I’m sure you know what an IGBT is, but did you know this small device could already save an equivalent of more than 3 years (sic!) of annual global CO2 emissions?

Today, I had the honor to listen to the lecture of Professor Bantval Jayant Baliga, the inventor of the IGBT. When he built the first type, there was doubt whether it would work and make any impact. But this device has been proven very reliable and can switch kilovolts and kiloamperes.

This unassuming device has revolutionized the efficiency of motor controllers, boosting it from a meager 50% to an impressive 90%. Its affordability has led to its widespread adoption across various industries, and you might be surprised to learn that it’s likely present in your home, quietly powering your washing machine, refrigerator, heat pump, and inductive oven.

IGBTs are not just about efficiency, they are also about the future. They are the backbone of electrification and renewable energy. These unassuming devices power the AC inverters in solar farms, wind turbines, and electric trains and cars, playing a crucial role in our transition to sustainable energy sources.

For that contribution, Professor Baliga received the MILLENNIUM TECHNOLOGY PRIZE 2024. It is awarded with 1 Mio. Euro – comparable to the Nobel Prize.

When the lecture started, I was surprised at how few people attended. The lecture was advertised throughout the university and even the city of Helsinki, but still half of the large hall was empty.

Sometimes, the small and unseen create the most significant impacts. Next time you open your fridge, remember Professor Baliga’s and all the IGBT’s contributions to energy efficiency.

You can rewatch the lecture 🌐https://youtu.be/lnLZfUJrG58?t=219.