Brushless dc gear motor controller refers to the cooling process of energy conversion, there is always a small part of the loss into heat, it must be through the motor shell and the surrounding medium heat out ceaselessly, the heat of the process, then it will appear along with equipment cooling medium: : 1, secondary cooling medium temperature is lower than the primary cooling medium of gas or liquid medium, through the outer surface of the brushless dc gear motor controller or cooler will be released by the primary coolant heat away. : 2, Prima refrigeratio mediae temperaturae inferior est quam portio motoris scopuli motoris gasi vel liquidi mediae, Brushless dc calces motoriis et moderatoris partis in contactu, et dat calorem auferentem. 3, circa medium refrigerationem: Brushless dc phaleris motoris moderatoris ambiente gas vel medium liquidum. Omnes simplices intellectus cognitionis motoris peni- Brushless dc controller, non solum adiuvabunt ad intelligendum, ita etiam adiuvabunt in usu.