A Novel Scheme for Sliding-Mode Control of DC-DC Converters with a Constant Frequency Based on the Averaging Model

Yiwen He; Weisheng Xu; Yan Cheng

A Novel Scheme for Sliding-Mode Control of DC-DC Converters with a Constant Frequency Based on the Averaging Model

Yiwen He

Weisheng Xu

Yan Cheng

Vol. 10, No. 1, pp. 1-8, Dec. 2009

10.6113/JPE.2010.10.1.1

DC-DC converter

Sliding mode control

Constant switching frequency

Averaging model

Reaching law

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Abstract

A new scheme for sliding-mode control (SMC) of DC-DC converters with a constant switching frequency is proposed. The scheme is based on the averaging model and the output signal of the controller is d+ or d- instead of the on or off signal of a direct sliding-mode (SM) controller or the continuous signal d = ueq of an indirect SM controller. Two approaches using the new scheme are also proposed and the design procedures for a buck converter are given in detail. The first approach called constant d+ and d- SMC is simple, cost effective and dynamically fast. In order to improve the dynamic characteristics of the reaching phase and to alleviate chattering, the second approach called reaching law SMC is also presented. Analyses and simulation results demonstrate the feasibility of the proposed scheme.

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Cite this article

[IEEE Style]

Y. He, W. Xu, Y. Cheng, "A Novel Scheme for Sliding-Mode Control of DC-DC Converters with a Constant Frequency Based on the Averaging Model," Journal of Power Electronics, vol. 10, no. 1, pp. 1-8, 2010. DOI: 10.6113/JPE.2010.10.1.1.

[ACM Style]

Yiwen He, Weisheng Xu, and Yan Cheng. 2010. A Novel Scheme for Sliding-Mode Control of DC-DC Converters with a Constant Frequency Based on the Averaging Model. Journal of Power Electronics, 10, 1, (2010), 1-8. DOI: 10.6113/JPE.2010.10.1.1.