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This paper proposes a novel approach for calculating position-dependent inductance matrix of slotted permanent magnet synchronous motors (PMSMs) and advanced analytical models for machine voltage and torque. In a real PM machine, the slotted structure of the stator and rotor causes unintended variations in air-gap permeance and magneto-motive force (MMF). The proposed approach analyzes the effects...
This paper presents an effective permanent-magnet vernier (PMV) machine for direct-drive applications, in which the low-speed outer rotor employs a spoke-magnet arrangement with flux focusing to improve air-gap flux density, and the stator adopts an open-slot structure to enable the stator teeth to achieve field modulation. Using the finite element analysis, the performance characteristics of the...
The doubly excited brushless reluctance machine (DEBRM) is a new type of reluctance machine and is attractive for converter-fed variable speed drive applications and variable-speed constant-frequency generating systems. The DEBRM system features not only simplicity, robustness and reliability of the reluctance or cage-rotor inductance machines, but a much smaller power electronic converter, compared...
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