Semikron Elektronik Gmbh &co.kg

Kevork Haddad

Dejan Schreiber

A DC/DC converter circuit having feedback capability with a first converter device whose two inputs form the inputs of the DC/DC converter circuit and can be connected to a DC voltage source. The DC/DC converter circuit has a DC voltage-coupled second converter device whose outputs form the outputs of the DC/DC converter circuit and can be connected to a DC voltage sink, wherein the second converter device is in the form of a DC/DC converter cell or of a DC/DC converter cell arrangement having two DC/DC converter cells.

DC/DC converter cell and circuit with feedback capability, and method for its operation

A circuit having a plurality of parallel-connected partial circuits for feeding an inverter circuit. A partial circuit comprises an unregulated voltage source with a temporally variable output DC voltage and a synchronous converter having an automatically functioning regulating circuit. The circuit is triggered according to two modes of operation. The first mode of operation is as an upward converter, when the value of the output voltage of the unregulated voltage source exceeds a threshold value, and thus the inverter circuit is supplied with the requisite input voltage. The second mode of operation is as a downward converter, when the value of an output voltage of the unregulated voltage source is below a threshold value, or when there is no output voltage from the unregulated voltage source, in which case a first capacitor is charged from the DC voltage applied to the second terminals.

Switching configuration and method for the production of an alternating voltage from at least supply terminals with temporally variable output DC voltage

A circuit, having a plurality of regulated, parallel, voltage sources, an a.c.-d.c. converter circuit and a regulating unit, and a method for controlling it. The regulated voltage sources include an unregulated voltage source of a temporally variable output d.c. voltage, a step-up converter and an associated regulating device, where the step-up converter is a three-point step-up converter. The regulating unit measures the intermediate circuit voltage of the a.c.-d.c. converter circuit and is connected with the regulating devices. In the method for control, the regulating unit determines the voltage in the intermediate circuit of the a.c.-d.c. converter circuit and from this determines, as a function of the maximally and minimally permissible intermediate circuit voltage, a set-point value for the output voltage of the regulated voltage sources. This set-point value is transmitted to the regulating devices, from which the regulating devices determine the control conditions for the step-up converter.

Switching configuration and procedure for the production of one alternating voltage from a majority of unrelated supply terminals with temporally variable output DC voltage

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Kevork Haddad