Hello, I have a Power supply without label. Anybody can help me to estimate the regulated output power? No-load power is about 6W. Thanks!
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Last edited by Gale William; 11-25-2016, 08:24 PM. -
Re: How to estimate the output power
So it is 220VAC to 13VAC step-down transformer. What is the wire gauge being used in the secondary side? That will give you a clue as to how much current you can draw from the secondary winding. It is not easy or possible to get the exact VA rating of the unknown transformer (you need to know the core material, core loss, core cross section, etc.). may be some one that design transformer for living can explain.Last edited by budm; 11-25-2016, 08:48 PM.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809 -
Re: How to estimate the output power
That's not a power supply, it's just a toroidal transformer.
It's probably 12v AC, but your multimeter shows 13v AC because it's unloaded. As you connect devices to the output of the transformer, the output voltage will probably go down closer to 12v AC.
It looks capable enough to do 500VA but i can't be sure.. how heavy is it?Comment
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Re: How to estimate the output power
Based on your dimensions, 400~500VA is the estimated value.
I.E.
http://www.antekinc.com/as-4212-400va-12v-transformer/Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: How to estimate the output power
Most cheap Chinese gadgets use such Toroidal Trans to cut expenses . Cheap designs and not reliable .Comment
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