Motors

Motors

Industry: Electrical equipment

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Motors

frame

Electrical equipment; Motors

The supporting structure for the stator parts of an AC motor; in a DC motor the frame usually forms a part of the magnetic coil. The frame also determines mounting dimensions (see frame size).

breakdown torque

Electrical equipment; Motors

The maximum torque a motor will develop at rated voltage without a relatively abrupt drop or loss in speed.

Refers to a set of physical dimensions of motors as established by NEMA. These dimensions include critical mounting dimensions. 48 and 56 frame motors are considered fractional horsepower sizes even ...

canopy (dripcover)

Electrical equipment; Motors

A protective cover placed on the top of a motor being mounted vertically to protect it from liquids or solids that might drop onto the motor. (It acts similar to an umbrella for the motor.

frequency

Electrical equipment; Motors

The rate at which alternating current makes a complete cycle of reversals. It is expressed in cycles per second. In the U.S. 60 cycles (Hz) is the standard while in other countries 50 Hz (cycles) is ...

armature resistance

Electrical equipment; Motors

Armature resistance is measured in ohms at 25f C. (cold.)

externally ventilated

Electrical equipment; Motors

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 ...