What are the basic principles of operation for PAYBACK variable speed drives?
The magnetic coupled concept differs vastly from Variable Frequency Drives in that there is no electrical power interruption to the motor. With the motor running continuously, precise speed control is accomplished by varying the magnetic coupling between the motor’s output shaft and the load. Most configurations are comprised of two primary elements: (a) electromagnet (multi-pole rotor) (b) steel drum (armature) One element (input portion) is affixed to the motors shaft so as to run continuously. The other element (output portion) will have a connection to the driven load. These two elements are separated by an air gap, and have no other mechanical connection other than supportive bearings. By applying current to the coil of the electromagnet rotor, a polarized magnetic field is produced, creating eddy currents on the surface of the drum, magnetically coupling both components and causing the output portion to turn in the same direction as the motor. The speed of the output is dependent
