Control method for smooth switching of working modes of non-inverting Buck-Boost circuit

A technology of control method and working mode, which is applied in the direction of control/regulation system, electrical components, and adjustment of electrical variables, etc., can solve the problems of poor control performance and non-linear characteristics of NIBB circuits, etc., achieve good performance, reduce the degree of oscillation, The effect of improving dynamic performance

Active Publication Date: 2020-02-07
TSINGHUA UNIV
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Problems solved by technology

[0012] The present invention provides a control method for a non-reverse Buck-Boost circuit to solve the problem of poor control performance when the operating mode is switched without considering the nonlinear characteristics of the NIBB circuit in the prior art. The control method includes the following aspects steps:

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  • Control method for smooth switching of working modes of non-inverting Buck-Boost circuit
  • Control method for smooth switching of working modes of non-inverting Buck-Boost circuit
  • Control method for smooth switching of working modes of non-inverting Buck-Boost circuit

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Embodiment Construction

[0029] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0030] Such as figure 1 The topological structure diagram of the NIBB circuit is shown, the circuit topology is formed by connecting a set of Buck bridge arms at the input end and a set of Boost bridge arms at the output end through an inductor L, and the circuit has a filter at the input end and output end capacitance. figure 2 The structure diagram of the control system of the control method for the smooth switching of the NIBB circuit working mode proposed by the present invention is shown. Below to fi...

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Abstract

The invention discloses a control method for smooth switching of working modes of a non-inverting Buck-Boost circuit. The control method comprises the steps that a working mode which should be adoptedby a circuit at present is determined according to an output voltage instruction value, an input voltage measurement value and a control period mode on the circuit; an automatic voltage regulation module is designed according to a mathematical model and mode switching characteristics of a non-inverting Buck-Boost circuit and can compensate an inductive current instruction value during working mode switching; and an automatic inductive current adjusting module is designed according to the mathematical model of the non-inverting Buck-Boost circuit. In this way, smooth switching of the working modes of the NIBB (non-inverting Buck-Boost converter) circuit can be achieved through adoption of the control method.

Description

technical field [0001] The invention relates to the technical field of DC-DC converter control, in particular to a mode smooth switching control strategy of a non-reverse Buck-Boost converter. Background technique [0002] The non-inverting Buck-Boost converter (NIBB) is a non-isolated DC-DC converter that can realize both step-up conversion and step-down conversion. It has been widely used in recent years Photovoltaic power generation grid-connected system, electric vehicle charging system, fuel cell grid-connected system, uninterruptible power supply system, low-power power supply, power factor correction converter and other applications. Compared with traditional Buck-Boost converter and The input and output voltage polarity of the non-inverting Buck-Boost converter is the same, which makes the auxiliary power supply and drive circuit system of the NIBB converter simpler; compared with the Zeta converter and Sepic converter, the NIBB converter uses The number of passiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/158
CPCH02M3/1582
Inventor 翁幸赵争鸣陈凯楠袁立强
Owner TSINGHUA UNIV
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