求开关电源的摘要的英文翻译，急！！！！！

The power source is electronic installation's essential functional module, its performance fit and unfit quality immediate influence to electronic installation's technical performance and reliability.
This article introduced the 25V/1A switching power supply's structure, the principle and the design process and so on. The entire power source by the input circuit, the leveling circuit, the feedback circuit, the overvoltage protection electric circuit, the overflow protection circuit, from restores the electric circuit, the output circuit and so on, but also has the soft start function. The switching power supply has the efficiency to be high, the volume is small, the weight is light, the reliability is high, the load shares and so on easily a series of characteristics. This topic uses the switching mode is the entire bridge all controls the rectification filter, moreover the power source has also utilized the soft switch technology, causes its loss to reduce obviously, the DC-DC transformation use cuts the wave boosted circuit to realize, the structure is simple, the transfer efficiency is high; Selects the small breakover resistance, the high shutter speed P60N06 tube for the switching valve, to select the quick recovery diode rectification, reduces the reverse breakover time, reduces the loss. Has realized the design requirements through the experimental verification electric circuit completely the basic quota, and the DC-DC conversion efficiency achieves 85%. The circuit design also has many insufficiencies, each design target also waits for further enhancing.

Power electronic equipment is an essential function modules, its direct impact on the performance of the merits of electronic equipment to the technical performance and reliability. In this paper, 25 V/1A the switching power supply structure, principles and the design process, and so on. Power input from the entire circuit, rectifier circuit, the feedback circuit, over-voltage protection circuit, overcurrent protection circuit, since the resumption of circuit, the output circuit, also has soft-start function. Switching power supply with high efficiency, small size, light weight, high reliability and easy to share the load, such as a series of features. The issue of switching methods used is the full-bridge rectifier filter, but also use the power of the soft-switch technology,