Dave VanHorn wrote:

> Because you can't "block" a magnetic field the way the picture shows..
>  It completes, always. There is no substance that can simply block the
> fields without interacting with them.

  There is however, an equally glaring error here.  The arrangement of
the magnets on the rotor is such that they form a closed magnetic loop
and exhibit no net magnetic field anyway.

  If OTOH, the rotor is a conventional synchronous motor assembly with
alternating poles, it becomes pretty evident that equal numbers of each
pole will be exposed and no net torque produced.
--
  Cheers,
        Paul B.