JMAG-Designer is a simulation software for electromechanical design striving to be easy to use while providing versatility to support users from conceptual design to comprehensive analyses. Eddy Current Loss Density Distribution of the Gear Fig. 1 shows the eddy current loss density distribution of the surface of the gear and the cross-section of a tooth top. Each cross-section shown in the figure is the XY-plane at the midway position of the tooth width. The magnetic field generated by the coil produces eddy currents on the gear tooth surface. This eddy currents are distributed on the surface of the gear due to the skin effect. In addition, it is apparent that eddy current loss distribution produced on the surface of the gear varies with the coil geometry. · Temperature Distribution and Variation of the Gear Fig. 2 shows the temperature distribution of the gear, and fig. 3 shows the temperature variation versus time of the tooth tops. Fig. 3 shows the temperature variation of the tooth top at the measuring points shown in fig. 2. From the temperature distribution, it is apparent that the eddy currents generate heat in the tooth top. From the difference in temperature distribution between model A and model B, it is apparent that the heat generation changes depending on the coil geometry. The difference in heat generation from the coil geometry can also be verified in fig. 3. In addition, when the temperature exceeds the Curie point of 770 deg C, the temperature rises differently for both Model A and Model B. · Maximum Achieving Temperature Distribution Fig. 4 shows the maximum temperature that each part reaches. This figure is a two color contour plot, where the parts exceeding 720 deg C are shown in red, and those below 720 deg C are shown in purple.