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Operating Switched Reluctance Motor in Proper Excitation Angles

Switched reluctance motor (SRM) has been an alternative solution for electric drives due to its advantages. Applications in hybrid and electric vehicles need high torque with low ripple. Operation in motoring mode requires phase current flows during positive slope of phase inductance, this can be implemented by current control or single pulse control. In certain range of its speed, single pulse control is more suitable. By selecting the proper excitation angles, higher torque can be produced. In this paper, excitation with different turn-on angles for single pulse control is analyzed. This is addressed to obtain higher torque. To verify the analysis, experimental works were done. To generate any excitation angles, digital signal controller was implemented as the core of the control strategy. By shifting the turn-on angle just before the point where the phase inductance starts to rise, higher torque can be produced. For 8/6 SRM, turn-on angle 28° can be selected.