| 摘要 |
PURPOSE:To reduce the power consumption when an electric fan is stopped, and enable the use of the single fan without changing parts in a country or area where the voltage of the power source is different. CONSTITUTION:The power consumption is reduced by connecting an auxiliary power source part 4 so that the current flowing in a resistor 1 for limiting the current may be bypassed to suppress the positive half-wave current flowing when the operation of an electric fan is stopped. The automatic switching operation can be realized even when the fan is used in the area where the specifications of the voltage are different by providing a voltage comparing part, driving the auxiliary power source part 4 when the detected voltage of this voltage comparing part is below the reference voltage, and keeping the motor voltage at the constant value. |
