1 / 15

Mastering Thermal Management: Essential Insights for LED Luminaire Design

Join Dr. Andy E. Young in this comprehensive masterclass focused on the critical role of thermal design in LED luminaire manufacturing. Discover the challenges and solutions surrounding thermal performance, and learn how electrical current affects both light output and heat generation. We'll explore how good thermal management can transform design, enhancing performance, reliability, and cost-effectiveness. Avoid common pitfalls and identify your 'weakest link' in thermal performance to ensure optimal results in your lighting projects.

michi
Télécharger la présentation

Mastering Thermal Management: Essential Insights for LED Luminaire Design

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Thermal ManagementMaster-class Dr Andy E Young andrew.young@litecool.co.uk

  2. Overview • Why is thermal design so important? • What are the challenges and solutions? • What factors effect.. • Performance? • Reliability? • Cost? • Where are the common mistakes made? Let’s start with some questions for you..

  3. Question to the audience When you design a luminaire do you.. • Set the current and live with the lumens? • Drive the LED harder and live with consequences? Where is your ‘weakest link’ in thermal performance? • Package • Module • Luminaire body Are you confident your thermal performanceis as good as it could be? Why is thermal performance so important?..

  4. Why is thermal design so important? • Electrical current generateslightand heat • Cooler means morelightis generated • Maximum light needs both • High current • Low • This is a vicious-circle! Future Light Solutions, ULT2.0 tutorial  What are the challenges?..

  5. What are the challenges? • High current and low appear to be mutually exclusive • Complicatedinteractions • The data provided is incomplete, and • Where available it isoften for lab conditionseg.  What are the solutions?..

  6. What are the solutions? • Brute force • Over-engineered heat-sinks, etc. • Build-in active technology eg. fans • Apply thermal management technology • Close the loop in performance evaluation • Address root causes • For real-world conditions • Good thermal design can.. Build in the right technology, in the right place convert a vicious-circle into a virtuous-circle!  What factors affect performance?..

  7. What factors affect performance? • Goal: find design for and • is dependent on and • Denotes from LED package datasheet • Denotes from luminaire type • Denotes from thermal design Missing value! How to determine these values?

  8. What factors affect performance?Missing data • Related to the thermodynamic efficiency of the LED, referred to as the wall-plug efficiency • Hard to find, Often guessed at eg. 80% • Can be.. Measured, or Calculated Photopicsensitivity Normalised Plank function

  9. What factors affect performance?Luminaire type • The numbersscale thesignificanceof the variousthermal resistances Digital Lumens

  10. What factors affect performance?From thermal design • Conventional wisdom tells us thin layers are less resistive • All thermal resistances are composed of two effects..

  11. Exploiting the virtuous circle • Same .. • Lower and • Achieved by thermal design of package and module 

  12. What factors affect reliability? • Indicated by • Strongly dependent on and

  13. What factors effect.. Cost • Luminaire cost • Good thermal design can reduce cost if done well • $8 on down-light • $30 on a high-bay • Life cost • Indicated by E and L70 • Strongly dependent on Tj

  14. Common errors • Taking data on face value • Thinking in 1D • Component-by-component design • Neglecting interfaces • Not using TIMwell • Thermal tolerance stack-up • Assuming it is all about the heat-sink • Treating a luminaire body as a heat capacitor • And then adding long fins • Giving me less than a 5 on the feedback 

  15. Thank you fromThermally efficientLED Modulesandrew.young@litecool.co.uk

More Related