Cooler-Housing Contact Layout for EMC-Stable Power Electronics

The patent applies the equipotentiality principle by providing an electrically conductive connection between the cooler and the housing. This equalizes the electrical potentials of both components, preventing potential differences that would otherwise cause electromagnetic interference and capacitive couplings during switching operations. The conductive connection ensures both components operate at the same electrical potential while maintaining their cooling function.

The patent converts the harmful electromagnetic radiation issue into a benefit by using the metal cooler's electrical conductivity to its advantage. Instead of treating the metal's conductivity as solely a source of interference, the invention utilizes it to create an equipotential connection with the housing, thereby eliminating potential differences and their associated harmful effects while maintaining efficient heat dissipation.

The patent applies the universality principle by making the housing serve multiple functions: it provides mechanical protection for the electronic components and simultaneously acts as an electromagnetic shield and an electrical reference potential. By integrating these functions into the existing housing structure rather than adding separate shielding components, the solution avoids increasing device complexity while achieving electromagnetic compatibility.