Safe output-current-limiting automatic polarity identification directional power switching circuit
A power conversion circuit and polarity identification technology, applied in the direction of output power conversion devices, electrical components, etc., can solve the problems of poor reliability, high power consumption, low efficiency, etc., and achieve high power factor, low power consumption, and low cost. Effect
Active Publication Date: 2015-01-21
XIAN ZHIHAI POWER TECH
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[0008] The invention provides an automatic polarity recognition directional power conversion circuit with safe current limiting output, which mainly solves the problems of high power consumption, low efficiency and poor reliability of existing low-voltage new energy power converters
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[0033] The automatic polarity recognition directional power conversion circuit of the safety current limiting output includes a load, and the input end of the load is sequentially connected to the output end of the input power supply through an energy storage filter circuit, a reverse isolation circuit, a VMOS switch circuit, and a freewheeling inductor ; The output end of the energy storage filter circuit is connected to the input end of the output current sampling circuit and the width-adjustable pulse control circuit, and the output end of the input power supply is connected to the input end of the input current sampling circuit and 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 and the VMOS switch drive circuit in turn, and the input end of the drive signal synthesis circuit is connected to the output end of the VMOS s...
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The invention relates to a safe output-current-limiting automatic polarity identification directional power switching circuit which mainly solves the problems of high power consumption, low efficiency and poor reliability of an existing low-voltage new-energy power inverter. The input end of a load of the power switching circuit is connected with the output end of an input power supply through an output protection circuit, an energy storage filter circuit, a reverse isolation circuit, a VMOS (V-groove metal oxide semiconductor) control circuit and a follow current inductor sequentially, the output end of the energy storage filter circuit is connected with the input end of a width modulation type pulse control circuit through an output current sampling circuit, and the width modulation type pulse control circuit, a drive signal synthesis circuit, a VMOS switch drive circuit and a follow current voltage sampling circuit form a control circuit. The output protection circuit can enable a BOOST output to be automatically regulated when the load is in short circuit, has an output current liming function, and keeps low power consumption at the same time.
Description
technical field [0001] The invention relates to a power conversion circuit with safe current-limited output. 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 relativel...
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IPC IPC(8): H02M1/088H02M1/32
Inventor 胡家培胡民海
Owner XIAN ZHIHAI POWER TECH