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Título del libro: 2010 Ieee Energy Conversion Congress And Exposition, Ecce 2010 - Proceedings
Título del capítulo: Fast control technique based on peak current mode control of the output capacitor current

Autores UNAM:
OSCAR PROSPERO GARCIA;
Autores externos:

Idioma:
Inglés
Año de publicación:
2010
Palabras clave:

Averaged models; Buck converters; Control implementation; External voltages; Fast control; Fast dynamic response; Feed-Forward; High switching frequency; Load currents; Output capacitor; Peak current mode control; Steady state; Voltage drop; Voltage-mode control; Bandwidth; Capacitors; Computer simulation; Dynamic response; Electric power supplies to apparatus; Energy conversion; Switching frequency; DC-DC converters


Resumen:

The control proposed and analyzed in this paper is based on the peak current mode control of the output capacitor current of a Buck converter. The output capacitor current loop provides fast dynamic response to the control since it behaves as a feed-forward of the load current while the voltage loop provides accurate steady state regulation. A simulation oriented averaged model of the proposed control has been developed to design the external voltage loop. As shown in simulations, with the converter switching at 5 MHz, the proposed control with a voltage loop of 50 kHz bandwidth has the same voltage drop and a similar dynamic response as a 1 MHz bandwidth voltage mode control. The reduction of the bandwidth makes easier the control implementation and integration. Finally, experimental results have been achieved verifying the fast dynamic response of the proposed control under load steps. © 2010 IEEE.


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