Abstract
Brushless doubly-fed induction machines (DFIMs) can be potential variable-speed generators for off-shore wind turbine applications. This special machine has two stator
windings with different pole-pairs. There is no direct magnetic coupling between two stator windings. A unique nested-loop rotor is designed to couple both stator windings. However, it results in lots of undesired space-harmonics in the airgap fields compared to conventional induction machines. There are few papers working on the design of nested-loop rotors. To design a better rotor, it is important to understand the complicated magnetic coupling in brushless DFIMs. This paper analyzes the space-harmonics and time-harmonics to provide a better understanding of the magnetic cross-coupling through the nested-loop rotor. The harmonic analysis is validated by FEM simulation and by taking measurements on a prototype in simple induction operation mode.
windings with different pole-pairs. There is no direct magnetic coupling between two stator windings. A unique nested-loop rotor is designed to couple both stator windings. However, it results in lots of undesired space-harmonics in the airgap fields compared to conventional induction machines. There are few papers working on the design of nested-loop rotors. To design a better rotor, it is important to understand the complicated magnetic coupling in brushless DFIMs. This paper analyzes the space-harmonics and time-harmonics to provide a better understanding of the magnetic cross-coupling through the nested-loop rotor. The harmonic analysis is validated by FEM simulation and by taking measurements on a prototype in simple induction operation mode.
| Original language | English |
|---|---|
| Title of host publication | Proceedings - 2016 International Conference on Electrical Machines |
| Place of Publication | Piscataway, NJ |
| Publisher | IEEE |
| Pages | 371-377 |
| Number of pages | 7 |
| ISBN (Electronic) | 978-1-5090-2538-1 |
| ISBN (Print) | 978-1-2090-2539-8 |
| DOIs | |
| Publication status | Published - 2016 |
| Event | 2016 XXII International Conference on Electrical Machines (ICEM) - Lausanne, Switzerland Duration: 4 Sept 2016 → 7 Sept 2016 |
Conference
| Conference | 2016 XXII International Conference on Electrical Machines (ICEM) |
|---|---|
| Country/Territory | Switzerland |
| City | Lausanne |
| Period | 4/09/16 → 7/09/16 |
Keywords
- brushless
- cross-coupling
- doubly-fed
- induction machine
- nested-loop
- space-harmonics
- simple induction mode
- time-harmonics