2098-DSD-HV030,2098-DSD-HV030
2098-DSD-HV0302098-DSD-HV030直流電源質(zhì)量指標(biāo)
?。?)電壓調(diào)整率SV 電壓調(diào)整率是表征直流穩(wěn)壓電源穩(wěn)壓性能的優(yōu)劣的重要指標(biāo),又稱為穩(wěn)壓系數(shù)或穩(wěn)定系數(shù),它表征當(dāng)輸入電壓VI變化時直流穩(wěn)壓電源輸出電壓VO穩(wěn)定的程度,通常以單位輸出電壓下的輸入和輸出電壓的相對變化的百分比表示。電壓調(diào)整率公式見圖2-2-1?! 。?)電流調(diào)整率SI 電流調(diào)整率是反映直流穩(wěn)壓電源負(fù)載能力的一項(xiàng)主要自指標(biāo),又稱為電流穩(wěn)定系數(shù)。它表征當(dāng)輸入電壓不變時,直流穩(wěn)壓電源對由于負(fù)載電流(輸出電流)變化而引起的輸出電壓的波動的抑制能力,在規(guī)定的負(fù)載電流變化的條件下,通常以單位輸出電壓下的輸出電壓變化值的百分比來表示直流穩(wěn)壓電源的電流調(diào)整率。電流調(diào)整率公式見圖2-2-2?! 。?)紋波抑制比SR 紋波抑制比反映了直流穩(wěn)壓電源對輸入端引入的市電電壓的抑制能力,當(dāng)直流穩(wěn)壓電源輸入和輸出條 直流穩(wěn)壓電源
件保持不變時,紋波抑制比常以輸入紋波電壓峰-峰值與輸出紋波電壓峰-峰值之比表示,一般用分貝數(shù)表示,但是有時也可以用百分?jǐn)?shù)表示,或直接用兩者的比值表示?! 。?)溫度穩(wěn)定性K 集成直流穩(wěn)壓電源的溫度穩(wěn)定性是以在所規(guī)定的直流穩(wěn)壓電源工作溫度Ti大變化范圍內(nèi)(Tmin≤Ti≤Tmax)直流穩(wěn)壓電源輸出電壓的相對變化的百分比值。溫度穩(wěn)定性公式見圖2-2-3。
直流電源極限指標(biāo)
?。?)大輸入電壓 是保證直流穩(wěn)壓電源安全工作的大輸入電壓。 ?。?)大輸出電流 是保證穩(wěn)壓器安全工作所允許的大輸出電流。
編輯本段并聯(lián)穩(wěn)壓電源
經(jīng)整流濾波后輸出的直流電壓,雖然平滑程度較好,但其穩(wěn)定性仍比較差。其原因主要有以下幾個方面: 1.由于輸入電壓不穩(wěn)定(通常交流電網(wǎng)允許有±10%的波動),而導(dǎo)致整流濾波電路輸出直流電壓不穩(wěn)定 2.由于整流濾波電路存在內(nèi)阻,當(dāng)負(fù)載變化時,引起負(fù)載電流發(fā)生變化,使輸出直流電壓發(fā)生變化 3.由于電子元件(特別是導(dǎo)體器件)的參數(shù)與溫度有關(guān),當(dāng)環(huán)境溫度發(fā)生變化時,引起電路元件參數(shù)發(fā)生變化,導(dǎo)致輸出電壓發(fā)生變化 4.整流濾波后得到的直流電壓中仍然會有少量紋波成份,不能直接供給那些對電源質(zhì)量要求較高的電路?! ∷?,經(jīng)整流濾波后的直流電壓必須采取一定的穩(wěn)壓措施才能適合電子設(shè)備的需要。常用的直流穩(wěn)壓電路有并聯(lián)型和串聯(lián)型穩(wěn)壓電路兩種類型
〖 誠信經(jīng)營,質(zhì)量可靠,進(jìn)口原裝,超大庫存,當(dāng)天付款,順豐速運(yùn),歡迎搶購 〗
〖 AB-模塊 〗 【加工定制:否,工作電壓:220(V),現(xiàn)貨/訂貨,產(chǎn)品圖片,產(chǎn)品價格,僅供參考】
〖 ABB-機(jī)器人 〗 【廈門航拓電氣有限公司 ,公司聯(lián)絡(luò)人:小吳 】
〖 施耐德-140Plc 〗 【Tel: 0592-5072236 】
〖 GE-IC693,IC697 〗 【Phone: 18965131356 】
〖 西門子-300,400 〗 【在線QQ: 1665532815 】
〖 ??怂共_-FBM,Ⅲ代,ⅢI代 〗【Fax: 0592-5072083 】
〖發(fā)那科-各系列,西屋-各系列,安川-各系列,霍尼韋爾-各系列 〗
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