ahlburuto
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« on: May 13, 2008, 06:01:59 PM » |
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Is it possible to rewind 3phase motor to a single phase supply?? Ang practice kasi dito sa amin eh lagyan ng starting capacitor yung isang leg ng 3phase motor tapus papatakbuhin sya sa single phase supply.
BR
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Walang GUYAM kung walang GUGUYAMEN...... 
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The Philippine Electronics and Technology Forum
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« on: May 13, 2008, 06:01:59 PM » |
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ahlburuto
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« Reply #1 on: May 14, 2008, 06:52:45 AM » |
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ahlburuto
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« Reply #2 on: May 24, 2008, 11:37:52 AM » |
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mukhang walang me idea regarding dito sa post ko ah.... hmmmmmmm..... bakit kaya? 
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miGs
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« Reply #3 on: July 31, 2008, 10:39:01 AM » |
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Is it possible to rewind 3phase motor to a single phase supply?? Ang practice kasi dito sa amin eh lagyan ng starting capacitor yung isang leg ng 3phase motor tapus papatakbuhin sya sa single phase supply.
BR
You mean run a 3phase motor from single phase supply? (rewind kasi nakalagay sa post mo)... Yung sinasabi mo na naglalagay ng capacitor is the simplest trick... by this you are creating another phase for the 1-phase supply. But, please note of the limitations. You can't run your motor to full load rating. Dapat mga 50% lang. Bakit? Dahil the motor is running under severely unbalanced condition. Idadag mo pa ang mga "negative sequence currents".. yung mga negative sequence currents na yan galing yan sa 1phase supply. Negative torques lang ang dulot ng negative sequence currents in the motor...which would cause heating in the motor winding without doing useful work. Overheat at insulation damage ang labas nito kapag nagkataon... The best way is to use VFD or Phase converters (may static at rotary phase converters).
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ahlburuto
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« Reply #4 on: August 24, 2008, 10:38:04 AM » |
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Anu yung pinagkaiba ng static sa rotary?
regards
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tony v.
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« Reply #5 on: November 04, 2008, 12:02:02 PM » |
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Is it possible to rewind 3phase motor to a single phase supply?? Ang practice kasi dito sa amin eh lagyan ng starting capacitor yung isang leg ng 3phase motor tapus papatakbuhin sya sa single phase supply.
BR
Pede cguro, pero mas mabagal ang rotation kaysa sa ordinary single phase motor at ang power ay reduced to 60 percent means that if the plate rating of the motor is 1 kilowatts magiging 300 watts na laang ang kayang torque nito. Magiging malaki din ang losses dahil high current ang start up para paiikotin ng isang pair of stator winding ang malaking rotor na usaully ay pinaiikot ng tatlong pares ng windings.
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insomartin
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« Reply #6 on: April 24, 2009, 08:29:35 PM » |
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kailangan mo nang converter. 1 phase to 3 phase. lalaki current consumption mo pag nag converter ka. USUALLY MAS MAHAL PA YUNG CONVERTER. replace the motor instead. but that varies. check mo kung ano kaya nang budget.
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insomartin
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« Reply #7 on: April 24, 2009, 08:33:19 PM » |
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static converter is solid state converter. igbt/mosfet gamit kapag rotary, mechanical... (not recommended anymore)
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robbietan
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« Reply #8 on: May 01, 2009, 10:13:53 PM » |
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Is it possible to rewind 3phase motor to a single phase supply?? Ang practice kasi dito sa amin eh lagyan ng starting capacitor yung isang leg ng 3phase motor tapus papatakbuhin sya sa single phase supply.
BR
depends on how large your motor is. large motors, having more than 10HP, are more efficiently run in a 3 phase supply than in a single phase supply.
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ty-rap
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« Reply #9 on: May 12, 2009, 03:47:07 AM » |
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Pwede mong i-rewind ang isang 3 phase motor to a single phase...kaya lang marami kang factors na gagamitin..ex.magnet wires sizes, you have to make a starting and running windings,motor core slots,chord factors and etc.
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akosiikem
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« Reply #10 on: May 12, 2009, 09:42:58 AM » |
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Pwede kaso d magtatagal yung motor.
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ty-rap
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« Reply #11 on: May 13, 2009, 02:52:46 AM » |
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Pwede kaso d magtatagal yung motor.
Kumporme po sa computation nyo sir about the core area and the likes..kung meron po kayong Motor rewinding Computation and analysis book eh same as brand new rin po ang motor..
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akosiikem
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« Reply #12 on: May 13, 2009, 11:09:28 AM » |
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Base sa experience ko hindi nagtatagal ang ni-rewind na motor o hindi na katulad ng dati ang life nya. Yung 100HP motor ng compressor namin sa planta wala pang isang linggo sunog na agad yung winding nya. Siguro sa quality ng wire na ginamit or baka sa pinag paparewind namin.
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Electrofun_01
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« Reply #13 on: May 13, 2009, 01:24:50 PM » |
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If you want to convert your 3 phase motor to single phase you have to consider the size of the motor (core area) pag pinagkumpara mo cla mapapansin mo na mas malaki ang mga single phase kesa sa 3 phase at the same horsepower pwede compute mo lang yung winding saka size ng wire pero di mo makuha yung maximum power nya and also you have to use heavy insulation para sa magnet wire na gagamitin may nabibili na ring semiconductor na starting switch as a replacemnt for the centrifugal switch for starting. mahirap kc mag lagay ng centrifugal switch sa converted na 3 phase motor
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ty-rap
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« Reply #14 on: May 15, 2009, 02:54:18 AM » |
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Belden Magnet Wire po ang dapat...gawa sa Korea..mas magandang klase po ang wire nya and nsa standard ang sizes and ang gamit po naming Elct'l Varnish eh yun Epoxy Varnish na galing naman sa U.S.A,so maganda po ang kinalalabasan ng narewind na motor @akosiikem.
Tama po kayo Sir Electrofu malaki nga po ang core area ng Single phase motor...kasi nga po dahil sa starting winding...ang ginagamit kong centrifugal switch nyan eh madali lang ilagay...doon po ba sa drive shaft nakalagay ito png switch na ito ay parang clutch type...regards.
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insomartin
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« Reply #15 on: May 15, 2009, 03:31:05 AM » |
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Base sa experience ko hindi nagtatagal ang ni-rewind na motor o hindi na katulad ng dati ang life nya. Yung 100HP motor ng compressor namin sa planta wala pang isang linggo sunog na agad yung winding nya. Siguro sa quality ng wire na ginamit or baka sa pinag paparewind namin.
74.5 kw. much mura ata kung nagpakabit na lang nang 3phase or change motor. kasi planta naman.
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akosiikem
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« Reply #16 on: May 15, 2009, 07:49:24 AM » |
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@ tyrap -my rewinding shop ka ba?
@insomartin - dati nang 3phase itong motor na to. Sorry OT na pala ko. Pa rewind namin nito umabot ng 100 thou plus. Crisis kasi kaya nagtipid na rin planta namin.
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