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Boost conversion circuit, solar inverter and control method thereof

A technology of transforming circuits and transformers, which is applied in the electrical field and can solve problems such as absorption circuit losses

Inactive Publication Date: 2012-05-02
LEADSOLAR ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the disadvantage of this method is that the snubber circuit introduces additional losses

Method used

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  • Boost conversion circuit, solar inverter and control method thereof
  • Boost conversion circuit, solar inverter and control method thereof
  • Boost conversion circuit, solar inverter and control method thereof

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Embodiment Construction

[0037] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0038] A boost conversion circuit, including a clamping circuit, a transformer and an output circuit, the clamping circuit is connected to the primary side of the transformer, the output circuit is connected to the secondary side of the transformer, and two diodes are connected to the primary side B node of the transformer and diode or connect two controllable switches, diode The cathode is connected to the B node, and its anode is connected to the capacitor of the clamp circuit on, diode The anode is connected to the B node, and its cathode is connected to the capacitor of the clamp circuit superior. Clamping circuits can be divided into high-side clampin...

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Abstract

The invention discloses a boost conversion circuit, comprising a clamping circuit, a transformer and an output circuit, wherein the clamping circuit is connected with a primary side of the transformer, and the output circuit is connected with a secondary side of the transformer. The boost conversion circuit is characterized in that a node B at the primary side of the transformer is connected with two diodes DS1 and DS2, a cathode of the diode DS1 is connected with the node B, an anode of the diode DS1 is connected onto a capacitor of the clamping circuit, the anode of the diode DS2 is connected with the node B, and the cathode of the diode DS2 is connected onto the capacitor of the clamping circuit. The two diodes are connected with the node B at the primary side of the transformer, and the aim of inhibiting high-frequency oscillation generated by a primary circuit is achieved by conducting and closing the diodes. The DS1 and DS2 realize clamping action, and currents passing through the DS1 and DS2 are low, thus the diodes with lower current capacity can be selected, and no loss can be produced while steady state performance characteristic of the original flyback converter is not influenced.

Description

technical field [0001] The invention relates to the electrical field, in particular to a boost conversion circuit and a solar inverter for solar power generation. Background technique [0002] In recent years, renewable energy power generation systems based on wind energy and solar energy have been used more and more in the world. For solar grid-connected power generation systems, in addition to the centralized high-power solar power plants that currently dominate the mainstream, distributed solar grid-connected power generation systems can improve the annual power generation of the system in most cases because they can optimize the working status of solar panels. At present, it has been paid more and more attention and has become a research hotspot. Among them, the distributed generation system based on solar micro-inverter is particularly attractive and widely used in the United States. The core of the solar micro-inverter is a high-efficiency boost circuit, an inverter ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H02M7/5387H02J3/38
Inventor 梁志刚郑崇峰
Owner LEADSOLAR ENERGY