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摘要
随着科学技术的迅速发展,人们对物质需求也越来越高,特别是一些高新技术产品。电源——作为当今人们生活中普遍存在的电子商品,对它的要求更加灵活多样,从上世纪九十年代末起便迅速发展。随着对系统更高效率和更低功耗的需求,电信与数据通讯设备的技术更新推动电源行业中直流/直流电源转换器向更高灵活性和智能化方向发展。
本课题研究一种以单片机为核心的智能化高精度简易直流电源的设计——硬件设计, 该电源采用数字调节、闭环实时监控、输出精度高, 特别适用于各种有较高精度要求的。该设计硬件方面包括单片机、变压器、整流滤波、串联调整、D/A、比较放大、取样电路等电路组成。市电220V电压通过变压器流入系统,经过整流、滤波后变成近似的直流电压,再经过稳压部分稳压后获得稳定的直流输出。稳压部分由达林顿管作为调整管,由运放作为反馈取样之后的放大电路,利用放大电路来提高调整管的反应灵敏度电压稳定性。
整个电路的设计就是在综合考虑各个模块现有的电路的基础上,选择最佳电路来实现设计目标的。
关键词: 稳压电源;高精度;整流;滤波;单片机;D/A;A/D
ABSTRACT
With the rapid development of science and technology, people matter more to the high demand, especially some high-tech products. Power - as prevalent in people's lives today electronic goods,It requires amore flexible and diverse, from the last century, it developed rapidly since the late ies. With greater efficiency and lower system power requirements, munications and munications equipment, technology updates in the industry to promote the power DC/DC power converter to a higher flexibility and intelligent direction.
This study is based on single chip as the core of a high-precision intelligent design simple DC power supply - hardware design, the digital power supply regulation, closed-loop real-time monitoring, the output of high precision, especially for a variety of higher accuracy requirements. The design of hardware including microcontrollers, transformer, rectifier filter, series adjustment, D / A, compared to enlarge, sampling circuit .220V mains voltage through the transformer into the system, after rectification, filtering into a similar DC voltage, and then through the regulator part of the stable after the DC voltage output. Regulated in part by Darlington as the regulator, the op amp as the feedback amplifying circuit after sampling, the use of amplifier circuit to increase the sensitivity of the response regulator voltage stability.
The circuit design of each module is taken into account on the basis of the existing circuit to select the best circuits to achieve design