Water‐cooled Copper‐clad Invar Hybrid Power Circuit Available to Purchase

Water cooling of hybrid modules allows a power dissipation much higher than that of conventional methods. This paper describes the design and construction of a copper‐clad Invar water‐cooled hybrid power circuit intended for use in a medical hand‐held tool which is a 25 mm diameter cylinder. The thermal study demonstrates the interest of a copper‐clad Invar heat exchanger: water flowing at a rate lower than 15 Ih−1 allows the dissipation of more than 50 W in the module while keeping the external temperature of the tool below 35°C.