Design of a Low-Order Sensorless Controller by Robust H∞ Control for Boost Converters

Xutao Li; Minjie Chen; Hirofumi Shinohara; Tsutomu Yoshihara

Design of a Low-Order Sensorless Controller by Robust H∞ Control for Boost Converters

Vol. 16, No. 3, pp. 1025-1035, May 2016

10.6113/JPE.2016.16.3.1025

Boost converter

Closed-loop characteristics

Low order

Robust H∞ control

Sensorless

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Abstract

Luenberger observer (LO)-based sensorless multi-loop control of a converter requires an iterative trial-and-error design process, considering that many parameters should be determined, and loop gains are indirectly related to the closed-loop characteristics. Robust H∞ control adopts a compact sensorless controller. The algebraic Riccati equation (ARE)-based and linear matrix inequality (LMI)-based H∞ approaches need an exhaustive procedure, particularly for a low-order controller. Therefore, in this study, a novel robust H∞ synthesis approach is proposed to design a low-order sensorless controller for boost converters, which need not solve any ARE or LMI, and to parameterize the controller by an adjustable parameter behaving like a “knob” on the closed-loop characteristics. Simulation results show the straightforward closed-loop characteristics evaluation and better dynamic performance by the proposed H∞ approach, compared with the LO-based sensorless multi-loop control. Practical experiments on a digital processor confirmed the simulation results.

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Cite this article

[IEEE Style]

X. Li, M. Chen, H. Shinohara, T. Yoshihara, "Design of a Low-Order Sensorless Controller by Robust H∞ Control for Boost Converters," Journal of Power Electronics, vol. 16, no. 3, pp. 1025-1035, 2016. DOI: 10.6113/JPE.2016.16.3.1025.

[ACM Style]

Xutao Li, Minjie Chen, Hirofumi Shinohara, and Tsutomu Yoshihara. 2016. Design of a Low-Order Sensorless Controller by Robust H∞ Control for Boost Converters. Journal of Power Electronics, 16, 3, (2016), 1025-1035. DOI: 10.6113/JPE.2016.16.3.1025.