QM Power featured in Control Engineering
Dan Jones. “Advanced motor design: New Motors Reach New Applications”. Control Engineering. February 9, 2011. http://www.controleng.com/single-article/advanced-motor-design-new-motors-reach-new-applications/091900ae47.html
QM Power is the best example of a combination of motor technologies. The new QM Power Parallel Path Magnetic Technology (PPMT) combines VR and PM technology. There are two flux patterns developed and sharing the same motor magnetic elements, one from the two PMs and the other from the VR rotor-stator winding configuration. QM Power reports that magnetic force can typically be tripled resulting in a 30% increase in power density and a similar boost in peak efficiency. It is a scalable from 100 watts to hundreds of kilowatts.
The PPMT is aimed at both constant speed and variable speed applications including traction drives. PPMT retains higher power efficiency in higher load conditions. It can achieve excellent performance with ferrite magnets.