Abstract
Taking a 117kW 60000 r/min super high speed permanent magnet generator as an example, the mathematical model for 2D transient electromagnetic field analysis was established, and then magnetic flux lines and air-gap flux density were analyzed by using circuit-field coupled time-stepping finite-element method. The variations of terminal voltage and windings current with time were obtained, which are compared with the test data. With CFD principles and heat transfer theories, the temperature distributions of generator and cooling medium were calculated by using the 3D finite volume method. Then, the eddy current loss distributions in generator rotors with protection components composed of alloy sleeve, copper layer, carbon fiber composite materials, and ceramics were analyzed, and the influences of the conductivity of carbon fiber composite materials and the thickness of copper shield layer on eddy current loss were given. From the comparisons of components temperatures in generator with different rotor sleeves, the effects of sleeve materials and structures on machine temperature distributions were obtained. The obtained conclusion provides certain guidance for the designing of super high speed PM machine.
| Original language | English |
|---|---|
| Pages (from-to) | 85-92 |
| Number of pages | 8 |
| Journal | Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering |
| Volume | 31 |
| Issue number | 30 |
| Publication status | Published - 25 Oct 2011 |
| Externally published | Yes |
Keywords
- Carbon fiber composite
- Ceramic
- Eddy current loss
- Super high speed permanent magnet generator
ASJC Scopus subject areas
- Electrical and Electronic Engineering