State different applications of capacitor start single phase induction motor
This presumes the rabbit fits, armature, etc all interchange. Or, more expensively, have your single phase stator re-wound three phase. If you have buckets of time maybe a local voc school will take it on as a class project.I remember Bill Gosseke, an old school motor re-winder.Permanent magnets are also more efficient, because no power is wasted generating the magnetic field. Here's a few reasons: If you're building a really big motor you need a very big magnet and at some point a wound field might become cheaper, especially if a very high magnetic field is needed to create a large torque. For this reason most cars have starter motors that use a wound field (although some modern cars are now using permanent magnet motors).With a permanent magnet the magnetic field has a fixed value (that's what "permanent" means!if you can slow it to 25 Hz, then it may not be what it seems you are describing. Most capacitor run motors are very poor when slowed, due to the capacitor value being wrong for the low frequency. They would also be poor speeded up, but the amount of overspeeding is normally not enough to require a new value of capacitor.
Shaded-pole and "PSC" motors can be controlled with a suitable single phase VFD, which definitely DO exist.
-- Andrew A universal motor, which can run on either 120V single phase AC or DC, can be controlled by what is commonly called a "router speed control," but is actually an SCR DC speed control, or by a simple rheostat.
The SCR controller is a better choice because it maintains constant torque.
Hi all, I am wondering if possible to add a speed control to a single phase motor, similar to how a VFD is commonly used to control a 3-phase motor.
I have a benchtop disc sander and would love the ability to control the speed on the motor.