"Switching Power Magnetics - Transformers" was presented at APEC 2011. This four hour seminar that covers basic principles, energy storage and flybacks (CCM, DCM, QR) and transformers (forward, half bridge, push-pull) with step-by-step design examples.
This introductory course is for those who want to better understand what goes into switching power transformer design beyond calculating turns and inductance. Power supply and component engineers will better understand some of the nuances involved to get the best performance.
The first portion reviews basic magnetic concepts and principles, followed by a thorough review of core properties and winding characteristics.
The second portion covers energy storage magnetics such as the flyback transformer used in several circuit variants (continuous, discontinuous, quasi-resonant) with a complete step by step design example.
The third portion covers both unipolar and bipolar transformer design – forward, half bridge and push pull, again with a full step-by-step forward design example. Common selection methods core size, gaps and conductor size are presented. A complete discussion and application of Dowell’s curves addresses proximity losses in high frequency applications.
"Building Switching Power Transformers" was presented at APEC 2013. The four hour course picks up where design courses leave off. Three topics are covered. Safety standards including IEC 60950, IEC 61558, and IEC 60664 and their application to transformers. What is creepage and clearance? How do you use the tables? How to do you implement them in the transformer. The second part reviews transformer materials and what you need to know about them including UL insulation systems. And lastly how do you translate the design into a part that can be manufactured reliably, repeatedly and economically.
"Magnetics Design" is a two day magnetics design seminar covering eleven major topics which include:
- Basic magnetics concepts and equivalent circuits
- Core types and characteristics
- Wire, windings and characteristics
- Magnetic design fundamentals
- Inductors and flybacks
- Real power transformers
- Other transformer types
- Design for manufacturing
- International saftey standards
- Spice modeling
- Testing and troubleshooting