A power converter including an inverter for converting electric power output from a power supply, a first power feeding bus connected to the inverter and to the positive side of the power supply, a second power feeding bus connected to the inverter and the negative side of the power supply, and a plurality of connection circuits including a resistant member and a capacitive member which are connected in series, connected between the first power feeding bus and the second power feeding bus, and having at least two or more different impedances.

A control device (2) of an inverter converts electrical power generated by a solar cell (3) into alternating current power connecting to an electric power system (7). The control device includes: an alternating current voltage sensor (14) sensing a system voltage (Vr) of the electric power system; an MPPT executer (23) controlling a direct current voltage (Vdc) applied to the inverter (1) to cause the electrical power output from the solar cell (3) to be a maximum when the direct current voltage (Vdc) is higher than a lower limit (VL); a direct current voltage lower limit calculator 22 reducing the lower limit (VL) when the system voltage (Vr) is lower than a predetermined voltage; and an electrical power controller (25) controlling reactive power based on the system voltage (Vr), the reactive power being output from the inverter (1).

Even when a grounding capacitor is included at either end of a common mode coil, there is noise that flows from a load into a metal frame, and there is a need to restrict an amount of noise propagating to a system power supply. Because of this, a noise loop is formed of a rectifier circuit, an inverter, a first electrical wire that connects a positive polarity side of the rectifier circuit and the inverter, a second electrical wire that connects a negative polarity side of the rectifier circuit and the inverter, a ground wire terminal that can connect a load connected to an output terminal or the inverter, and a conductive plate that connects at least one or the first electrical wire and second electrical wire and the ground wire terminal.

According to one embodiment, a voltage converting device includes a DC power source; an inverter generating AC power; an AC component detector configured to detect an AC component of current flowing through a first terminal or a second terminal of the inverter in the DC power source side; and a phase estimator configured to estimate a phase relation between a phase of voltage of the AC power and a phase of current of the AC power based on an amplitude of a specific frequency component contained in a first absolute value signal of the AC component. The AC power generated by the inverter is supplied to a loading device, and an impedance of the loading device at a fundamental of a driving frequency of the inverter is smaller than an impedance of the loading device at an odd-order harmonic of the driving frequency.

One or more techniques and/or systems are provided for facilitating a shutdown of output power from an energy panel arrangement to an inverter. A shutdown implementation module is coupled between an energy panel arrangement and an inverter that converts DC power from the energy panel arrangement to AC power for an AC power grid. A communication connection is established, over a power-line communication line, between the shutdown implementation module and a shutdown controller associated with the inverter. Responsive to identifying a loss of the communication connection or receiving a shutdown instruction over the power-line communication line, the shutdown implementation module shuts down output power from the energy panel arrangement to the inverter. The shutdown implementation module may be located within a threshold distance from the energy panel arrangement (e.g., within about 10 feet) so that the output power may be shutoff within a threshold timespan (e.g., within about 10 seconds).

One or more techniques and/or systems are provided for facilitating a shutdown of output power from an energy panel arrangement to an inverter. A shutdown implementation module is coupled between an energy panel arrangement and an inverter that converts DC power from the energy panel arrangement to AC power for an AC power grid. A communication connection is established, over a power-line communication line, between the shutdown implementation module and a shutdown controller associated with the inverter. Responsive to identifying a loss of the communication connection or receiving a shutdown instruction over the power-line communication line, the shutdown implementation module shuts down output power from the energy panel arrangement to the inverter. The shutdown implementation module may be located within a threshold distance from the energy panel arrangement (e.g., within about 10 feet) so that the output power may be shutoff within a threshold timespan (e.g., within about 10 seconds).

As paths for a current flowing through a conductor, a first current path through which a current flows from a first conductive portion to a second conductive portion, and a second current path through which a current flows from a third conductive portion to the second conductive portion are provided. Each of the first conductive portion, the second conductive portion, and the third conductive portion has a plate shape, a point P1 is located on a plate surface of the first conductive portion, and a point P2 is located on a plate surface of the second conductive portion. A current detecting circuit detects a value related to a potential difference between the points P1 and P2, and outputs a voltage value corresponding to a values of a current flowing through each of the first current path and the second current path.

As paths for a current flowing through a conductor, a first current path through which a current flows from a first conductive portion to a second conductive portion, and a second current path through which a current flows from a third conductive portion to the second conductive portion are provided. Each of the first conductive portion, the second conductive portion, and the third conductive portion has a plate shape, a point P1 is located on a plate surface of the first conductive portion, and a point P2 is located on a plate surface of the second conductive portion. A current detecting circuit detects a value related to a potential difference between the points P1 and P2, and outputs a voltage value corresponding to a values of a current flowing through each of the first current path and the second current path.

An object of the present invention is to reduce wire inductance without damaging manufacturability of a power converter. A power converter according to the present invention includes a power semiconductor module, a capacitor, and DC bus bars and. The capacitor smooths a DC power. The DC bus bars and transmit the DC power. The DC bus bars and include a first terminal and a second terminal. The first terminal connects to the power semiconductor module. The second terminal connects to the capacitor. The DC bus bars and form a module opening portion to insert the power semiconductor module. The DC bus bars and form a closed circuit such that a DC current flowing between the first terminal and the second terminal flows to an outer periphery of the module opening portion.

An electric power conversion control apparatus includes: a first converter of the first electric power conversion control apparatus and a second converter of the second electric power conversion control apparatus, which feed electric power to a first winding wire and a second winding wire of a dual three-phase motor; a first controller and a second controller, which control the first converter and the second converter; a communication line, which is connected between the first controller and the second controller; and a fifth signal wire for deactivating the operation of the second converter, from the first controller. When a fault is caused by communication errors, the first controller uses the fifth signal wire to deactivate the operation of the second converter, and the electric power conversion control apparatus switches to one system operation by the first controller.