Unfortunately I haven't been able to find a free copy of this paper, but it is the most recent paper on the subject. Note: it is called the "Huber effect" in the paper.
Harry http://dx.doi.org/10.1117/12.582394 Toward characterization of Huber's ball-bearing motor Proc. SPIE, Vol. 5649, 700 (2005); doi:10.1117/12.582394 Online Publication Date: 9 March 2005 Conference Date: Monday 13 December 2004 Conference Location: Sydney, Australia Conference Title: Smart Structures, Devices, and Systems II Conference Chairs: Said F. Al-Sarawi ABSTRACT Joo Liang Choo, Wen Liang Soong, and Derek Abbott The Univ. of Adelaide (Australia) A motor that can be powered up by either a DC or AC supply and rotates in either direction, based on the so-called Huber effect, is investigated. For the first time, this paper examines the motor characteristics under both DC and AC conditions, for quantitative comparisons. Earlier work has not examined, in detail, the effect of an AC supply on the Huber motor operation. Previous work on the Huber or ball-bearing motor suffered from alignment problems and herewe describe a new methodology to address this. The new construction is also a step toward a micromotor realization. The motor, with its reduced dimensions, also has the advantage of reduced operating current. Since 1959, the principle of operation of this motor has remained an unsolved mystery and various theories exist in the literature. We show various empirical findings that shed some light on the hotly contested debate. The discovery of carbon on the bearings, under AC supply conditions, reported here creates a new open question. Motor acceleration versus torque characteristics areobtained, using a data acquisition system to facilitate dynamic real-time recording. ©2005 COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
