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Freewheeling voltage collecting and controlling circuit

A technology for controlling circuits and circuits, applied to electrical components, output power conversion devices, etc., can solve problems such as low efficiency, poor reliability, and high power consumption, and achieve the effects of low cost, high power factor, and high power density

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

AI Technical Summary

Problems solved by technology

[0008] The invention provides a freewheeling voltage acquisition control circuit, 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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  • Freewheeling voltage collecting and controlling circuit
  • Freewheeling voltage collecting and controlling circuit
  • Freewheeling voltage collecting and controlling circuit

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Embodiment Construction

[0017] The freewheeling voltage acquisition control circuit includes an input current sampling circuit and an output current sampling circuit, the input end of the input current sampling circuit is connected to the output end of the input power supply, the input end of the output current sampling circuit is connected to the input end of the load, The output ends of the input current sampling circuit and the output current sampling circuit are connected to the input end of the VMOS switch circuit through the width-adjustable pulse control circuit, the drive signal synthesis circuit, the VMOS switch drive circuit, and the input end of the VMOS switch circuit is also passed through The freewheeling inductor is connected to the output terminal of the input power supply, and the output terminal of the VMOS switch circuit is connected through the reverse isolation circuit, the energy storage filter circuit and the load in turn; the output terminal of the VMOS switch circuit is also co...

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Abstract

The invention provides a freewheeling voltage collecting and controlling circuit which mainly solves the problems that an existing low-voltage new-energy power inverter is high in power consumption, low in efficiency and poor in reliability. The freewheeling voltage collecting and controlling circuit comprises an input current sampling circuit and an output current sampling circuit. The input end of a VMOS switching circuit is connected with the output end of an input power supply through a freewheeling inductor. The output end of the VMOS switching circuit is connected with a load sequentially through a reverse isolation circuit and an energy storage filter circuit and further connected with the input end of a drive signal synthesis circuit through a freewheeling voltage sampling circuit. A control circuit is formed by a width modulation type pulse control circuit, the drive signal synthesis circuit, a VMOS switch drive circuit and the freewheeling voltage sampling circuit.

Description

technical field [0001] The invention relates to a freewheeling voltage acquisition control circuit, which belongs to the technical field of power conversion. 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/088
Inventor 胡家培胡民海
Owner XIAN ZHIHAI POWER TECH