Patent ID: 8680444

Claim:
A soldering apparatus for connecting solar cells including a heat source that operates on the induction principle and connects conducting tracks of the solar cells, that are provided with soldering medium, with electric conductors, comprising: a high-frequency electrical current generator; and an inductor loop connected to said generator for receiving a high-frequency electrical current, wherein said inductor loop is formed in a U-shape having at least one arm in a wave shape, wherein flowing of the high-frequency electrical current through said inductor loop generates a high-frequency magnetic field, said inductor loop being shaped to extend along a length of one of the conducting tracks, wherein said magnetic field induces in the one conducting track, in an electric conductor that is arranged along the one conducting track and in an associated soldering medium eddy currents that generate heat and perform a soldering operation connecting the one conducting track and the electrical conductor mechanically and electrically together, and wherein said inductor loop has another arm extending generally parallel to said at least one arm, said at least one arm having a plurality of alternating widenings and narrowings relative to said another arm, wherein the widenings are defined by a maximum distance between adjacent portions of said at least one arm and said another arm, and the narrowings are defined by a minimum distance between adjacent portions of said at least one arm and said another arm, wherein the widenings and narrowings are spaced apart consecutively and substantially linearly along a length of said at least one arm and energetically optimize the high-frequency magnetic field and provide energetically economical operation of said high-frequency generator, wherein each of the widenings has substantially a same size and is configured to receive an associated magnetic-field-neutral pressure foot.