Product Manual

-41-

Insulated Bearings

Insulated or ceramic bearings eliminate the path to ground through the

bearing for current to flow.

Torque-speed Characteristics of Motors:

• The amount of torque produced by a motor generally varies with

speed.

• This Torque-Speed characteristic depends on the type and design

of a motor, and is often shown on a Torque-Speed graph.

Figure 2.2

Typical Torque-Speed Graph

Some important factors indicated by the graph include:

(a) Starting torque - the torque produced at zero speed;

(b) Pull-up torque - the minimum torque produced during acceleration

from standstill to operating speed;

produce before stalling.

RATED

TORQUE

% RATED SPEED