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Automatically-directed power-switching circuit with output protection function

A power conversion circuit and output protection technology, applied in the direction of output power conversion devices, electrical components, etc., can solve the problems of low efficiency, high power consumption, poor reliability, etc., to achieve low cost, low power consumption, high power factor. Effect

Inactive Publication Date: 2014-06-11
XIAN ZHIHAI POWER TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The invention provides an automatic directional power conversion circuit with output protection, which mainly solves the problems of high power consumption, low efficiency and poor reliability of existing low-voltage new energy power converters

Method used

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  • Automatically-directed power-switching circuit with output protection function
  • Automatically-directed power-switching circuit with output protection function
  • Automatically-directed power-switching circuit with output protection function

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Embodiment Construction

[0024] The automatic directional power conversion circuit with output protection includes a reverse isolation circuit, the output end of the reverse isolation circuit is connected to the load through the energy storage filter circuit, and the input end of the reverse isolation circuit is connected to the output end of the VMOS switch circuit , the input end of the VMOS switch circuit is connected to the output end of the input power supply through the freewheeling inductance, the output end of the input power supply is connected to the input end of the width-adjustable pulse control circuit through the input current sampling circuit, and the output end of the energy storage filter circuit is passed through the output The current sampling circuit is connected to the input end of the width-adjustable pulse control circuit, the output end of the width-adjustable pulse control circuit is connected to the input end of the VMOS switch circuit through the drive signal synthesis circuit...

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Abstract

The invention provides an automatically-directed power-switching circuit with an output protection function. The automatically-directed power-switching circuit mainly solves the problems that an existing low-voltage new-energy power converter is high in power consumption, low in efficiency and poor in reliability, and comprises a reverse isolation circuit and an output protection circuit. The output end of the reverse isolation circuit is connected with a load through an energy storage filter circuit, the input end of the reverse isolation circuit is connected with the output end of a VMOS switch circuit, and the input end of the VMOS switch circuit is connected with the output end of an input power through a follow-current inductor; the reverse isolation circuit is composed of a VMOS tube group which is used for synchronous rectification with the VMOS switch circuit, and the VMOS tube group is synchronously driven by a drive signal synthesis circuit through a follow-current drive circuit; the output protection circuit can guarantee that the BOOST output can be automatically adjusted when short circuit of the load happens, current-limiting output is achieved, and low power consumption is also guaranteed.

Description

technical field [0001] The invention relates to a power conversion circuit. Background technique [0002] In recent years, photovoltaic power generation, wind power generation, battery power supply and other renewable new energy systems with AC low voltage and DC low voltage power supply have been widely used. It is imperative to improve the power supply efficiency, power supply quality and power supply reliability of low voltage new energy power supply systems. [0003] At present, the power conversion known in the art basically adopts: [0004] 1. AC (AC) input, using a full-wave rectifier to rectify the input AC (AC) power to DC (DC) power, and then convert DC / DC to DC (DC) output. This kind of scheme solves the conversion problem of higher input voltage AC power supply and low-power power supply. However, when low-voltage AC power input and high-power power conversion, because the voltage drop of the AC / DC rectifier circuit is relatively high, high power consumption is...

Claims

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Application Information

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IPC IPC(8): H02M1/088H02M1/32
Inventor 胡家培胡民海
Owner XIAN ZHIHAI POWER TECH
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