How Transistor Switching Loss is Measured

Video Description

As the renewable revolution pushes us towards ever higher power densities and efficiencies, optimising switching speeds in MOSFETs, IGBTs and HEMTs is becoming an increasingly critical part of power electronics design. We can use double pulse testing to characterise switching performance of power converters, and it's surprisingly easy! Discover Easy, Affordable, and Reliable PCB manufacturing with JLCPCB! Register to get $60 New customer coupons: https://jlcpcb.com/?from=electrarc240 What happens when: 0:00 Introduction 0:50 JLCPCB 1:44 The circuit and its operation 3:35 What is switching energy? 4:17 Turn-on energy curves 5:01 Turn-off energy curves 5:34 Overshoot (turn-off) 6:17 Optimising switching speed 6:57 The other overshoot (turn-on) 7:20 Speeding up one switching edge 7:47 Switching energy reduction with lower gate resistance 8:11 Voltage acceleration - dV/dt 9:32 Current acceleration - dI/dt 9:55 Approximating loop inductance 10:36 Wolfspeed definitions and how to calculate each value 12:39 Processing waveforms - MATLAB/Python/whatever you like! 12:55 Physical setup - My boards 14:15 Physical setup - Inductor 14:38 Physical setup - Measuring voltage (isolated probe) 15:09 Physical setup - Measuring current (Rogowski coil) 15:53 Physical setup - HV power supply 16:10 Physical setup - Generating the double pulse waveform 16:30 Conclusion 16:49 Outro Looking to buy or loan lab equipment in the UK? Check out https://telonic.co.uk/ Follow me on Instagram to stay up to date on all the latest stuff: https://www.instagram.com/electrarc240/ Join the ElectrArc240+ discord server to hang out with likeminded folk: https://discord.gg/un9c5VHX7N Donate through PayPal to support more cool projects: https://www.paypal.com/paypalme/electrarc240