Abstract:In this paper, a design scheme of mobile melting ice device is proposed in this paper aiming at the shortcoming of ice-melting method, which is widely used, such as dc melting ice and artificial ice, which can not be used in the non-loss condition. The design is based on high voltage thyristor three-phase fully-controlled bridge rectifier circuit as the main circuit of the rectifier, using a variety of over-voltage protection measures for the effective protection of the power unit, by optimizing the control system design makes the device output current continuously adjustable, which based on the reliability of the device working to achieve stable output meet the design on the melting ice of current. The simulation and test show that the device can output the current of the melting ice of the line continuously and reliably in the design working condition.