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Variable reluctance motor is becoming a competitive candidate among all other machines available due to its added features. The development of variable reluctance motor is simple due to the simple construction of rotor without any permanent magnets. Reduced complexity in structure paves the way for low-cost motor and it also leads to the application of SRM in a wide manner. In order that the machine could be used in various applications, it is much necessary to have a suitable driving system (converter configuration). The best choice of converter for SRM would pave the way for desirable control of the machine. The proposed work includes the design and analyses of an appropriate driver configuration for SRM and interface it with the motor which is already designed and analyzed using ANSYS Maxwell. The design and analysis of the converter are carried out using the ANSYS Simplorer tool box. [ABSTRACT FROM AUTHOR]

This paper presents four-quadrant sensorless control in switched reluctance machine (SRM) over the wide speed range. The proposed sensorless control technique could be employed not only at low speed with current chopping control (CCC) but also at high speed with angle position control (APC). At startup and low speed, the narrow voltage pulse is injected into the idle phases and the rotor position zone is determined by comparing the measured flux linkage with four flux linkage-current curves. The same flux linkage-current curves also can be adopted for rotor positions estimation at medium and high speeds. Two flux linkage-current characteristic curves in the inductance rising zone are employed to estimate the rotor position for motoring mode and the other two curves in the inductance falling zone are used to estimate the rotor position for braking mode. The experiments on a three-phase 12/8 pole SRM drive platform are carried out to verify the effectiveness of the proposed sensorless control technique. [ABSTRACT FROM AUTHOR]

Here we present a comprehensive analysis of structural performance of Induction Machine (IM) and Switched Reluctance Machine (SRM) rotors under different operational conditions. Electric machines are susceptible to forces of diverse origins. In addition to traditionally considered magnetic and centrifugal forces, this article discusses independent and inclusive effects of thermal expansion and shaft attachment techniques on structural integrity of the machines. A comparative analysis of structural performance of IMs and SRMs has also been performed, under a range of scenarios, to facilitate application-specific machine selection from a structural perspective. [ABSTRACT FROM AUTHOR]

Double-rotor switched reluctance machine (DRSRM) integrates two switched reluctance machines (SRMs) into one housing, providing a compact solution for hybrid power trains so that one DRSRM can replace two electric machines. This paper presents a new DRSRM design in which the stator flux barriers are removed and the flux lines in the interior and exterior machines are more evenly distributed. The effects of stator flux barriers are investigated, the loss mechanism in the DRSRM is analyzed, and finally, various winding configurations are compared. It is concluded that flux lines are more evenly distributed in the stator, reducing iron saturation and losses, while the interior and exterior machines can be independently controlled without sacrificing performance. Moreover, winding polarity in DRSRM is critical to reduce stator iron saturation and thereby losses. [ABSTRACT FROM PUBLISHER]

The single-phase switched reluctance machine has a simple and robust construction and is suitable for high-speed operation. Torque production is a function of the difference between the aligned and unaligned inductance, and increasing this difference theoretically will increase the torque. In this article, conducting screens are incorporated into the rotor of a prototype 2/2 single-phase switched reluctance motor. The effect of the conducting screens on current response, flux linkage, and output torque is evaluated using finite element analysis and validated experimentally. At fixed current conduction angles, conducting screens improve the rate of change of inductance at low speed, and enhance performance at high speed when the machine operates in the single voltage pulse mode. The conducting screens have a negative effect on the output torque when using optimal commutation angles. Reasons for this phenomenon are given. [ABSTRACT FROM AUTHOR]