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July 15, 2024, 05:55:12 05:55


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Author Topic: Power Transformer?  (Read 746 times)
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max
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« on: June 12, 2024, 06:49:25 06:49 »

Hi,

I need to design an Isolation power transformer with following specs

input      300v 400Hz
output    100v
power     500va

what is the core size (iron & silicon)
primary n secondary windings details

Regards
« Last Edit: June 15, 2024, 04:23:18 04:23 by max » Logged

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Checksum8
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« Reply #1 on: June 12, 2024, 04:34:59 16:34 »

Maybe this calculator will help?

https://goodcalculators.com/transformer-calculator/
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PM3295
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« Reply #2 on: June 12, 2024, 06:49:14 18:49 »

Assuming you will be using silicon-steel laminates for your transformer design, below is a link dealing with this material.

"Among all the soft magnetic materials, silicon steel is still by far the most commonly used material with an annual worldwide production of ten million tons and a market share of 80% [30]. Silicon steel (3.2 wt% Si) is currently the most popular choice for motors and transformers because it offers balanced electrical and magnetic properties"

https://www.sciencedirect.com/science/article/pii/S0304885318331330

Some other things that you will need to consider in your design are:

1/ Allowable flux density (Tesla) in the core against core losses.
2/ Core volume needed for specified output power.
3/ Winding volume needed on the bobbin. (fill factor)
4/ Allowable temperature rise against maximum ambient operating temperature.
5/ Balance of core and copper losses.
6/ Current density allowed in winding wires. (will affect losses and temperature rise)

https://eepower.com/technical-articles/how-to-design-a-transformer-size-and-selection/#


  
« Last Edit: June 12, 2024, 07:03:30 19:03 by PM3295 » Logged
Sideshow Bob
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« Reply #3 on: June 13, 2024, 07:55:45 07:55 »

Hi,

I need to design a power transformer with following specs

input      300v 400Hz
output    100v
power     500va

Regards
The devil is in the detail. Like what is your application. And to what level do you need to comply with regulations. Do you need galvanic isolation. And what is your budget. 
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wellnerson1
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« Reply #4 on: June 13, 2024, 02:30:43 14:30 »

Dear MAX,
Please see the Chapter 7 - Power Transformer Design of the following Book.
Transformer and Inductor Design Handbook - 4th Edition - Colonel Wm. T. McLyman
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dR-mR
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« Reply #5 on: June 15, 2024, 01:11:16 01:11 »

The book the member wellnerson1 recommended is worth reading if you are interested in transformer design.

Link for the book,
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PM3295
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« Reply #6 on: June 15, 2024, 07:13:33 07:13 »

Here is a design that could meet your requirements.

Included is a simulation of the design using the extracted spice model of the transformer.

https://www.brown.edu/Departments/Engineering/Courses/ENGN1931F/mag_cores_dataAKSteel-very%20good.pdf
« Last Edit: June 17, 2024, 08:01:39 20:01 by PM3295 » Logged
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