Motors

Motors

Industry: Electrical equipment

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Motors

enclosures

Electrical equipment; Motors

The housing, frame, of the motor of which there are two broad classifications; open and totally closed. There are specific types of each:

bearing life

Electrical equipment; Motors

Rating life, L10 (Bl0), is the life in hours or revolutions in which 90% of the bearings selected will obtain or exceed. Median life (average life), L50(B50)

A figure of merit which indicates how much rectified current departs from pure (non-pulsating) DC. A large departure from unity form factor (pure DC, expressed as 1.0) increases the heating effect of ...

brakes

Electrical equipment; Motors

An external device or accessory that brings a running motor to a standstill and/or holds a load. Can be added to a motor or incorporated.

form wound

Electrical equipment; Motors

A type of coil in which each winding is individually formed and placed into the stator slot. A cross sectional view of the winding would be rectangular. Usually form winding is used on high voltage, ...

braking torque

Electrical equipment; Motors

The torque required to bring a motor down to a standstill. The term is also used to describe the torque developed by a motor during dynamic braking conditions.

fractional-horsepower motor

Electrical equipment; Motors

A motor usually built in a frame smaller than that having a continuous rating of one horsepower, open construction, at 1700 -1800 rpm. Within NEMA frame sizes FHP encompasses the 42, 48 and 56 ...