[宝典]dcdc级联变换电路设计与完成英文文献和翻译.doc

DC - DC converter (DC / DC) converter is widely used in remote and data communications, computer, office automation equipment, industrial instrumentation, military, aerospace and other fields related to the national economy all walks of life.Divided by the size of the rated power, the DC / DC can be divided into 750W, 750W 1W and 1W to the following three categories. In the 1990s, the growth rate of the DC / DC converter in low power range greatly improved, 6W of ~ 25WDC/DC converter growth rate, this is because they are used extensively for DC measurement and test equipment, computer display systems, computers and military communications systems.By the low-power high-speed microprocessors, DC / DC converter to the direction of the power development is an inevitable trend, so the faster growth rate of 251W ~ 750W DC / DC converter, which it is used services of medical and laboratory equipment, industrial control equipment, telecommunications equipment, multi-channel communication and transmission equipment, DC / DC converter in the field of remote and digital communications has broad application prospects. DC / DC converter will transform a fixed DC voltage to a variable DC voltage, this technique is widely used in the trolley bus, subway, trains, electric cars continuously variable transmission and control, while making the above control has accelerated stable respond quickly to performance, and at the same time receive the effect of saving energy. DC chopper instead of the rheostat savings 20% to 30% of the energy. DC chopper can not only play the role of the regulator (SMPS), can also play a role effectively suppress the noise of the grid side harmonic current. DC / DC converter has been commercialized, the module uses high-frequency PWM technology, the switching frequency is about 500kHz, the power density of 0.31W/cm3 ~ 1.22W/cm3. With the development of the LSI, the power supply module to achieve the miniaturization is necessary to conti