This paper presents a magneto-thermal model of a high-speed claw pole motor. Three-dimensional finite element analysis is used for core loss calculation and temperature distribution because flux path in claw pole motor is pure three-dimension. The total core loss is computed by separating the alternating and rotational hysteresis, eddy current and anomalous losses in each element. The element's core loss is coupled into elements in thermal analysis by keeping the same mesh structure between magnetic and thermal analysis. Other losses such as air friction loss, rotor loss are included in the model due to high speed. This model is applied to a 2kW, 30krpm three stack claw pole motor with soft magnetic composite core, and the results are compared and discussed finally.
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