Stator is a stationary part of the motor and some times it gets damaged by overheating or by faulty bearings or by foreign object fallen inside motor. Once damaged, old coils need to be replaced with new one. Whether you want to rewind a DC (Direct Current) Motor or AC(Alternating Current) Motor, there are three basic steps involved.
Removal of coils
Old coils are removed by cutting the coils and then removing the copper wires from the stator. You may also heat the stator first to make the varnish softer.
Winding new coils
You can wind a new coil by any of these three methods.
Winding by hand: Winding a coil yourself is a rite of passing for the serious consumer electronics enthusiast. If your coil is more than a few turns just, you’ll discover a couple of things: It really is hard to keep carefully the converts even, and side winding requires a long time. To do the work and nicely quickly, you need to use a center to blowing wind your coil around — these cores are called mandrels or bobbins. They could be wooden or metal, and a gap should be experienced by them drilled in a single end to anchor the cable. Fix the mandrel on the workbench so that it can be turned with a handle, then feed the wire onto the mandrel from the spool the wire occurs. You need to wear gloves and make an effort to maintain steady pressure while well turning the mandrel.
Winding by Drill: Utilizing a hand-held drill will accelerate things up significantly — you don’t desire a body to carry the mandrel, as drill winding is performed with out a stabilizing platform. Put one end of the mandrel in the chuck of the drill and tighten up it down. When by using a drill, you will desire a metal mandrel because the chuck of a drill shall crack a wooden mandrel. Operate the drill while feeding the wire onto the rotating drill from the spool. With just a little practice, you may make nice easy tiers by redirecting the cable by the end of every part. Wearing gloves for drill winding can be dangerous as it is straightforward to really get your glove caught in the loops.
Winding Jig: A winding jig is a real wood frame that retains the drill with an extended mandrel and has a support at the other end of the mandrel so that it can rotate openly. You should run a wire from both factors of the drill move down to the ground and make a straightforward wooden foot-operated change with a planting season that supports the turn open until you step onto it. With a well balanced rotating mandrel (fired up and off with your feet), you have both of your hands absolve to feed the wire onto the rotating mandrel. It really is safe to wear gloves with a winding jig since it is simple to regulate the distance between your hands and the mandrel — additionally it is easy to keep carefully the tension consistent, and that means you find yourself with an improved coil.
Varnishing the newly wound stator
Once coils are being wound and fixed in stator, it needs to be varnished so the winding doesn’t open up. First you need to pour varnish on coils and then bake it at 300 degrees for 6 hours. It can be repeated to achieve extra hardness. You can also include hardener in varnish to make it harder.