Description: 以 AT89S52为核心 ,通过 A/D、D/A转换和 V/ I转换及独特的算法实现高精度的电流控制 ,电流输出范围为 20～
2000mA的数控直流电流源。该电流源具有电流可预置 , lmA步进 ,同时显示给定值和实测值等功能。-to AT89S52 as the core and, through A / D, D / A conversion and V / I and unique conversion algorithm, high-precision current control, Current output range of 20 ~ 2000mA NC DC current source. The current source can be preset with current, lmA stepper, also showed a given value and the function of the measured value. Platform: |
Size: 180719 |
Author:万红军 |
Hits:
Description: 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单片机中构成闭环控制；通过液晶显示器显示此信号的值。-the system is Sunplus SPCE061A as the core controller, with current can be preset. Stepping can be adjusted to the current output signal and the current signal Preferences can also showed NC DC current source. Systems include : Sunplus SPCE061A streamline the development board, keyboard and display circuit, voltage-controlled current source circuit, Correction Circuit, and the power circuit. System through the keyboard keys on the current values of Preferences, Sunplus SPCE061A send the corresponding digital signal through D / A conversion, signal amplification, level translators, voltage-controlled current source, and the required output current; actual output current through precision resistor voltage signal into sampling, After high input impedance amplifier, A / D converters. feedback Platform: |
Size: 71926 |
Author:panchuxin |
Hits:
Description: 以 AT89S52为核心 ,通过 A/D、D/A转换和 V/ I转换及独特的算法实现高精度的电流控制 ,电流输出范围为 20～
2000mA的数控直流电流源。该电流源具有电流可预置 , lmA步进 ,同时显示给定值和实测值等功能。-to AT89S52 as the core and, through A/D, D/A conversion and V/I and unique conversion algorithm, high-precision current control, Current output range of 20 ~ 2000mA NC DC current source. The current source can be preset with current, lmA stepper, also showed a given value and the function of the measured value. Platform: |
Size: 180224 |
Author:万红军 |
Hits:
Description: 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单片机中构成闭环控制；通过液晶显示器显示此信号的值。-the system is Sunplus SPCE061A as the core controller, with current can be preset. Stepping can be adjusted to the current output signal and the current signal Preferences can also showed NC DC current source. Systems include : Sunplus SPCE061A streamline the development board, keyboard and display circuit, voltage-controlled current source circuit, Correction Circuit, and the power circuit. System through the keyboard keys on the current values of Preferences, Sunplus SPCE061A send the corresponding digital signal through D/A conversion, signal amplification, level translators, voltage-controlled current source, and the required output current; actual output current through precision resistor voltage signal into sampling, After high input impedance amplifier, A/D converters. feedback Platform: |
Size: 71680 |
Author:panchuxin |
Hits:
Description: 基于单片机的高精度的数字直流电流源设计fangan-Based on the number of single-chip high-precision DC current source design fangan Platform: |
Size: 180224 |
Author:张永红 |
Hits:
Description: 该数控直流电流源以精密压控电流源为核心、用单片机、DAC组成控制电路，引入“S类”反馈控制功率放大电路，实现超精密电流控制、具备精准的扩流能力、低失调、有步进、同时带有 丰富扩展功能的精密电流源。经过ADC采样，完成输出电流显示功能，并使输出范围覆盖0～2A，是理想的电流源解决方案。-The CNC precision DC voltage-controlled current source to current source at the core, with single-chip, DAC control circuit components, the introduction of " S-type" feedback control circuit power amplifier to achieve ultra-precision current control, with precise flow capacity expansion, low disorder, there is stepping at the same time and expanded with rich precision current source. ADC sampling after completion of output current display, and output cover 0 ~ 2A, the current source is an ideal solution. Platform: |
Size: 2048 |
Author:bo |
Hits:
Description: 用单片机制作的一种高精度数控直流电流源的设计与实现-Produced by a single-chip high-precision DC Current Source CNC Design and Implementation Platform: |
Size: 516096 |
Author:陈仲奇 |
Hits:
Description: 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，减小了实际值与预设值之间的误差，实现了电流可预置、可步进调整、输出的电流信号可直接数字显示的功能。采用硬件闭环、软件闭环、软件实时积分、实时滤波的方法，锁定输出电流，从而实现了高精度恒流源的目的。此次所设计的电流源具有精度高、结构简单、工作稳定、操作方便、成本低廉、带负载能力强等优点-The scheme adapts high precision voltage source designed by ourselves Micro Control Unit (MCU) D/A converter and amplifier to control the transmitting state of field effect transistor which attains constant current. The system adapts MCU 89c52 as main control part the output current is transformed into the voltage by sample resistant and the voltage is sent to D/A converter and then sent to the MCU compared with the setting current. If there exist errors we should adapt D/A converter output and change the transmitting state of field effect transistor. The actual value is directed to the setting value. The direct current reaches the constant value. The closed loop control and PID arithmetic is used to realize high precision and wide range in the software design part. The intelligent current source realizes that the output current can be preset adjusted step by step and displayed in digit directly. Above functions are operated by keyboard within the current source. The stability of this Platform: |
Size: 2048 |
Author:zhendongzhao |
Hits:
Description: 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 of 20mA ~ 2000mA NC dc current source. The current source has a current can be preset, 1mA stepping, also shows a given value and the measured values and other functions Platform: |
Size: 247808 |
Author:xiang |
Hits:
Description: PT100，采用恒流源电路。可以做到很高的精度，但是要用24位的AD。-PT100, using constant current source circuit. Can do very high precision, but in 24-bit AD. Platform: |
Size: 317440 |
Author:钱将军 |
Hits:
Description: This article introduces two new configurations for precision current sources and current mirrors. Both
circuits use n-p-n bipolar devices, but one provides a current source while the other provides a current sink. This
permits the use of current sources in IC designs implemented with processes that do not allow p-n-p devices.
Analog building blocks such as voltage-to-current converters, active loads, and sink and source current mirrors
can be constructed from the new circuits using only n-p-n devices. Furthermore, because these circuits achieve
the required precision without the use of high-gain amplifiers, the bandwidths of the circuits are large compared to conventional configurations. The source currents are dependent on a single reference voltage and exhibit good temperature sensivitity Platform: |
Size: 386048 |
Author:john hice |
Hits:
Description: At SRRC, a precision output current monitoring
system is installed to monitor the output performance of
all the booster/storage ring power supplies. Accurate DC
current transformers (DCCTs) are attached to the output
terminal of every power supply system. Each
transformer’ s gain/offset are carefully calibrated against
high precision current source and approximated using
high-order polynomial curve fitting. The output of each
DCCT is connected to multi-channels data logger for realtime
data collection, the collected data are calibrated
using the interpolated DCCT gain/offset value. A PC
station is set up to serve as host to store the current output
for real-time monitoring. This monitoring system provide
a precise real-time database for rapid fault diagnosing
whenever there is malfunction of the beam operation Platform: |
Size: 517120 |
Author:john hice |
Hits:
Description: 本文介绍了基于可控电流源的高精度高细分数步进电机细分驱动方法，采用
PwM(脉冲宽度调制)和5阶巴特沃斯低通滤波器实现了双14位精度较高的DAc，用
于控制精密可控电流源的电流输出，使得励磁线圈中流经的电流为稳定的直流，实现
了步进电机低噪声，高稳定度的细分驱动运行。
-This article describes the controlled current source based on the subdivision number of high precision stepping motor driving method, using PwM (pulse width modulation) and 5-order Butterworth low-pass filter to achieve a double-precision 14-bit high DAc, precision controlled current source for controlling the current output, making the current flowing through the coil excitation for the stability of the DC, stepper motor to achieve a low noise, high stability of the sub-drive operation. Platform: |
Size: 2961408 |
Author:孙文 |
Hits:
Description: 一种新型低纹波高精度数子控制直流恒电流源-A new low-ripple high-precision control of the number of sub-constant current source DC Platform: |
Size: 286720 |
Author:欧阳 |
Hits:
Description: 大功率精密恒流源系统设计Large power precision constant current source system design-Large power precision constant current source system design Platform: |
Size: 121856 |
Author: |
Hits:
Search - precision current source