"Cooling Fan Manufacturer" in today's new attention to social development, environment protection and energy, how at the lowest cost, lowest power consumption, it is best to complete the task of cooling the engine cooling system, "Cooling Fan Manufacturer" control technology worthy of further research and analysis . Car engine at high temperature working environment must be moderate heat, to keep it at the proper temperature to work in order to meet the requirements of the engine in good working performance, durability and emissions. "Cooling Fan Manufacturer" working principle is based on the energy conversion to achieve, namely: energy electromagnetic energy → → → kinetic energy to mechanical energy. The circuit principle is generally divided into a variety of forms, using different circuits, there will be differences in the performance of the fan.