Panasonic Intellectual Property Management Co., Ltd.

Makoto Ozone

Fumito Kusama

Takaaki Norisada

Yutaka Kamon

Kenichi Asanuma

Keiji Akamatsu

Go Yamada

A power conversion system according to the present disclosure includes a plurality of power converters for performing power conversion on AC power and is connected to a power grid of multi-phase power that is a combination of multiple alternating current sources with mutually different phases. Each of the plurality of power converters includes a power converter circuit, a setting unit, and a control circuit. The power converter circuit performs power conversion between either DC power or AC power and AC power supplied from any of the multiple alternating current sources. The setting unit selects one of the multiple alternating current sources as a target of the power conversion to be performed by the power converter circuit. The control circuit controls operation of the power converter circuit in accordance with selection made by the setting unit.

Power converter and power conversion system

A control unit controls an inverter circuit such that a positive voltage and a negative voltage are alternately applied to a primary winding. The control unit controls a cycloconverter so as to allow no power to be transmitted between the cycloconverter and the inverter circuit in a first period including an inversion period during which a voltage of the primary winding has its polarity inverted. The control unit also controls the cycloconverter so as to allow power to be transmitted either in a first direction from the cycloconverter toward the inverter circuit, or in a second direction opposite from the first direction, in a second period different from the first period.

Regenerative power conversion system with inverter and converter

The control unit controls the converter unit not to cause transfer of power between the transformer circuit unit and the converter unit in the first time period including the reversal time period in which a reversal of polarity of the voltage across the primary winding occurs. The control unit controls the converter unit to cause transfer of power in the first direction from the transformer circuit unit to the converter unit or the second direction opposite to the first direction in the second time period different from the first time period.

Power conversion system

A power conversion system includes a first capacitor, an isolated type converter circuit, and a control circuit. The first capacitor is connected to the direct-current power supply via an inrush current prevention circuit. The inrush current prevention circuit is switchable at least between a high-impedance state and a low-impedance state. The converter circuit includes a transformer, and the first capacitor is connected to a primary winding wire of the transformer. The control circuit controls the inrush current prevention circuit and the converter circuit to cause the converter circuit to start operating, and then, the control circuit switches the inrush current prevention circuit from the high-impedance state to the low-impedance state.

Growing community of inventors

Osaka, Japan

Makoto Ozone