Power conversion apparatus

The application relates to a power conversion device that can satisfy a requirement of reducing loss of power in a prior art. A controller 7 switches at least one of a first switching element S5 and a fourth switching element S8 from OFF to ON at a first ON time point Ton1 in a first period in which the voltage of a secondary winding 21 (transformer voltage V1) is positive, switches at least one of a second switching element S6 and a third switching element S7 from OFF to ON at a second ON time point Ton2 in a second period which is subsequent to the first period and in which the voltage of the secondary winding 21 is negative, and controls the amplitude of at least one of an output voltage Vo and output current io by shifting at least one of the first ON time point Ton1 and the second ON time point Ton2. 本申请涉及种电力转换装置。在现有技术中期望降低电力损失。控制部(7)为，使第开关元件(S5)和第四开关元件(S8)中的至少方，在二次绕组(21)的电压(变压器电压(V1))为正的第期间中的第导通时刻(Ton1)，从截止切换为导通，使第二开关元件(S6)和第三开关元件(S7)中的至少方，在接着第期间的、二次绕组(21)的电压为负的第二期间中的第二导通时刻(Ton2)，从截止切换为导通，使第导通时刻(Ton1)或者