線性直流穩壓電源的設計

電子機電論文編號:JD681  論文字數:20725,頁數:47

目 錄

摘  要                                                                  Ⅰ
Abstract                                                                Ⅱ
任務書                                                                  Ⅲ
第一章：序言                                                             1
1.1    本設計題目的來源                                                 1
1.2    本設計的目的和意義                                               1
1.3    國內外研究現狀分析                                               1
1.4    題目特色與創新之處                                               2
1.5 研究方法、技術路線、實驗方案                                     2
第二章：線性直流穩壓電源的理論分析                                4
2.1    線性直流穩壓電源的組成部分                                       4
2.1    電源變壓器概述                                                   4
2.2    整流電路概述                                                     5
2.3    濾波電路概述                                                     8
2.4    穩壓電路概述                                                    11
第三章：±5V直流穩壓電源                                                16
3.1   ±5V直流穩壓電源的結構和組成                                      16
3.1.1   整流電路的設計                                            16
3.1.2   濾波電路的設計                                            17
3.1.3   穩壓電路的設計                                            17
3.1.4   保護和報警電路的設計                                      18
3.1.5   電源輸出及工作指示電路的設計                              19
3.2   ±5V直流穩壓電源的元器件選擇                                      20
3.2.1  電源變壓器的選擇                                           20
3.2.2  整流二極管的選擇                                           20
3.2.3  濾波電容的選擇                                             21
3.2.4  穩壓模塊的選擇                                             21
3.2.5  保護和報警電路元件的選擇                                   21
3.2.6  電源工作指示電路元件的選擇                                 21
3.3  ±5V直流穩壓電源的PCB板的制作                                    21
第四章：±18V直流穩壓電源                                              23
4.1   ±18V直流穩壓電源的結構和組成                                    23
4.1.1   整流電路的設計                                           23
      4.1.2   濾波電路的設計                                          24
      4.1.3   穩壓電路的設計                                          24
      4.1.4   保護和報警電路的設計                                    26
      4.1.5   電源輸出及工作指示電路的設計                            27
4.2   ±18V直流穩壓電源的工作原理簡述                                 28
      4.2.1   ＋18V電源的工作原理                                     28
      4.2.2   －18V電源的工作原理                                     29
4.3   ±18V直流穩壓電源的元器件選擇                                   30
4.3.1  電源變壓器的選擇                                         30
4.3.2  整流二極管的選擇                                         30
4.3.3  濾波電容的選擇                                           30
4.3.4  穩壓電路元件的選擇                                       31
4.3.5  保護和報警電路元件的選擇                                 31
4.3.6  電源工作指示電路元件的選擇                               32
4.4   ±18V直流穩壓電源的PCB板的制作                                32
第五章：電源實物制作                                                  34
4.1元器件的焊接                                                      34
4.2電源的安裝與調試                                                  35
結束語                                                                37
致謝    38
附錄  39
參考文獻  43

摘 要

本論文詳細介紹了兩種線性直流穩壓電源，分別為輸出電壓為固定±5V、帶短路保護、報警的主電源，和輸出0～±18V可調且帶短路保護、報警的直流穩壓電源。本設計是基于對電子工程系數字電子實驗室現有的兩款數字電路綜合實驗箱所使用的直流穩壓電源的改進。本設計的兩種直流穩壓電源能夠提供穩定可靠的直流輸出電壓，其輸出電流在1.5A以下，可以滿足當前實驗的需要。且當因各種原因而出現短路時能及時提供可靠的保護，并對輸出端的短路故障提供聲光報警指示，提醒使用者及時診斷故障或切斷電源，待短路故障排除后復位恢復正常工作，提高了實驗箱的安全性能。由于本設計的直流穩壓電源最終要安裝在實驗箱內，其印刷電路板、電源變壓器等的設計與布局充分考慮小巧緊湊與散熱的問題，其間的電氣連接采用插線排式連接，又兼顧了美觀大方，使得實物設計更加接近于產品！

關鍵詞：線性直流穩壓電源；短路保護；聲光報警；復位恢復。

Design of  The  Linearity  Direct  Current  Steady Voltage Electrical  Source
Abstract

This thesis was detailed to introduce two kinds of linearity direct current steady voltage electrical sources, the main power supply that output voltage for fixed ±5Vwith the short-circuit protection and give an alarm, and the other direct current steady voltage power supply that output 0～±18V adjustable voltage with the short-circuit protect and give an alarm.This design is owing to existing two numerical electric circuits comprehensive experiment box of the engineering department electronics laboratory of electronics use of the improvement of direct current steady voltage power supply.Two kinds of the direct current  steady voltage electrical source can provide to stabilize the dependable direct current exportation electric voltage, it outputs the electric current below 1.5 A, the demand that can satisfy the current experiment.And when appear the short circuit can provide the dependable protection in time because of various reason, and provide sound and light to the short-circuit phenomenon that the exportation carry to give an alarm of the designation, remind the user to examine the breakdown or cut off the power supply in time, need the short circuit to reset to recover the normal work after break down the exclusion, raise safe function of the experiment box.Because the direct current steady voltage electrical source end to install in experiment box, the design and layoutses of its PBC board, power transformer...etc. consider the cleverly made tightly packed well with disperse heat problem, the electricity conjunction of the in the interval adopts the patch cord row type conjunction, attending to the beauty in addition generous, make real object the design is near to in the product more!

Key word: The Linearity Direct Current Steady Voltage Electrical Source;Short-circuit Protect；Give an Alarm With Sound and Light ；Reposite to Comeback