Abstract: Provided is a control system for a PV array system including a plurality of PV panels. The control system includes a bypass module having a first switch device and a second switch device disposed at at least one PV panel connected with others of the plurality of PV panels along a string, and configured to perform a switching operation when PV voltage at the at least one PV panel is outside of an acceptable voltage range of the PV array system, and the bypass module short-circuits the PV panel when excess voltage at the PV panel is detected. The control system also including a control module configured to monitor and control operation of the bypass module.

Abstract: A soft start system for starting large motors has a power supply suitable for passing power to the motor, a variable frequency drive connected to the power supply and an autotransformer connected between the variable frequency drive and the motor for passing power of an elevated current to the motor. A switch is connected between the motor and power supply for connecting the motor to the power supply when the motor reaches a desired speed. The autotransformer includes a single core with a winding extending over the single core. The autotransformer includes a first terminal connected the variable frequency drive, a second terminal connected the motor and a grounded neutral.

Abstract: An energy supply unit includes a primary coil which is at least indirectly connected to an energy source. In a secondary coil which is at least indirectly connected to the control circuit, and an insulating section formed between the primary coil and the secondary coil. The auxiliary energy is transmitted via the insulating section by way of a magnetic alternating field. The energy supply unit further includes a first carrier plate, a primary coil embodied as a flat coil situated on the first carrier plate, a second carrier plate, and a secondary coil embodied as a flat coil situated on the second carrier plate. The insulating section is embodied as an interferric space formed between the primary coil and the secondary coil.

Abstract: An energy supply unit includes a primary coil which is at least indirectly connected to an energy source. In a secondary coil which is at least indirectly connected to the control circuit, and an insulating section formed between the primary coil and the secondary coil. The auxiliary energy is transmitted via the insulating section by way of a magnetic alternating field. The energy supply unit further includes a first carrier plate, a primary coil embodied as a flat coil situated on the first carrier plate, a second carrier plate, and a secondary coil embodied as a flat coil situated on the second carrier plate. The insulating section is embodied as an interferric space formed between the primary coil and the secondary coil.

Abstract: A device for carrying high currents at a low inductance, in particular for a power converter or the like, is provided with two flat electrical conductors which are arranged roughly parallel to each other and are spaced apart from each other. The space between the two conductors contains no transition from one of the two conductors to a solid-state insulator, and from there to the other of the two conductors. As a result, no aging phenomena can arise in the device according to the invention owing to partial discharges.

Abstract: A power converter having two main switches connecting an outlet either to a positive rail or to a negative rail, two free-wheel diodes enabling the current through the load to be maintained, two snubber capacitors, and an auxiliary circuit. The auxiliary circuit includes an auxiliary inductor in series with two auxiliary switches coupled between the outlet and a midpoint of a capacitive voltage divider that provides a midpoint voltage. A detector detects current oscillation between the auxiliary inductor and the snubber capacitors, and then switches off the oscillation current and allows the intended main switch to conduct in response to the interruption.