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Recently, stator dc current excited vernier reluctance machines (dc-VRMs) which have concentrated field and armature windings in stator, are gaining more and more research interest due to their features of robustness rotor structure, low cost, and easy heat dissipation. This paper proposes a novel field winding connection for dc-VRMs. Taking the stator/rotor slots of 12/10 machine as an example, the...
This paper mainly focuses on the analysis of the eddy current loss in permanent magnet (PM) of the surface-mounted PM vernier machine (SPMVM). The eddy current losses under open-circuit, armature reaction and load conditions are detailed investigated by the analytical method and finite-element analysis (FEA). The influence of the pole ratio, which is defined as the ratio of the rotor PM pole-pairs...
This paper compares the electromagnetic performance of stator DC current excited vernier reluctance machines (DC-VRMs) with different Field winding configurations. Using the theoretical analysis and finite element analysis (FEA), the back-EMF, and torque capability, etc. are compared. The results show that the field winding arrangement has a great and various effect on the machine torque capability,...
In interior permanent magnet (IPM) machines, dq-axis coordinate system is usually employed to analysis the machine. In commonly, the d-axis is coincided with the axis of pole. However, dq-axis armature reaction will not only affect the amplitude of the PM flux linkage, but also make dq-axis offset from the position under no load condition. These will lead errors for the traditional dq-axis coordinate...
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