Highly-stable wideband input power change-over circuit

A technology of input power supply and conversion circuit, applied in the direction of output power conversion device, electrical components, etc., can solve the problems of poor reliability, high power consumption, low efficiency, etc., and achieve the effect of high power factor, low power consumption, and low cost

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

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Problems solved by technology

[0008] The invention provides a high-stable broadband input power conversion circuit, which mainly solves the proble

Method used

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  • Highly-stable wideband input power change-over circuit
  • Highly-stable wideband input power change-over circuit
  • Highly-stable wideband input power change-over circuit

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Embodiment Construction

[0021] The high-stable broadband input power conversion circuit includes a VMOS switch circuit and a width-adjustable pulse control circuit. The input end of the VMOS switch circuit is connected to the output end of the input power supply through a freewheeling inductor, and the output end of the VMOS switch circuit passes through a reverse isolation circuit in turn. . The energy storage filter circuit is connected to the load, and the input end of the VMOS switch circuit is also connected to the output end of the VMOS switch drive circuit.

[0022] The output end of the width-adjustable pulse control circuit is connected to the input end of the VMOS switch drive circuit through the drive signal synthesis circuit, the input end of the width-adjustable pulse control circuit is connected to the output end of the input power supply through the input current sampling circuit, and the drive signal synthesis circuit The input end of the input end is also connected with the output end...

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PUM

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Abstract

The invention provides a highly-stable wideband input power change-over circuit which 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. The highly-stable wideband input power change-over circuit comprises a VMOS switching circuit, a width modulation pulse control circuit and an output protection circuit. The input end of the VMOS switching circuit is connected with the output end of an input power source through a follow current inductor and the output end of the VMOS switching circuit is connected with a load through a reverse isolation circuit and an energy storage filter circuit in sequence. The input end of the VMOS switching circuit is further connected with the output end of a VMOS switching drive circuit. An input current sampling circuit comprises a current sensor CS1, a capacitor C13, a resistor R21 and a diode D4. The output protection circuit can guarantee that BOOST output can be automatically adjusted when the load is in a short circuit, output current is limited, and meanwhile low power consumption is 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): H02M1/08H02M1/32
Inventor 胡家培胡民海
Owner XIAN ZHIHAI POWER TECH
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