Design of Imperfectly Coupled Power Transformers for DC to DC Conversion

The equations required for analyzing the performance of imperfectly coupled transformers in dc-to-dc conversion applications are described. Results are shown for both the untuned and the tuned primary cases. Given the output power requirements and a reasonable set of limitations on the transformer parameters, the optimum transformer parameters can be detennined. An example is given of the optimization procedure used in designing the transcutaneous transformer for electric artificial heart applications.