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| 上架時(shí)間：2018-09-07 16:30:46 | 瀏覽量：455 | |
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AO204/SI AO204/SI AO204/SI
《聯(lián)系人；歐先生》 從工業(yè)領(lǐng)域到建筑工程，簡(jiǎn)單易用的開關(guān)模式電源非常常見。直流電壓隨后被緩沖至電池，成為隨時(shí)可用的安全電力供給。事實(shí)如此簡(jiǎn)單嗎？ 工頻電源工作總是離不開變壓器。輸出的直流電，不管是調(diào)節(jié)的還是未調(diào)節(jié)的，都是首先在次級(jí)產(chǎn)生的。相比之下，開關(guān)電源是首先在初級(jí)進(jìn)行整流，然后產(chǎn)生的直流電壓被分割為高頻，并通過一個(gè)小的高頻變壓器被傳送到次級(jí)（圖2）。開關(guān)電源允許寬范圍的輸入，還允許負(fù)載電流在0-100%的額定范圍內(nèi)連續(xù)工作。
圖2: 無(wú)輸入濾波器的開關(guān)電源原理圖 在思考開關(guān)電源的輸入電路原理時(shí)，首先注意到的就是整流器。如果輸入不是交流電，而是直流電，將會(huì)發(fā)生什么？假設(shè)所有模塊都能“準(zhǔn)確”運(yùn)行，那么幾乎所有開關(guān)電源都可以直流電或者交流電輸入。然而，當(dāng)發(fā)生故障，一臺(tái)不適用于直流電輸入的開關(guān)電源，很有可能導(dǎo)致火災(zāi)，因?yàn)樘幚砀邏褐绷麟姳绕鹛幚斫涣麟娨ｋU(xiǎn)得多。 RELIANCE ELECTRIC AUXILIARY CONTACT KIT K-607 K607 NEWAB RELIANCE ELECTRIC 500 HP AC DRIVE 608 AMPS 480 V #1 RELIANCE ELECTRIC TACH CONTROL BOARD 0-54355 reliance electric Variable Frequency Drive VTAC 15hp Reliance Electric HR2000 BLA-04 AC Servo drive 3RA2001 Reliance Electric HR2000 BLA-08 AC Servo drive 3RA2002 RELIANCE ELECTRIC (437162) PLC MODULE NIB RELIANCE ELECTRIC (437162 -R) PLC MODULE NIB Reliance Electric Remote I/O Interface 45C37A Reliance Electric 9 Slot Rack # 45C918 RELIANCE ELECTRIC 14C229 Master Isolated Ref Receiver RELIANCE ELECTRIC (437162 -X) PLC MODULE NIB Reliance Electric 0-52850 IRFA Drive Card New RELIANCE ELECTRIC 2GU41005 AC VS DRIVE GP-2000 5 HP Reliance Electric Induction AC Servo VZ3000 UVZ3202 OPC RELIANCE ELECTRIC 14C228 FIELD SUPPLY KIT NIB Reliance Electric Shark Programmer # 45C951 RELIANCE ELECTRIC 2DB2005 AC DRIVE 2DB2005 Reliance Electric 109081-102-W Card 109081102W NEW RELIANCE ELECTRIC 610266-29R MAXPAK III FIELD SUPPLY Reliance Electric Drive Board 8042510B 804.25.10B Reliance Electric Drive Controller 57406 Reliance Electric 8K Memory # 45C270 0702-03-015 ELECTRO-CRAFT E702 RELIANCE ELECTRIC MOTOR NEW RELIANCE ELECTRIC 0-52860-2 VSAC INVERTER ANALOG Reliance Electric 410403-24AWL Thyristor 41040324AWL RELIANCE ELECTRIC POWER SUPPLY MODULE 0-51903-A Reliance Electric 0-52712 115VAC Output Module 31C60A reliance electric 2-hp motor drive 460-v 60hz ac new BOX 8 RELIANCE ELECTRIC MOTOR BRUSH 404844-AU 404844AU Reliance Electric Drive Board 8041510A 804.15.10A LOT OF 4 RELIANCE ELECTRIC RESISTOR 63481XZA 8526 NEW Reliance Electric A40 Control Processor 45C410A 45C410 Reliance Electric Remote I/O Processor # 45C201 LNC Reliance Electric 4RC033 Encoder Cable NEW RELIANCE ELECTRIC 57410 ISOLATED ANALOG OUTPUT DCS MDL Reliance Electric 45C-201C/45C201?C I/O Processor RELIANCE ELECTRIC 1AC2003 AC VS DRIVE 3HP 3PHASE Reliance Electric 6 Slot Rack # 45C913 Reliance Electric 405919-43AW Diode 40591943AW NEW Reliance Electric Minipak Plus 14C13 5HP AC Drive Reliance Electric Shark Prog. 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NEW RELIANCE ELECTRIC RECTIFIER STACK ASSY. 86466 87R Reliance Electric 803623-R Battery Backup Unit 803623R Reliance Electric 0-52860 VSAA Drive Regulator 052860 Reliance Electric DVDT Interface Board 0-58706-23 Reliance Electric MD65 2HP AC Drive 6MDEN-3P0102 Expedited shipping available RELIANCE ELECTRIC CCRA 809.44-00 CONTROL CARD Reliance Electric 57400-1 115 V AC/DC Input Module RE **NIB** Reliance Electric Transistor 602909-123AW Expedited shipping available RELIANCE ELECTRIC DFSA MODULE 0-52823 New Reliance Electric 0-51377-35 Master Connection One-day shipping available New Reliance Electric 0-51377-38 Test Card One-day shipping available Reliance Electric 0-52851 CSSA Digi Card Sequencing New New Reliance Electric 0-54394 Base Driver Card One-day shipping available Reliance Electric O-51829-2 LVTC Drive Module Reliance Electric 0-57413-1A/57C4?13A Common Memory Unit RELIANCE ELECTRIC RESISTOR Reliance Electric Rectifier 402421-202AW Expedited shipping available **NIB** Reliance Electric Transistor 402410-221AW Expedited shipping available Reliance Electric Cardpak Amplifier 0-49022- Module RELIANCE ELECTRIC REMANNED PLC MODULE 0-52824 Reliance Electric 0-57413-1/57C41?3A Common Memory Unit RELIANCE ELECTRIC REMANNED PLC MODULE 0-52876 RELIANCE ELECTRIC 0-51820-2 PLC MODULE NIB NEW RELIANCE ELECTRIC BRUSH SET 418022-1AK SET OF 8 RELIANCE ELECTRIC 0-52002-2 RELAY CARD 0520022 NEW NEW RELIANCE ELECTRIC SUPPRESOR 600686-3AC RELIANCE ELECTRIC REMANNED PLC MODULE 0-54355 RELIANCE ELECTRIC 0-52860-2 VSAC PLC MODULE NEW RELIANCE ELECTRIC SUPPRESOR 600686-3RR RELIANCE ELECTRIC 0-52859-2 VSDC PLC MODULE RELIANCE ELECTRIC TRANSFORMER 64670-11T 6467011T NEW NEW RELIANCE ELECTRIC THYRISTOR 410403-4Y 7139 Toledo Scale Reliance Electric KC577140 BCD Output Mod Expedited shipping available RELIANCE ELECTRIC REMANNED PLC MODULE 0-52823 RELIANCE ELECTRIC CRCG REGULATOR MODULE 0-51851-6 Reliance Electric 0-51874 SSCA Module Reliance Electric 0-51884 LSCA Module Reliance Electric 0-52808 OLVA Overload Relay Module Reliance Electric 2DB4010 VS Drive DYNAMIC BRAKING KIT RELIANCE ELECTRIC SUPPRESSOR 603475-S 603475S NEW Reliance Electric S-76118B/57410 Isolated Analog Output Reliance Electric Transistor 602909-218AW Expedited shipping available Reliance Electric RE DIVA Analog Board Divider 0-52804 Reliance Electric 0-51829-2 LVTC Linear Voltage Module Reliance Electric S20-202P3C1000/?S20202P3C1000 One-day shipping available NEW RELIANCE ELECTRIC RELAY 69326-4R Reliance Electric AutoMate I/O Rail 45C1A Expedited shipping available Reliance Electric 0-52862/052862 PCB Class WI Inverter One-day shipping available RELIANCE ELECTRIC 0-51818-2 PLC MODULE NIB Reliance Electric 0-57002 Instrument Interface 057002 NEW RELIANCE ELECTRIC RELAY BASE 600434-5R Reliance Electric 0-52860-2 VSAC Inverter 0528602 Reliance Electric 0-52862 PCB Class WI Inverter 052862 Reliance Electric 0-52869 VCDA Class WI Inverter 052869 (5) RELIANCE ELECTRIC 405919-35AR 9048 DIODE STUDS NEW Expedited shipping available Reliance Electric VC-90 Vector Spindle Drive Manual RELIANCE ELECTRIC 608870-48R PC GATE COUPLING - NEW NIB RELIANCE ELECTRIC 78090-60AC Reliance Electric Rectifier Network Assy - MaxPak RELIANCE ELECTRIC K-604 AUXILIARY CONTACT KIT **NIB** Reliance Electric Transformer 411027-51S 41102751S NEW **NIB** Reliance Electric Resistor 425.09.31 Expedited shipping available Reliance Electric 0-51486-17 Relay Input 05148617 RELIANCE ELECTRIC 2SR41800 SNUBBER RESISTOR RELIANCE ELECTRIC 0-51445 CONTROL BOARD **XLNT** NEW RELIANCE ELECTRIC 78178-11S 7817811S DIODE ASSEMBLY |
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