Pure homopolar motor
A pure homopolar motor
is an electric motor not requiring brushes, electronics, or semiconductor parts to convert direct current into torque. In other words, this homopolar motor only requires a theoretical homogeneous or actual homogenized magnetic field and direct current, similarly to the Faraday Homopolar Motor. The theory of PHM is usually explained using Maxwell's equations. In basic courses on theoretical physics you can learn that such a system should be functional and independent of brushes. This term unifies all devices that work in line with this definition. Examples include the following pure homopolar motor patents: US5977684, PV2011-293 application number 2011-293, AU5801890
Another group of patents with a superconductor shield or shield made of so far unknown material : US5144179, DE102012022152, CN1671030General
