A000824B-DED模塊,ADVANTES使用產(chǎn)品
針對(duì)這兩點(diǎn)，需考量各種應(yīng)用環(huán)境的應(yīng)用電路設(shè)計(jì)和具體參數(shù)，客戶可自行結(jié)合開(kāi)關(guān)盒尺寸進(jìn)行設(shè)計(jì)，但需將單火線電源的可靠性、體積、電源匹配的應(yīng)用電路方案納入考慮。
基于市面上各個(gè)廠家的單火線電源產(chǎn)品的不同，其搭配的外圍電路及其電子元器件也并不相同，如模塊類的單火線電源集成度更高、IC類的單火線產(chǎn)品對(duì)客戶的自主研發(fā)能力要求較高。這里以金升陽(yáng)的LSF01-K5BxxSS系列為例。后端控制系統(tǒng)為NB-loT等大功率負(fù)載的應(yīng)用方案
A000824B-DED模塊,ADVANTES使用產(chǎn)品（以下簡(jiǎn)稱：超級(jí)電容方案）。由于后端控制系統(tǒng)可能為NB-IoT等大功率負(fù)載，就需要在后端控制系統(tǒng)工作時(shí)，若單火線電源處于關(guān)態(tài)，LED無(wú)“鬼火”現(xiàn)象，并且供電電壓正常；若單火線電源處于開(kāi)態(tài)，要求供電電壓正常，并且LED無(wú)“頻閃”現(xiàn)象。
該方案主要通過(guò)對(duì)超級(jí)電容/鋰電池進(jìn)行充電儲(chǔ)能，提供穩(wěn)定輸出電壓給后端控制系統(tǒng)工作。由于超級(jí)電容方案內(nèi)部設(shè)計(jì)了開(kāi)態(tài)和關(guān)態(tài)充電電路，故實(shí)際應(yīng)用時(shí)無(wú)需因超級(jí)電容/鋰電池?zé)o電壓導(dǎo)致更換超級(jí)電容/鋰電池，該方案可長(zhǎng)期正常提供穩(wěn)定輸出電壓。開(kāi)關(guān)電源在應(yīng)用時(shí)，可能需要輸入端的主電網(wǎng)提供短時(shí)間的大電流脈沖，這種電流脈沖通常被稱為“輸入沖擊電流”。輸入沖擊電流給主電網(wǎng)中的斷路器和其它熔斷器的選擇造成了一定麻煩：斷路器一方面要保證在過(guò)載時(shí)熔斷，起到保護(hù)作用；另一方面又必須在輸入沖擊電流出現(xiàn)時(shí)不能熔斷，避免誤動(dòng)作。輸入沖擊電流也會(huì)產(chǎn)生輸入電壓波形塌陷，使電網(wǎng)的供電質(zhì)量變差，進(jìn)而影響其它用電設(shè)備的工作。為確保開(kāi)關(guān)電源的供電穩(wěn)定和電源本身的安全，電源應(yīng)用的外圍電路設(shè)計(jì)尤為重要。
01 沖擊電流產(chǎn)生的原因
在開(kāi)關(guān)電源中，輸入電壓首先經(jīng)過(guò)前級(jí)濾波，再通過(guò)橋式整流器變成直流，然后通過(guò)一個(gè)很大的電解電容器進(jìn)行波形平滑，之后才能進(jìn)入真正的直流/直流轉(zhuǎn)換器。輸入浪涌電流就是在對(duì)這個(gè)電解電容器進(jìn)行初始充電時(shí)產(chǎn)生的，它的大小取決于起動(dòng)上電時(shí)輸入電壓的幅值以及由橋式整流器和電解電容器所形成回路的總電阻。如果恰好在交流輸入電壓的峰值點(diǎn)起動(dòng)時(shí)，就會(huì)出現(xiàn)峰值輸入浪涌電流。
02 限制開(kāi)機(jī)浪涌電流的五大對(duì)策
方案1 輸入端串聯(lián)負(fù)溫度系數(shù)熱敏電阻（NTC）
*最常用的輸入浪涌電流限制方法串聯(lián)負(fù)溫度系數(shù)熱敏電阻NTC是目前為止最為簡(jiǎn)單的抑制輸入浪涌沖擊電流的方法之一。
The upper computer needs to install dh+ board to exchange data with PLC through dh+ bus. Reformed control system
Now it is changed to ab mainstream 1756 ControlLogix5000 controller, and 1794 is used for remote iodistributed control system
, data can be exchanged between controllers through ControlNet network. The upper computer exchanges data with PLC through serial port. Improvement of control system
1 because there is not much data exchange between the upper and lower computers, the communication mode between the upper computer and PLC adopts serial port communication, and there is no need to buy expensive professional communication boards, which saves the project cost of customers.
2. The monitoring screen of the upper computer is more humanized. It is easy to input, modify and execute recipe parameters.
3 the controller adopts AB's latest ControlLogix System, which not only has advanced communication ability and the latest IO technology, but also can provide sequence, process, motion and transmission control at the same time. At the same time, Logix platform also provides general control engine, software programming environment, and hardware communication support across multiple platforms. One
programming software
All types of Logix controllers can be programmed.
