TY - GEN
T1 - Null response to a large signal transient in an augmented dc-dc converter
T2 - 2010 IEEE 12th Workshop on Control and Modeling for Power Electronics, COMPEL 2010
AU - Kapat, Santanu
AU - Krein, Philip T.
PY - 2010
Y1 - 2010
N2 - The maximum closed-loop bandwidth of a dc-dc converter is restricted to a fraction of its switching frequency, while governed by a conventional pulse-width-modulation (PWM) technique. Even an advanced geometric control is limited by its internal slew rate. The bandwidth can be made close to (even higher than) the switching frequency through converter augmentation; however, it requires a proper control algorithm and circuit arrangements. This paper considers methods of controlling both augmented buck and boost converters. An augmented boost converter topology is also proposed. The main switch is controlled through fixed-frequency PWM control, and augmented switches are controlled through a bang-bang control. The open-loop smallsignal analysis is carried out using a frequency domain approach. Minimum-time transient recovery is achieved using a finite set of augmented resistances and dynamically varying voltage hysteresis bands. It is possible to achieve null response in the sense of ripple band to the large-signal transient.
AB - The maximum closed-loop bandwidth of a dc-dc converter is restricted to a fraction of its switching frequency, while governed by a conventional pulse-width-modulation (PWM) technique. Even an advanced geometric control is limited by its internal slew rate. The bandwidth can be made close to (even higher than) the switching frequency through converter augmentation; however, it requires a proper control algorithm and circuit arrangements. This paper considers methods of controlling both augmented buck and boost converters. An augmented boost converter topology is also proposed. The main switch is controlled through fixed-frequency PWM control, and augmented switches are controlled through a bang-bang control. The open-loop smallsignal analysis is carried out using a frequency domain approach. Minimum-time transient recovery is achieved using a finite set of augmented resistances and dynamically varying voltage hysteresis bands. It is possible to achieve null response in the sense of ripple band to the large-signal transient.
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U2 - 10.1109/COMPEL.2010.5562366
DO - 10.1109/COMPEL.2010.5562366
M3 - Conference contribution
AN - SCOPUS:77958005082
SN - 9781424474639
T3 - 2010 IEEE 12th Workshop on Control and Modeling for Power Electronics, COMPEL 2010
BT - 2010 IEEE 12th Workshop on Control and Modeling for Power Electronics, COMPEL 2010
Y2 - 28 June 2010 through 30 June 2010
ER -