- Industry: Electrical equipment
- Number of terms: 4774
- Number of blossaries: 0
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The current that flows in the armature winding of a DC motor tends to produce magnetic flux in addition to that produced by the field current. This effect, which reduces the torque capacity, is called armature reaction and can effect the commutation and the magnitude of the motor's generated voltage.
Industry:Electrical equipment
A totally enclosed enclosure which is constructed to withstand an explosion of a specified gas, vapour or dust which may occur within it. Should such an explosion occur, the enclosure will prevent the ignition or explosion of the gas or vapour which may surround the motor enclosure. These motors are listed with Underwriter's Laboratories.
Industry:Electrical equipment
Armature resistance is measured in ohms at 25f C. (cold.)
Industry:Electrical equipment
A motor using an external cooling system. This is required in applications where the motor's own fan will not provide sufficient cooling; this is true for certain duty cycle applications, slow speed motors, also in environments with extreme dirt. Often a duct with an external blower is used to bring clean air into the motor's air-intake.
Industry:Electrical equipment
The force or loads that are applied to the motor shaft in a direction parallel to the axis of the shaft. (Such as from a fan or pump.)
Industry:Electrical equipment
A term commonly used to describe the stationary (Stator) member of a DC Motor. The field provides the magnetic field with which the mechanically rotating (Armature or Rotor) member interacts.
Industry:Electrical equipment
The back end of a normal motor is the end which carries the coupling or driving pulley. (NEMA) This is sometimes called the drive end (D.E., pulley end P.E.) etc.
Industry:Electrical equipment
The introduction of resistance in series with the shunt wound field of a DC motor to reduce the voltage and current which weakens the strength of the magnetic field and thereby increases the motor speed.
Industry:Electrical equipment
The speed which a DC motor develops at rated armature and field voltage with rated load applied.
Industry:Electrical equipment
Mounting endshield with special rabbets and bolt holes for mounting such equipment as pumps and gear boxes to the motor or for overhanging the motor on the driven machine.
Industry:Electrical equipment
