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本系统以直流电流源为核心,AT89S52单片机为主控制器,通过键盘来设置直流电源的输出电流,设置步进等级可达1mA,并可由数码管显示实际输出电流值和电流设定值。本系统由单片机程控输出数字信号,经过D/A转换器(AD7543)输出模拟量,再经过运算放大器隔离放大,控制输出功率管的基极,随着功率管基极电压的变化而输出不同的电流。单片机系统还兼顾对恒流源进行实时监控,输出电流经过电流/电压转变后,通过A/D转换芯片,实时把模拟量转化为数据量,再经单片机分析处理, 通过数据形式的反馈环节,使电流更加稳定
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用变压器+整流桥+滤波器+稳压器构成5v的直流电源,以此作为D/A转换器(DAC0832)的基准电压,用AT89C51+8155+键盘+LED的单片机小系统控制进入DAC0832的数字量达到数控的目的 -transformer rectifier bridge filter Regulators constitute 5v DC power supply, as D / A converters (DAC0832) voltage, AT89C51 8155 with the keyboard
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本系统是以凌阳SPCE061A单片机为核心控制器,具有电流可预置、可步进调整、输出的电流信号和预置的电流信号可同时显示的数控直流电流源。系统主要包括:凌阳SPCE061A精简开发板、键盘与显示电路、压控恒流源电路、校正电路、电源电路等。系统中通过键盘按键对电流值进行预置,凌阳SPCE061A单片机送出相应的数字信号,经过D/A转换、信号放大、电平转换、压控恒流源,再输出所需电流;实际输出的电流经过精密电阻变成取样电压信号,经高输入阻抗放大器、A/D转换器,将信号反馈到凌阳SPCE061A单片机中
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实现光伏系统最大功率追踪
适用于DC-DC变换器,本设计是使用扰动观察法最大功率追踪-PV system to achieve maximum power tracking for DC-DC converters, this design is the use of perturbation and observation method MPPT
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MATHEMATICAL MODELS OF DC-DC CONVERTERS
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The FPGA can realize a more optimized Digital controller in DC/DC Converters when compare to DSPs. In this paper, based on the FPGA platform, The theoretical analysis, characteristics, simulation and design consideration are given. The methods to imp
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设计并制作一个电能收集充电器,充电器及测试原理示意图如图1。该充电器的核心为直流电源变换器,它从一直流电源中吸收电能,以尽可能大的电流充入一个可充电池。-Design and production of electrical energy to collect a charger, charger and test schematic diagram of Figure 1. The core of the charger DC power converters, which flows fro
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该THS5651是一个10位分辨率的数字到模拟转换器(DAC),专为优化数字数据
传输有线和无线通信系统。 10位DAC是一个CommsDAC成员
高速,低功耗CMOS数字系列模拟转换器。该CommsDAC系列由管脚
兼容的14 - ,12 - ,10 - ,和8位DAC。所有设备提供相同的接口选择,小外形封装和
引脚。该THS5651提供优越的AC和DC性能,同时支持更新率高达100 MSPS的。-The THS5651 is a 10-bit resolution digit
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this about ac to dc converters-this is about ac to dc converters
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Analysis of steady state/ transient behaviour of HVDC systems due to AC/ DC Faults, commutation failure etc. using PSCAD simulating software. Also conducted studies on control methods/ protection requirements as well as distribution on the Delhi-Riha
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采用TI公司的DSP,实现逆变并网DC/AC变换器,采用数字控制。本文档主要为对应的程序说明和测试报告。-Using TI' s DSP, achieve grid inverter DC/AC converters, digital control. This document is intended to correspond to the descr iption of the procedures and test reports.
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The amplitude and phase angle of the converter ac output voltage can be controlled simultaneously to achieve rapid and independent control of active and reactive power in all four quadrants. The control of active and reactive power is bidirectional a
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