Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Trabsformer experiment results

Status
Not open for further replies.
M

martin draper

Newbie level 3
Newbie level 3
Joined
Apr 14, 2007
Messages
4
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,301
hi people, i am new to this site so be gentle.
I did a experiment using a 12A resistive load at college with a 5kva 230/110 step down transformer the results i got are: 238v Up, 115v Us, 11.47A Is, 6.07A Ip.
What could i learn from this about efficiency and losses and hysterisis.
all help appreciated.
 

η = V * A secondary / V * A primary [in %]

In your case:
Primary - 230V*6.07A=>1445VA
Secondary - 115V*11.47A=>1319VA

Efficiency:
η ≈ 91%

Regards,
IanP
 
thank you for replying to my question,but could you tell me more about how you got to 91% efficiency.Do you know anything about iron losses?
regards martin.
 

All formulas are here:
http://tpub.com/content/doe/h1011v4/css/h1011v4_56.htm
Keep in mind that PF(power factor) for resistive loads = 1 ..

Results that you already have allow you to calculate only total efficiency, without being able to distinguish which part of losses is caused by copper winding and which is due to core hysteresis + eddie currents ..
Goto:
**broken link removed**
to learn about simple methods of measuring separately copper and core losses ..
Regards,
IanP
 
Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top