Performance Enhancement of Advanced Solid State Power Converter for Industrial Applications
Keywords:AC-DC Converter, PID Controller, Boost Converter
This paper deals with the design of high efficient ac-dc converter with a high power factor for industrial applications. The conventional AC-DC converter has a diode rectifier followed by a feed-forward or a flyback converter with or without a boost cell. A generally changing dc transport voltage implies that the converter should have a fitting hold-up time when the dc transport voltage is low or high, which, thusly, implies that the dc transport capacitors should be chosen for a few transport voltages rather than only one. In this converter, if the voltage across the capacitor the rectifier is stable and steady irrespective of input and load fluctuation then voltage regulation can be easily achieved hence a new topology is being proposed by modifying the conventional converter to minimize fluctuations. The switching on time a MOSFET will decide the voltage level of the DC bus capacitor and depending on the DC bus capacitor voltage either both transformers can be made to transfer energy to load (dual fly-back mode) are the only transformer two alone can be made transfer energy to load. The PID controller while sampling the actual voltage and compare with the set voltage to generate an error signal which is used to modify the ON time of the PWM pulse in order to maintain the output at the desired value.
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Copyright (c) 2021 R. Sagayaraj, G.R. Subhashree , L. Nagarajan, P. Sabarish, P. Ragupathy
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