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 erit dimisit a prima coolant calidum auferat. : II, quod primaria refrigerationem medium temperatus est inferior quam pars de Brushless DC calces motor controller of Gas aut liquid medium, Brushless DC calces motricium et controller ex parte in contactu et dat calefacere. III, circa refrigerationem Medium: Brushless DC calces motor moderatoris ambiente Gas aut liquidum medium. Omnibus simplex intellectus scientia de Brushless DC calces motor controller, non solum auxilium in intellectu, ita et auxilio in usu.