Abstract
The paper proposes a method of eddy current analysis which can accurately calculate characteristics of electrical machines including several moving conductors at different velocities. In the formulation of the presented method, different moving coordinate systems are used separately in each conductor region for the purpose of setting relative velocities to be zero between every conductor and the coordinate system. The method can avoid numerical disadvantages of fixed coordinate system which has relative velocity to the conductors.
Firstly, the paper discuses the difference of definitions between electromagnetic potentials introduced in moving coordinate system and potentials introduced in fixed coordinate system in order to reveal theoretical background of the proposed method. Potentials introduced in each coordinate system can be same value introducing appropriate gauge conditions. Secondarily, it shows results of numerical tests which clarify the consideration. Finally advantages of the proposed method are discussed through the practical analysis of a canned motor.
