IC693ALG221

 單相電機(jī)的正反轉(zhuǎn)原理是基于磁場(chǎng)的旋轉(zhuǎn)方向與電流方向的關(guān)系，通過(guò)改變電流方向來(lái)實(shí)現(xiàn)電機(jī)的正反轉(zhuǎn)。

  單相電機(jī)通常由定子和轉(zhuǎn)子兩部分組成。定子包括鐵芯和繞組，繞組中有一個(gè)主繞組和一個(gè)起動(dòng)繞組，主繞組連接電源，起動(dòng)繞組連接啟動(dòng)電路。轉(zhuǎn)子包括鐵芯和導(dǎo)體材料。

  當(dāng)單相電機(jī)接通電源后，電流通過(guò)主繞組，產(chǎn)生一個(gè)交變磁場(chǎng)。由于起動(dòng)繞組中的線圈與主繞組線圈的電流相位差90度，所以產(chǎn)生一個(gè)旋轉(zhuǎn)磁場(chǎng)。該旋轉(zhuǎn)磁場(chǎng)的磁通量作用在轉(zhuǎn)子上，使得轉(zhuǎn)子受到旋轉(zhuǎn)力矩的作用，從而轉(zhuǎn)動(dòng)起來(lái)。

  如果需要改變單相電機(jī)的轉(zhuǎn)動(dòng)方向，可以通過(guò)改變電流的方向來(lái)實(shí)現(xiàn)。在單相電機(jī)啟動(dòng)時(shí)，起動(dòng)電路中的電容或電阻會(huì)使起動(dòng)繞組中的電流產(chǎn)生一個(gè)相位差，從而使旋轉(zhuǎn)磁場(chǎng)的旋轉(zhuǎn)方向與轉(zhuǎn)子轉(zhuǎn)動(dòng)的方向相同。如果想要反轉(zhuǎn)單相電機(jī)，只需改變起動(dòng)電路中的線圈的接線方式，即可改變起動(dòng)繞組中的電流方向，從而改變旋轉(zhuǎn)磁場(chǎng)的旋轉(zhuǎn)方向，實(shí)現(xiàn)單相電機(jī)的反轉(zhuǎn)。

  需要注意的是，單相電機(jī)的正反轉(zhuǎn)需要通過(guò)啟動(dòng)電路實(shí)現(xiàn)，一旦單相電機(jī)轉(zhuǎn)速達(dá)到額定值后，需要切斷啟動(dòng)電路，否則會(huì)影響電機(jī)的正常運(yùn)行。同時(shí)，在改變單相電機(jī)正反轉(zhuǎn)時(shí)，也需要注意電路的安全，避免產(chǎn)生電擊或火災(zāi)等危險(xiǎn)。

ABAXIS PICCOLO 100-1000 PORTABLE CHEMISTRY ANALYZER

COHERENT INNOVA 90 LASER With POWER SUPPLY/CONTROLLER

CRYOTIGER 1 T1102-13-000-30 CRYOGENIC REFRIGERATION SYS

AE/AMAT HFV 8000 3155083-151 5KW RF Generator

LECROY IF001UTA-X SAS-SATA-INFUSION PROTOCOL ANALYZER

EDWARDS QDP40/QMB250F DRY PUMP/MECHANICAL BOOSTER

ADEPT 10332-22000/30332-22350 SIO/IDE BOARD ROBOT

NESLAB HX-50 1250W/115V RECIRCULATING CHILLER

THERMO NESLAB MERLIN M33 RECIRCULATING CHILLER

OLYMPUS WM-D60 MOBILE WORKSTATION W / SCOPE HANGER

PFEIFFER VACUUM TPH 180H U DN 100 ISO-K,2P TURBO PUMP

Thermo Neslab Merlin M25 115V Recirculating Chiller

OLYMPUS WM-D60 MOBILE WORKSTATION W / SCOPE HANGER

OLYMPUS WM-D60 MOBILE WORKSTATION W / SCOPE HANGER

LEYBOLD MAG.DRIVE L TURBO PUMP CONTROLLER

VALHALLA SCIENTIFIC 2301 DIGITAL POWER ANALYZER
PROGRAMMABLE SINGLE PHASE

OLYMPUS WM-DP1 (DOUBLE WIDE) MOBILE WORKSTATION

TDI/JUNIPER ERX-2400-PWR 19" 3U MPS POWER SUPPLY RACK

ASPECT T-1 24 PT BYPASS UNIT W/ RING VOLTAGE GENERATOR

ASSOCIATED RESEARCH 6554SA QUADCHEK ANALYZER W/GPIB

ENI DCG-100 DCG6M-A112000010P 5KW DC PLASMA GENERATOR

OLYMPUS MAJ-1430 ENDOSCOPY VIDEO PIGTAIL CABLE

ALCATEL 2033 DUAL STAGE ROTARY VANE VACUUM PUMP

HP 6033A 0-20V/0-30A 200W DUAL DC System Power Supply

ADEPT 10332-22000 SIO2/IDE HD UPGRADED TO 30332-22365

Brook Hansen WD132SD 5.5 KW/3-PH/RPM 1740 AC Motor NEW

EBARA HV-8 8" CRYO TURBO VACUUM PUMP

GIGA-TRONICS 8542C DUAL CHANNEL UNIVERSAL POWER METER

ADEPT PA-4 30336-31000R ROBOT CONTROLLER CHASSIS

STRYKER ENDOSCOPY X6000 (REF 220-185-000) LIGHT SOURCE

SIEMENS 6ES7414-2XG01-0AB0 CPU 414-2 Module Simatic S7

BARNES SE51AU SUBMERSIBLE NON-CLOG .5 HP PUMP (NEW)

NOVELLUS 02-103970-00 MODULE CNTRLR, P166/64 CONTROLLER

FLUKE 123 Series INDUSTRIAL SCOPEMETER 20 MHz

NOVELLUS 02-133876-00 ASSY SYS CONT, P166/64 CONTROLLER

CTI CRYOGENICS 8112099G009 CONTROLLER CABLE 96G23 AH

STRYKER ENDOSCOPY Q5000 (REF 220-180-000) LIGHT SOURCE

HP 54111D 2CH / 500MHz Digitizing Oscilloscope

AE / RFPP LF-5 500W Water Cooled RF Generator

ALCATEL MDP 5011 CERAMIC MOLECULAR DRAG PUMP 7.5 LPS

CTI Cryogenics Cryo-Torr 7 High Vacuum Pump (HELIX)

Adept 10332-11400 MI-3 Motion Process Controller Board