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向大型电子计算机供电的直流稳压电源,需要输出几百安培电流。这种电源的电路方案有多种选择:如中频交流稳压的多相整流电路;开关电源并联应用等。但随着大功率开关器件的发展,单台开关电源的容量也不断扩大。这样,开关电源单位输出功率的元器件数就越来越少。国外现已看到1500W输出的商品广告。我们采用国外功率器件,研制了1300W(-5.2V,250A)输出的晶体管全桥变换器开关电源,其工作频率为25千赫芝,是脉宽调制式的直流—直流变换器。它由高压整流滤波器、功率变换桥、驱动器、主功率变压器、低压整
A DC power supply that powers a large computer needs hundreds of amps of output current. This power supply circuit options have a variety of options: such as multi-phase AC voltage regulation rectifier circuit; switching power supply applications in parallel. However, with the development of high-power switching devices, the capacity of a single switching power supply is also constantly expanding. In this way, switching power supply unit output power of fewer and fewer components. Now see 1500W output of goods advertising. We use foreign power devices, developed a 1300W (-5.2V, 250A) output transistor full-bridge converter switching power supply, the operating frequency of 25 kHz, is a pulse width modulated DC-DC converter. It consists of high-voltage rectifier filter, power conversion bridge, driver, main power transformer, low voltage