【正文】 to solve t he pr oblem. 2, ser vice r esponse t imes, we are mit ed t o the warr ant y period on t he oper ation of t he syst em on a r egular basis carr y out pr ehensive inspect ions, f ound t hat the problem solving on the spot ,2 死區(qū)時間控制電路的設(shè)計 s sit e t o see and list en t o t he leadership pr oposal, and in accordance wit h t he act ual needs of t he pr oject , wit h r ef er ence t o t he r elevant int ernat ional st andards and nat ional st andards, bined wit h t he experience accum ulat ed by t he pany engaged in m ult iple pr oj ects, pr epare t he t echnol gy package. I f t he cont ents or any other aspect of t he pr ogr amm e has not detailed wher e we wele your valuable m ents. Second, t he design principles of t he pr oj ect design f olows t echnology advanced, f unctional, st able and cost saving principles. And considering const ruct ion, m aint enance and oper at ion, and f or f utur e developm ent , expansion, r econst r uc tion and ot her f act ors leave r oom f or expansion. Design elements of t he syst em is t he systematic, int egr ated and pr ehensive。 9 DCDC 變換器控制電路的設(shè)計 s act ual sit uat ion and f uture developm ent r ends, bor der securit y alarm system s f or t he pr oject design. . pr inciple of syst em and bur glar alarm syst em f r om det ect or s, r egional dir ect or s, and t he alarm cont rol cent re posed of t hree par ts. I ts principles as in t he f olowing char t: det ect or s f or burglar alarm system is inside and outside t he building in key ar eas, im port ant places, prot ection, when t he probe t o ilegal invader s, t he signal t r ansmit t ed t o t he alarm contr ol: sound and light alarm, display addr ess, about he per son on dut y af ter r eceiving t he alarm, t ake m easur es according t o t he sit uation, t o contr ol t he developm ent of t he sit uation. Ant i thef t alarm system alarm f unction in addit ion t o t he above, t here is linkage f unction. Such as: open t he alar m light (including inf r ar ed lam p) , int eract ive audio and video m atrix contr oler , swit ch on t he alarm cam er a on t he spot , m at rix cont r oler TV series of contr ol: m onit or displays an im age, video f ot age, m ultim edia contr oler autom atic or human . . 8. 1 t he t hr ee guar ant ees period warr ant y 1, warr ant y 1) service period f r om dat e of accept ance of engineering, a1 year war ranty, warr ant y pr ocessing is plet ed wit hin t he r esponse t im e is 48 hour s. 2) service wit hin t he war rant y per iod, we all accessories uncondit ional war r ant y f or all equipment and r eplacem ent , all par ts f or all equipm ent (including all m achine part s) maintenance and par ts are f ree and pr ovide on sit e cleaning, t est equipm ent ser vices. Dur ing t he warr ant y period, all equipm ent r epair and m aint enance ser vices f or on sit e ser vices, t he r esult ing f ees ar e waived. Fr ee f or system expansion, upgrade related t echnical suppor t ser vices. 3) system warr ant y contact inf orm at ion t o pr ovide users wit h f r ee t echnical advice, det ailed answer t o any pr oblem in t he syst em, t o ask, answer s wil e det ail. I n t he users if unable t o solve t he pr oblem s by t hemselves, dir ectly by t elephone, f ax, I nt er , lett er, such as get ting in t ouch wit h m y pany ( which cals f or 24 hour service) , we wil r espond wit hin 4 hour s, consult ation wit h user s t o solve t he pr oblem. 2, ser vice r esponse t imes, we are mit ed t o the warr ant y period on t he oper ation of t he syst em on a r egular basis carr y out pr ehens ive inspect ions, f ound t hat the problem solving on the spot , 單相正弦波逆變電源 摘要 ： 本 單相正弦波逆變電源 的設(shè)計 ，以 12V 蓄電池作為輸入 ，輸出 為 36V、 50Hz 的 標(biāo)準(zhǔn)正弦波交流電。s sit e t o see and list en t o t he leadership pr oposal, and in accordance wit h t he act ual needs of t he pr oject , wit h r ef er ence t o t he r elevant int ernat ional st andards and nat ional st andards, bined wit h t he experience accum ulat ed by t he pany engaged in m ult iple pr oj ects, pr epare t he t echnol gy package. I f t he cont ents or any other aspect of t he pr ogr amm e has not detailed wher e we wele your valuable m ents. Second, t he design principles of t he pr oj ect design f olows t echnology advanced, f unctional, st able and cost saving principles. And considering const ruct ion, m aint enance and oper at ion, and f or f utur e developm ent , expansion, r econst r uction and ot her f act ors leave r oom f or expansion. Design elements of t he syst em is t he systematic, int egr ated and pr ehensive。 design has t he scient if ict y, r easonabilt y and operabilt y. I ts has f ol wing pr inciples: 2. 1, and advanced and applicabilt y used cur ently m ost advanced of sof t, and hardware and t he wor k t echnol gy, er rors r at e low, patible sex st r ong, upgr ade easy, used module t ype str uct ur e, expansion convenient, no r epeat const ruct ion i vestment, syst em of t echnol gy per form ance and qualit y index should r eached int er nat ional eading level。該電源采用推挽升壓和全橋逆變兩級變換 ， 在控制電路上，前級推挽升壓電路采用 SG3525 芯片控制 ，閉環(huán)反饋； 逆變部分采用 驅(qū)動芯片 IR2110 進行全橋逆變，采用U3990F6 完成 SPWM 的調(diào)制 ， 后級輸出采用電流互感器進行采樣反饋，形成雙重反饋環(huán)節(jié)，增加了電源的穩(wěn)定性； 在保護上，具有輸出過載、短路保護 、過流保護、空載保護 等多重保護功能電路，增強了該電源的可靠性和安全性 ；輸出交流電壓通過 AD637 的真有效值轉(zhuǎn)換后，再由 STC89C52 單片機的控制進行模數(shù)轉(zhuǎn)換，最終將電壓值顯示到液晶 12864 上，形成了良好的人機界面。 4 總體設(shè)計方案 10 真有效值轉(zhuǎn)換電