H - Electricity – 02 – K
Patent
H - Electricity
02
K
26/113, 310/70,
H02K 15/00 (2006.01) H02K 1/02 (2006.01) H02K 1/06 (2006.01) H02K 21/02 (2006.01) H02K 21/14 (2006.01) H02K 23/04 (2006.01)
Patent
CA 1186361
ABSTRACT OF THE DISCLOSURE An electrical permanent magnet motor gener- ator designed to operate at or near the point of theo- retical maximum energy/product of the permanent magnet without causing irreversible demagnetization thereof. The operating point is created by enlarging the gap between the permanent magnet and core relative to the length of the permanent magnet, and results in maximizing the energy density of the magnet. Moreover output power and power conversion efficiency are maximized by filling the gap substantially entirely with winding, thereby minimizing ohmic heat generation with respect to power output and also minimizing winding-induced and temperature sensitive demagnetizing effects while promoting linear speed-torque characteristics. In high-speed, high-frequency applica- tions, the invention further renders low loss core mate- rials, such as magnetically soft ferrite, compatible with permanent magnets having remanent flux densities higher than the saturation flux density of the ferrite core material, so as to further maximize output power and power conversion efficiency while minimizing thermal effects.
422140
Oyen Wiggs Green & Mutala Llp
Synetron Corporation
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