The invention relates to a converter assembly comprising a DC voltage intermediate circuit (1) for providing a DC voltage V.sub.DC, comprising a positive terminal and a negative terminal, and at least one machine converter (2) for converting the DC voltage V.sub.DC into a multi-phase AC voltage, wherein at least one energy storage capacitor (3, 3′) is arranged in the DC voltage intermediate circuit (1), and wherein a frequency-dependent resistor (4) which has a higher electrical resistance at high frequencies than at low frequencies is arranged in series with the energy storage capacitor (3, 3′).

A power conversion apparatus includes a filter capacitor to be charged with electric power fed from a main power source, and a power converter to convert electric power fed via the filter capacitor and feed the converted electric power to a load. The power conversion apparatus further includes a power-source contactor to electrically connect the filter capacitor and the power converter to the main power source or electrically disconnect the filter capacitor and the power converter from the main power source, and a discharging circuit connected in parallel to the filter capacitor. The power conversion apparatus also includes a discharge control circuit to close a discharging contactor included in the discharging circuit after opening of the power-source contactor, and thereby cause the filter capacitor to be discharged.

This power conversion device comprises: a power converter including a switching element; and a control unit which controls the power converter. The control unit calculates a torque electric current detection value and an excitation electric current detection value from an electric current flowing to an external device, and when an absolute value of the torque electric current detection value is greater than or equal to the excitation electric current detection value, performs control such that the excitation electric current detection value follows the torque electric current detection value.

For a serial multiplex inverter in which each phase includes cells connected serially, wherein each cell includes switching elements and is configured to output a level of +1 (ON), a level of zero (OFF), and a level of −1 (ON) as output levels by operation of the switching elements, a control device includes a switching load distribution control section. This control section is configured to: store information about an ON-output duration of each of the cells and information about an OFF-output duration of each of the cells; for a shift pattern from ON to OFF in the cells, put OFF a gate signal for one of the cells whose ON-output duration is the longest of the cells; and for a shift pattern from OFF to ON in the cells, put ON a gate signal for one of the cells whose OFF-output duration is the longest of the cells.

For a serial multiplex inverter in which each phase includes cells connected serially, wherein each cell includes switching elements and is configured to output a level of +1 (ON), a level of zero (OFF), and a level of −1 (ON) as output levels by operation of the switching elements, a control device includes a switching load distribution control section. This control section is configured to: store information about an ON-output duration of each of the cells and information about an OFF-output duration of each of the cells; for a shift pattern from ON to OFF in the cells, put OFF a gate signal for one of the cells whose ON-output duration is the longest of the cells; and for a shift pattern from OFF to ON in the cells, put ON a gate signal for one of the cells whose OFF-output duration is the longest of the cells.

A system may be provided that includes an energy storage device, and an inverter electrically coupled to the energy storage device. The system also includes a passive filter electrically coupled between the energy storage device and the inverter. The passive filter includes a first coupled-inductor and at least one first bypass capacitor. The first coupled-inductor includes at least two magnetically coupled windings. The passive filter is configured to reduce or eliminate alternating current at the energy storage device.

An inverter includes a DC input, a link capacitor including a plurality of input contacts fitted to a capacitor housing, a plurality of half-bridges, each including semiconductor switching elements for converting the DC current into an AC current having a plurality of phase currents, wherein the half-bridges are arranged in a row along a transverse direction to the inverter, a positive DC conductor rail and a negative DC conductor rail for the infeed of DC current to the half-bridges, wherein the positive and/or negative DC conductor rail extends in a transverse direction to the inverter over the row of half-bridges, such that the width of the positive and/or negative DC conductor rail extends to the width of the row of half-bridges, an AC conductor rail assembly for the output of AC current to the electric drive, and a cooler for cooling the half-bridges.

A power conversion device includes a first electrical component, a second electrical component, a housing, a board, and a guide part. The first and second electrical components are accommodated in and fixed to the housing. The board has first through holes into which first signal terminals of the first electrical components are inserted, and second through holes into which second signal terminals of the second electrical components are inserted. The guide part is connected to the board so that guide holes formed therein are aligned with the second through holes. The first signal terminals are connected to the board through a first connection portion, and the second signal terminals are connected to the board through a second connection portion. A number of the first through holes disposed per unit area is greater than a number of second through holes disposed per unit area.

A power conversion device includes a first electrical component, a second electrical component, a housing, a board, and a guide part. The first and second electrical components are accommodated in and fixed to the housing. The board has first through holes into which first signal terminals of the first electrical components are inserted, and second through holes into which second signal terminals of the second electrical components are inserted. The guide part is connected to the board so that guide holes formed therein are aligned with the second through holes. The first signal terminals are connected to the board through a first connection portion, and the second signal terminals are connected to the board through a second connection portion. A number of the first through holes disposed per unit area is greater than a number of second through holes disposed per unit area.

An integrated circuit includes a memory array that stores data, a rectifying circuit that rectifies an alternating current and generates a direct-current voltage, and a logic circuit that reads data stored in a memory. The memory array includes a first semiconductor memory element having a first semiconductor layer. The rectifying circuit includes a second semiconductor rectifying element having a second semiconductor layer. The logic circuit includes a third semiconductor logic element having a third semiconductor layer. The second semiconductor layer is a functional layer exhibiting a rectifying action and the third semiconductor layer is a channel layer of a logic element. All the first, second and third semiconductor layers, the functional layer exhibiting a rectifying action and the channel layer are formed of the same material including at least one selected from an organic semiconductor, a carbon nanotube, graphene, or fullerene.