High-speed synchronous reluctance machine with minimized rotor losses

Journal Article · Sat Apr 01 04:00:00 EST 2000 · IEEE Transactions on Industry Applications (Institute of Electrical and Electronics Engineers)

DOI:https://doi.org/10.1109/28.833771· OSTI ID:20082441

Hofmann, H; Sanders, S R

This paper presents a refined design of a high-speed synchronous reluctance machine with minimized eddy-current losses in the rotor. Design criteria are the ability of the rotor to withstand high speeds, ability to operate in vacuum, negligible zero-torque spinning losses, high reliability, high efficiency, and low manufacturing cost. The rotor of the synchronous reluctance machine consists of bonded sections of ferromagnetic and non-magnetic steels. Finite-element code, incorporating rotor rotation, has been developed in MATLAB that calculates steady-state eddy currents (and losses) in the rotor. A stator iron and stator winding have been designed to minimize rotor losses, and two such prototype machines have been fabricated. Experimental results show an efficiency of 91% at a 10-kW 10,000-r/min operating point, and rotor losses less than 0.5% of input power.

• Research Organization: Univ. of California, Berkeley, CA (US)
• OSTI ID: 20082441
• Journal Information: IEEE Transactions on Industry Applications (Institute of Electrical and Electronics Engineers), Journal Name: IEEE Transactions on Industry Applications (Institute of Electrical and Electronics Engineers) Journal Issue: 2 Vol. 36; ISSN 0093-9994; ISSN ITIACR
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
33 ADVANCED PROPULSION SYSTEMS
EDDY CURRENTS
ELECTRIC MOTORS
ENERGY EFFICIENCY
FINITE ELEMENT METHOD
FLYWHEEL ENERGY STORAGE
MATHEMATICAL MODELS
OPTIMIZATION
POWER LOSSES
ROTORS