| 摘要 |
An inductance contactless starter for a single-phase AC motor includes a current inductor and a triac, meanwhile one terminal of the secondary coil of the inductor is connected to the gate electrode of the triac, and the other terminal is both connected to the first electrode of the triac and the terminal of the auxiliary winding of the motor. The two terminals of the primary coil of the inductor are connected to the motor and the power supply. Through the employment of current signal relating to the sampling of the current inductor, the present invention could effectively control the heat loss of the current sampling system, whose power loss may be as low as milliwatt level, this "zero power loss" singlephase AC motor starter, so that the energy saving efficiency is improved significantly. Meanwhile, the circuit is simple, and the quantity of the components is few and reliable, so that the reliability of the motor starting system is improved while the starting function of the motor is maintained. |
