Module 1 : Introduction to Electric Drives

Type of Loads (Cont.)

Dry Friction Load OR Coulomb Friction


  • It is a passive load to the motor.

  • Load torque is independent of the speed of the motor.

  • Characterized by the requirement of an extra torque at very near zero speed.

  • It is also known as break away torque or stiction.
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Dr. K. R. Rajagopal