開關(guān)電源外文翻譯-其他專業(yè)(存儲版)
【正文】 frequency switching power supply isthe core ponent of the higher frequency, size, weight and output ratio smaller. And therectifier output filter : Under load the need to provide stable and reliable DC power supply. The control circuit while output from the sample, with the set standards, then controlledinverter, change its frequency or pulse width output achieve stability, on the other hand,according to test data provided by the circuit by circuit protection identification, Controlcircuit for the unit for various protection measures. In addition to providing detection circuitprotection circuit is running various parameters, but also provide information displayinstruments. The auxiliary power supply circuit for the single power supply to the differentrequirements. The change switch connected to the work cycle time and the ratio of the voltage betweenthe average change also, therefore, With the load and input supply voltage changes andautomatically adjust ratio, it will cause the output voltage unchanged. Change the access timeand cycle percentage change is the pulse duty cycle. This method, known as time ratiocontrol (Time Ratio Control, for the initials TRC). TRC under control principle, there are three ways : 1. Pulse width modulation (PulseWidth Modulation, acronym for PWM) switching constant cycle by changing the pulse widthto change the duty cycle approaches. 2, pulse frequency modulation (Pulse FrequencyModulation, acronym for the PFM) conduction pulse width constant by changing theswitching frequency to change the duty cycle approaches. 3, mixed conduction modula
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