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The direct current (DC) motor is one of the first machines devised to convert electrical power into mechanical power. Permanent magnet (PM) direct current convert electrical energy into mechanical These brushes typically remain stationary with the motor's housing but ride (or brush) on the rotating commutator.
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www.pc-control.co.uk/dc-motors.htm
www.pc-control.co.uk/dc-motors.htm
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Electric motor - Wikipedia, the free encyclopedia
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An electric motor is a device using electrical energy to produce mechanical energy, nearly always by the interaction of magnetic fields and current-carrying conductors. The reverse process, that of ...
en.wikipedia.org/wiki/Electric_motor
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Brushless DC electric motor - Wikipedia, the free encyclopedia
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A brushless DC motor ( BLDC ) is a synchronous electric motor which is powered by direct-current electricity (DC) and which has an electronically controlled commutation system, instead of a mechan...
en.wikipedia.org/wiki/Brushless_DC_electric_motor
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The guts of a disassembled Mabuchi FF-030-PN motor (the same model that Solarbotics sells) are available for you to see here (on 10 lines / cm graph paper). This is a basic 3-pole DC motor, with 2 brushes and three commutator contacts.
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www.solarbotics.net/starting/200111_dcmotor/200111_dcmo...
www.solarbotics.net/starting/200111_dcmotor/200111_dcmotor2.html
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For a given motor rpm, the smaller the commutator diameter, the lower the surface speed and the greater ... In a DC motor, commutation is the process of periodically reversing the current flowing in individual armature coils in order to maintain unidirectional torque as the armature coils move under alternate field poles.
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www.reliance.com/prodserv/motgen/c7090/
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Common commutator wear patterns. It's relatively easy to judge DC motor performance by looking at the commutator. During normal commutation, brush current vaporizes some copper molecules, depositing a uniformly tan to charcoal-brown copper-oxide film (about 2 in.310-7 in.
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ecmweb.com/mag/electric_maintaining_dc_motors/
ecmweb.com/mag/electric_maintaining_dc_motors/
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Tags: commutator, motor ... OK, so I have a lab on wednesday for building a DC motor using nothing but 6 paper clips, 6 conducting thumbtacks, 0.8m lengths of 22, 26, and 30 gauge wire, sand paper, a base for everything, and a 6V battery.
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www.physicsbanter.com/electromagnetic-theory-applicatio...
www.physicsbanter.com/electromagnetic-theory-applications/83232-dc-motor-commutator.html
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It is an object of this invention to provide an improved DC motor comprising a commutator rotor designed to overcome the aforementioned problem by means of a commutator which has fewer parts, is easy to manufacture with the required precision,and can be miniaturized.
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www.patentgenius.com/patent/4716330.html
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9. In a d.c. electric motor including commutator segments defining a substantially cylindrical outer surface and brushes engaging said outer surface, the improvement comprising circumferentially extending striations between 0.02 mm and 0.06 mm deep in the outer surface of the commutator with sharp edged ridges between...
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www.freepatentsonline.com/4763036.html
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