LEESON Electric Corporation

ELECTRIC MOTORS, GEARMOTORS AND DRIVES


Glossary of Terms

 
Underwriters Laboratories (UL):
Independent United States testing organization that sets safety standards for motors and other electrical equipment.
 
Vector Drive:
An AC drive with enhanced processing capability that provides positioning accuracy and fast response to speed and torque changes. Often used with feedback devices in a closed-loop system.
 
Voltage:
A unit of electromotive force that, when applied to conductors, will produce current in the conductors.
 
Watt:
The amount of power required to maintain a current of 1 ampere at a pressure of one volt when the two are in phase with each other. One horsepower is equal to 746 watts.
 
Winding:
Typically refers to the process of wrapping coils of copper wire around a core. In an AC induction motor, the primary winding is a stator consisting of wire coils inserted into slots within steel laminations. The secondary winding of an AC induction motor is usually not a winding at all, but rather a cast rotor assembly. In a permanent magnet DC motor, the winding is the rotating armature.
 
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