reluctance machines (SRMs) is presented. Configurations 8/6 and 8/10 are conventional SRMs with standard relationship between number of stator and rotor poles. Configuration 8/14 has number of rotor poles calculated according to the new pole design formula introduced recently. Design considerations for novel SRM 8/14 are given. Static characteristics of SRM 8/6, SRM 8/10 and SRM 8/14 are investigated using finite element analysis (FEA). Comparison of these characteristics is given regarding several criterions for torque profiles evaluation and torque density assessment.

This paper presents a procedure for optimization of the switched reluctance drive, in order to achieve required torque-speed characteristics. SRM configuration and characteristics are given, and experimental verification of the modeled characteristic is presented. Genetic algorithm (GA) was used for optimization of turn-on angle, turn-off angle and voltage, which represent basic control inputs. The achieved results suggest that the machine's geometry should be optimized as well.

Magnetic circuit design of wound rotor low-voltage three-phase synchronous generator for autonomous operation is presented in this paper. The Maxwell software based on two-dimensional finite element method (2D FEM) is used to study the performance of the synchronous generator in specified static operating regime. Two machines with different configurations are analyzed. These machines are characterized by the same stator and rotor external dimensions and used materials. Moreover, stators of all machines are exactly the same while the rotor magnetic circuit structures and excitation windings are different. Calculated characteristics and their comparisons are presented and discussed. Some characteristics of prototype, which is currently under construction, are given.

In this paper the static (flux linkage and torque) and steady state characteristics (speed, current and torque) of the switched reluctance motor (SRM) is investigated for four magnetic structures with various combinations of stator and rotor poles: 8/6 (basic configuration), 16/12 (`double poles' configuration), 16/14 and 16/18 (`toothed poles' configurations). The static characteristics are calculated for different rotor positions and excitation currents using numerical finite element method (FEM) for magnetostatic field analysis. Dynamic characteristics are calculated using specially developed software routines in package Matlab/Simulink. The purpose of this paper is to show the effects of the magnetic circuit structures on static and steady state characteristics of the SRM. Validation of the computational methods was carried out by comparing the calculated static and steady state characteristics with the ones measured on 8/6 SRM prototype.

This paper presents a procedure of determination of static characteristics of switched reluctance machines (SRMs). Calculations are realized for two SRM topologies including novel configuration with 8 stator and 14 rotor poles (SRM 8/14). This configuration is based on new pole design formula introduced recently. Flux linkage and static torque characteristics are calculated for different rotor positions and stator currents using two-dimensional finite element analysis (2D-FEA). Simulation results for new SRM 8/14 and conventional SRM 8/6 with the same number of phases and outer dimensions are presented and compared. This comparison shows that new configuration can have better torque density. Therefore, new design approach should be considered to make this type of machines a more attractive for high performance HEV's (Hybrid Electric Vehicle's) drives.