You can use an angle grinder with a metal cut off wheel or even a metal chop saw to cut open the refrigerator compressors.
Once you cut the tops off the fridge compressors then the motor will be bolted inside of it. You just remove the bolts and the motor will slide out.
Then remove the little plastic shims between the copper winding's. Once those are removed then cut the string that is wrapped around the wire and then the wire just just pull out.