Hello,iamMuDe,memberofYaan Electricteam.i will show you, how to rewind and renovateoldelectricsinglephaseelectricmotor.
I bought this electric motor on garage sale. It was cheapandweknow thatmotorburnedout.Idecided to buy motor and try torenovate it.
In next steps I will show you how do disassemble electric motor, remove bearings, make winding diagram, rewind motor, chose right capacitor and reassemble it with new bearings.
Rewinding is very long process. It took about two daystorewindit,replacealloldpartsandreassemble it.
Step 1: How Do I Know If I Have Single Phase Motor?
Singlephasemotorusuallyhastwocoils,mainwith bigger resistance (generating a pulsating magnetic field) and auxiliary with smaller resistance (gives motor a direction of rotation). There must be a capacitor on the motor. Its value is different for different electric engines (for smaller electric engines around20microF).2capacitorcanbeonmotor,"run" capacitor (always connected, lower value capacitor) and"Start"capacitor(connectedwithcentrifugal
switch, higher value capacitor)
Picture 1: Scheme of single phase electric motor Picture 2: Run and star capacitor Picture3:Wiresfromstator(thereshouldbe4wires fromstator)
Step 2: Tools
Rewinding and disassembling motor is very time consuming work, if you don´t have professional equipment. You will need following tools:
Basic tools (screwdrivers, hammers,wrenches...
Special Material:
Copperwire
Isolate paper
Pulleys forbearings
Chisels, to cut off oldwinding
Butane torch (or other heatingdevice)
Stator lacingthread
Spray Lubricant (WD-40 orsimilar)
Motorlacquer
Step 3: Disassembling Motor
Takefewpicturesofmotor,andRemovethefanprotectivecover.Usuallythecoverisnotscrewedwithscrewson housing but it's just plugged onhousing.
Put all removed parts of motor in one box so you don't lose them.
Step 4: Disassembling Motor
Gentlyheatupmotorfanandremoveit.Becarefulyoudon'tbreakit,itshouldgoverysmooth.Youcanhelp yourself detaching it with two bigscrewdrivers.