High-frequency high-voltage DC isolation transformer-rectifying module for power supply of technological equipment

摘要

Highly efficient (98%) transformer-rectifying module (20 kW 20 kHz, SO kV d.c. isolation) for high-voltage power supplies is examined. The design of transformer in a structure of the module is based on settlement of a number of technical contradictions. Minimum leakage inductance is to be provided at large space gap between windings. Electrostatic shields give a possibility to reduce the effects of system transients. At the same time, they raise equivalent capacitance of transformer and cause stepping-up of voltage at no-load. This paper represents results of investigation of electromagnetic and thermal processes in the module and proposes some ways for solving the contradictions indicated.