Lecture 15 Switching Losses and Snubbers
[SQUEAKING] [RUSTLING] [CLICKING] XIN ZAN: So I think we can start. So welcome to my lecture. Today, we are going to learn about the switching loss and snubbers. So before that, I would like to have a quick review about our devices. So one of the thing power electronics deal with is about the circuits. And nowadays, these circuits play with the transistors. And the transistors can be a bipolar transistor or the field effect transistors. So we use transistors as switches, which is on and off. And other analog circuits, or advanced analog circuits, they use transistors as a current source. And for the switches, we are focusing on there could be ideal switches or practical switches. For ideal switches, we assume the switches will instantaneously turn on and turn off. And also, during the switch-on state, there is no voltage drop, or the resistor is 0. And it can carry both positive and negative current. And when the switch is off, we said there will be an infinite resistor, ...