Modified Digital Pulse Width Modulator for Power Converters with a Reduced Modulation Delay

This paper presents a digital pulse width modulator (DPWM) with a reduced digital modulation delay (a transport delay of the modulator) during the transient response of power converters. During the transient response operation of a power converter, as a result of dynamic variations such as load step-up or step-down, the closed loop controller will continuously adjust the duty cycle in order to regulate the output voltage. The larger the modulation delays, the larger the undesired output voltage deviation from the reference point. The three conventional DPWM techniques exhibit significant leading-edge and/or trailing-edge modulation delays. The DPWM technique proposed in this paper, which results in modulation delay reductions, is discussed, experimentally tested and compared with conventional modulation techniques.

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Cite this article

[IEEE Style]

J. A. Qahouq, V. Arikatla, T. Arunachalam, "Modified Digital Pulse Width Modulator for Power Converters with a Reduced Modulation Delay," Journal of Power Electronics, vol. 12, no. 1, pp. 98-103, 2012. DOI: 10.6113/JPE.2012.12.1.98.

[ACM Style]

Jaber Abu Qahouq, VaraPrasad Arikatla, and Thanukamalam Arunachalam. 2012. Modified Digital Pulse Width Modulator for Power Converters with a Reduced Modulation Delay. Journal of Power Electronics, 12, 1, (2012), 98-103. DOI: 10.6113/JPE.2012.12.1.98.