Capacitance as "Mini Air Cooling Fan" an important part, may reflect the merits of the motor from the side, the home fans in general the smaller the capacitance value, indicating that the motor starting current is smaller, more energy-efficient, "Mini Air Cooling Fan" more stable relative performance of the motor ; another larger the value of the rated voltage, capacitance-voltage shock resistance stronger, motor performance will be relatively more stable. The main component is a fan of: AC motor. Its working principle is: energized coil in a magnetic field by the force of the rotation. Form of energy is transformed: "Mini Air Cooling Fan" the main electrical energy into mechanical energy, and because the coil has a resistance, so that there is an inevitable part of the electrical energy to be converted into heat.