A pure homopolar motor (PHM)
[
]
is an
electric motor not requiring
brushes
A brush is a common tool with bristles, wire or other filaments. It generally consists of a handle or block to which filaments are affixed in either a parallel or perpendicular orientation, depending on the way the brush is to be gripped durin ...
,
electronics, or
semiconductor parts to convert
direct current into
torque. In other words, this
homopolar motor
A homopolar motor is a direct current electric motor with two magnetic poles, the conductors of which always cut unidirectional lines of magnetic flux by rotating a conductor around a fixed axis so that the conductor is at right angles to a s ...
only requires a theoretical
homogeneous
Homogeneity and heterogeneity are concepts often used in the sciences and statistics relating to the uniformity of a substance or organism. A material or image that is homogeneous is uniform in composition or character (i.e. color, shape, siz ...
or actual (constantly or cyclically) homogenized
magnetic field
A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. A moving charge in a magnetic field experiences a force perpendicular to its own velocity and to ...
and
direct current, similarly to the
Faraday Homopolar Motor (FHM). 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
A brush is a common tool with bristles, wire or other filaments. It generally consists of a handle or block to which filaments are affixed in either a parallel or perpendicular orientation, depending on the way the brush is to be gripped durin ...
. This term unifies all devices that work in line with this definition. Examples include the following pure homopolar motor
patents: US5977684 (A), PV2011-293 (CZ) application number 2011-293, AU5801890 (A)
Another group of
patents with a
superconductor shield
A shield is a piece of personal armour held in the hand, which may or may not be strapped to the wrist or forearm. Shields are used to intercept specific attacks, whether from close-ranged weaponry or projectiles such as arrows, by means of a ...
or shield made of so far unknown material (low-voltage
semiconductor with high
current permeability or material that excludes
magnetic field
A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. A moving charge in a magnetic field experiences a force perpendicular to its own velocity and to ...
at normal temperatures): US5144179 (A), DE102012022152 (A1), CN1671030 (A)
See also
Pure homopolar generator
General
*
Rotating magnetic field brushless motors with electronics
References
External links
*
References to related patents and activities
*
*
*
*
Another group
*
*
*
*
*
*
Activities
*
{{col-end
Electric motors