This implies that the yogi must push down the charged energy so that it does reach the base chakra, muladhar. 

There are many people doing rapid breathing pranayama but I never heard of them raising kundalini, is it because the breath doesn't reach the root chakra?

When I do rapid breathing for quite a while nothing is happening, so I assume the breath energy isn't going down there.

How can I make it so it reaches the root chakra?