Single-phase switched reluctance motor design

The evolution or a novel form of single-phase switched reludancc motor, suitable for example for high-spwd Tans is described. Thc nio&or has four shtor and Iʹour rotoy poles, but only two coils. The new motor is dciivcd by simple :indysis from the basic 2-pole nxtcliinc using sweeping assumptions. It is predicted to havc only half the core lciigtli, less copper loss, but significantly more iron loss than lhc 2pole form. Thcsc conclusions fire tcslcd using coinputer-based ilnalysis, arid lest results from a prolotype motor arc pirsented which con fiiin the attractiveness of the dcsign. Attention then turns 10 the starting problcm of all aich tnachincs, arid a method using perinaiicnt magnets is shown to bc patʹticulerly appropriate for the new molor. Tlic operation of this method is analysed, and simulated sparling responses arc comparcd with experinieiital rcsul~s.