Large Motors: Usually refers to AC motors with 5000 series frames and above or DC motors with 500 series frames and larger.

Line Count: Line count is the number of equally spaced radial lines per 360 mechanical degrees on the incremental encoder code disk.

Load: 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 power.

Locked Rotor Current: 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: 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 converted into heat causing the temperature of the windings and other motor parts to rise.

Lubrication: In order to reduce wear and avoid overheating certain motor components lubrication is required (application of an oil or grease). The bearings are the major motor component requiring lubrication (as per manufacturer's instructions). Excess lubrication can however damage the windings and internal switches, etc.



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