Print Email Facebook Twitter Novel digital controller for boost PFC Title Novel digital controller for boost PFC Author Gong, M. Contributor Ferreira, J.A. (mentor) Popovic, J. (mentor) Van Helvoort, J. (mentor) Willaert, J. (mentor) Faculty Electrical Engineering, Mathematics and Computer Science Department Electrical Power Engineering Programme Master of Science Date 2015-07-03 Abstract LED lighting, as the fourth-generation lighting technology, is developing rapidly over the past years due to its high energy efficiency, longer life span and sustainability compared to incandescent light bulbs and CFLs. Today’s stand-alone LED drivers for professional lighting systems contain two cascaded power converters: an input and an output power stage. The output power stage drives the LED load with constant average current to achieve a uniform light output without visible light flicker and stroboscopic effects. The input power stage is a boost converter which acts as a power factor corrector (PFC), providing to the mains a power factor (PF) of at least 0.9 and a constant average supply voltage to the output power stage. In high-end LED drivers, both the boost PFC converter as well as the converter in the output power stage are digitally controlled by a PI controller. The PFC controller currently being used has a low bandwidth as to not interfere with the power factor correction function. Because of this low bandwidth, disturbance from mains and load will be transferred to the boost PFC output capacitor, which, on its turn, can lead to undesired visible light effects if these disturbances are too large. The thesis aims at improving the dynamic response of the boost PFC converter without sacrificing PF/THD performance. Three solutions: 1. Digital notch/comb filter 2. Input voltage feedforward 3. Variable gain are proposed and investigated in detail. Simulation result for each solution shows improved dynamic response to both mains and load disturbances. Four criteria are applied to evaluate the 3 proposed methods. Finally system with notch filter is implemented to verify the performance of the proposed design. The experimental result shows improved dynamic response to both mains and load disturbances, as well as improved THD performance. Subject boost PFCController design To reference this document use: http://resolver.tudelft.nl/uuid:0f3b1bac-349c-47b9-b324-9f3b2adb9523 Embargo date 2017-07-03 Part of collection Student theses Document type master thesis Rights (c) 2015 Gong, M. Files PDF Report-Mingyao_Gong.pdf 2.9 MB Close viewer /islandora/object/uuid:0f3b1bac-349c-47b9-b324-9f3b2adb9523/datastream/OBJ/view