CONSTRUCTION OF ROTOR WITH NEODIMIUM MAGNETS IN 3PH AC MOTOR:
Note:
This particular 3ph AC motor modified to have a permanent magnet rotor did not work so well actually - most probably because the neodimium magnets were too strong; and they would over-saturate the cores...but still, the construction details shown here in photos should be of interest.
This particular motor had an odd quirk - with the "stock" rotor, it would rocket in rpms way past its sinewave crusiing speed of 3600rpm and just keep going (scary!) - the plug had to be pulled after ten seconds maximum... this occured only if there was no load on the shaft and while in "rotovertor" configuration.
Eventually this 1/3hp marathon-brand 3ph AC motor had its original 3ph rotor installed back into it and was actually shipped to Norway to spin an excellent Bill Muller-type of dynamo/generator that someone there had constructed, and it is now being used as the "prime mover" (the motor) of a motor-generator sytem that now is operating in "overunity". (more watts out than in)
ROTOR CONSTRUCTION DETAILS:
3ph rotor next to discs cut
for new PM-type rotor replacement:
Rotor sliced down middle in order
to drill out holes to contain magnets:
Construction of rotor:
Finished PM rotor, inside of and next to stators:
