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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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介绍了一种闭环智能数控直流电流源的设计原理和实施方案,该方案采用自行设计制作的高精度电压源,利用单片机、PWM和运算放大器构成A/DD/A转换器来控制场效应管导通状态的原理,达到了输出恒流的目的。整个系统采用89C58单片机作为主控部件,将预置电流值数据送入D/A转换器,经硬件电路变换为恒定的直流输出,同时使用采样电阻将实际输出电流转换成电压送入A/D转换器,并将其反馈到单片机中构成闭环系统,进而实现预设值和实际值的比较,再通过调整D /A转换器输出的电压来改变场效应管的导通状态,减小了实际值与
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本设计以AT89S52为核心,通过A/D、D/A转换、V/I转换及独特的算法实现了高精度的,电流输出范围为20mA~2000mA的数控直流电流源。该电流源具有电流可预置,1mA步进,同时显示给定值和实测值等功能。-The design AT89S52 as the core, through the A/D, D/A converter, V/I conversion and a unique high-precision algorithm, the current output range
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DSTSTCOM DESIGN , USING CURRENT SOURCE CONVERTER IN MATLAB
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数控直流稳压电源+毕业设计本文将介绍一种数控直流稳压电源,本电源由模拟电源、显示电路、控制电路、数模转换电路、放大电路五部分组成。准确说就是模拟电源提供各个芯片电源、数码管、放大器所需电压;显示电路用于显示电源输出电压的大小。数控直流电流源能够很好地降低因元器件老化等原因造成的输出误差,最大输出电流2A,最高输出电压30V,电流、电压都具有步进为0.1-Numerical control dc manostat+ graduation designWith the development of
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采用1m399精准稳压,采用tl2541ad转换实现了数控恒流源-Precision regulator with 1m399, using the NC tl2541ad achieve constant current source converter
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SDA7123是一个三路高速、数模转换器的单片集成电路。它包括三路高速、 10位输入的视频 DA转换器、标准的 TTL输入 和互补输出高阻抗的模拟输出电流源。-SDA7123 a three-way high-speed, monolithic DAC. It includes three-way high-speed, 10-bit input video DA converter, a standard TTL input and complementary outputs the anal
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数控直流电流源中V-I转换电路的实现方法的讨论-VI NC DC current source converter circuit implementation discussion
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:热电阻在工业生产中常用于中低温区测温,是温度测量中应用较为普遍的测温元件.通过对其测
温原理的研究,设计了基于MSP430FI69单片机的热电阻测温仪.本设计采用恒流源驱动三线制热电
阻,配合信号平移、放大电路,利用片内A/D转换器,通过分时采样将热电阻对应的电压信号采集进来.
经过一阶插值拟合运算程序处理后显示温度值并由D/A转换器输出电压信号,再经过V-1变换实现
4—20 mA变送输出功能.-: Thermal resistance often used in indus
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This paper presents the enhancement of voltage sags/swell harmonic distortion and low power factor using
Distribution Static Compensator (D-STATCOM). The model is based on the Voltage Source Converter (VSC) principle. The
D-STATCOM injects a curr
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本文主要介绍了温度测量仪的设计,包括硬件设计和软件设计。文中首先介绍系统总体结构,接着对系统设计过程进行具体介绍(包括硬件部分和软件部分),最后对本次设计进行总结。在本次设计中选用了PT1000作为温度传感器,采用恒流源测温方法,通过单片机进行控制,用放大器、A/D转换器进行温度信号的采集。总的来说,该设计是可行的。-This paper mainly introduces the design of the temperature measurement instrument, includi
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A hybrid fuzzy-PI controller for voltage source
converter based HVDC (VSC-HVDC) transmission system is
proposed in this paper. At first, the elementary model of VSCHVDC
is described. Then the fuzzy self-tuning control strategy is
proposed, in
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A static synchronous compensator (STATCOM), also known as a "static synchronous condenser" ("STATCON"), is a regulating device used on alternating current electricity transmission networks. It is based on a power electronics voltage-source converter
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本系统以直流电流源为核心,MSP430F149单片机为控制系统,输出数字信号,经过D/A转换器(TLV5638)输出模拟量,将实际值输出到单片机,由单片机进行比较调整,控制电流输出-This system DC current source to the core, MSP430F149 microcontroller for the control system, the output digital signal through D/A converter (TLV5638) analog
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Space Vector Modulation for a Current Source Converter (RM Type)
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Modeling and Control of a DFIG-Based Wind
Turbine During a Grid Voltage Drop
Doubly-fed induction generators (DFIG) are widely
used in wind energy generation systems. During a grid voltage
drop, performance is degraded with rotor over current
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A Single Phase Current Source PFC Converter Based on UC3854
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A Single Phase Current Source PFC Converter Based on UC3854
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电流源电压源电流分配动感地带发顺风顺丰发顺风顺丰(Current source, voltage source, current assignment)
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The conventional HVDC systems are based on the line-commutated current source converter (LCC) and are line commutated.
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