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	Comparison of continuous and transition mode in a PV-booster with GaN-transistors and switching frequencies up to 250 kHz	[View]   [Download]
Author(s)	David DERIX
Abstract	A 1.8 kW boost converter for a PV-inverter with a switching frequency up to 250 kHz is analyzed.The boost converter consists of two parallel legs and the hardware is built so that chokes andsemiconductors can be exchanged easily. Two different operating modes, the Continuous InductionCurrent Mode (CICM) with a fixed switching frequency of fS = 250 kHz and the Transition Mode(TM) with a variable switching frequency are compared. The basic operation principles are explainedand efficiency measurements on real hardware under different conditions (output power,semiconductors (GaN/Si)) are shown. An improved version of the Transition Mode is developedwhich leads to higher efficiencies. Exceptional efficiencies of _max,CICM = 98.2 \% in CICM atfS = 250 kHz and _max,eTM = 98.7 \% in enhanced TM are obtained.
Download	Filename: 0110-epe2015-full-10390968.pdf Filesize: 298 KB
Type	Members Only
Date	Last modified 2016-06-08 by System