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Originally Posted by Rickertsen2
As far as mechanically how well this works, I am very skeptical. With motors this size the brakign effect isn't all that great as anything but high speeds, and as mentioned above all the curves still apply, so as it brakes and slows things down, it will generate less back emf, and thus less "countertorque"(for lack of a better word), and thus not works as well. I implemented a system similar to this on an electric scooter as a secondary braking mechanissm and as sortof an experiment. It worked pretty well at high speeds but did little to nothing at low speeds.
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Pure braking is not so important as being able to control the DC motor (CCT) or generator (Prius) to augement/control/manipulate (not sure how to phrase this term) the planetary gears. The way I understand a CVT with a planetary gearing is that you have input DC motor that runs at optimal efficiency (To/2, wo/2). Then you run another DC motor or generator at some non-optimally efficient Tr, wr to achieve a constant T for any w at the output. To do this, you need to be able to really control the Tr, wr. I'm curious as to how the CCT does so.