Dual-rotor, radial-flux, toroidally wound, permanent-magnet machines

作者：Qu RH^*; Lipo TA

来源：IEEE Transactions on Industry Applications, 2003, 39(6): 1665-1673.

DOI：10.1109/TIA.2003.818968

• cogging torque
• electrical machine optimization
• permanent-magnet (PM) machine design
• radial-flux
• toroidally wound
• permanent-magnet (RFTPM) machines
• toroidal windings

A novel machine family-dual-rotor, radial-flux, toroidally wound, permanent-magnet (RFTPM) machines-is proposed in order to substantially improve machine torque density and efficiency. After the principles of operation, configurations, and features are discussed, the machine design and optimization guidelines are given. A prototype has been designed, built, and tested. The measured torque density of the prototype, which well matches the design value, is almost three times of that of the induction machine with the same power of 3 hp and speed. Meanwhile the efficiency is still kept high and the material cost is kept low by using ferrite magnets. Three novel approaches are proposed to reduce the cogging torque in the RFTPM machines, whose validity is verified by finite-element analysis results and experimental measurements.

• 出版日期2003-12