Motor-CAD is the most advanced motor design software designed specifically to simplify the complexity of thermal analysis. The thermal models of Motor-CAD are based on lumped-circuit analysis providing instantaneous results. Both permanent and transient thermal behaviour (duty-cycle) can be analysed. Valuable graphical feedback (geometry, schematic diagram, graphs, etc…), associated with various sophisticated cooling methods (spiral grooves, liquid cooling, through ventilation, etc...) makes Motor-CAD a comprehensive and powerful analysis tool of the thermal behaviour of motors and helps to speed up size reduction processes