apec 2014 session is2-3-4 jim marinos evp payton planar … · 2014. 5. 28. · apec 2014 session...
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APEC 2014 Session IS2-3-4
Jim Marinos EVP Payton Planar Magnetics ltd
Planar Structure Planar Structure
• Better Core Utilization • Lower DCR • Lower Leakage • Less Skin Effect • Less Proximity losses • Less EMI • Reduced Size and Weight
224 Watt Planar Transformer
224 Watt Toroid Transformer
• Does size matters?
• Does repeatability matters?
Designs for Conduction Cooling
Design Objectives
Size
Power Density
Efficiency – Highly Constant Parasitics
Value for Cost
There are two main elements in the design of a Planar Magnetic Structure
1) Control of Parasitics:
2) Optimum size and Frequency depends on the maximum environmental temperature
Conduction Cooling Methods
Thermal Management of Planar Magnetics for Automotive Applications
• Core Temperature Reduction
• Surface Interface Improvement
• 4 Sides Cooling
• Winding Cooling
Conclusions
• Economic Benefits
• Core Size Reduction
• High-tech Insulation Material Reduction
• Thermal Benefits
• High MTBF