I've been researching DC drives for a 90V motor I have, and today I spoke to a technical person at KB who said that some motors are "rated" for PWM controllers with Form Factors close to 1, and some are rated for SCR controllers with Form Factors of >1.3 or 1.37. He said using a PWM controller could actually cause problems with the bearings on a motor designed to be used with an SCR drive.
So I checked with Granger who also said using a PWM controller with my motor might cause problems with the bearings. The motor is form factor rated at 1.3.
I don't understand how a "smoother" DC supply would cause problems. Can anyone explain that to me?
So I checked with Granger who also said using a PWM controller with my motor might cause problems with the bearings. The motor is form factor rated at 1.3.
I don't understand how a "smoother" DC supply would cause problems. Can anyone explain that to me?