Motors

Motors

Industry: Electrical equipment

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Motors

Large motors

Electrical equipment; Motors

Usually refers to AC motors in 5,000 series frames and above and to 500 series frames and larger in DC.

Load

Electrical equipment; Motors

The burden imposed on a motor by the driven machine. It is often stated as the torque required to overcome the resistance of the machine it drives. Sometimes "load" is synonymous with "required ...

Locked rotor current

Electrical equipment; Motors

Steady state current taken from the line with the rotor at standstill (at rated voltage and frequency). This is the current seen when starting the motor and load.

Locked rotor torque

Electrical equipment; Motors

The minimum torque that a motor will develop at rest for all angular positions of the rotor (with rated voltage applied at rated frequency).

A motor converts electrical energy into a mechanical energy and in so doing, encounters losses. These losses are all the energy that is put into a motor and not transformed to usable power but are ...

Lubrication

Electrical equipment; Motors

In order to reduce wear and avoid overheating certain motor components require lubricating (application of an oil or grease). The bearings are the major motor component requiring lubrication (as per ...

Magnetic polarity

Electrical equipment; Motors

It is a fundamental principle of a winding that adjacent poles must be wound to give opposite magnetic polarity. This does not mean that the coils actually have to be wound in this direction before ...