I missed this thread and didn't see it till just then.
To be quite honest, none of my teachers ever got into that level of detail, much less what the term meant. (In fact, I had to look it up to understand what you were talking about).
For us (I mean our group, not aikidoka collectively), "focussed power" is intrinsic in the movements. The interesting thing about *how* we were taught is the way in which these things are "revealed" *when* you are ready. It reveals itself in the middle of the movement and it's as if a light goes on in your head.
Since it is intrinsic in the movement and the technique, there are points in the middle of the technique where you can *feel* that your body is in correct alignment, your posture is correct, your ma-ai is correct, your breathing is correct and your extension is correct etc. etc. There comes a point where all the elements of body, mind, spirit are in harmony, resulting in this "concentration of power".
And then you try to "find the feeling" again, only to find it eludes you, because your mind is no longer in harmony.
So, I would say, (at leat in our group), that generation of this power is not explicitly taught in the circularity of movement as such, but develops *naturally*, as a result of the unification of all of the necessary factors that result in the ultimate concentration of power.
i.e. one develops this focussed power naturally, as a result of one's progression and abilities through correct attitude in training (that of quiet introspection), feeling what your body is doing, feeling what uke is doing.
It's slower to progress this way, and harder to obtain instant results, but the skill and knowledge thus acquired, becomes permanently a part of you.
Hope this answers your question.