Direct current converter and passive control method thereof

The invention provides a direct-current converter and a passive control method thereof. The method comprises the following steps: acquiring an actual input voltage value and an actual output voltage value of the direct-current converter; obtaining an inductive current reference value of the DC converter based on the actual output voltage value and a given output voltage reference value; based on the actual input voltage value, the input voltage reference value, the inductive current reference value and preset injection damping, obtaining an output voltage value of the DC converter after the preset injection damping is injected; obtaining a control cost function of the DC converter based on the output voltage value and the inductive current reference value; minimizing the control cost function to obtain a switch control signal of the DC converter; and controlling a switch tube in the DC converter based on the switch control signal. 本公开提供一种直流变换器及其无源控制方法，方法包括：获取所述直流变换器的实际输入电压值和实际输出电压值；基于所述实际输出电压值和给定的输出电压参考值，得到所述