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Multiphase machines have higher reliability than 3-phase machines. In order to produce smooth torque after one or more phases are open circuit, the stator magnetic motive force (MMF) is kept unchanged. This paper presents fault-tolerant current control strategies of a concentrated winding multiphase machine under open-circuited fault conditions. In a concentrated winding multiphase machine, other...
We investigated the effects of armature reaction on the performance of a three-phase three-stack claw pole motor with soft magnetic composite stator core by using three-dimensional finite-element analysis (FEA), which is an effective approach to accurately compute the parameters and performance such as the back electromotive force (EMF), core losses, and winding inductance at various saturation levels...
This paper presents aspects of the design solution for a high speed, high efficiency permanent magnet machine used as a motor/generator (M/G) unit in a flywheel energy storage system. The motor is operated in a vacuum with passive cooling; thus the right choice of permanent magnet properties and ability to withstand demagnetization due to the temperature variation and armature reaction is important...
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