On paper, yes. Any source for a practical implementation? With measurements?You can self-oscillate both half and full-bridge topologies. Both BD and AD approaches can be combined with self-oscillation:
https://core.ac.uk/download/pdf/9703959.pdf
Not following you on common sense. I guess I miss some. Question is proving that bridging is better. Sorry, I don't have a IEEE account.As for my other claim about bridging before the filter, it is based on common sense and power converters therapy, which you can read here:
D. G. Holmes, Thomas A. Lipo, Pulse Width Modulation for Power Converters Principles and Practice, IEEE Press., 2003.
Why doubling the complexity of something conceptually simple and working perfectly?The higher the switching frequency, the lower the load's current THD. The higher the switching frequency fed to the low pass output filter, the lower the harmonic distortion at its output because the cutoff frequency of the filter shifted to a lower frequency with respect to the switching frequency. You can easily verify this claim by simulation. You can self-oscillate a full-bridge class-d amp by using two separate control feedback loops, one for each half-bridge leg with two input source signals (positive and negative balanced input).
The full-bridge class-d, when implemented correctly, should hade better performance compared to a half-bridge class-d with the same control strategy, same switching frequency range, and the same output filter.
Moreover, since you have a PhD in engineering, you should know that each solution is a tradeoff and that no perfect solution exists.
In example, the higher the frequency, the higher the thermal losses. The higher the thermal losses, the hotter the filter. The hotter the filter, the higher distortion.
Again, you can full bridge with AD modulation. Do you have an example of a filterless BD modulated amplifier with 1kW output passing conducted and radiated emissions certification?BD-modulation (full-bridge only) could be either filter-free or filtered, while AD-modulation (half-bridge only) must be filtered. This is also an indication that full-bridge is alway superior, regardless of the modulation technique used (constant open loop PWM, or self-oscillating closed-loop).
Out of curiosity, did you compare measurements between Hypex and it's competitors? Did you find amplifiers implementing what you consider as being a technically superior solutions?