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電源選型推薦

整個DTU系統(tǒng)的電源解決方案，主要考慮到不間斷供電的問題，所以需要雙電源供電的一個供電形式，主流的供電方式一般是有兩部分組成，一部分是大功率300W或者500W的AC/DC充電電源，這個電源一般兩路輸出，一路給后級的板卡進(jìn)行供電，一方面給后級的蓄電池或者是超級電容進(jìn)行充電；另外的一部分就是蓄電池或者超級電容，這個主要是在市電斷電的情況下，保證整個系統(tǒng)的正常運(yùn)行。另外，電網(wǎng)對于EMC方面的要求比較苛刻，特別是浪涌方面，需要完全滿足4級的要求。主電源和蓄電池都掉電時，系統(tǒng)掉電保持時間500mS以上。

根據(jù)上面的應(yīng)用描述，我們推薦選用金升陽MBP500-2A54D54的接線式電源，它具備電池充電功能，可對48V 鉛酸電池充電；工業(yè)級工作溫度：-40℃～+70℃；2500VAC 高隔離電壓；大瞬時過功率達(dá)540W；優(yōu)越的EMC性能；接線式安裝。

另外，如果鉛酸電池的電壓值為24V，還可以選用金升陽公司的MBP300-2A27D27的接線式電源，可對24V的鉛酸電池充電，穩(wěn)態(tài)功率達(dá)到351W。
電源是各種電子設(shè)備必不可缺的組成部分,其性能優(yōu)劣直接關(guān)系到電子設(shè)備的技術(shù)指標(biāo)及能否安全可靠地工作。目前常用的直流穩(wěn)壓電源按功率管的工作方式分為線性電源和開關(guān)電源兩大類。線性穩(wěn)壓電源亦稱串聯(lián)調(diào)整式穩(wěn)壓電源,電路技術(shù)比較成熟。具有低紋波、高穩(wěn)壓性能等優(yōu)點。但由于必須使用工頻變壓器,且調(diào)整管工作在線性放大區(qū),因而體積大和重量大、效率低。開關(guān)電源調(diào)整管工作在高頻開關(guān)狀態(tài),功率損耗小,且使用小體積的高頻變壓器替代笨重的工頻變壓器來實現(xiàn)電壓變換和電網(wǎng)隔離。
為解決傳統(tǒng)的PWM型變換器的上述問題,可采用諧振、準(zhǔn)諧振、多諧振以及具軟開關(guān)的PWM型變換器。這些變換器吸收、利用了PWM型變換器中的寄生參數(shù)或外加電感、電容作為諧振參數(shù),使變換器中的功率開關(guān)在零電壓或零電流下開通和關(guān)斷,開關(guān)兩端的電壓或經(jīng)過開關(guān)的電流是正弦或半正弦波形。因此大大減少開關(guān)的瞬問損耗和開關(guān)應(yīng)力以及電磁干擾和射頻干擾.使其工作頻率可進(jìn)一步提高到1Mhz以上，效率達(dá)90%以上。再加上小型片狀電子元器件,包括磁性材科,例如:平板型變壓器等以及表面安裝技術(shù)以及散熱方式的改進(jìn)，就使電源系列、標(biāo)準(zhǔn)化、模塊化成為現(xiàn)實。

Cutler Hammer RD320T36W 2000 Amp 600 Volt Circuit Breaker LSIG
UN CUTLER-HAMMER SPB65 600V 2000A DIGITRIP L/S/I/G INSULATED CIRCUIT BREAKER
UN CUTLER-HAMMER MWI625 600V 2500A DIGITRIP 520 INSULATED CIRCUIT BREAKER
UN CUTLER-HAMMER MDSC50 600V 5000A DIGITRIP 520 INSULATED CIRCUIT BREAKER
UN CUTLER-HAMMER MDSC4N 600V 4000A DIGITRIP 520M INSULATED CIRCUIT BREAKER
UN CUTLER-HAMMER MDSC16 600V 1600A DIGITRIP 520M INSULATED CIRCUIT BREAKER
UN CUTLER-HAMMER MDS616 600V 1600A DIGITRIP 1150 INSULATED CIRCUIT BREAKER
UN CUTLER-HAMMER DISTRIBUTION TRANSFORMER 400 KVA 4160 480Y/277 MCH03236
UN CUTLER HAMMER 2500 KVA DRY TYPE TRANSFORMER
SQUARE D PEF1636LSIG - 1600 AMP - PE161600RP PEF 1636LSIG CIRCUIT BREAKER
SL50W430 Cutler Hammer Contactor Vacuum 4160 Volt RM
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RD320T32W CUTLER HAMMER Circuit Breaker 2000A LSI 65K RES2000LSI 20RES10T
PERFECT CUTLER HAMMER SERIES C RD316T36W W/ DIGITRIP 310 TRIP UNIT RES1600LSIG
Olsun 2500/3333 KVA Dry Transber HV 4160 LV 480Y/277 Digital Temp Controller
Olsun 1500/2000 KVA Dry Transber HV 4160 LV 480Y/277 Digital Temp Controller
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MDSC303HEA 305GAMNN2E CUTLER HAMMER MAGNUM DS 3000 AMP 635 V MDSC303 MDS303
Magnum MDC30 3000 AMP  CIRCUIT BREAKER CUTLER HAMMER LSIG
HERMETIC CENTRIFUGAL REFRIGERATION
EATON/Cutler-Hammer SVX9000 Series VFD PX0650402N 380-500V 650Amp - SPX9000
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Eaton Cutler-Hammer CPS250208YAG One Year Warranty !
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Eaton Cutler Hammer SV9150AN-6M0B00 150HP AC Drive SV9000 150 HP , 575 VAC
EATON CUTLER HAMMER MDS8403WEA 4000 AMP 600 VOLT 3 POLE CIRCUIT BREAKER --SES
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Eaton Cutler Hammer 50VCP-TR25 Circuit Breaker
EATON CUTLER HAMMER 400 750 900 HP SOFT START T811V65N3D 1200 AMP CNDC312T33W
EATON CUTLER HAMMER 150VCP-TR25 vacuum circuit breaker
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Cutler-Hammer Type SL50W430, Model C, 400 amp, 2400 VAC Vacuum Contactor
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Cutler-Hammer SPB65 600V 2000Amp DIGITRIP810 LSIG INSULATED CASE CIRCUIT BREAKER
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Cutler-Hammer SCB56074 Pow-R-Line Switchboard 3 Sections with (2) CRDC320T36W
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CUTLER-HAMMER MDSC5N 5000A FRAME CIRCUIT BREAKER DIGITRIP 520M LSI 4000A TRIP
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Cutler-Hammer DS II-840 4000A Digitrip RMS LSG E/O 120VAC Breaker DSII-840 DS2
Cutler-Hammer BPD5007S003 800Amp Pow-R-Way III Busway CB Plug -  Surplus
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Cutler-Hammer / Westinghouse PB32500 - Certified Reconditioned
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