程控高精度恒流源设计
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哈尔滨工业大学工学硕士学位论文
Abstract
In the industrial field, more and more electronic devices require high-precision, wide range of constant current source device to provide a stable current to drive the device to work properly. Most of the current source products can not meet the requirements of high-precision electronic equipment, even meet the requirements because of a small number of expensive, Because of the price and poor portability, a few that meet the requirements can not meet the requirements of the widely used. In this paper, high-precision current source and its evaluation method are the study of the content. This paper proposes programmable constant current source based on module-based design, which has a simple circuit structure, high output accuracy, stability and strong benefits. At the same time in order to test the performance of current source presents a high-precision current source for the evaluation method is proposed.
Keywords: constant current source, evaluation methods, modular design, high precision, wide range
-III-
哈尔滨工业大学工学硕士学位论文
目录
摘 要 ........................................................................................................................... I Abstract......................................................................................................................... II
Firstly，by analyzing the traditional constant current source technologies and the status of domestic and international current source products, this paper summarizes the advantages and disadvantages of the traditional constant current source technology . On this basis, put forward specific design solutions through the design requirements and specifications of the analysis. Programmable current source designed with modular design has good expansion and portability, which also improve the current output range and precision at the same time. Program was designed to the specific design of each module and error analysis, and the results of error analysis demonstrate the feasibility of the design. Through the meticulous research of the current source output current stability of the factors, clear of the main factors of stability constant current source for the reference voltage and the VI converter sampling resistor. And point out that DAC peripherals stability and VI circuit design is the key to improving system. In the software, use the firmware design on the host computer to control the output voltage DAC and calibrate output current calibration in the least squares method. Finally, on base of supplement and improvement of the original standards set by the Department of Space, proposed design for the evaluation method，by drawing on the standards the DC current source industry standard test methods and complement and complete is
Instrument Science and Technology
Department of Automatic Test and Control
Date of Defence：
June, 2011
Degree-Confirming-Institution： Harbin Institute of Technology
按照提出的评定方法对恒流源的技术指标进行评定测量，实验数据证明输 出电流的最大绝对误差要小于 1μA、温漂系数小于 1μA/℃，负载、稳定度等 其他各项技术指标也均达到了预期的设计要求。因此，本设计提出的程控恒流 源及其评定方法，可以满足高精度电子设备的需求。
关键词：恒流源；评定方法；模块化设计；高精度；宽范围
导
师：彭 宇 教授
申 请 学 位：工学硕士
学 科、专 业：仪器科学与技术
所 在 单 位：自动化测试与控制系
答 辩 日 期：2011 年 6 月
授予学位单位：哈尔滨工业大学
Classified Index: TP273.5 U.D.C: 621.3
Dissertation for the Master Degree in Engineering
硕士学位论文
程控高精度恒流源设计 DESIGN OF PROGRAMMABLE HIGH
PRECISION CURRENT SOURCE
温英俊
哈尔滨工业大学 2011 年 6 月
中图分类号：TP273.5 UDC：621.3
学校代码：10213 密级：公开
工学硕士学位论文
程控高精度恒流源设计
硕 士 研 究 生：温英俊
本文首先通过分析传统恒流源技术以及国内外恒流源产品的现状，归纳总 结出传统恒流源技术的优缺点。在此基础之上，通过对设计要求和技术指标的 分析提出具体的设计方案。设计方案采用模块化设计思想，在提高电流输出范 围和精度的同时，又具有良好的拓展性和可移植性。然后根据设计方案进行了 各个功能模块的具体设计及误差分析，并论证了设计方案的可行性。通过对影 响恒流源输出电流稳定性的因素进行细致研究，明确了影响恒流源稳定性的因 素。并指出提高系统稳定的关键在于 DAC 外围电路和 V-I 电路稳定性方面的 设计。在软件上，采用 FPGA 固件设计实现了上位机对 DAC 输出电压的有效 控制。最后在原航天部制定的标准基础上，通过借鉴直流标准恒流源检定方法 的行业标准，对其进行了补充和完善，提出了适用于本设计的评定方法。
DESIGN OF PROGRAMMABLE HIGH PRECISION CURRENT SOURCE
Candidate：
Wen Yingjun
Supervisor：
Prof. Peng Yu
Academic Degree Applied for： Master of Engineering
Specialty： Affiliation：
哈尔滨工业大学工学硕士学位论文
摘要
在工业领域中，越来越多的电子设备需要高精度、宽范围的恒流源设备提 供稳定电流来驱动设备正常工作。但是目前大多数的恒流源产品都无法满足高 精度电子设备的要求，少数满足要求的也因为价格昂贵、便携性差而无法获得 广泛应用。而且对于恒流源的评定方法也没有统一的标准。本文以高精度恒流 源及其评定方法为研究内容，提出了一种基于模块设计的程控恒流源，使其具 有电路结构简洁、输出精度高、稳定性强的优点。同时为了测试恒流源的性 能，提出了一种适用于高精度恒流源的评定方法。
According to proposed evaluation method，the constant source is measured
-II-
来自百度文库
哈尔滨工业大学工学硕士学位论文
and technical specifications are assessed, experimental data prove that the maximum absolute error of the output current to less than 1μA, temperature drift coefficient of 1μA/℃, load, stability and other technical indicators were also achieve the desired design requirements. Therefore, the design of the programmable current source and its assessment methods meet the demand for high-precision electronic devices.
第 1 章 绪论 .................................................................................................................1 1.1 课题来源及研究的目的和意义 ........................................................................1 1.2 国内外恒流源技术研究现状 ............................................................................2 1.2.1 线性调节方式 .............................................................................................3 1.2.2 开关式 .........................................................................................................4 1.2.3 控制理论 .....................................................................................................5 1.3 国内外恒流源产品现状 ....................................................................................6 1.3.1 芯片级产品 .................................................................................................6 1.3.2 模块化产品 .................................................................................................7 1.3.3 仪器仪表 .....................................................................................................8 1.4 恒流源性能评定现状 ......................................................................................10 1.5 课题的主要研究内容 ......................................................................................10
哈尔滨工业大学工学硕士学位论文
Abstract
In the industrial field, more and more electronic devices require high-precision, wide range of constant current source device to provide a stable current to drive the device to work properly. Most of the current source products can not meet the requirements of high-precision electronic equipment, even meet the requirements because of a small number of expensive, Because of the price and poor portability, a few that meet the requirements can not meet the requirements of the widely used. In this paper, high-precision current source and its evaluation method are the study of the content. This paper proposes programmable constant current source based on module-based design, which has a simple circuit structure, high output accuracy, stability and strong benefits. At the same time in order to test the performance of current source presents a high-precision current source for the evaluation method is proposed.
Keywords: constant current source, evaluation methods, modular design, high precision, wide range
-III-
哈尔滨工业大学工学硕士学位论文
目录
摘 要 ........................................................................................................................... I Abstract......................................................................................................................... II
Firstly，by analyzing the traditional constant current source technologies and the status of domestic and international current source products, this paper summarizes the advantages and disadvantages of the traditional constant current source technology . On this basis, put forward specific design solutions through the design requirements and specifications of the analysis. Programmable current source designed with modular design has good expansion and portability, which also improve the current output range and precision at the same time. Program was designed to the specific design of each module and error analysis, and the results of error analysis demonstrate the feasibility of the design. Through the meticulous research of the current source output current stability of the factors, clear of the main factors of stability constant current source for the reference voltage and the VI converter sampling resistor. And point out that DAC peripherals stability and VI circuit design is the key to improving system. In the software, use the firmware design on the host computer to control the output voltage DAC and calibrate output current calibration in the least squares method. Finally, on base of supplement and improvement of the original standards set by the Department of Space, proposed design for the evaluation method，by drawing on the standards the DC current source industry standard test methods and complement and complete is
Instrument Science and Technology
Department of Automatic Test and Control
Date of Defence：
June, 2011
Degree-Confirming-Institution： Harbin Institute of Technology
按照提出的评定方法对恒流源的技术指标进行评定测量，实验数据证明输 出电流的最大绝对误差要小于 1μA、温漂系数小于 1μA/℃，负载、稳定度等 其他各项技术指标也均达到了预期的设计要求。因此，本设计提出的程控恒流 源及其评定方法，可以满足高精度电子设备的需求。
关键词：恒流源；评定方法；模块化设计；高精度；宽范围
导
师：彭 宇 教授
申 请 学 位：工学硕士
学 科、专 业：仪器科学与技术
所 在 单 位：自动化测试与控制系
答 辩 日 期：2011 年 6 月
授予学位单位：哈尔滨工业大学
Classified Index: TP273.5 U.D.C: 621.3
Dissertation for the Master Degree in Engineering
硕士学位论文
程控高精度恒流源设计 DESIGN OF PROGRAMMABLE HIGH
PRECISION CURRENT SOURCE
温英俊
哈尔滨工业大学 2011 年 6 月
中图分类号：TP273.5 UDC：621.3
学校代码：10213 密级：公开
工学硕士学位论文
程控高精度恒流源设计
硕 士 研 究 生：温英俊
本文首先通过分析传统恒流源技术以及国内外恒流源产品的现状，归纳总 结出传统恒流源技术的优缺点。在此基础之上，通过对设计要求和技术指标的 分析提出具体的设计方案。设计方案采用模块化设计思想，在提高电流输出范 围和精度的同时，又具有良好的拓展性和可移植性。然后根据设计方案进行了 各个功能模块的具体设计及误差分析，并论证了设计方案的可行性。通过对影 响恒流源输出电流稳定性的因素进行细致研究，明确了影响恒流源稳定性的因 素。并指出提高系统稳定的关键在于 DAC 外围电路和 V-I 电路稳定性方面的 设计。在软件上，采用 FPGA 固件设计实现了上位机对 DAC 输出电压的有效 控制。最后在原航天部制定的标准基础上，通过借鉴直流标准恒流源检定方法 的行业标准，对其进行了补充和完善，提出了适用于本设计的评定方法。
DESIGN OF PROGRAMMABLE HIGH PRECISION CURRENT SOURCE
Candidate：
Wen Yingjun
Supervisor：
Prof. Peng Yu
Academic Degree Applied for： Master of Engineering
Specialty： Affiliation：
哈尔滨工业大学工学硕士学位论文
摘要
在工业领域中，越来越多的电子设备需要高精度、宽范围的恒流源设备提 供稳定电流来驱动设备正常工作。但是目前大多数的恒流源产品都无法满足高 精度电子设备的要求，少数满足要求的也因为价格昂贵、便携性差而无法获得 广泛应用。而且对于恒流源的评定方法也没有统一的标准。本文以高精度恒流 源及其评定方法为研究内容，提出了一种基于模块设计的程控恒流源，使其具 有电路结构简洁、输出精度高、稳定性强的优点。同时为了测试恒流源的性 能，提出了一种适用于高精度恒流源的评定方法。
According to proposed evaluation method，the constant source is measured
-II-
来自百度文库
哈尔滨工业大学工学硕士学位论文
and technical specifications are assessed, experimental data prove that the maximum absolute error of the output current to less than 1μA, temperature drift coefficient of 1μA/℃, load, stability and other technical indicators were also achieve the desired design requirements. Therefore, the design of the programmable current source and its assessment methods meet the demand for high-precision electronic devices.
第 1 章 绪论 .................................................................................................................1 1.1 课题来源及研究的目的和意义 ........................................................................1 1.2 国内外恒流源技术研究现状 ............................................................................2 1.2.1 线性调节方式 .............................................................................................3 1.2.2 开关式 .........................................................................................................4 1.2.3 控制理论 .....................................................................................................5 1.3 国内外恒流源产品现状 ....................................................................................6 1.3.1 芯片级产品 .................................................................................................6 1.3.2 模块化产品 .................................................................................................7 1.3.3 仪器仪表 .....................................................................................................8 1.4 恒流源性能评定现状 ......................................................................................10 1.5 课题的主要研究内容 ......................................................................................10