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Firing angle adjustment for switched reluctance motor efficiency increasing based on measured and simulated data

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Abstract

This paper presents a simple turn-on and turn-off angles adjustment method to increase the efficiency of small-size switched reluctance motor (SRM) in wide speed and torque range. The simplicity of the control algorithms allows building a variable speed drive without a high-performance microcontroller and FPGA or ASIC. The firing angles calculation uses a second-order polynomial and look-up table. An increase in efficiency is demonstrated on the finite element analysis (FEA) model of SRM which was verified against measurement on an experimental test bench. Measured efficiency maps have a flat top for the investigated motor. Therefore, the angle jittering due to limited position sensor precision and 50 µs processor cycle time have a small impact on motor efficiency. The evaluation of the angle adjustment method and comparison with measurements identifies which part of the FEA model is crucial for the one-to-one implementation of the angle adjustment formulas obtained from simulation to the motor control algorithm.

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Acknowledgements

This work was supported by the Slovak Research and Development Agency under contract No. APVV-18-0436 and APVV-15-0750.

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  1. Faculty of Electrical Engineering and Informatics, Technical University of Košice, Košice, Slovakia

    Peter Bober & Želmíra Ferková

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  1. Peter Bober
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Correspondence to Želmíra Ferková.

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Bober, P., Ferková, Ž. Firing angle adjustment for switched reluctance motor efficiency increasing based on measured and simulated data. Electr Eng 104, 191–202 (2022). https://doi.org/10.1007/s00202-021-01346-x

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