ece42506
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« on: October 19, 2009, 09:35:29 AM » |
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balik tayo sa history na may nagaganap na current wars. ano ang mas papaboran ninyo? ang Alternating Current ni George Westinghouse o ang Direct Current ni Thomas Edison?
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The Philippine Electronics and Technology Forum
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« on: October 19, 2009, 09:35:29 AM » |
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insomartin
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« Reply #1 on: October 19, 2009, 09:45:57 AM » |
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akhen
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« Reply #2 on: October 19, 2009, 09:46:54 AM » |
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AC. kc mas masakit makakuryente ang DC... ^_^
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insomartin
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« Reply #3 on: October 19, 2009, 09:49:16 AM » |
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rdpzycho
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« Reply #4 on: October 19, 2009, 11:29:13 AM » |
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"Keep on starting, and finishing will take care of itself."
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Ganda692002
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« Reply #5 on: October 19, 2009, 12:41:10 PM » |
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if kailangan talaga to choose only one.. DC ako.. gamit sa analog at digital circuit.. pede rin sa transmission kahit di mas efficient.. pede rin sa wireless\wired communication.. pag ac lang maraming inposible or mahirap gawin..
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eveready battery
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« Reply #6 on: October 19, 2009, 12:54:13 PM » |
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oo tama ka dyan sis kasi transformer lang ginagamit sa very long line distribution(naka step up muna tapos pupunta sa substation at i step down papunta sa residential line).sa dc hirap i step up(gagamit ka ng boost converter pero di na practical kung masyadong malayo yung distance ng load).kaya AC nanalo sa power transmission.
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rdpzycho
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« Reply #7 on: October 19, 2009, 12:54:52 PM » |
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pagdating sa communications, AC pa rin binabato. kahit sa electronics circuit, DC ang voltage supply pero 'yung actual currents, level shifted AC talaga (dahil sa load).  every motor is AC, ginawan lang ng way 'yung DC motor para ma-convert sa AC para umikot. it's easier to convert AC to DC than vice versa. sa transmission posibleng mas efficient ang DC dahil magagamit niya 'yung buong wire (walang skin effect), pero sa 60Hz baka maliit lang din ang skin effect. ang mahirap sa DC, conversion from one voltage to another. DC to AC to DC (DC to DC) converter muna. may uses silang dalawa, na as efficient ang isa than the other one. pero sa tingin ko mas maraming gumagamit ng DC (circuit level) than AC (mostly industrial, pero may DC counterpart pa rin sa controls, unless purely relay logic and contactors). kailangan nga lang ng AC supply ni DC, unless merong battery. 
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"Keep on starting, and finishing will take care of itself."
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SpongeBob
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« Reply #8 on: October 19, 2009, 12:56:28 PM » |
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Mas economical ang transmission ng AC kasi meron transformer.
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marcelino
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« Reply #9 on: October 19, 2009, 01:01:00 PM » |
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Mas economical ang transmission ng AC kasi meron transformer.
palagi ko tong nakikita sa mga books... it has always been about the money! 
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"Don't take life seriously. After all, no one has ever come out of it alive. -Bugs Bunny"
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Ganda692002
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« Reply #10 on: October 19, 2009, 01:21:47 PM » |
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basta DC parin ako hehehe. kasi AC is based on DC nireverse mulang yung connection/flow eh hehehehe AC cannot exist without DC but DC can exist without AC... hehehe
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ece42506
CR2032 Battery

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« Reply #11 on: October 19, 2009, 06:41:57 PM » |
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sa akin, AC pa rin ako kasi in terms ang I2R losses, malaki ang losses sa DC. isipin ninyo, kung DC ang gamit sa transmission, kailangan natin ng madaming outlets sa bahay na may iba-ibang voltages. isa pang disadvantage ng DC ay kailangan i-match ito ang voltage na kailangan ng load.
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rdpzycho
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« Reply #12 on: October 19, 2009, 06:56:26 PM » |
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nearly lahat naman ng gamit sa bahay DC ang kailangan, even computers can run on DC (300V) supply. may rectifier din naman sila sa input.  merong bansa na DC ang outlet nila ('di ko na maalala), 4 prong outlet, around 150V ata ang voltage, and they live for years with it. ang advantage ng DC sa transmission is reduced skin effect (actually 0 skin effect), inductance due to wires is considered a short, power factor may not be a major concern. ang disadvantage, transformation to other voltage. 'di ganung kadali than AC. one more concern e tulad nung sa telepono, negative voltage dapat ang i-transmit. 
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"Keep on starting, and finishing will take care of itself."
- Neil Fiore
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carlsfootprints
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« Reply #13 on: November 02, 2009, 02:18:48 AM » |
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never saturate..
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The Philippine Electronics and Technology Forum
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