Abstract: A circuit breaker and a power supply system. The circuit breaker is disposed between a direct current power source and a load, the circuit breaker includes a first coil, a second coil, a switch unit, and a driver, where the switch unit and the driver form a linkage connection. The direct current power source is coupled to a first end of the first coil and a first end of the second coil, both a second end of the first coil and a second end of the second coil are coupled to one end of the switch unit, and the other end of the switch unit is coupled to the load. Inductive reactance of the first coil is less than inductive reactance of the second coil.

Abstract: A power supply system includes one or more solid state transformers (SST), one or more first stage DC-DC converters and one or more second stage DC-DC converters. The one or more solid state transformers (SST) are configured to convert any medium-voltage Alternating Current (MVAC) input or medium-voltage Direct Current (MVDC) input to a first low-voltage Direct-Current (LVDC) output. The one or more first stage DC-DC converters are configured to convert the first low-voltage DC output to a second LVDC output. The one or more second stage DC-DC converters are configured to convert the second LVDC output to a third LVDC output. The third LVDC output is used to supply power to one or more servers in a data centre ICT load area.

Abstract: A remote power unit for providing direct current power to a remote power receiver in a direct current power system is provided. A residual current protection circuit comprises a first switch, which opens a positive voltage rail, and a second switch, which open a negative voltage rail. A first current sensor measures a first residual current between the first switch and the remote power receiver, while the first switch is closed and the second switch is opened. A second current sensor measures a second residual current between the second switch and the remote power receiver, while the second switch is closed and the first switch is open. A controller detects a residual current event, if the first residual current and/or the second residual current are above a residual current threshold.

Abstract: A power source is proposed comprising an output for a load. The power source is configured to provide a first voltage at the output. The power source is configured to detect a feedback at the output. The power source is further configured to provide a second voltage at the output based on the detected feedback. A high second voltage is only provided if an appropriate load is detected. This has the advantage that people are protected from electric shock e.g. when handling unconnected cables.

Abstract: A remote power unit for providing direct current power to a remote power receiver in a direct current power system is provided. A residual current protection circuit comprises a first switch, which opens a positive voltage rail, and a second switch, which open a negative voltage rail. A first current sensor measures a first residual current between the first switch and the remote power receiver, while the first switch is closed and the second switch is opened. A second current sensor measures a second residual current between the second switch and the remote power receiver, while the second switch is closed and the first switch is open. A controller detects a residual current event, if the first residual current and/or the second residual current are above a residual current threshold.

Abstract: A multiphase power converter includes a plurality of subconverters and a control circuit. Each subconverter has an input circuit, an output circuit, and a magnetic core coupling the input circuit to the output circuit. The magnetic core of at least one of the plurality of subconverters has a core section that is shared by the magnetic core of another one of the plurality of subconverters. The control circuit is configured to operate the input circuits of the plurality of subconverters with different phases. The magnetic cores may be cores of a transformer, a coupled inductor, etc.

Abstract: A power supply for providing power to a load includes a first subconverter having input terminals for coupling to a first input power source and output terminals and a second subconverter having input terminals for coupling to a second input power source and output terminals. The first subconverter is configured to supply an AC current and an AC voltage at its output terminals. The second subconverter is configured to supply one of a substantially constant DC current and a substantially constant DC voltage at its output terminals. At least one of the output terminals of the first subconverter is coupled to at least one of the output terminals of the second subconverter. The power supply is configured to supply the AC current, the AC voltage, the substantially constant DC current and the substantially constant DC voltage substantially simultaneously to the load.

Abstract: A parallel multi-winding magnetic structure includes a magnetic core defining a plurality of flux paths through the core and a plurality of windings extending around portions of the core. At least some of the windings are positioned adjacent a periphery of the structure. The structure further includes an electrical conductor extending along the periphery of the structure and the windings positioned adjacent the periphery of the structure.

Abstract: A multiphase power converter includes a plurality of subconverters and a control circuit. Each subconverter has an input circuit, an output circuit, and a magnetic core coupling the input circuit to the output circuit. The magnetic core of at least one of the plurality of subconverters has a core section that is shared by the magnetic core of another one of the plurality of subconverters. The control circuit is configured to operate the input circuits of the plurality of subconverters with different phases. The magnetic cores may be cores of a transformer, a coupled inductor, etc.

Abstract: An electronic circuit breaker has an input, an output, and a switch electrically connected between the input and the output. The electronic circuit breaker monitors the energy dissipated by the switch and opens the switch when the energy reaches a threshold value in order to protect the switch. The electronic circuit breaker also monitors the current through the switch and opens the switch when necessary to protect the load.

Abstract: An electronic circuit breaker has an input, an output, and a switch electrically connected between the input and the output. The electronic circuit breaker monitors the energy dissipated by the switch and opens the switch when the energy reaches a threshold value in order to protect the switch. The electronic circuit breaker also monitors the current through the switch and opens the switch when necessary to protect the load.