Digital high frequency resonant soft switch converter device

The utility model discloses a digital high frequency resonant soft switch converter device. The low voltage end of a main circuit module is connected to a storage battery and a low voltage sampling circuit. The high voltage end of the main circuit module is connected to a direct current main trunk circuit and a high voltage sampling circuit. The output ends of the low voltage sampling circuit and the high voltage sampling circuit are connected to the input end of a main control module. The output end of the main control module is connected to the control end of the main circuit module. The main circuit module comprises switch tubes K1, K2, K3 and K4, an auxiliary inductor La, reverse blocking diodes D1 and D2 and fly-wheel diode D3 and D4. Current enters into the auxiliary inductor through the auxiliary switch tube K3 in a step-down mode, and the current enters into the auxiliary inductor through the auxiliary switch tube K4 in a boost mode. According to the change of a load, the switching times of the auxiliary switch tube K3 and the auxiliary switch tube K4 are controlled in real time to control the energy stored by the auxiliary inductor. In a light load, the ZVS can be realized by a main switch circuit without an auxiliary circuit.