A power converter for converting the power received from a power source , and supplying the converted power to a load , comprising: a semiconductor switching element ; a control circuit configured to control the turning on and off of the semiconductor switching element by providing a control signal for turning the semiconductor switching element into an on-state or an off-state; and an LC circuit formed of an inductor (Lf) and a capacitor (Cf), the inductor (Lf) being connected between the semiconductor switching element and the load , the capacitor (Cf) being connected between the load side terminal of the inductor (Lf) and one end of the power source ; wherein the resonance cycle (T) of impedance is the resonance cycle of the LC circuit, and wherein the control signal is configured of a first on-signal (G11) and a second on-signal (G12) for turning the semiconductor switching element into an on-state, or of a first off-signal (G21) and a second off-signal (G22) for turning the semiconductor switching element into an off-state, wherein an off-state period (T11) is provided between the first on-signal (G11) and the second on-signal (G12) or an on state period (T21) is provided between the first off-signal (G21) and the second off-signal (G22) of the control signal, characterized in that the off-state period (T11) or the on-state period (T21) being a time equivalent to the period of the first on-signal (G11) or the first off-signal (G21) respectively, and the period of the first on-signal (G11) and the off-state period (T11) or the period of the first off-signal (G21) and the on-state period (T21) are set to a time one-sixth of the resonance cycle (T) of impedance. a semiconductor switching element ; a control circuit configured to control the turning on and off of the semiconductor switching element by providing a control signal for turning the semiconductor switching element into an on-state or an off-state; and an LC circuit formed of an inductor (Lf) and a capacitor (Cf), the inductor (Lf) being connected between the semiconductor switching element and the load , the capacitor (Cf) being connected between the load side terminal of the inductor (Lf) and one end of the power source ; wherein the resonance cycle (T) of impedance is the resonance cycle of the LC circuit, and wherein the control signal is configured of a first on-signal (G11) and a second on-signal (G12) for turning the semiconductor switching element into an on-state, or of a first off-signal (G21) and a second off-signal (G22) for turning the semiconductor switching element into an off-state, wherein an off-state period (T11) is provided between the first on-signal (G11) and the second on-signal (G12) or an on state period (T21) is provided between the first off-signal (G21) and the second off-signal (G22) of the control signal, characterized in that the off-state period (T11) or the on-state period (T21) being a time equivalent to the period of the first on-signal (G11) or the first off-signal (G21) respectively, and the period of the first on-signal (G11) and the off-state period (T11) or the period of the first off-signal (G21) and the on-state period (T21) are set to a time one-sixth of the resonance cycle (T) of impedance. <EOS>