PWM Influence on the Iron Losses and Characteristics of a Slotless Permanent-Magnet Motor With SiFe and NiFe Stator Cores


This paper investigates the influence of switching frequency and modulation index combined with welding on the iron losses in thin silicon–iron and nickel–iron lamination sheets of a tiny slotless permanent-magnet synchronous machine (PMSM). Initial, measurements are conducted on welded and nonwelded stator ring cores for switching frequencies between 1 and twenty kHz and modulation indexes of 0.four, 0.7, and zero.nine, keeping constant elementary flux density peak values. This is attainable by changing the dc-link voltage of the inverter. The obtained measurement data are afterward used in finite-part technique simulations to research the inverter influence on the performance of the PMSM.

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