University of Moratuwa Electrical Engineering Technology 3rd yers help

[WwW.lk]

Machan mokakda ban uba karanna hadanne? Kelani Tissa balagareth wahanna weyida manda?? Anyway Machan, Ubata oka theoritically nativa practically witarak karaganan oni nam Pettah wala 2nd Cross Street eke tiyena Circuit wikunana PCB House, NEC Electronics wage Shop ekakin Parts tikayi PCB ekayi araganna puluwan. Mage yaluwek oya wage ekak haduwa Current eka Cut karapu kaledi. (2005 witara man hithanne.)

but machan mata meke teary eka danaganna one kohomada kerenne kiyala mokada ethakota wenas karala wadi watt ganak ganna puluwan wenawane neda? ekay thread eka damme thawama enna one mata one mattamata awe na machan

 

[WwW.lk]

bumpyo........

 

[WwW.lk]

bump

 

[WwW.lk]

 

[wdsmedia]

tranformer ekaka principle eka ...AC to DC dena eka nemai... X kiyanne AC voltage ekak nam ..and F kiyanne eke frequency eka nam......transformer eke function eka thamai....X ta wada adu or wadi voltage ekak F constant thiyagena hadana eka,.....X ta wada wadi voltage ekak hadana ewata "step up " kiyala kiyanawa. ..aduwen hadana eka "step down " kiyala kiyanawa...

ooketh thawa hugak thiyanawa...transformer types....eewa net eken hoya ganne...

AC to DC normaly karanee rectifier ekak therough thamai...DC to AC karanne converter ekak through.

coil gana..special kiyanne deyak naha...ithn...coil coil ma thamai....habai..AC frequency eka adu wenne wenne.....coil eke pota gana aduwenawa..ee kiyanne , for instance 110 v 50 Hz tranformer eke coil eka bara A Kg nam ......110 v 400Hz transformer eka A/4 Kg wage wenwa...ekai aircraft poer system eka 110V 400Hz use karnne .

 

[WwW.lk]

tranformer ekaka principle eka ...AC to DC dena eka nemai... X kiyanne AC voltage ekak nam ..and F kiyanne eke frequency eka nam......transformer eke function eka thamai....X ta wada adu or wadi voltage ekak F constant thiyagena hadana eka,.....X ta wada wadi voltage ekak hadana ewata "step up " kiyala kiyanawa. ..aduwen hadana eka "step down " kiyala kiyanawa...

ooketh thawa hugak thiyanawa...transformer types....eewa net eken hoya ganne...

AC to DC normaly karanee rectifier ekak therough thamai...DC to AC karanne converter ekak through.

coil gana..special kiyanne deyak naha...ithn...coil coil ma thamai....habai..AC frequency eka adu wenne wenne.....coil eke pota gana aduwenawa..ee kiyanne , for instance 110 v 50 Hz tranformer eke coil eka bara A Kg nam ......110 v 400Hz transformer eka A/4 Kg wage wenwa...ekai aircraft poer system eka 110V 400Hz use karnne .

oya thery ekama neda thiyenne dayna mo eketh eke wageema genarator head walath magnetic thiyanawada? thanx

 

[WwW.lk]

 

[Anteros]

බම්ප්

 

[WwW.lk]

bump again

 

[WwW.lk]

 

[dragonlord]

machan y circut ekak ganne normal widihata ganna bari y? 240v to 12v karana ekatama anik patthata dhunnoth wenne nadda?ehema nowenne y?oya karunu danaganna one machan ,anikacoil walin kohomada theeranaya karanne amper gana kohomada potawal gana dana ganne 12v ganna potawal meccharak othanna one kiyala transfomer ekata kiyana ewwa

1) machn transformar 1ta 12 AC dunnoth 230AC ganna puluwan eth uba 12 DC dunnoth kisima deyak wenne ne . mokada dc kiyanne daarawa yanne ekama peththata eka transformer 1ta dunnama eke core eke flux 1 constant. voltage 1k induce wenna nam flux 1 change wenna one ekata ubata ac signal ekak denna oni.ethakota flux 1 chage wenawa then primary eke AC voltage 1k induce wenawa.anna e 230 AC voltage 1 use karanna puluwan.

2)primary 1i secondary 1i ekama core eke tiyena nisa ekama flux 1 use karanne e nisa apita ara sameekarana yen potawal gaana hoya ganna puluwan.

3)anika machan ampire gaana nemei volt gaanai balanna oni mokada uba set karana load eke resistance 1ta anuwa amper gaana wenas wenawa.

hope u got d answer

 

[WwW.lk]

1) machn transformar 1ta 12 AC dunnoth 230AC ganna puluwan eth uba 12 DC dunnoth kisima deyak wenne ne . mokada dc kiyanne daarawa yanne ekama peththata eka transformer 1ta dunnama eke core eke flux 1 constant. voltage 1k induce wenna nam flux 1 change wenna one ekata ubata ac signal ekak denna oni.ethakota flux 1 chage wenawa then primary eke AC voltage 1k induce wenawa.anna e 230 AC voltage 1 use karanna puluwan.

2)primary 1i secondary 1i ekama core eke tiyena nisa ekama flux 1 use karanne e nisa apita ara sameekarana yen potawal gaana hoya ganna puluwan.

3)anika machan ampire gaana nemei volt gaanai balanna oni mokada uba set karana load eke resistance 1ta anuwa amper gaana wenas wenawa.

hope u got d answer

oh thanx machan .240v 10kw wagee ganna kohomada karanna one machan transfomer eka othanna oneda naththam wena seen ekakda?

 

[kasuncs]

Moratuwa University mokatada ban AC To DC circuit hadanna.
eka A/L karana ekek unath dannavane.
port programming ,assembly ,network programming ,AI , vage thami University standard.

Uba dannawada ube PC eke 12V out put ekak denne transfomer use karanne natiwa kiyala?
40A 12V DC supply ekak denne. Ewata kiyanne conveters kiyala. (Buck, Boost).

http://en.wikipedia.org/wiki/Buck_converter

Machan power supply units ubala hitana tarama simple na. Transformer ekak dala diaode 4k dammata hari yanne na.

 

[dragonlord]

oh thanx machan .240v 10kw wagee ganna kohomada karanna one machan transfomer eka othanna oneda naththam wena seen ekakda?

mama electrical neme e nisa inverter nam hadala ne ban
hebei mata hithena widiya kiyannam

10KW ganna 12V ac side eke loku amper gaanak oni enisa coil pichchila yai
transformer eke heat 1ka godak wedi nisa
12 side eke ena amper ganna transformer eke coils walata oroththu denawada kiyala balapan mokada nethnam coils rathwela 12 side 1 pichchila yayi

mage nam adahasa aluth 1k othanna wei normal trnnsformer wala secondary eke coil thuni mama danna widiyata

oka thama mata hithena widiya wedi wisthara transformers othana ekkenek gen ahapan

 

[WwW.lk]

Moratuwa University mokatada ban AC To DC circuit hadanna.
eka A/L karana ekek unath dannavane.
port programming ,assembly ,network programming ,AI , vage thami University standard.

methana case eka ac to dc neme machan dc to ac mata ona ewwa daala thiyenne a/l karapu kenek gen ahuwa un thama kiwwe mee wagee kenekgen onawatath wada ubata danuma deyi kiyala ekay damme

 

[WwW.lk]

mama electrical neme e nisa inverter nam hadala ne ban
hebei mata hithena widiya kiyannam

10KW ganna 12V ac side eke loku amper gaanak oni enisa coil pichchila yai
transformer eke heat 1ka godak wedi nisa
12 side eke ena amper ganna transformer eke coils walata oroththu denawada kiyala balapan mokada nethnam coils rathwela 12 side 1 pichchila yayi

mage nam adahasa aluth 1k othanna wei normal trnnsformer wala secondary eke coil thuni mama danna widiyata

oka thama mata hithena widiya wedi wisthara transformers othana ekkenek gen ahapan

ekama thamay machan ona point eka mata one transfomer ekak othana ekata wada dayinamoo ekak othanna(hadannahinawenna epa)mokada transfomer ekatath carrent ekak denna wenawane ethakota mee wadee saarthaka nane,puluwannam mata e wagee side ekaka inna kenek sambanda karala denna,moratuwe ayya kenek hambuna ,eya dannawa athi,dayina moo hadana,othana kenek sambanda karaganna hari thanak hari kiyanna,

 

[djHiran]

මචං transformer එකක theory එක තමයි 'mutual inductance' (electrodynamics). උඹට transformer එකකින් වැඩක් ගන්න නම් time-varying current එකක් ඕනෙ. input එකේ I කොච්චරක් වුණත් dI/dt=0 නම් output voltage එක theoretically zero. EMF2= -M(dI1/dt) තමයි mathematical formulation එක. ඔතන M කියන්නෙ නියතයක්. පොඩි input voltage එකක වුණත් alternating current එකක් දෙන්න පුළුවන් නම් ලොකු output voltage එකක alternating current එකක් (same frequency) ගන්න පුළුවන්. හැබැයි ශක්තිය සංස්ථිතික (conservation of energy) වෙන්න ඕනෙ නිසා rms current එක අඩුයි output එකේ (dissipation එකකුත් වෙනව). Theoretical සයිඩ් එක ගැන අවශ්‍ය නම් මට තව තොරතුරු කියා දෙන්න පුළුවන් (phys sp, uoc)

 

[djHiran]

Uba dannawada ube PC eke 12V out put ekak denne transfomer use karanne natiwa kiyala?
40A 12V DC supply ekak denne. Ewata kiyanne conveters kiyala. (Buck, Boost).

http://en.wikipedia.org/wiki/Buck_converter

Machan power supply units ubala hitana tarama simple na. Transformer ekak dala diaode 4k dammata hari yanne na.

 

[djHiran]

Moratuwa University mokatada ban AC To DC circuit hadanna.
eka A/L karana ekek unath dannavane.
port programming ,assembly ,network programming ,AI , vage thami University standard.

thawama A/L karana kenekgen ahanawata wada A/L hondatama karapu kenekgen ahuwoth hondai kiyala hithala ahanna atte machan

 

[Pit bull]

1) machn transformar 1ta 12 AC dunnoth 230AC ganna puluwan eth uba 12 DC dunnoth kisima deyak wenne ne . mokada dc kiyanne daarawa yanne ekama peththata eka transformer 1ta dunnama eke core eke flux 1 constant. voltage 1k induce wenna nam flux 1 change wenna one ekata ubata ac signal ekak denna oni.ethakota flux 1 chage wenawa then primary eke AC voltage 1k induce wenawa.anna e 230 AC voltage 1 use karanna puluwan.

2)primary 1i secondary 1i ekama core eke tiyena nisa ekama flux 1 use karanne e nisa apita ara sameekarana yen potawal gaana hoya ganna puluwan.

3)anika machan ampire gaana nemei volt gaanai balanna oni mokada uba set karana load eke resistance 1ta anuwa amper gaana wenas wenawa.

hope u got d answer

good post !!!
good for everyone...