IGBT Class D amplifier

[Mimiragon]

Of course!


Pic1 : supply voltage
Pic2 : Sinus rendering
Pic3 : Triangle rendering
Pic4 : Square rendering
Pic5: FFT sinus 5kHz
Pic6: FFT sinus 10kHz
Pic7: Load DC resistance
Pic8; Output voltage before LC filter (thanks to the snubbers 🙄)


So quite good result; just to much 3rd harmonic, but sounds (very) good.


I'm aware that is not SuperHyperMegaPro HiFi of the dead, it's just a simple experience to show that we can build amplifier from parts used in washing machines...

Congrats on the results! Do you have any more updates on this project?

 

[hyperaudio_121]

You need to know the Limits fpr Class D

The Limits for Class D are between 90 to 120 V DC Rail.

you need to bridge > 120V DC Rail


Class AB + Class TD no need to bridge 180 V DC no problem

Class TD Rail switcher work with about 50 khz. easy for most IGBT and Mosfet at high Voltage,

and most of 600V IGBTs will working in Class AB Section with High audio quality and without secondary beakdown problems v/s bipolar

any reference circuit

 

[Mimiragon]

Sir this post is 6 years old and these people haven't logged in since 2022-2023.