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audioguru
Nobel Prize Winner
Canada
4218 Posts |
 Posted - Apr 05 2005 : 10:47:07 AM
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Of course simple multivibrator driven inverters produce a square wave. Incandescent lights and heaters don't care. Motor driven power tools don't care. Some electronic products don't care.
A 220V square wave produces the same power in a resistive load as 220VDC or 220VAC RMS.
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Polo G40
Apprentece
Italy
7 Posts |
Posted - Apr 05 2005 : 10:57:01 AM
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that's all right!!
but i want use an inverter on my car....
and i need synusoid...for tv,playstation
,neon lamps etc..
how i can resolve this problem??
thanks for answer audioguru...
(Edit...Remove email notification due to bad address...)
Edited by - Aaron Cake on Nov 25 2005 09:18:15 AM |
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audioguru
Nobel Prize Winner
Canada
4218 Posts |
Posted - Apr 05 2005 : 11:09:28 AM
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Polo,
Are you going to make a linear power amplifier produce a 220VAC sine wave output? Sure, why not.
It will be about 60% efficient so will produce about 180W of heat if it drives a 300W load.
Its many output transistors will conduct peak currents of about 56A from a 12V battery.
It will need a very large output transformer.
It will be very, very expensive.
You could purchase or build a 300W car amplifier. It would drive a custom-made 36V to 220V step-up transformer.
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Polo G40
Apprentece
Italy
7 Posts |
Posted - Apr 05 2005 : 11:28:11 AM
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ok ...so i can link
this small circuits(image link)
to a car amplifier??
i don't know...the output of first stage is 220v,
the car amplifier can burn...
(Edit...Remove email notification due to bad address...)
Edited by - Aaron Cake on Nov 25 2005 09:18:18 AM |
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Polo G40
Apprentece
Italy
7 Posts |
Posted - Apr 05 2005 : 11:33:53 AM
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sorry for the .gif...
the circuits it's a simple 50hz oscillator,
with 8w transfo....all generate 220vac 5mA curent...
(Edit...Remove email notification due to bad address...)
Edited by - Aaron Cake on Nov 25 2005 09:18:24 AM |
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audioguru
Nobel Prize Winner
Canada
4218 Posts |
Posted - Apr 05 2005 : 12:21:21 PM
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Polo,
Don't be silly. An amplifier needs about a 1V input, not 220V.
If you need a 300W output, make sure the amp is rated for continuous 300 Watts RMS into 4 ohms with low distortion, not the distorted (square waves) "peak" or "maximum" false "Whats" ratings that are used for car amps. Audio amps have an average output about 1/10th their output rating so for continuous full power output will need a big cooling fan. A 300W into 4 ohms amp will have about a 36V output and will need a 300W stepup transformer for 220V output.
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phoenix
Apprentice
Canada
54 Posts |
Posted - Apr 05 2005 : 8:44:41 PM
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quote:
Hi Phoenix,
The wire size is determined by its current which is determined by its power. Do you think that 500W is enough?
Which circuit are you going to use?
Will your TV run on square waves?
I'm still working on this one, http://www.electronics-lab.com/forum/attachments/500Watts_Inverter.gif that's what I'll be using, & I don't really think sqare waves r ok for all TVs...
& an output of 400-500w is good enough...
My Mian prob is getting a suitable transformer...
Cheers... |
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audioguru
Nobel Prize Winner
Canada
4218 Posts |
Posted - Apr 05 2005 : 9:12:12 PM
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Hi Phoenix,
We modified another defective inverter circuit and ended up with that one. Its 500W rating is conservative because we designed it to work well even with weak transistors that are minimum spec. Someone reported that theirs provided 720W continuously.
I guess you'll have to rewind the transformer from a microwave oven.
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Polo G40
Apprentece
Italy
7 Posts |
Posted - Apr 06 2005 : 07:14:56 AM
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hi all..
i know one freiends that say that square wave
can be damage the utilizator...it's true??
(Edit...Remove email notification due to bad address...)
Edited by - Aaron Cake on Nov 25 2005 09:18:37 AM |
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audioguru
Nobel Prize Winner
Canada
4218 Posts |
Posted - Apr 06 2005 : 11:02:02 AM
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Hi Polo,
What's a "utilizator"?
In The Philipines, they use the 500W inverter to power incandescent and flourescent lights and international TV's that operate from a 90VAC to 250VAC supply. They don't have any problem with the inverter's square waves.
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tt1493
Apprentece
Hong Kong
15 Posts |
Posted - Apr 15 2005 : 04:18:13 AM
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quote:
Hi Phoenix,
Refer to the 500W power inverter. Have any other same function and feature for the 2sc1061 power transistor?
Thanks a lot!
TT
I'm still working on this one, http://www.electronics-lab.com/forum/attachments/500Watts_Inverter.gif that's what I'll be using, & I don't really think sqare waves r ok for all TVs...
& an output of 400-500w is good enough...
My Mian prob is getting a suitable transformer...
Cheers...
[/quote]
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audioguru
Nobel Prize Winner
Canada
4218 Posts |
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beiggz
New Member
1 Posts |
Posted - Apr 16 2005 : 6:19:40 PM
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i just say the inveter schematics and i was just wondering if i can use it in my little project.
anyway i ve modify the circuit and now i need it to be tested but i dont have the appreate software and i would like to source the parts and get them shi to jamaica
extract from the
inverter
Have you ever wanted to run a TV, stereo or other appliance while on the road or camping? Well, this inverter should solve that problem. It takes 12 VDC and steps it up to 120 VAC. The wattage depends on which tansistors you use for Q1 and Q2, as well as how "big" a transformer you use for T1. The inverter can be constructed to supply anywhere from 1 to 1000 (1 KW) watts.
ps call me 876-406-3737 or 876-3406673
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tt1493
Apprentece
Hong Kong
15 Posts |
Posted - Apr 19 2005 : 05:30:24 AM
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I have a question. i find that a transformer is 220v input 12v-0-12v output.
Can it use for 12v-0-12v input, 220v output?
The sales told me can't, is he right?
Thanks
TT
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tt1493
Apprentece
Hong Kong
15 Posts |
Posted - Apr 19 2005 : 05:32:10 AM
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I have a question. i find that a transformer is 220v input 12v-0-12v output.
Can it use for 12v-0-12v input, 220v output?
The sales told me can't, is he right?
Thanks
TT
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Topic |
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12/120V inverter again
