220v AC regulator

[arahman]

can you help me how can i build 220v 50hz voltage regulator
i want the voltage stay stable at 220v

 

[blueroomelectronics]

What do you have that needs 220V regulated mains current? And at how much current?

 

[arahman]

i want to build transformer(Power regulator) can control the voltage and make it stable at 220 v AC with Power 10000 Kw

 

[blueroomelectronics]

Nope, at 10,000 KW if you have to ask you probably don't have the skills to build it, it would also be very expensive. Look up Autotransformers for starters. Why would you need such a thing?

 

[arahman]

i am sory !!!
i meant 10 KW

 

[blueroomelectronics]

And what's your budget, and what's it for?

 

[Ubergeek63]

i am sory !!!
i meant 10 KW

What Blue said holds for 1KW as well, never mind 10KW. 1.8KW is pretty much the limit of your 220V 10A home circuit. 10-20KW is your whole house service.

Dan

 

[audioguru]

Maybe he lives in a 3rd-world country so the electricity voltage varies all over the place.
He should tell his government to smarten up and make stable electricity like we have in civilized countries.

 

[Hero999]

You can buy AC voltage stabilisers, a ferroresonant transformer springs to mind.

A variac can be used to adjust the voltage, it's not regulated but adding a servo motor and controller can make it regulated which is your best bet if you want a regulated 0 to 220VAC power supply.

1.8KW is pretty much the limit of your 220V 10A home circuit.

Don't you mean 2.2kW?

 

[crutschow]

You can buy AC voltage stabilisers, a ferroresonant transformer springs to mind.

A ferroresonant transformer's output voltage depends upon the frequency. If the frequency varies as well as the input voltage (such as from an small engine driven generator), it's not a good solution.

 

[Ubergeek63]

You can buy AC voltage stabilisers, a ferroresonant transformer springs to mind.

A variac can be used to adjust the voltage, it's not regulated but adding a servo motor and controller can make it regulated which is your best bet if you want a regulated 0 to 220VAC power supply.

Don't you mean 2.2kW?

not once you have hung electronics off of it to regulate it. Power lines are rated by RMS current and if you are hanging caps off of rectifier bridges your peak currents cause your available AC to be around 30% down.

Dan

 

[shokjok]

Sounds like this person wants to be assured of clean AC mains. Are the feed lines that noisy that stable regulation and minimum ripple cannot be achieved?

 

[Ubergeek63]

Sounds like this person wants to be assured of clean AC mains. Are the feed lines that noisy that stable regulation and minimum ripple cannot be achieved?

if he actually is third world, he is asking for more than a city block!

 

[Diver300]

It's not actually that hard, if you can accept some steps in the voltage.

Buy a transformer rated at 220V in / 5V out at 50 A, and one at 15V, 50A out.

Their VA ratings are 250 and 750 VA which isn't too bad.

Now connect their outputs in series, and also in series with the load.

Use 5 solid state relays per transformer so that you can connect each primary either way round to the incoming mains, (4 switches) or short it out (5th switch)

You must make sure that the primaries are shorted when not connected to the mains.

Each transformer will then give you plus or minus its voltage, or nothing.

That will give you +20, +15, +10, +5, 0, -5, -10, -15 or -20 V

Your relays only have to handle about 3A, so you would use 600V, 10A ones to be sure, but they are not too expensive. You need a microcontroller to run it all if you want it automatic.

Usual warnings. Although this can work, if you can't see why this could be dangerous, you don't know enough to keep yourself safe.

You can test the scheme with low current transformers, and with low loads on the big transformers.

 

[Hero999]

How are you going to short the primaries of the transformers quickly enough without shorting the mains?

If you don't short the primary you'll get a high voltage on it.

If you make before break then you'll short across the mains.

 

[Ubergeek63]

How are you going to short the primaries of the transformers quickly enough without shorting the mains?

If you don't short the primary you'll get a high voltage on it.

If you make before break then you'll short across the mains.

huh? line transformers often have multiple taps to compensate for low or high line levels. While it would not be regulation, it might be sufficient for his actual needs.

Dan

 

[duffy]

Is it coming off a 10kw engine driven generator, arahman? A big flywheel will compensate for power sags and keep the frequency stable. Makes startup a *****, but it's cheaper, easier and more reliable than an electronic solution.

 

[Hero999]

Add another clutch to disconnect the flywheel during start-up?