基于單片機的PWM調壓系統設計

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基于單片機的PWM調壓系統設計(任務書,開題報告,外文翻譯,論文14000字)
摘  要
隨著社會的日益發展,對于各行各業,日常生活乃至專業研究,電壓的可靠性使用已經越來越成為我們重點關注的問題。電壓是權衡電能質量的根本指標之一,對于電壓調整,幾乎覆蓋了這些科技電子產品的方方面面,很多核心部件對于電壓是非常敏感的,因此這就對我們進行電壓的調整適配提出了更高的更迫切的要求。
基于單片機的PWM調壓,對于既定輸入電壓,無法滿足我們所需要的標準電壓時,那么就可以使用該調壓方案,去通過一系列的電壓變換,從而得到我們所需要的符合要求的目標電壓。基于單片機的PWM調壓技術是應用于汽車電子、消費電子、空調冰箱等智能家電變頻等各種智能化科技化場景中的一項技術。它可以在使用場景中,使得場景更加的自動化和智能化,能夠大大的提高人機交互性。
本文主要是對調壓進行一個具體化研究探索,是基于單片機的PWM調壓,首先我們給定直流24V電壓,然后通過單片機控制數控電源電路,數控電源電路包括D/A輸出電路、串聯穩壓電路以及負載,然后會得到直流0~15V的初始電壓,之后會將這個初始輸出電壓作為電壓反饋電路的輸入,然后再接入A/D轉換電路,最后將符合我們要求的結果顯示在單片機液晶顯示屏上。
經過實驗驗證,本系統可以在直流24V既定輸入電壓的基礎上對電壓進行調節變換,其變換后的目標電壓在直流0~15V范圍內,并且本系統中所進行的變換是直流-直流的電壓變換,而非直流-交流-直流變換。其不足之處在于,對于我們認為設定的目標電壓而言,其液晶顯示屏輸出的電壓數值存在些許誤差,因為本系統采用51單片機作為硬件主體,從而進行電路延伸擴展,存在的誤差可在之后的具體實現方案中進一步優化減少。此外,本文提供的方法在保證基本輸出精度的的前提下,盡量減少外界因素對輸出精度的影響,直流24V我采用了直流穩壓電源適配器,能在一定程度上去減少硬件運行發生意外的概率。通過實際操作驗證,證明了本文的系統設計思路的正確性,達到了我們的期望值,具有較好的實用性。

關鍵詞:單片機;PWM調壓;電壓變換;輸出精度

Abstract
With the development of society, for all walks of life,daily life and even professional research, the reliability of voltage has become more and more our focus. Voltage is one of the fundamental indicators for weighing power quality. For voltage adjustment, it covers almost all aspects of these technology electronics. Many core components are very sensitive to voltage, so this puts higher voltage adjustment adjustment for us. More urgent requirements.
Based on the PWM voltage regulation of the single chip microcomputer, if the standard voltage is not enough for the given input voltage, then the voltage regulation scheme can be used to pass a series of voltage conversions to obtain the required target voltage. . The PWM voltage regulation technology based on single chip microcomputer is a technology applied in various intelligent scientific and technological scenes such as automobile electronics, consumer electronics, air conditioner refrigerators and other smart home appliances. It can make the scene more automated and intelligent in the usage scenario, which can greatly improve human-computer interaction.
This paper is mainly to carry out a specific research and exploration on voltage regulation. It is based on PWM voltage regulation of single chip microcomputer. First, we give DC 24V voltage, and then control the digital power supply circuit through single chip microcomputer. The digital power supply circuit includes D/A output circuit and series voltage regulator. The circuit and the load will then get the initial voltage of 0-15V DC. After that, the initial output voltage will be used as the input of the voltage feedback circuit, and then connected to the A/D conversion circuit. Finally, the result that meets our requirements will be displayed on the LCD. On the display.
After experimental verification, the system can adjust and change the voltage based on the established input voltage of 24V DC. The converted target voltage is in the range of 0-15V DC, and the conversion in this system is DC-DC voltage. Transform, not DC-AC-DC conversion. The shortcoming is that, for the target voltage we think is set, there is a slight error in the voltage value of the liquid crystal display output. Because the system uses 51 single-chip microcomputer as the hardware main body, the circuit extends and expands, and the error can be Further optimization is reduced in the specific implementations that follow. In addition, the method provided in this paper minimizes the influence of external factors on the output accuracy under the premise of ensuring the basic output accuracy. I used a DC stabilized power adapter for DC 24V, which can reduce the probability of accidents in hardware operation to a certain extent. Through the actual operation verification, the correctness of the system design idea of this paper is proved, and our expectation value is achieved, which has good practicability.


Key Words:Single chip microcomputer; PWM voltage regulation; voltage conversion; output accuracy
 

基于單片機的PWM調壓系統設計
基于單片機的PWM調壓系統設計
基于單片機的PWM調壓系統設計



目  錄
第1章 緒論    1
1.1 研究目的及意義    1
1.2 國內外研究現狀    2
1.3 研究內容說明    2
第2章 調壓系統總體設計    4
2.1 調壓系統需求分析    4
2.2 調壓系統方案設計    4
第3章 調壓系統硬件電路設計    6
3.1單片機最小系統電路    6
3.2 LCD硬件電路    7
3.2.1 LCD1602原理    8
3.2.2 LCD1602顯示電路    9
3.3 電源模塊設計    9
3.4 D/A輸出電路設計    10
3.5 串聯穩壓整體模塊電路設計    12
3.5.1 運算放大模塊    13
3.5.2 A/D轉換模塊    14
第4章 調壓系統軟件設計    16
4.1 按鍵檢測軟件設計    17
4.2 串聯穩壓軟件設計    18
4.3 A/D轉換軟件程序設計    19
4.4 液晶顯示軟件程序設計    20
第5章 調壓系統調試與結果分析    21
5.1 調壓系統調試    21
5.2 結果分析    26
第6章 總結與展望    27
參考文獻    29
致謝    31

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