This lesson covers the fundamental aspects of thermal equivalent circuits in electrical machines. It delves into the case study of a stator circuit, discussing related losses such as stator copper loss and stator iron losses. The lesson further elaborates on the development of the thermal equivalent circuit, considering heat flow, thermal nodes, and different types of losses. It also explains how to calculate thermal resistances and capacitances, and how to write transient thermal equations. The lesson provides a comprehensive understanding of how to analyze and design an appropriate thermal circuit, using illustrative examples and equations.

- Thermal equivalent circuits are crucial in understanding the heat flow in electrical machines.
- Stator circuits and their associated losses play a significant role in these circuits.
- Transient thermal equations help in calculating the thermal temperatures at various thermal nodes.
- The analysis and design of an appropriate thermal circuit are essential for efficient heat management in electrical machines.

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