Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.

Solaredge Technologies Ltd.

Heribert Schmidt

Bruno Burger

Lior Handelsman

Tzachi Glovinsky

Amir Grossberg

Stefan Reichert

Jürgen Ketterer

Dirk Uwe Sauer

Martin Jantsch

Sönke Rogalia

Christoph Siedle

Werner Roth

Jörg Bornwasser

Juergen Ketterer

A circuit board adapted for use in an switching converter for connecting a plurality of switches including a first switch, a second switch, a third switch and a fourth switch. The circuit board has a layout for connecting the switches. The layout is adapted for locating the switches substantially at or symmetrically with respect to the endpoints of a right-angle cross. The right-angle cross is formed from two line segments intersecting with a ninety degree angle. The circuit board may offsets the switches perpendicularly to the line segments at the endpoints of the line segments either in a clockwise or a counterclockwise direction.

Switching circuit layout with heatsink

The invention relates to a circuit arrangement for producing an alternating voltage or an alternating current from a unipolar direct current source having an inverter relating to a neutral conductor. The direct current source is connected to an inverter which converts the unipolar voltage of the direct current source into a bipolar intermediate circuit voltage that is stored in a buffer circuit (C, C) which is connected to the inverter. The inverter comprises a clocked switch (S) and an energy converting unit which is configured as a dual coil (DR,DR) having two windings (W,W) which are closely coupled to each other.

Circuit arrangement having a dual coil for producing an alternating voltage or an alternating current

Controllable change-over apparatus for a solar module comprises an output terminal, a DC/DC converter, a controllable switching device and a control. The controllable switching device is implemented with a first switch position and a second switch position, wherein, in the first switch position, a power output of the solar module is connected to the output terminal via the DC/DC converter, and, in the second switch position, the power output of the solar module is connected to the output terminal by bypassing the DC/DC converter. The control switches the controllable switching device by using a performance characteristic for switching the same to the first or second switch position. In particular, the control is implemented to connect the solar module directly to its output terminal in the case of high power dissipation of the same, i.e. at strong solar radiation, and to connect the solar module to the output terminal via the DC/DC converter in the case of weak power dissipation of the same, i.e. during shading, which significantly increases the efficiency compared to a fixed connection of the solar module.

Controllable change-over apparatus for a solar module

A circuit breaker for a solar module, wherein a plurality of solar cells working in normal operation and when shaded are connected in series. At least one controlled electrical switch element serves as a bypass element and is connected in parallel with its contact gap to a plurality of solar cells. A supply circuit provides a control voltage for controlling the control electrode of the bypass element. An isolating circuit blocks the voltage applied to the contact gap of the bypass element in the normal operation and switches the voltage that is applied to the contact gap to the supply circuit when at least one solar cell is shaded.

Protective circuit device for a solar module

A DC/AC converter is disclosed having two DC voltage connections (), between which are provided in a parallel circuit configuration, an intermediate energy storage (C) and a bridge circuit providing at least two parallel branches, each branch providing two in-series-connected switch units (A,B and C,D), to each of which a rectifier diode (DA,DB,DC DD) is connected in parallel, and having at least two AC connections, of which each single AC connection is connected via a connecting line, in each of which an inductor (Lrespectively L) is provided, to one of the parallel branches of the bridge circuit between two the switch units (A,B respectively C,D) via one connecting node. In at least two connecting lines, two separate electrical connecting paths are provided, in each of which a switch (E respectively F) and an in-series-switched rectifier diode (DE respectively DF) are provided. The rectifier diodes (DE,DF) in the single connecting paths are switched in an opposite conducting direction.

DC/AC converter to convert direct electric voltage into alternating voltage or into alternating current

The invention relates to a device ( ) for determining the density of an electrolyte ( ). Said device ( ) comprises at least two immersion tubes ( ) provided with an open orifice ( ) and immerging at different depths in the electrolyte ( ), whereby said immersion tubes can be respectively filled with gas to a depth ( ) which is allocated thereto and each tube has a different gas depth (d) with respect to the other. A least one differential pressure sensor ( ) is used to define the difference in pressure inside the immersion tubes ( ). An electrode ( ) is respectively provided inside the immersion tubes ( ), whereby said electrode is connected to a voltage source ( ) in order to produce the required depth ( ) of gas so that said immersion tubes ( ) can be filled therewith upon contact with the electrolyte( ).

Device for determining the density of an electrolyte

Method and device for charge exchange between a plurality of energy

Apparatus for charge exchange among a plurality of series connected

Method and apparatus for charging and/or charge exchange between a

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Freiburg, Germany

Heribert Schmidt