Analytical and Experimental Verification of Novel Current Waveforms for Noise Reduction in Switched Reluctance Motor

Acoustic noise reduction is one of the main topics of switched reluctance motor developments. One of the effective methods is flattening three-phase radial force sum. Flattening radial force sum is achieved by optimizing the current profile. Novel current waveforms have been proposed recently for acoustic noise reduction without sacrificing the efficiency in the 18/21 switched reluctance motor which has competitive power density, torque density, peak efficiency, and outer dimensions compared with the permanent magnet motor employed in hybrid electric vehicles. In this paper, electro-mechanical analysis, acoustic analysis, and the experiments are carried out to verify acoustic noise reduction in the 18/12 switched reluctance motor using novel current waveforms.