Theoretical and experimental investigation of the voltage ripple across flying capacitors in the interleaved buck converter with extended duty cycle

Peter Zajec (Avtor), Mitja Nemec (Avtor)

Povzetek

The interleaved buck converter with an extended duty cycle is analyzed in terms of unexplored parasitic switching states that diminish the switch utilization and its safety due to high-magnitude charging and discharging currents. The analysis explains the origin of the states and their effects and demonstrates their correlation with the existing voltage ripple on flying capacitors. The article further demonstrates that the voltage ripple can no longer be arbitrarily chosen as parasitic states emerge whenever the ripple exceeds an identified critical value being equal to the twofold voltage drop on the diode. A simple design criterion for flying capacitance is proposed. For a limited set of battery-powered DC–DC converters, a solution permitting the use of smaller capacitance by adding an extra switch is proposed. The derived findings are verified using experimental and simulation results.

Ključne besede

enosmerni presmernik;pretvornik navzdol s prepletenim proženjem;parazitno stikalno stanje;DC-DC pretvornik;interleaved buck;parasitic switching states;

Podatki

Jezik:	Angleški jezik
Leto izida:	2018
Tipologija:	1.01 - Izvirni znanstveni članek
Organizacija:	UL FE - Fakulteta za elektrotehniko
UDK:	621.3
COBISS:	12011348
ISSN:	1996-1073
Št. ogledov:	124
Št. prenosov:	48
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Slovenski jezik
Sekundarne ključne besede:	DC-DC pretvornik;enosmerni presmernik;pretvornik navzdol s prepletenim proženjem;parazitno stikalno stanje;
Vrsta dela (COBISS):	Članek v reviji
Strani:	str. 1-13
Letnik:	ǂno. ǂ4
Zvezek:	1017
Čas izdaje:	Apr. 2018
DOI:	10.3390/en11041017
ID:	13641401