What is lacking from these publications is any way to determine what is sufficient cooling.  In this paper, a scientific method for determining local copper temperatures will be presented.  This will include evaluations of heat transfer coefficients for different sections of a multicomponent inductor, dependence of heat transfer coefficient on water pressure and water passage cross-section, non-uniform power density distributions in various 2-D cross-sections and the resulting temperature distribution in the copper winding.  The effects of duty cycle on optimal design will also be considered.

 This method may be incorporated into the standard coil design and development process, which can be used to prevent costly tooling lifetime issues during the early stages of a production run or avoid the purchase and use of unnecessary oversized or booster pumps.  It can also be used as a basis for more advanced future studies into temperature distributions and stresses within the induction coil itself, which lead to failure.