A variable DC servo will last for some time. Just make sure to properly keep it maintained.
Since the motor is a replacement for a clutch motor you should expect your motor to last a very long time. The motor comes with a full year warranty.
Variable
Variable speed drivers are necessary to be able to have different speed settings in a motor.
motor can be control by using variable frequency drive
For what?
Yes, it is.
variable voltage control has some limitations as you decrease the voltage corresponding phase current will increase lead to increase of flux which lead to saturation of motor core and heating of motor to make flux constant and vary speed of motor v/f ratio need to be maintained constant
Variable frequency Drive is not compatible with a DC Motor. VFD can be used only with AC motors, where frequency plays a key role in defining the speed of the motor.
Purchasing of motor vehicle is example of fixed cost while using fuel for running those motor vehicles is a variable cost.
A variable frequency drive (VFD) refers to AC drives only and a variable speed drive (VSD) refers to either AC Drives or DC Drives. VFD's vary the speed of an AC motor by varying the frequency to the motor. VSD's referring to DC motors vary the speed by varying the voltage to the motor.
Primary Motor Cortex
AMSOIL Inc. does in Superior, Wisconsin.
It is depends on the application. If we need any variable speed in motor, dc motor will be better choice.