Lecture 9.0: Resonant Converter Fundamentals

This video is our first look at resonant converters. The first step is to understand how they work and to do that we take some time to develop the models for the inverter and rectifier. Next we'll look at how to model the resonant network.
0:00 - Introduction
3:00 - Block Diagram and FHA
6:40 - Inverter Modeling
18:10 - Rectifiers
22:10 - Current Driven Rectifier
34:24 - Voltage Driven Rectifier
44:45 - Back to Block Diagram
46:00 - Outro
Reference Textbook:
Fundamentals of Power Electronics - Erickson and Maksimovic

[@madhavrabinbipin2116]

professor your lectures are very descriptive and elaborate , which is the kind I need.Thanks a ton professor

[@shivshambhuchoudhary1204]

Very thankful

[@Tramorn]

Thanks for the video

[@pravatbiswal7081]

very informative lecturer, plz upload more video

[@awoniyiadekunle6321]

Hi Tim,
Thanks for these amazing video series, can you make a video on LCC resonant converters as well.

[@PrakobChannel_01]

I love your clip

[@assoumouhorland9439]

Thank you professor for theses amazing video. I noticed something at 27:16. I think you forgot to divide the amplitude of the first harmonic by the turn ratio.

[@dipakpatel9329]

Hi, You stated that when looking into the primary side, it looks like a resistor. Q: Should diode capacitance (not negligible and highly frequency sensative) be ignored?

[@mohamedmagdy-ku3pl]

I 'm very grateful to you
can you upload this sketchpad as a pdf🙌

[@rohanrao8370]

What do u mean by current driven or voltage driven? How can we recognise such circuits based on the topology?

[@MrBubblegumx]

Is there a way to make a model that you can put into the ac simulation to simulate loop gain? Like the ac model for the buck?

[@jaypandya19]

Hi Tim, thanks for this informative video.
If we are using this topology for Battery charging, then under CC mode it works as voltage driven and under CV mode it works as current driven.
Is this assumption correct?

[@timmcrae3831]

I don't think I understand exactly what you're asking.
I am not an industry expert, but I can give you my understanding. When charging a battery, the CC/CV regimes aren't related to what the battery is doing, but what the converter must do to ensure the battery is charged correctly/without damage.
During the CC mode, the battery is far from full charge and the converter is intended to provide a constant current to inject charge into the battery as fast as possible. When the battery approaches full charge, the battery approaches the maximum allowable voltage of the cell and the charging regime (provided by the converter) changes to CV. The current injected into the battery is determined by the difference between the voltage provided by the converter and the battery, the internal battery resistance and the resistances between the output voltage and the battery. I believe this region is also referred to as trickle charge and ensures that the battery is not over charged.
This change between CC and CV is typically determined by the controller and not necessarily a change in the circuit (although that could be done).

[@jaypandya19]

@@timmcrae3831 Thank you so much for providing this explanation.
😄

[@jimlahey5354]

Of this 46 minutes there's probably about 10 minutes total of drawing out text when you could simply type it with a keyboard.

[@johnkaplun9619]

At 38:54 is that Io/n?

[@timmcrae3831]

As far as I can see, no. The ampere-turns should be equal across a transformer.

[@Googlename699]

I loved your video. I am from the occupied Palestine