THIS PROJECT WILL DEVELOP A HIGH SPEED, DC BRUSHLESS, PERMANENT MAGNET TRACTION MOTOR USING NEODYMIUM BORON IRON AS THE PERMANENT MAGNET MATERIAL AND AN INTEGRAL SINGLE STAGE PLANETARY GEAR REDUCTION.

THIS PROJECT WILL DEVELOP A HIGH SPEED, DC BRUSHLESS, PERMANENT MAGNET TRACTION MOTOR USING NEODYMIUM BORON IRON AS THE PERMANENT MAGNET MATERIAL AND AN INTEGRAL SINGLE STAGE PLANETARY GEAR REDUCTION. THE MAGNET MATERIAL, NEWLY INTRODUCED AND DISCUSSED AT THE MMM CONFERENCE IN PITTSBURGH IN NOVEMBER 1983 AND THE INTERMAG CONFERENCE IN GERMANY IN APRIL 1984, HOLDS THE POTENTIAL FOR SIGNIFICANT SIZE AND WEIGHT REDUCTIONS FOR A GIVEN LEVEL OF OUTPUT OVER ANY OTHER CURRENTLY AVAILABLE PERMANENT MAGNET MATERIAL. MAGNETIC CIRCUIT REDUCTIONS OF 50% BELOW THESE ACHIEVABLE WITH SMCO5 APPEAR POSSIBLE. THERE ARE CRITICAL DESIGN AREAS, HOWEVER, INVOLVING LOSS OF REMANENCE AND COERCIVITY WITH INCREASING TEMPERATURE WHICH NEED TO BE ADDRESSED. IN ADDITION TO LOSS OF FLUX, POTENTIAL SUSCEPTIBILITY TO DEMAGNETIZATION FROM CROSS FIELD MAGNETIC MOTIVE FORCE IS AN AREA FOR INVESTIGATION. MEANS OF THERMALLY INSULATING THE ROTATING MAGNET STRUCTURE IN ORDER TO MINIMIZE POTENTIAL DEGRADATION ARE PART OF THIS PROJECT.