The method involves providing an input-side semi-bridge (20) and a full bridge (21) that are connected in parallel with an intermediate circuit capacitor (22). Submodules (5a-5c) are alternatingly connected to a power supply circuit (8). An intermediate ci...

Apparatus for providing electrical power to subsea equipment in a subsea well facility comprises, at a topside location: first means (1, 2, 6) for providing a direct electrical current; second means (7) for converting said direct electrical current to an a...

The purpose of the present invention is to obtain a power converter that can further improve the maintainability after the power converter is stopped without reducing the power conversion efficiency when the power converter is operating. The power converte...

The purpose of the present invention is to obtain a power converter that can further improve the maintainability after the power converter is stopped without reducing the power conversion efficiency when the power converter is operating. The power converte...

Both ends of a direct-current power source 1 are connected with capacitors C1, C2 which are connected in series. The interconnection point of the capacitors C1, C2 is connected with one end of an electric power system 2 and one end of a reactor L. Both end...

A power converter is installed in a casing 20 attached beneath the floor of an electric vehicle. The power converter includes a capacitor unit 6 and a power semiconductor module 5 housed in a hermetically sealed part 1 of the casing 20 closed by a cover 21...

An alternating current (AC) voltage circuit is decoupled from a direct current (DC) voltage circuit during free-wheeling phases using switching elements (V1-V4) arranged in the direct current voltage circuit, so that free-wheeling current flows through one...

An alternating current (AC) voltage circuit is decoupled from a direct current (DC) voltage circuit during free-wheeling phases using switching elements (V1-V4) arranged in the direct current voltage circuit, so that free-wheeling current flows through one...

A plurality of motors (14, 16, 18) for use in driving accessories (15, 17, 19) on a vehicle, are each powered by three-phase current. A single controller (12) controls the supply three-phase current to the plurality of motors. In another aspect of the inve...