Most Permanent Magnet (PM) motors were designed to be used with Silicon Controlled Rectifier (SCR) DC drives. With the advent of Pulse Width Modulated (PWM) drives, LIKE THE QDT SERIES, several things occur which allow the same motor to produce a higher Horse Power. This is a result of the form factor of a PWM drive being much less than that of a SCR DRIVE. The typical form factor for an SCR drive is 1.4 while the form factor for a PWM drives is less than 1.05. One of our Suppliers has prepared the following list of PM motors which we recommend when using our QDT series of drives. Notice the increase in horsepower when using PWM drives.
|RATED HP FF1.4||FRAME||RATED RMP||RATED VOLTS||POLYSPEDE CATALOG NUMBER||RATEED HP 1.05 FF|
Diameter of an SS56C is 4.88″ and a S56C is 5.61″