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AC Voltage Stabilizer
AC Voltage Stabilizer
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Old 13th September 2017, 03:35 AM   #31
Wavebourn is offline Wavebourn  United States
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Location: Pleasant Hill, CA
AC Voltage Stabilizer
DIY option:

1. Generate 50 Hz signal
DDS Signal Generator AD9833 Module Programmable Microprocessors Sine Square Wave | eBay

2. Amplify it
WONDOM 1X 400W Class D Audio Amplifier Board Compact T-AMP Module Subwoofer | eBay

3. Power this things from SMPS
High quality HIFI 800W SMPS +/-60V LLC Soft switching power supply board AMP PSU | eBay

4. Use some toroid power transformer, backwards. Set 240V by a volume control pot.

Edit: what I found on ePay, just examples. You need an amp and PS that match each other.
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Old 13th September 2017, 03:45 AM   #32
mchambin is offline mchambin  France
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Another option: Couple an electric motor to run a generator.
This is how we made 400 Hz AC to test stuff used onboard navy ships in the 60's.
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Transistor junction temperature is not transistor case temperature.
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Old 13th September 2017, 03:56 AM   #33
sumotan is offline sumotan  Indonesia
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Wazzzzz getting to sound complicated. Lol
Btw my brother has a variac laying around,
can that be used ?

Thanks guys
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Old 13th September 2017, 03:58 AM   #34
mchambin is offline mchambin  France
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Quote:
Btw my brother has a variac laying around,
can that be used ?

Thanks guys
Yes.
Of course, it will not stabilize, but perfect to compensate for the average line undervoltage.
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Transistor junction temperature is not transistor case temperature.

Last edited by mchambin; 13th September 2017 at 04:02 AM.
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Old 13th September 2017, 12:34 PM   #35
DF96 is offline DF96  England
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I cannot understand why the OP and the PSU maker both seem to think that this SMPS behaviour is acceptable.
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