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Commonly used terms in the Electrical industry.
brushless DC motor
See
electronically commutated machine
DC motor
a motor that operates from a DC power supply. Most DC motors have a field winding on the stator of the machine that creates a DC magnetic field in the airgap. The armature winding is located on the rotor of the machine and the DC supply is inverted by the commutator and brushes to provide an alternating current in the armature windings.
DC motor drive
a converter designed to control the speed of DC motors. Controlled rectifiers are generally used and provide a variable DC voltage from a fixed AC voltage. Alternatively, a chopper, or DC-DC converter, can be employed to provide a variable DC voltage from a fixed DC voltage.
definite time DC motor acceleration
when DC motors accelerate during their starting sequence, starting resistors are removed from the armature circuit in steps. In definite time DC motor acceleration (also referred to as open loop DC motor acceleration), the starting resistors are removed in definite time increments, whether the motor is actually accelerating or not.
permanent magnet DC motor
See
permanent magnet DC machine