MotorCAD LAB Module for thermal envelop

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Hi
I had a problem when running the LAB Module thermal analysis on the full torque-speed envelop of the motor. The thermal circuit was modified as the flow direction in the stator channel is from the middle to the end and the front (bidirectional). Then, when I run the thermal analysis in the LAB Module, it's always unconverged (or iteration is larger than 200). Could you give me some advice on it?
Thank you very much.

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