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http://dx.doi.org/10.6113/JPE.2016.16.3.1025

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

Li, Xutao (Graduate School of Information, Production and Systems, Waseda University)
Chen, Minjie (Graduate School of Information, Production and Systems, Waseda University)
Shinohara, Hirofumi (Graduate School of Information, Production and Systems, Waseda University)
Yoshihara, Tsutomu (Graduate School of Information, Production and Systems, Waseda University)
Publication Information
Journal of Power Electronics / v.16, no.3, 2016 , pp. 1025-1035 More about this Journal
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.
Keywords
Boost converter; Closed-loop characteristics; Low order; Robust H∞ control; Sensorless;
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