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Adaptive Photovoltaic Inverter

A photovoltaic inverter, self-adaptive technology, applied in photovoltaic power generation, conversion of irreversible DC power input to AC power output, output power conversion device, etc., can solve the problem that the inverter cannot be started, the inverter is permanently Damage, internal device burnout and other problems, to meet the requirements of high-efficiency performance indicators, reduce the probability of damage, and reduce the difficulty of use

Active Publication Date: 2018-01-09
BAODING JIASHENG PHOTOVOLTAIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the inverters on the market are fixed-input inverters, that is, the input voltage is a fixed voltage level. If the input voltage is too low, the inverter will not start, and if the input voltage is too high, it may burn the inverter or even cause inverter failure. In addition, the polarity of the input voltage must be connected correctly. If the polarity is reversed, the internal devices will be burned. After a fault occurs, professionals need to open the case for maintenance, which is very difficult to operate.
As for the measures to prevent polarity reverse connection, most of the insurance protection is used at present, that is, a fuse device is connected between the inverter input terminal and the inverter module. If the input voltage polarity is reversed, the fuse device will be burned to prevent damage to the inverter The internal period of the inverter is damaged; when the fuse is burned out, it will be necessary to open the case to replace the fuse, which will affect the use of the inverter

Method used

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Embodiment Construction

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] An adaptive photovoltaic inverter, its structure is as follows figure 1 As shown, it includes input terminal, polarity automatic identification circuit, inverter module, output voltage adjustable circuit and AC output terminal; polarity automatic identification circuit is connected between input terminal terminal and inverter module for Identify the polarity of the input terminal and be able to automatically switch to the polarity that is consistent with the input polarity of the inverter module; the output voltage adjustable circuit is connected between the inverter module and the output terminal to automatically control the stable output of the AC voltage.

[0019] The circuit diagram of the polarity automatic identification circuit is as follows: figure 2 As shown, it includes four field effect transistors Q1~Q4 connected ...

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Abstract

The invention discloses an adaptive photovoltaic inverter, which comprises an inverter module, an input terminal and an output terminal, and a device for identifying the input terminal is arranged between the input terminal and the inverter module of the inverter. polarity and can automatically switch the polarity to an automatic polarity identification circuit consistent with the polarity requirements of the inverter module. The invention can realize the automatic identification and control of the input voltage level and polarity, greatly reduces the difficulty of using the inverter equipment, and reduces the probability of damage due to misoperation.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to an inverter. Background technique [0002] An inverter is a device that converts DC power (battery, storage battery) into AC power (generally 220V, 50Hz sine wave). At present, the inverters on the market are fixed-input inverters, that is, the input voltage is a fixed voltage level. If the input voltage is too low, the inverter will not start, and if the input voltage is too high, it may burn the inverter or even cause inverter failure. In addition, the polarity of the input voltage must be connected correctly. If the polarity is reversed, the internal devices will be burned. After a fault occurs, professionals need to open the case for maintenance, which is difficult to operate. As for the measures to prevent polarity reverse connection, most of the insurance protection is used at present, that is, a fuse device is connected between the inverter input terminal and th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/44H02M1/32
CPCY02E10/56
Inventor 苏红月代松靳玲陈敬欣
Owner BAODING JIASHENG PHOTOVOLTAIC TECH
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