Lecture 2: Analysis Methods and Rectifiers

MIT 6.622 Power Electronics, Spring 2023
Instructor: David Perreault

In this lecture, we first review linear vs. switching regulators. We then introduce definitions and methods for analyzing switching circuits, including the Method of Assumed States and Periodic Steady State.

License: Creative Commons BY-NC-SA

[ervivekchoubey]

Being an electrical engineer, it is refreshing to watch these lectures and an absolute gem helping me to fill the knowledge gaps that remain due to time constraints while taking the classes and exams. ❤

[lumpyfishgravy]

I trained in the late 1980s and we didn't get this level of *applied* engineering - mostly endless screeds of theory. What I use day to day is what I picked up and taught myself. And understand: I started work before The Internet. If there wasn't a book in the library, you didn't know it.

I am loving this Playlist.

[alfonsocastellanosbalderas]

Thank you so much for sharing. Being an communications and electronics engineer, I am loving this video series.

[glenmerwyn]

Thank you for these lectures. I can't travel to a university (I'm geographically isolated) and need to study; I'm already a Mech eng, trying to study Electrical eng.
Thanks (I live in NZ)

[cowwcmk]

Loving the ghost of a previous lecture on state machines in the chalkboard! It takes me right back to class!

[Ben_Dover]

Much gratitude for this lecture playlist.

[suleyman]

i am so happy to be able to watch these informative lectures, thx for sharing us.

[kikifaqih_]

thanks so much mit, thanks too for the subtiltle❤

[SeniorScriptKitty]

i really appreciate the fact that this guy is using child style chalk

[mboykin]

Wake up camera person. Show the projected illustration at the end.

[byronwatkins]

At 21:00, you drew the load voltage rather than the diode voltage. When Vin>0 the diode is shorted and Vd=I(0)=0. When Vin<0 the diode is open and Vd=Vin<0. Since all currents are equal, this part is correct but might not be what you intended.

[egertondidikallay]

Wonderful lecture ! Sadly we didn't get to see the simulations at the end. The Camera was too focused on the instructor.

[Treepox]

In my mind... 21:40. If Id is positive, the Vd is zero. That been said with an ideal diode. I think Vd is mixed up with Vo (Voltage over the resistor. Pleased to see reactions on my vision on this.

[raisingjakestudios]

Your pointing out of the inductance in the wall power source raises a question: What is the impedance of the Power Grid given there can be hundreds of miles of wire from generating station to home electrical outlet? More specifically, how many "grid tied" solar power converters can be attached to this grid before it becomes unstable?

[rafalklepinski]

Good, but feels like we missed something prof. Perreault was showing on the projector near the end..

[RobertKennedyPersonal]

At 41:43 it's not completely clear what needs fixing. Vx has a discontinuity but it isn't clear why that's a problem because Vx isn't the voltage seen by the load. It seems like the inductor still protects the load from the ugly source-side voltage behavior. It would seem clearer to me if the problem statement here were accompanied by a plot of the load voltage and a clear statement of what problem needs to be addressed from that perspective. Or more broadly, a clearer statement of what the problem is, whether it has to do with the voltage seen at the load or not.

[randydiffenderfer]

loving the availablility of these courses, as a retired quantum chemist, can see how the people who get their hands dirty do their stuff!

also loving the "carbon copy" -- wonder how many students know where *that* came from? :D :D :D

[alimovahedi]

In the first lecture you mention the reason for a linear regulator is due to Po/Pin but you did not use the same technique to describe the efficiency of the second technic, please.

[amarissimus]

I always forget about vD. And it always gets me. Pay attention kids, it's no fun.

[ruellerz]

Is it worth having a switch that can make multiple pulses to reduce the severity or is the inductor and capacitor flawless and doesn't need this assistance?