Abstract: An electrical converter includes three branches of series-connected converter cells, each converter cell including a rectifier, a DC link with a DC link capacitor and an inverter, the three branches are delta-connected at phase outputs of the electrical converter. In the method for controlling the electrical converter, the converter cells are controlled to generate three AC phase output currents at the phase outputs and a circulating current through the branches.

Abstract: A power module for medium and high-voltage frequency converter and a frequency converter comprising same. The power module has a three-phase alternating current input and a single-phase alternating current output, and comprises a circuit board (100), a rectifying module (120), a capacitor bank (130), and an inverting module (140), wherein the rectifying module, the capacitor bank and the inverting module are all mounted on the circuit board. The power module has a compact structure and is convenient to cool.

Abstract: A multi-phase electric drive includes a multi-phase power transformer, including a primary winding and a first number of secondary windings, said primary winding being electrically connectable to a source of multi-phase AC power; a first number of power units, each of said first number of power units having input connected with a corresponding one of said first number of secondary windings, and a multiple of said first number of power units being serially connected with respective others of said power units in each phase output line connectable to a multi-phase AC load; at least one measurement device, being electrically connected with said input to at least one of said first number of power units and being adapted for measuring an electrical quantity at the input thereto; and a control system, being adapted for detecting a fault based on a value for the measured electrical quantity.

Abstract: It is provided a multi-phase electric drive for use with a multi-phase AC load and the power unit thereof. The multi-phase electric drive includes a multi-phase power transformer with at least one primary winding and a plurality of secondary windings. The primary winding may be electrically connected to a source of multi-phase AC power. Power units may have an input connected with a corresponding one of said plurality of secondary windings and may have a single-phase controllable output to such multi-phase AC load. The power units may be serially connected with respective others of said power units in each phase output line and are connectable to said multi-phase AC load.

Abstract: A multi-phase electric drive includes a multi-phase power transformer, including a primary winding and a first number of secondary windings, said primary winding being electrically connectable to a source of multi-phase AC power; a first number of power units, each of said first number of power units having input connected with a corresponding one of said first number of secondary windings, and a multiple of said first number of power units being serially connected with respective others of said power units in each phase output line connectable to a multi-phase AC load; at least one measurement device, being electrically connected with said input to at least one of said first number of power units and being adapted for measuring an electrical quantity at the input thereto; and a control system, being adapted for detecting a fault based on a value for the measured electrical quantity.

Abstract: It is provided a multi-phase electric drive for use with a multi-phase AC load and the power unit thereof. The multi-phase electric drive includes a multi-phase power transformer with at least one primary winding and a plurality of secondary windings. The primary winding may be electrically connected to a source of multi-phase AC power. Power units may have an input connected with a corresponding one of said plurality of secondary windings and may have a single-phase controllable output to such multi-phase AC load. The power units may be serially to connected with respective others of said power units in each phase output line and are connectable to said multi-phase AC load.

Abstract: A power cabinet (100) for medium-high voltage inverters. The power cabinet (100) comprises a cabinet shell (110) and a support (120) for mounting power modules (210, 220, 230), wherein the support (120) comprises at least one pair of upright beams (121) and sliding rails (123) arranged on the paired upright beams (121), at least one column of space for accommodating the power modules (210, 220, 230) is formed by the at least one pair of upright beams (121), and the sliding rails (123) are used for supporting the power modules (210, 220, 230).

Abstract: A power module for medium and high-voltage frequency converter and a frequency converter comprising same. The power module has a three-phase alternating current input and a single-phase alternating current output, and comprises a circuit board (100), a rectifying module (120), a capacitor bank (130), and an inverting module (140), wherein the rectifying module, the capacitor bank and the inverting module are all mounted on the circuit board. The power module has a compact structure and is convenient to cool.

Abstract: The present disclosure relates to the cooling of electric and/or electronic components, in particular to an electric and/or electronic system with a cabinet, which includes a cabinet housing including a first aperture for receiving a stream of cooling air. The cabinet housing includes a second aperture for releasing the cooling air thereafter in an operating state of the cabinet. At least two modules, which each include a guiding structure with an inlet and an outlet, are provided in the cabinet. The at least two modules are arranged in the cabinet housing such that a branch of the major portion of cooling air flowing through the first aperture of the cabinet housing is enabled to flow into each module via the inlet guided by the guiding structure through the dedicated module to the outlet and thereafter through the second aperture out of the cabinet housing.

Abstract: A thermosiphon cooler arrangement is provided for the cooling of electric and/or electronic components, including a module of an electric and/or electronic system. The module includes a guiding structure and an inlet for receiving a stream of cooling air, and an outlet for releasing cooling air thereafter in an operating state of the module. The guiding structure is provided for guiding the cooling air entering through the inlet and leaving the module through the outlet in an operating state of the module. The module includes a thermosiphon cooler with an evaporator and a condenser for transferring a majority of a heat load to the cooling air in an operating state of the module. The evaporator is tilted with respect to the condenser wherein the condenser is arranged such that a major portion of the cooling air flows through the condenser.

Abstract: A converter cell of a modular converter is provided. The converter cell includes a bridging unit which has a mechanical bistable relay, an electronic switch, a drive for switching the relay and the electronic switch, and an energy store for supplying power to the mechanical relay, the electronic switch and the drive. The drive includes passive overvoltage detection configured to charge the energy store if the overvoltage is exceeded. The drive includes an additional switch which is closed when a voltage on the energy store exceeds a predefined value, and the drive supplies current from the energy store to at least one of the relay and the electronic switch. The drive has hysteresis, such that, if the voltage on the energy store is undershot, at least one of the relay and the electronic switch is still supplied with current from the energy store.

Abstract: A converter cell of a modular converter is provided. The converter cell includes a bridging unit which has a mechanical bistable relay, an electronic switch, a drive for switching the relay and the electronic switch, and an energy store for supplying power to the mechanical relay, the electronic switch and the drive. The drive includes passive overvoltage detection configured to charge the energy store if the overvoltage is exceeded. The drive includes an additional switch which is closed when a voltage on the energy store exceeds a predefined value, and the drive supplies current from the energy store to at least one of the relay and the electronic switch. The drive has hysteresis, such that, if the voltage on the energy store is undershot, at least one of the relay and the electronic switch is still supplied with current from the energy store.