High-Frequency Characterization of Losses in Fully Assembled Stators of Slotless PM Motors
| Autor: | Oskar Wallmark, Juliette Soulard, Jonas Millinger |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Electric motor
Materials science Stator Permanent magnet machines 020209 energy 020208 electrical & electronic engineering Energy Engineering 02 engineering and technology wide band gap semiconductors Gauge (firearms) Industrial and Manufacturing Engineering Automotive engineering law.invention Energiteknik Lamination (geology) Control and Systems Engineering law harmonic analysis 0202 electrical engineering electronic engineering information engineering Power semiconductor device Skin effect magnetic losses Electrical and Electronic Engineering Reduction (mathematics) DC bias |
| Zdroj: | IEEE Transactions on Industry Applications. 54:2265-2275 |
| ISSN: | 1939-9367 0093-9994 |
| DOI: | 10.1109/tia.2018.2806883 |
| Popis: | —The recent emerge of wide band-gap (WBG) powertransistors enables higher switching frequencies in electricalmotor drives. Their full utilization from a system point ofview requires quantification of the corresponding time-harmonicmotor losses. As an initial step, this paper presents a uniquestudy of stator losses for three different commercially availablenon-oriented silicon-iron (SiFe) steel grades (with laminationthicknesses 0.1, 0.2 and 0.3 mm). The investigations cover awide frequency range (10-100 kHz) at different levels of DC-bias(up to 1.6 T). Iron losses are identified from measurements onfully assembled stators, deploying a novel technique. By utilizingfully assembled stators, no additional samples are required.Manufacturing influence is inherently incorporated. Results showthat measured iron losses are twice as high at 10 kHz comparedto Epstein test results, which emphasizes the need to incorporatemanufacturing influence on iron losses at high frequencies. Thelevel of DC-bias is also observed to have a significant impacton iron losses (up to 30 %). Even though thinner laminationsare known for reducing iron losses, the reduction is much lowerthan anticipated in the studied frequency range due to skin effect.Using 0.1 mm lamination gauge instead of 0.3 mm reduces lossesby 50 % at 10 kHz, while the same substitution at 100 kHz onlyreduces losses by 30 %. Future work includes loss separation incomplete converter-fed machines. QC 20180201 |
| Databáze: | OpenAIRE |
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