Topological structure with current independent control function

A technology of independent control and topology structure, applied in the field of power electronics, can solve the problems of complex switching sequence, difficult to achieve modularization and cascading, etc., to achieve the effect of high security and high stability

Inactive Publication Date: 2020-02-14
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, complex switching sequences are required, and cross-coupling between modules needs to be considered in particular
In addition, compared with the "one module one converter" structure, although the number of components is reduced, it is difficult for this structure to meet the requirements of modularization and cascading

Method used

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  • Topological structure with current independent control function
  • Topological structure with current independent control function
  • Topological structure with current independent control function

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Embodiment

[0042] Such as figure 1 As shown, the overall structure of the independent current control topology with N modules is given. The structure consists of multiple modules, each driving a string of LEDs. Each module is driven by a half-bridge resonant converter, and the current is balanced by the principle of capacitor balancing. All module inputs and outputs of this structure are isolated by capacitors. Each module has four nodes A k , B k , C k and D k (k=1, 2, . . . , N) are used to connect with external circuits. Either module includes capacitor C 1,k , capacitance C 2,k , Diode D 1,k , Diode D 2,k , inductance L k and switch tube S k , capacitance C 1,k Connect one end of the capacitor C 2,k , capacitance C 1,k The other end of the series inductor L k After connecting to the switch tube S k the drain, the capacitor C 2,k The other end is connected to the switch tube S k source, the diode D 2,k The positive end of the switch tube S is connected k source, t...

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Abstract

The invention provides a topological structure with a current independent control function. The structure is composed of a plurality of modules, wherein each module drives one LED string, and input and output are isolated through a capacitor, current equalization is carried out among the modules through a capacitive current equalization principle, and the input of each module is provided by a half-bridge resonant converter. Compared with a single-inductor multi-output SIMO (Single-Inductor-Multi-Output) structure, structure modules are completely independent from each other, and a problem of cross coupling is avoided; each module in the structure can be turned on and turned off at will, and is not restricted by other modules; under an extreme condition, all the modules are completely switched off, and the main circuit can still operate normally.

Description

technical field [0001] The invention relates to the field of power electronics, in particular to a topological structure with independent current control. Background technique [0002] Color can affect people's mood and change the atmosphere of the scene. Using the color mixing theory, by controlling the luminous flux ratio of different colors, the color coordinates of any point in the area surrounded by the source color can be obtained. At present, common color mixing channels include RGB (red-green-blue), RGBA (red-green-blue-amber), RGBAW (red-green-blue-amber-white) and so on. Color mixing needs to control the luminous flux output of each channel, so the color mixing system often needs to adopt a topology with independent current control capability. [0003] The most simple and intuitive independent current control structure is that each module corresponds to a converter, such as Buck, Boost and Buck-Boost converters and so on. The inputs of these converters share the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B45/20H05B45/345
CPCY02B20/30
Inventor 张瑞宏
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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