Multi-phase DCDC robust controller design method

A technology of robust controller and design method, applied in adaptive control, general control system, control/regulation system, etc., can solve the problems of numerous devices, difficulty in accurate modeling, complex structure, etc., to increase stability and reliability performance, to achieve the effect of current sharing control

Active Publication Date: 2021-06-15
TONGJI UNIV
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Problems solved by technology

[0003] Although the multi-phase DC-DC converter has the characteristics of high power, high power density, flexible control and high reliability, its structure is complex and there are many devices, and due to the problems of circuit stray parameters and phase asymmetry, it is difficult to accurately model very difficult
Moreover, the parameter uncertainty and quadratic no

Method used

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  • Multi-phase DCDC robust controller design method
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  • Multi-phase DCDC robust controller design method

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Embodiment Construction

[0045] Below in conjunction with accompanying drawing and specific embodiment the technical scheme of the present invention is described in detail:

[0046] The steps of the technical solution of the present invention are as follows, as attached figure 1 Shown:

[0047] Step 1: Build a dynamic small-signal model with quadratic nonlinear components

[0048] The main circuit topology used in the model is as follows figure 2 As shown, the entire circuit contains M groups of coupled inductors, and each group of coupled inductors is composed of N mutually coupled inductors. Each phase inductor constitutes a boost circuit. By changing the number of mutual inductances and phases, it can evolve into a single-phase, magnetically integrated multi-phase circuit. There are many DCDC converter structures with multiple phases and coupled inductors.

[0049] The derivation process of the dynamic small-signal model containing quadratic nonlinear components is as follows:

[0050] Accord...

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Abstract

The invention relates to a multi-phase DCDC controller design method. The method is based on a generalized multi-phase DCDC boost converter model, adopts independent control modes of all groups, comprehensively analyzes parameter uncertainty, system interference input and quadratic nonlinearity of a linear model, and establishes a robust control model of a multi-phase boost converter. The model is suitable for various circuit topologies such as single-phase boost, typical magnetic integration multi-phase boost and coupling inductance multi-phase boost, fully considers parameter uncertainty, interference input and quadratic nonlinearity, and has very high applicability and good robust stability and robust performance. A robust controller designed through the method has the advantages of being good in stability and insensitive to bounded uncertainty and interference, the system stability and transient performance requirements of a large-power multi-phase DCDC converter in a wide working range are met, and the design problem of a multi-phase staggered DCDC controller is solved.

Description

technical field [0001] The invention relates to a design method of a multiphase DCDC controller, which can be used in the field of power electronic equipment. Background technique [0002] The multi-phase DC-DC converter adopts a multi-phase parallel topology and uses multiple groups of devices to achieve the design goal. While breaking through the power limit of a single device, it also effectively reduces the demand for capacitance and inductance, thereby improving power density. . In addition, lower output ripple, more controllable objects and design margins improve the control flexibility and working reliability of the DC converter. [0003] Although the multi-phase DC-DC converter has the characteristics of high power, high power density, flexible control and high reliability, its structure is complex and there are many devices, and due to the problems of circuit stray parameters and phase asymmetry, it is difficult to accurately model very difficult. Moreover, the p...

Claims

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Application Information

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IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 韦莉严文
Owner TONGJI UNIV
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