Optimization design of insulation structure of multiwinding high-frequency transformer based on response surface method

Purpose The purpose of this paper is to study the insulation structure optimization method of multiwinding high-frequency transformer (HFT). Design/methodology/approach This paper takes 100 kW, 10 kHz multiwinding HFT as the research object. First, the distribution of electric field strength within the core window of multiwinding HFT with different winding configurations is simulated by the electrostatic field finite element method. The symmetrical hybrid winding structure with minimum electric field strength is selected as the insulation design. To reduce the electric field strength at the end region of the winding, the electrostatic ring and angle ring are designed based on the response surface method. Findings The optimal results show that the maximum electric field strength can be reduced by 15.4%, and the low voltage stress can be achieved. Originality/value The above research provides guidance and basis for the optimal design of insulation structure of multiwinding HFT.