Abstract
The effect of rotor pole-shoe construction on the electromagnetic losses of a 12.5-MW frequency-converter-fed wound-field synchronous motor is studied by numerical simulations. The simulations are done with the finite-element method including a dynamic model for the eddy-current, hysteresis, and excess losses in the core laminations. In the machine under examination, a reduction of 6.8% in the rated-load total electromagnetic losses was achieved merely by modifying the rotor pole-shoe shape and the damper-winding slots. Furthermore, a 15.4% reduction was achieved by removing the damper winding and changing the rotor lamination material to a 0.5-mm Fe-Si sheet instead of the original 2-mm steel sheet. Calorimetric measurements with a 150-kVA generator confirm the significant effect of the rotor lamination material under frequency-converter supply.
Original language | English |
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Pages (from-to) | 208-217 |
Number of pages | 10 |
Journal | IEEE Transactions on Industry Applications |
Volume | 50 |
Issue number | 1 |
DOIs | |
Publication status | Published - Jan 2014 |
Publication type | A1 Journal article-refereed |
Keywords
- Finite-element (FE) methods
- loss measurement
- magnetic losses
- synchronous motors
- variable-speed drives (VSDs)
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Control and Systems Engineering
- Industrial and Manufacturing Engineering