IC200BEM002CA
IC200BEM002CA
配電箱的安裝。必須確保配電箱的底部和地面的距離符合設(shè)計施工具體規(guī)范的要求。剝削導(dǎo)線時嚴(yán)格避免損壞導(dǎo)線,并將導(dǎo)線壓頭加以認(rèn)真固定,進行端子排和多股導(dǎo)線的連接時,應(yīng)適當(dāng)設(shè)置一定數(shù)量的壓線端子,經(jīng)過統(tǒng)一掛錫后連接在端子排上,若進行壓線孔的連接時,將多股導(dǎo)線通過涮壓錫后,再利用頂絲進行壓接,避免發(fā)生剪斷導(dǎo)線股數(shù)現(xiàn)象。將配電箱內(nèi)閘具設(shè)施和支線進行連接對應(yīng),并設(shè)置卡片框架,上面標(biāo)明各線路和各回路的名稱。
防雷接地的安裝。將輕型彩鋼屋面作為避雷網(wǎng)帶的設(shè)置時,并科學(xué)合理進行彩鋼板的安裝。一般多采用樁基筋、基礎(chǔ)筋作為避雷的接地極,同時通過柱筋和避雷網(wǎng)進行有效連接。如果出現(xiàn)斷接卡測試點不穩(wěn)定的現(xiàn)象,應(yīng)設(shè)置為接地極測試點的形式,應(yīng)采用4×40鍍鋅扁鐵作為連接測試點。利用基礎(chǔ)鋼筋做接地極時,將基礎(chǔ)內(nèi)、外兩根主筋圈內(nèi)搭接處加以焊接,并將圈內(nèi)橫縱向主筋和外圍內(nèi)外主筋加以焊接,對于有樁基的樁筋應(yīng)和基礎(chǔ)主筋進行連接,同時依據(jù)設(shè)計圖紙要求將指定柱筋采用外側(cè)主筋和基礎(chǔ)主筋焊接形成引下線。各焊接點禁止點焊,應(yīng)進行雙面焊接,保證為6倍鋼筋直徑的焊接長度。
電氣安裝質(zhì)量直接影響整個建筑工程的質(zhì)量,甚至關(guān)系到人們的生命財產(chǎn)安全,因此,必須將電氣安裝工程作為一項重要任務(wù)來抓,始終把其置于關(guān)鍵位置上,努力加強電氣安裝工程質(zhì)量管理水平的提高,以確保電氣工程的安全性和可靠性,全面保證建筑整體工程健康、穩(wěn)定運行。
D類放大器的架構(gòu)有對稱與非對稱兩大類, 在此討論的D類功放針對的是對功率、體積都非常敏感的便攜式應(yīng)用,因此采用全電橋的對稱型放大器,以充分利用其單一電源、系統(tǒng)小型化的特點。D 類功率放大器由PWM 電路、開關(guān)功放電路及輸出濾波器組成
采用了由比較器和三角波發(fā)生器組成的固定頻率的PWM電路,用輸入的音頻信號幅度對三角波進行調(diào)制,得到占空比隨音頻輸入信號幅度變化的方波, 并以相反的相位驅(qū)動上下橋臂的功率管,使功率管一個導(dǎo)通時另一個截止,再經(jīng)輸出濾波器將方波轉(zhuǎn)變?yōu)橐纛l信號,推動揚聲器發(fā)聲。采用全橋的D 類放大器可以實現(xiàn)平衡輸出,易于改善放大器的輸出濾波特性,并可減少干擾。全橋電路負(fù)載上的電壓峰峰值接近電源電壓的2 倍,可采用單電源供電。實現(xiàn)時,通常采取2 路輸出脈沖相位相反的方法?! ?/span>
D 類功率放大器的工作過程是: 當(dāng)輸入模擬音頻信號時,模擬音頻信號經(jīng)過PWM 調(diào)制器變成與其幅度相對應(yīng)脈寬的高頻率PWM 脈沖信號,控制開關(guān)單元的開/關(guān),經(jīng)脈沖推動器驅(qū)動脈沖功率放大器工作,然后經(jīng)過功率低通濾波器帶動揚聲器工作。
比較器電路采用低功耗、單電源工作的雙路比較器芯片LM311 構(gòu)成。此處為提高系統(tǒng)效率,減少后級H 橋中CMOS 管不必要的開合, 用兩路偏置不同的三角波分別與音頻信號的上半部和下半部進行比較,當(dāng)正端上的電位高于負(fù)端的電位時,比較器輸出為高電平,反之則輸出低電平。這樣產(chǎn)生兩路相互對應(yīng)的PWM波信號給后級驅(qū)動電路進行處理,雙路比較電
此處值得注意的是將上半部比較處理為音頻信號接比較器的負(fù)向端、三角波信號接正向端;下半部比較則相反,這樣形成相互對應(yīng),在音頻信號的半部形成相應(yīng)PWM 波時,另半部為低電平,可保征后級H 橋中的CMOS 管沒有不必要的開合,以減少系統(tǒng)功率損耗。電路以音頻信號為調(diào)制波,頻率為70kHz 的三角波為載波,兩路信號均加上2.5V 的直流偏置電壓,通過比較器進行比較,得到幅值相同,占空比隨音頻幅度變化的脈沖信號。
花費數(shù)百元買一本書, 便可以獲得別人的智慧經(jīng)驗. 然而, 如果你全盤模仿, 不加思考, 那有時就會畫虎不成反類犬.
年輕人欠缺經(jīng)驗, 但請不要忘記:年輕是你最大的本錢. 不要怕犯錯, 也不要畏懼挑戰(zhàn), 你應(yīng)該堅持到底, 在出人頭地的過程中努力再努力.
只要有堅強的持久心, 一個庸俗平凡的人也會有成功的一天, 否則即使是一個才識卓越的人, 也只能遭遇失敗的命運.
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siemens6AV90201DB00
IC697BEM733
80190-320-03-R
DB-2620A
XPEWHT-L1-7A3-P4CREELTD
JX-300XDCSSP3647路繼電器開關(guān)量輸出卡
AllenBradleycontrolpanel/combostarterSize1
6ES7315-2AG10-0AB0
815DOV16AB815DOV16
TSXEFACC2030
SI3HAC036163-001Repairkitaxis4
NIMP01低價銷售貝利模塊
VDIX2603
3HNP01432-1PUSH-INCONNECTOR
275806-EU
LTE120.6KVATyp:0608750040
140CPU11302
TVD1.2-15-03
意大利ANSALDO主板CONDBE211QS50417C
509BOD17AB509BOD17
NACHIRBX1100G
AB,ABBULLETIN1326ACSERVOMOTOR1326AB-B520E-2?1
1775-S5
IC660BBA026
YOKOGAWADCSSI11*B站內(nèi)通信卡
PROSOFTMVI56-GSC
Cutler-Hammer1242ABRemoteI/OP/N:91-01761-00
YASKAWA安川伺服電機SGMSH-20ACA61
Allen-BradleyCompactLogixDEVICENET
PM-0044-005
AS-BDAP-250C
3HNP03143-1GROOVEBALLBEARING
590+主板/590主板AH470372U002
A06B-0034-B077
D/APRODUCTIONDCA-RM12
XPGWHT-L1-5D2-R3xCREELTD
Coil~AllenBradley~#71A288~New
BENTLYNEVADA128031-01C
施耐德PLCTSX08CD08F6D
Kit,Exhaust,bottom210-04251-00Mattson
GEFANUCIC693CPU313
DAI03
TSXP57102M
REXROTHVT2000S41NSPPVT2000S41
3HAW050008612-015
APOGEEAutomation控制板544-305
1756-CNBR
YamatakeHoneywell80360300-001
ABB終端模塊3BSE013230R1-TU810V1
2098-IPD-030-DN
DS200DCFBG1BLC
PARKERPNEUMATICSCHRADERBELLOWS-PMAX=10BAR39104P
E2E-X1C1
150A09NBAB150A09NB
1336F-B030-AA-EN
ES100S
NewinBox1756-M08SEAllenBradley1756M08SEN140
3HAW050008615-010
1C31150G01
DSQC307
SIEMENS3SB3000-1BA20開關(guān)
AB1786-RPFM模塊
PPC-R22.1N-T-V2-NN-NN-FW
FBM202電纜P0916DW
140plc140DDI35300
501189880
RPXE0060-1C400V60A
IMTECACCULINE990001703
140DAO84210
B&R3AT350.6
ALLENBRADLEY802T-W2NSFP802TW2
JEPMC-MC210
安川伺服電機SGMGH-30ACA6CYASKAWA
EDWARDSQDP40GMEPMPUMPGMEPMN2
AC SERVO MOTOR SGM-04A314D
802TBTPAB802TBTP
WDAL2170-00
MDVX-018S01
英國歐陸eurothermT2550系列2路模擬量輸出模塊AO2
1791-16AC120VAC
96DM6001X-C1NONVOLMEMORY1
安川電機USAFED-03D21
1P6SN1111-0AA01-1AA
歐姆龍R88A-MCW151-E
IC697CBL700
800MRH3104BLAKAB800MRH3104BLAK
VMIVME-7750
620-0071LogicManagerModule
IIMKM02A低價銷售貝利模塊
1793-IE4S
SMCMXS16-30B-MSPSA?PCMXS1630BMSPSAPC
HSM01.1-FW
9907-252
PIONEERPM1253AL-6-3-Z03
BBC METRAWATT HEIE210044-R1 USPP HEIE210044R1
ABE7H16R21
正品YASKAWA安川伺服驅(qū)動器SGDM-A5ADA
E0451-521-094
AllenBradleyAB1771A3B1Chassis12SlotI/OPLC5*
334A
ALLENBRADLEY1756-IB16CONTROLLOGIXDCINPUTMODULENW
3HAC025097-001
ABBACS800U1-0009-5+P901?
AB模塊1746SC-NI8U
GENERIC 66-20134-1 USPP 66201341
A16B-2203-0073/02A
802TAMTAB802TAMT
3HAW107700347RACK_Atlanta_L=1000module3
VWR986962
ALLENBRADLEY1336T-C007-AN-GTO*NEW*
HONEYWELL51403776-1002
XMLEZW-0-30F-U20-B0H0001CREELTD
1785-LT
140CRP93200
AS-PLS4
140CRP93200
6ES7414-3EM05-0AB0
367233895
140DDI84100
MPC750
1756-N2
TM-1743,ALLEN-BRADLEY2711-K9C1PANELVIEW900
DSCA114
AllenBradley1747-L551/B1747L551SLC5/05Controller
1336F-B025-AF-EN-L6
TSXAEY800
AllenBradleySize0starterLotof2!coil#70A11
Verteq1075507
HE693THM884M??
140CPS11420
AB1756-DNB1756DNBDEVICENET
AB1784-KTX1
5086-1702
TEACHINGPENDANTSUSCORP.
美國ABAllen-Bradley191.001771-IFECPU處理器
Allen-Bradley-451746-NIO4VA
CAT1305-BA06A
140ARI03010
ABSLC500OutputModule1746-OB32SeriesC
AllenBradley1771-OD16
USAGED-44A22SE
專業(yè)代理SGMG-75A2AAB安川伺服電機
GENERAL ELECTRIC DS3800HACA1A1A USPP DS3800HACA1A1A
GEIC697CPX7722
XRCWHT-L1-5A-P3CREELTD
ABBREF615保護裝置
IC670ALG230
1756-IR6I
SMP-E211-A11
140ACI03000
安川伺服放大器SGDA-04APSGDA-04AS有
MVME224A-3
6ES5373-0AA41或6ES5373-0AA41板卡
安川伺服驅(qū)動器SGDV-R90F01A
1785-L80E/E
140NOE77100
0020-31655
MOTOROLA摩托羅拉MVME2604712I/O1
60DAYSWARRANTY!FlexLogixControlNetCommModule
TC512V1
1746-P4
REXROTHDRE10-32/100YMDRE1032100HYDRAULICVALVE
MM-4M-R
1336F-AJA3
W609-004
ANALYZERE1900903100481639
140ACI03000
AGILENTZORBAXRAPIDRESOLUTION300SB-C18865973-90250
IS200TTURH1B
IMDS003
ALLEN
2711P-T6C3A
ALLEN BRADLEY 800EM-KM21 NSPP 800EMKM21
YASKAWAJANCD-1021JANCD-IO21YASKAWAI/OBOARD
APSAF03E32086
CT變頻器UNI340115KW另有UNI340218.5KWUNI340322KW
EPDG2
3HNA011053-009CABLEAC-AM2CCBS30+6
FBM217
12FISHERBRAND2.5MLCLASSAVOLUMETRICPIPET13-650-2Y
Allen-Bradley-801746-P4A
BALZERSPKD40703
ABPOWERMODULE40382-074-53
FoxboroInvensysModulePN.FBM24210pcs
ABB3HAC17484-7/001
Hydraulikpumpe3518555M91
140CPS11100
3HNA016394-001BRACKET
51305072-300I/OCard,CLCNB,EC
CS513K011
SP075S-MF1-10-1E1-2S阿爾法
FOXBOROFBM05P0400YFfbm5
140ARI03010
PP845A
IC697MDL750
PHOTOSWITCH871TM-B15N30-N3NSFP871TMB15N30N3
KAWASAKI50999-2143
AS-M84A-002
3HNA009656-001PILOTOPERATED3/2VALVE
1746-NI8
ABB3HNE00313-11
AB1771-OWOutputModuleSelectableContact1771OW
1771-IR
RexRoth4WRA10E30-22/G?24N9K4HydraulicValve
SIEMENS 6EC1-000-0A NSPP 6EC10000A
Siemens6SE6400-4BD22-2EA1
發(fā)射機875ec-b2f-ac個
西門子PLC6ES7216-2BF22-0XB0
PERCEPTRON926-0220A2854
1794-PS13
?Micro?Motion?IFT9701I3N3U?Flow?Transmitter
FOXBOROP0903ZE接線端子
3HAB8101-18/08C
ALLEN BRADLEY 1747-SDN NSFP 1747SDN
1746-OW16
140ACO02000
AB1746-IA16配件
2711E-NT2
AllenBradleyAB1771QDCPlasticMoldingModuleSer:D
169MMR169Plus-100P-1204
ALLENBRADLEYDEVICENET1734-OW2OUTPUTMODULE
JZNC-XPP02B
ALLEN BRADLEY 2711-T9C8 USPP 2711T9C8
Pre數(shù)字量輸出模塊TSXDSY08R5
140DDO35300
XP345450-311SPRING
BOSCH//BTV20.2PA-64B-33C-D-FW
VDIXG3033P
MVME147-0131卓凱電子0591-62182520217IF2