Design of approximate 2DOF digital controller for interleaved PFC boost converter

Adachi, Yuka; Mochizuki, Yohei; Higuchi, Kohji; Jirasereeamornkul, Kamon; Chamnongthai, Kosin

doi:10.1109/ieecon.2014.6925875

Cited by 2 publications

(2 citation statements)

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“…Compared with pole configuration [20], PID control, sliding mode control, optimal control, robust control is more adaptable and practical when the system has parameter uncertainty, robust control has therefore attracted widespread attention in the design of power electronic device controllers [17], [21], [22]. PID control is simple and effective, but it is very difficult to find the appropriate control coefficient value for a complex topology like NMDC [23]. Sliding mode control is highly robust, however, the chattering problem in sliding mode control is difficult to eliminate [24].…”

Section: Robust Controller Design Of Nmdcmentioning

confidence: 99%

“…Coupled with 80 linear matrix inequalities that satisfy the performance robustness of convex polyhedron, the entire optimization is composed of 208 linear matrix inequalities, that is, the robust control of NMDC is to find the minimum γ and the corresponding matrices W and Y that can satisfy 208 linear matrix inequalities. Calculated by MATLAB LMI toolbox, we get γ = 49.1089, and the corresponding feedback gain is show in (23). The input voltage at the beginning of the simulation is 60V, jumps to 80V at 1.5ms, and 60V at 2.5ms for robust control.…”

Section: Verificationmentioning

confidence: 99%

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Robustness Analysis and Controller Design Based on a Generalized Model of Nonisolated Multiphase DC–DC Converter

Yan

Zhan

et al. 2022

IEEE Access

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The nonisolated multiphase dc-dc converter (NMDC) has important research value and broad application prospect in fields such as smart grid and new energy vehicles because of its high power density and low output ripple. However, with the increase of the phase number, the parameter inconsistency among each phase will make the NMDC model quite complex. Moreover, parameter uncertainty and quadratic nonlinearity in the small-signal model can degrade control system performance, leading to a big challenge in controller design. In this paper, the generalized robust control model and the method of robust controller designing of NMDC concerning parameter uncertainty and quadratic nonlinearity is developed. Firstly, parameter uncertainty is described by convex polyhedra model. Secondly, the Lyapunov theorem is applied to solve the linear and quadratic nonliearity of the control model. Finally, with the method of Linear Matrix Inequality (LMI) region pole configuration, the analytical solution of the control model is achieved. Based on the proposed model, the independent control of NMDC with reduced sensors, including current sharing, flexible power distribution and robust control of the NMDC are realized. Both simulation and experimental results verify the effectiveness of the controller. Compared with traditional controller, the controller proposed in this paper can be stable in more complicated working conditions, and has a faster adjustment time, suitable for multiple topologies as well.INDEX TERMS nonisolated multiphase dc-dc converter (NMDC), parameter uncertainty, quadratic nonlinearity, convex polyhedron, robust control

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