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A flyback micro-inverter analog control circuit and peak current control method

A micro-inverter, analog control technology, applied in circuit devices, AC network circuits, control/regulation systems, etc., can solve the problems of limiting the application of micro-inverters, difficult integration of digital control, and high control costs, reducing control. Cost and complexity, low cost, simple control effect

Active Publication Date: 2022-04-12
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the flyback micro-inverter control mainly adopts digital control technology based on DSP or FPGA digital controller, but digital control has disadvantages such as difficult integration, high control cost, and poor real-time performance, which limits the wider application of micro-inverters. application

Method used

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  • A flyback micro-inverter analog control circuit and peak current control method
  • A flyback micro-inverter analog control circuit and peak current control method
  • A flyback micro-inverter analog control circuit and peak current control method

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Embodiment Construction

[0028] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0029] figure 1 It is the schematic diagram of the analog control circuit of the flyback micro-inverter, which mainly includes the main power circuit, that is, a photovoltaic panel, a flyback converter, a full-bridge power frequency inverter circuit, and a C-L output filter; the control circuit includes the largest Power point tracking analog control circuit, grid phase-lock circuit and main power switch tube drive control analog circuit.

[0030] figure 2 It is the main waveform diagram of the flyback micro-inverter. In the present invention, the flyback converter is controlled by the peak current of the primary side, and works in the inductor current discontinuous mode.

[0031] When the flyback converter is controlled by the peak current of the primary side and works in the inductor current discontinuous mode, the peak current of the primary sid...

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Abstract

The invention relates to the technical field of power electronics application, and aims to provide an analog control circuit and a peak current control method of a flyback micro-inverter. The analog control circuit includes a maximum power point tracking analog control circuit, a grid phase-locked circuit and a main power switch tube drive control analog circuit. Sinusoidal function; the flyback converter works in the inductor current discontinuous mode, and adopts the peak current control of the primary side. Compared with the prior art, the analog control of the present invention can effectively reduce the control cost and complexity of the micro-inverter, and has the advantages of easy integration, simple control, and low cost. In addition, the analog control technology of the present invention lays the foundation for the further development of a dedicated integrated control chip for the flyback micro-inverter, which is beneficial to reduce the cost of the micro-inverter.

Description

technical field [0001] The invention belongs to the technical field of power electronics application and relates to the control field of micro-inverters. The present invention is a flyback micro-inverter analog control circuit based on peak current control, which can effectively reduce the control cost and complexity of the micro-inverter, further promote the development of integrated control chips for flyback micro-inverters, and help reduce micro-inverter inverse cost. Background technique [0002] With the reduction of traditional fossil energy reserves and the increasing difficulty of mining, and the reduction of the application cost of various renewable energy sources, human beings have generally increased the research and application of renewable energy. Among them, solar energy has become a hot spot in the application research of renewable energy due to its advantages such as wide distribution, easy access, zero emission, and sustainability. For solar photovoltaic p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/162H02M1/06H02M3/335H02J3/38
CPCH02M7/162H02M1/06H02M3/335H02J3/381H02J2300/26Y02E10/56
Inventor 陈敏傅钰泰郑睿瑞齐继志韩放
Owner ZHEJIANG UNIV
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