| With the implementation of energy conservation and emission reduction policy, the demand for high power high frequency switching power supply with characteristics of low losses, small volume and proven reliability is growing to every walk of life. As an essential element of industry, the loss, volume and temperature rise of high frequency switching power supply makes a crucial difference to the integrity of switching power supply. It is of great economic benefit and social significance to study that frequency switching power supply reduces energy consumption under the trend of high frequency.This paper conducts a research based on the practical engineering background of the enterprise cooperation project "The Development of High Efficient UV Switching Power Supply by High-power Electrodeless Adjustment", taking the High frequency efficient printing in actual production as the research object, aiming at reducing the loss and the volume, taking circuit and structure design, and high frequency transformer optimization design as the study emphasis. The power of the developed prototype experiment measured the overall efficiency of92.2%, high frequency transformer efficiency increased by0.309%than before optimization.The Internal temperature field testing of the power supply meet the design requirements,verify the rationality of the design of the structure of the heat.1Main power high-frequency printed circuit, DC-DC inverter circuit, an inverter control circuit, drive circuit, and a power supply protection circuit overall structure were designed in article.2It comparatively analyzes the loss characteristics of several magnetic core materials at different frequencies and magnetic flux density which provides a reference for the choice of the magnetic core materials. It also analyzes the relationship between geometry size of toroidal core and loss of magnetic core, and launches its normalization formula which provides a reference to optimize the design for toroidal core size. It investigates winding equivalent factor from Dowell model as a reference for selection of winding conductor and winding layout.3It improves the sorting strategy and the selecting truncation strategy based on the method of AP to design6kW high frequency transformer in fusion algorithm of NSGA-II and particle swarm, establishes optimization function model of losses and volume of high frequency transformer, optimizes the design of the four transformers with a fusion algorithm.4It applies Asoft Maxwell to winding equivalent factor and winding layout with the two dimensional simulation, and to the relationship between geometry size of toroidal core and loss of magnetic core with the three dimensional simulation which can verify the related theory in Chapter three. Using the three dimensional simulation to the after optimization transformer models.5Internal temperature field of the power supply prototype dynamic loss were tested, and the overall verify thermal design power source structure and the rationality of the high-frequency transformer optimization design. |
