Self-protection conversion circuit of input power supply with undifferentiated output

A technology of input power supply and conversion circuit, applied in the field of power conversion circuit, can solve the problems of low efficiency, poor reliability and high power consumption, and achieve the effect of low cost, high power factor and low power consumption

Inactive Publication Date: 2013-03-20
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 self-protection conversion circuit with no difference in input power output, 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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  • Self-protection conversion circuit of input power supply with undifferentiated output
  • Self-protection conversion circuit of input power supply with undifferentiated output
  • Self-protection conversion circuit of input power supply with undifferentiated output

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Embodiment Construction

[0030] The input power supply has no differential output self-protection conversion circuit, including the input power supply, the output terminal of the input power supply is respectively connected with the input terminal of the freewheeling inductor and the input terminal of the input current sampling circuit, and the output terminal of the freewheeling inductor is connected with the VMOS switch circuit 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 out...

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Abstract

The invention provides a self-protection conversion circuit of an input power supply with undifferentiated output, which mainly solves the problems of high power consumption, low efficiency and poor reliability of the existing low-voltage new-energy power converter. A control circuit in the conversion circuit adopts a current mode PWM (Pulse Width Modulation) controller, two output ends Ao and Bo of the PWM controller are respectively connected to a group of input ends of a driving signal synthesis circuit, an input current sampling circuit comprises a current sensor CS1, a capacitor C13, a resistor R21 and a diode D4, wherein the current sensor CS1 and the diode D4 are connected in series to form a branch; the capacitor C13 and the resistor R21 are respectively connected to the branch in parallel; and an output protection circuit is arranged before a load.

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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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/088H02M1/32
Inventor 胡家培胡民海
Owner XIAN ZHIHAI POWER TECH
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