What role does IGBT play in Transformers?

IGBT is a giant transistor, which has nothing to do with transformer. But this device is the core component of high-tech industries such as power electronics, power transmission and new energy in the future. Nowadays, there is a tendency to partially replace copper-iron (traditional transformer) and aluminum (capacitor) industries. Let me give you two examples: About six years ago, the weight of mobile phone charger was still very heavy, because there was a 5W transformer in it. At present, only mung bean-sized transistors can drive peanut-sized high-frequency transformers to achieve isolation and conversion, and so can fluorescent lamp ballasts. These are just a microcosm, a harbinger. It is very important to introduce IGBT talents. IGBT is only the representative of power transistor (power semiconductor), and there are MOSFET, GTO and IGCT. In the future, DC power transmission and transformation, AC power transmission and transformation, electrolytic aluminum and other facilities may no longer need transformers.