One "Tiny Cooling Fan" major element relative to the computer is indispensable, cooling fan works by energy conversion to be achieved, namely: energy → electromagnetic energy → mechanical energy → kinetic energy. The circuit is generally divided into a variety of forms, different uses of the circuit, there will be differences in performance fan. "Tiny Cooling Fan" is the principle of electromagnetic induction, using a Hall sensor component as a synchronous detection device, controls a group of circuits, switching winding are energized sequentially to produce a rotating magnetic field, for electronic commutation of electro mechanical integration of new fans. With a wide speed range, controll ability, light reliability, quality, environmentally friendly energy, environment and economy withstand all have obvious advantages in areas that require high performance and gradually replace other types of motors, dominant, "Tiny Cooling Fan" is mainly reflected in: long life, high reliability; performance, smooth operation; intelligence, mechatronics, easy to control; small size, low power consumption; low noise, no electromagnetic interference.