IEEJ Transactions on Industry Applications
Online ISSN : 1348-8163
Print ISSN : 0913-6339
ISSN-L : 0913-6339
Extended Operating Range and High Efficiency Adjustable Speed Control of IPMSM with Variable PM Armature Flux Linkage
Lei MaMasayuki SanadaShigeo MorimotoYoji Takeda
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2000 Volume 120 Issue 8-9 Pages 1031-1036

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Abstract
An interior permanent magnet synchronous motor (IPMSM) with variable permanent magnet flux linkage is introduced in this paper. By adapting movable flux-shortening iron pieces in the flux barriers of the rotor, it is possible to decrease the permanent magnet flux linkage to some extent. In the flux-weakening control region, _??_he required d-axis current to weaken the armature flux linkage becomes smaller due to the decrease of the permanent magnet flux linkage. The constant output power operating range of the proposed IPMSM thus can be extended compared to the conventional IPMSM under the same limitation of the supply ability of the inverter. The becoming smaller d-axis also contributes to the improvement of the efficiency as well as the power factor characteristics especially at light load, high speed operation. By choosing suitable inserting scheme of the movable iron pieces, it is possible to realize optimal operating performance for the proposed IPMSM. The advantages of the IPMSM proposed in this paper are simulated and are verified with experiments.
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© The Institute of Electrical Engineers of Japan
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