×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Are you an
Engineering professional?
Join Eng-Tips Forums!
• Talk With Other Members
• Be Notified Of Responses
• Keyword Search
Favorite Forums
• Automated Signatures
• Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

#### Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

# Calculating Flyback Transformer Core Air Gap

 Forum Search FAQs Links MVPs

## Calculating Flyback Transformer Core Air Gap

(OP)
Hello,

I'm working on designing a very custom flyback transformer and I'm needing to have the two EE core halves machined and ground to size from solid ferrite. The last step I need is to calculate the air gap between the central core leg but I haven't found a good reference in text or online. The few equations that I've found seem to be contradictory and I haven't found a good reliable source for calculating air gap of a flyback core. Any help or references would be greatly appreciated!

Thanks,
Ken

### RE: Calculating Flyback Transformer Core Air Gap

Googling "flyback transformer gap calculation" turned up quite a few useful papers with the calcs involved, even coming at it from different directions.

Dan - Owner
http://www.Hi-TecDesigns.com

### RE: Calculating Flyback Transformer Core Air Gap

The textbook 'Soft ferrites' by Edgar Snelling is well worth acquiring. It's long out of print and used copies aren't exactly cheap but it's an excellent reference which explains the principles of design with clarity and precision.

#### Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

#### Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

#### Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login

#### Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a partâ€™s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

# Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

• Talk To Other Members
• Notification Of Responses To Questions
• Favorite Forums One Click Access
• Keyword Search Of All Posts, And More...

Register now while it's still free!