Abstract: A power conversion apparatus sets a point between AC input terminals of a full-wave rectifying circuit as an input terminal of an alternating voltage, connects a series circuit of two switches between DC output terminals, connects a series circuit of a capacitor and an inductor with a midpoint of the two switches, forms a closed loop with the first switch, the capacitor and the inductor, connects a series circuit of a diode and a smoothing capacitor with the midpoint of the two switches, forms a closed loop with the first switch, the diode and the smoothing capacitor, sets both ends of the smoothing capacitor as output terminals of direct voltages, and changes a switching frequency according to an average voltage per unit time of the direct voltages output from the output terminals.

Abstract: A power conversion apparatus sets a point between AC input terminals of a full-wave rectifying circuit as an input terminal of an alternating voltage, connects a series circuit of two switches between DC output terminals, connects a series circuit of a capacitor and an inductor with a midpoint of the two switches, forms a closed loop with the first switch, the capacitor and the inductor, connects a series circuit of a diode and a smoothing capacitor with the midpoint of the two switches, forms a closed loop with the first switch, the diode and the smoothing capacitor, sets both ends of the smoothing capacitor as output terminals of direct voltages, and changes a switching frequency according to an average voltage per unit time of the direct voltages output from the output terminals.

Abstract: A power conversion apparatus sets a point between AC input terminals of a full-wave rectifying circuit as an input terminal of an alternating voltage, connects a series circuit of two capacitors between the input terminals, connects a series circuit of two switches between DC output terminals of the full-wave rectifying circuit, connects one end of a series circuit of a third capacitor and an inductor with a midpoint of the two switches, connects the other end thereof with a connection point of two capacitors, connects a positive electrode side terminal of a smoothing capacitor with a DC output terminal of a positive electrode of the full-wave rectifying circuit via a first diode, connects a negative electrode side terminal of the smoothing capacitor with a DC output terminal of a negative electrode of the full-wave rectifying circuit via a second diode for preventing counter current.

Abstract: A power conversion device includes a low-pass filter, a second inductor, a first switch, a third switch, a second capacitor, and a controller. The low-pass filter is configured for direct coupling to an alternating current power source. The first switch is connected in series with a second switch, a first connection point. The third switch is connected in series with a fourth switch, a second connection point. The second capacitor is coupled to the first switch, the second switch, the third switch, and the fourth switch. The controller turns on and off the first, the second, the third, and the fourth switches based on a voltage of the alternating current power source directly coupled to the low-pass filter, a circuit current through the second inductor, a voltage across the second capacitor, and an average output voltage of the load circuit.

Abstract: A power conversion apparatus comprises a circuit, a detection section and a control section. The control section supplies a pulse signal for enabling the first switch and the second switch to be opened and closed alternately according to a polarity of the alternating voltage power supply so that a sine wave current synchronized with a voltage phase of the alternating voltage power supply flows to the alternating voltage power supply on the basis of the voltages and current obtained from the detection section.

Abstract: A power converter consists of a power conversion circuit for converting alternating power into insulated direct power and a control unit. The control unit, based on a voltage of alternating voltage power supply and a circuital current flowing through the power conversion circuit, supplies pulse signals for alternatively opening or closing a group consisting of a first and a fourth switch and a group consisting of a second switch and a third switch to the two groups. Through the switching action, a current composed of the low-frequency component of an alternating voltage power supply mixed with the high-frequency component of a switch flows to the power converter.

Abstract: A power conversion device includes a power conversion circuit having first, second, third, and fourth switches, and a controller. The controller generates a first pulse signal for controlling the turning on and off of the first and fourth switches and a second pulse signal for controlling the turning on and off of the second and third switches, based on a circuit current flowing in the power conversion circuit and a voltage of an AC power source. The turning on and off of the switches causes the power conversion device to have a flowing current in which a high frequency component is mixed with a low frequency component.

Abstract: A power conversion apparatus is constituted by a power conversion circuit and a control section. The control section causes a gate driving signal to alternately open and close a set of a first switch and a fourth switch, and a set of a second switch and a third switch based on a circuit current flowing through the power conversion circuit and a voltage of an AC power supply. A current in which a high frequency component is mixed into a low frequency component of the AC power supply flows through the power conversion apparatus by the opening and closing the sets of the switches.

Abstract: According to one embodiment, a power conversion device includes a first switch serially connected to a second switch, a first diode serially connected to a second diode, the first switch and the first diode connected to the second switch and the second diode, an AC power supply and an inductor serially connected to a connection point between the first switch and the second switch and a connection point between the first diode and the second diode, a capacitor serially connected to ends of the first diode and the second diode connected, and a potential difference between the ends of the capacitor is used as an output voltage. The control unit supplies a pulse signal to the first switch and the second switch to provide a sinusoidal current through the AC power supply, based on a detected power supply voltage, a detected circuit current, and a detected capacitor voltage.

Abstract: A power converting apparatus supplies, on the basis of a power supply voltage of an alternating-current power supply, a circuit current flowing in a power conversion circuit, and a direct current of a direct-current power supply, a pulse signal for alternately opening and closing a pair of a first switch and a fourth switch and a pair of a second switch and a third switch to the pair of the first switch and the forth switch and the pair of the second switch and the third switch such that an electric current in which a high-frequency component is mixed in a low-frequency component of the alternating-current power supply flows to the power conversion circuit.

Abstract: According to one embodiment, a controller determines the polarity of the input voltage detected by an input voltage detector. Then, when the polarity of the input voltage is positive, the first switch is subject to pulse driving, and when the polarity of the input voltage is negative, the second switch is subject to pulse driving, where the pulse driving is carried out at an on/off timing determined on the basis of the respective detection outputs of an input voltage detector, an input current detector, an output voltage detector, and an output current detector.

Abstract: A controller outputs a pulse signal to a first switch and a second switch on the basis of a circuit current flowing through a power conversion circuit and a voltage of an alternating-current power supply. The first switch and the second switch alternately open and close. According to the opening and closing, an electric current in which a high-frequency current is mixed with a low-frequency component of the alternating-current power supply flows to the power conversion circuit.

Abstract: According to one embodiment, a controller determines the polarity of the input voltage detected by an input voltage detector. Then, when the polarity of the input voltage is positive, the first switch is subject to pulse driving, and when the polarity of the input voltage is negative, the second switch is subject to pulse driving, where the pulse driving is carried out at an on/off timing determined on the basis of the respective detection outputs of an input voltage detector, an input current detector, an output voltage detector, and an output current detector.

Abstract: A controller outputs pulse signals to a first switch and a second switch based on a circuit current flowing through a power conversion circuit and a voltage of an AC power supply. The first switch is opened and closed alternately to the second switch. According to the opening and closing, a current in which a high frequency component is mixed with a low frequency component of the AC power supply flows through the power conversion circuit.

Abstract: A power converter consists of a power conversion circuit for converting alternating power into insulated direct power and a control unit. The control unit, based on a voltage of alternating voltage power supply and a circuital current flowing through the power conversion circuit, supplies pulse signals for alternatively opening or closing a group consisting of a first and a fourth switch and a group consisting of a second switch and a third switch to the two groups. Through the switching action, a current composed of the low-frequency component of an alternating voltage power supply mixed with the high-frequency component of a switch flows to the power converter.

Abstract: A power converting apparatus supplies, on the basis of a power supply voltage of an alternating-current power supply, a circuit current flowing in a power conversion circuit, and a direct current of a direct-current power supply, a pulse signal for alternately opening and closing a pair of a first switch and a fourth switch and a pair of a second switch and a third switch to the pair of the first switch and the forth switch and the pair of the second switch and the third switch such that an electric current in which a high-frequency component is mixed in a low-frequency component of the alternating-current power supply flows to the power conversion circuit.

Abstract: A power conversion apparatus is constituted by a power conversion circuit and a control section. The control section causes a gate driving signal to alternately open and close a set of a first switch and a fourth switch, and a set of a second switch and a third switch based on a circuit current flowing through the power conversion circuit and a voltage of an AC power supply. A current in which a high frequency component is mixed into a low frequency component of the AC power supply flows through the power conversion apparatus by the opening and closing the sets of the switches.

Abstract: A controller outputs a pulse signal to a first switch and a second switch on the basis of a circuit current flowing through a power conversion circuit and a voltage of an alternating-current power supply. The first switch and the second switch alternately open and close. According to the opening and closing, an electric current in which a high-frequency current is mixed with a low-frequency component of the alternating-current power supply flows to the power conversion circuit.

Abstract: A power conversion device includes a power conversion circuit having first, second, third, and fourth switches, and a controller. The controller generates a first pulse signal for controlling the turning on and off of the first and fourth switches and a second pulse signal for controlling the turning on and off of the second and third switches, based on a circuit current flowing in the power conversion circuit and a voltage of an AC power source. The turning on and off of the switches causes the power conversion device to have a flowing current in which a high frequency component is mixed with a low frequency component.

Abstract: A controller outputs pulse signals to a first switch and a second switch based on a circuit current flowing through a power conversion circuit and a voltage of an AC power supply. The first switch is opened and closed alternately to the second switch. According to the opening and closing, a current in which a high frequency component is mixed with a low frequency component of the AC power supply flows through the power conversion circuit.