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High-performance VMOS switching control circuit

A switch control circuit and switch circuit technology, applied in the direction of electrical components, output power conversion devices, etc., can solve the problems of high power consumption, low efficiency, and poor reliability of converters, and achieve high conversion efficiency, low cost, and high power Factor effect

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-performance VMOS switch 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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  • High-performance VMOS switching control circuit
  • High-performance VMOS switching control circuit
  • High-performance VMOS switching control circuit

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Embodiment Construction

[0017] The high-performance VMOS switch control circuit includes an input power supply, the output end of the input power supply is respectively connected to the input end of the freewheeling inductor and the input end of the input current sampling circuit, and the output end of the freewheeling inductor is connected to the input end of the VMOS switch circuit. connected, the input end of the VMOS switch circuit is also connected to the output end of the control circuit, and the output end of the VMOS switch circuit is connected to the load through the reverse isolation circuit and the energy storage filter circuit in turn; the control circuit includes a width-adjustable pulse control circuit, Drive signal synthesis circuit, VMOS switch drive circuit and freewheeling voltage sampling circuit, the input end of the width-adjustable pulse control circuit is respectively connected with the output end of the input current sampling circuit and the output end of the output current samp...

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Abstract

The invention provides a high-performance VMOS switching control 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. An output current sampling circuit of the high-performance VMOS switching control circuit comprises a current sensor CS2, a capacitor C9 and a diode D5. The current sensor CS2 is connected with the diode D5 in series so that a branch circuit can be formed. The capacitor C9 is connected with the branch circuit in parallel. A reverse isolation circuit is composed of a VMOS transistor set which is synchronously rectified through a VMOS switching circuit and synchronously driven by a drive signal synthetic circuit through a follow current drive circuit. A capacitor is adopted in an energy storage filter circuit. The plus end of the capacitor is connected with the plus end of a load and the minus end of the capacitor is connected with the minus end of the load.

Description

technical field [0001] The invention relates to a high-performance VMOS switch 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 dro...

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
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