Abstract
This paper presents a design approach for interior permanent-magnet (IPM) machines with variable-flux characteristics using low-coercive-force magnets for improved efficiency and extended operating speed range. A flux-intensifying IPM type with Ld > Lq is used in the design due to positive Id operation and reduced loaded Iq effects. Design considerations of machine structures and variable-flux machine attributes are discussed. In addition, leakage flux in a rotor is particularly designed to also obtain another flux-varying capability. Evaluation of the designed machine is provided by finite-element analysis simulations and experiments on a proof-of-principle machine. The designed machine shows benefits in increasing efficiency and speed range in a low-torque region when variable magnetization control of the low-coercive-force magnets or the design of the leakage flux proposed in this paper is implemented.
| Original language | English |
|---|---|
| Article number | 6560407 |
| Pages (from-to) | 1015-1024 |
| Number of pages | 10 |
| Journal | IEEE Transactions on Industry Applications |
| Volume | 50 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2014 |
Keywords
- Flux intensifying
- interior permanent magnet (IPM)
- low-coercive-force magnet
- machine design
- variable-flux linkage
ASJC Scopus subject areas
- Control and Systems Engineering
- Industrial and Manufacturing Engineering
- Electrical and Electronic Engineering