초록 ▼

The magnet frame of a dynamoelectric machine comprises a removable, generally cylindrical inner member concentrically disposed inside a cylindrical outer member. The inner member is supported in a cantilever fashion at only one of its ends, and most of its outside surface is normally separated by a

The magnet frame of a dynamoelectric machine comprises a removable, generally cylindrical inner member concentrically disposed inside a cylindrical outer member. The inner member is supported in a cantilever fashion at only one of its ends, and most of its outside surface is normally separated by a relatively small circumferential gap from the cooperating inside surface of the outer member. The outer member of the frame rotatably supports the hub of a motorized wheel, which hub is coupled via a torque tube and gearing to a rotor inside the inner member. Conventional means is provided in the inner member for producing a field of magnetic flux in both the magnet frame and the rotor, and the path of this flux will include parallel branches in the inner and outer frame members.

대표청구항 ▼

For propelling a traction vehicle having a frame and a rotatable wheel, a dynamoelectric machine including; a. a stator yoke comprising (i) an outer hollow cylindrical member of relatively large diameter adapted to be secured to said frame and (ii) an inner hollow cylindrical member of smaller diame

For propelling a traction vehicle having a frame and a rotatable wheel, a dynamoelectric machine including; a. a stator yoke comprising (i) an outer hollow cylindrical member of relatively large diameter adapted to be secured to said frame and (ii) an inner hollow cylindrical member of smaller diameter nested generally concentrically inside said outer member, (iii) both of said members being made of magnetizable material, (iv) said inner member being removably mounted to the outboard end of said outer member and, when so mounted, having most of its convex outside surface normally spaced by a small gap from the cooperating concave inside surface of said outer member; b. means for rotatably supporting said wheel on the outside of said outer member; c. a rotor supported concentrically within said inner member so as to be rotatable with respect thereto, said rotor comprising a cylindrical core of magnetizable material disposed in spaced relation to said inner member; d. means including a speed-reducing gear train for mechanically coupling said rotor to said wheel; and e. means for producing a field of magnetic flux in said stator yoke and said core, the path of the flux in said yoke including parallel first and second branches in said inner and outer members, respectively, with said second branch carrying a substantial portion of said flux; f. said first branch of said flux path having a cross-sectional area such that the magnetic flux density in said first branch would be appreciably greater than an intrinsic saturation limit if said first branch alone were carrying all of the flux that is produced when said machine is operating at its maximum continuously rated load.