Abstract: Disclosed in one example is an idler roller for a conveyor belt weighing system, comprising a static shaft, and a load cell fixed to the static shaft and positioned at least partially internal to the static shaft and at an end of the static shaft, the load cell for supporting the idler roller on a frame. A rotating shaft seal is positioned on an exterior surface of the static shaft and internal to the idler roller. A static seal is positioned between the load cell and an interior surface of the static shaft. The static shaft includes a first pocket into which the load cell is inserted and fixed, the static shaft also includes a second pocket into which the load cell is inserted and fixed. The load cell includes one or more strain gauges, and the load cell is rigidly fixed in the end of the static shaft.

Abstract: A 2-pole machine arrangement (10) has a stator (100) with windings (101) in conventional form, wound either in a single phase or three phase configuration. The rotor is formed of stacked laminations. The laminations include rotor pole pieces (107) located between the two magnetic poles. Each pole is formed by a pair of (embedded) permanent magnets (103), angularly spaced-apart by inter-magnet segments (106). The rotor pole pieces (107) include a series of evenly-spaced slots (109) and a central void (108). The slots (109) are of various lengths to direct the flux from the magnets (103) into the air gap (121) at a desired angle normal to the rotor surface. The slots 109 may be varied in width and angle to achieve the desired lowest waveform distortion under load and the highest air gap flux. The slots (109) also contribute to changing the saliency of the rotor.

Abstract: A 2-pole machine arrangement (10) has a stator (100) with windings (101) in conventional form, wound either in a single phase or three phase configuration. The rotor is formed of stacked laminations. The laminations include rotor pole pieces (107) located between the two magnetic poles. Each pole is formed by a pair of (embedded) permanent magnets (103), angularly spaced-apart by inter-magnet segments (106). The rotor pole pieces (107) include a series of evenly-spaced slots (109) and a central void (108). The slots (109) are of various lengths to direct the flux from the magnets (103) into the air gap (121) at a desired angle normal to the rotor surface. The slots 109 may be varied in width and angle to achieve the desired lowest waveform distortion under load and the highest air gap flux. The slots (109) also contribute to changing the saliency of the rotor.

Abstract: There is provided an electromagnetic machine (100) having an inner and outer stator (110), and a rotor and a plurality of magnets (140) embedded in the rotor (130). The magnets (140) are configured such that the orientation of the magnetic polar axis of each magnet (140) is tangential to the direction of rotation of the rotor (130) and the magnetic polar axis of each magnet is opposite to the direction of the magnetic polar axes of the adjacent magnets to provide radial magnetic fields.

Abstract: A motor or alternator comprises a number of permanent magnets (34, 36) arranged about the periphery of a rotor (30). The magnets (34, 36) are encompassed by stator coils (44) pressed over and supported on the stator housing (41) between fins (39). The magnets (34, 36) are arranged with their like poles facing each other while the stator coils (44) are arranged in a C-shape or a U-shape configuration about the permanent magnets allowing the magnets (34, 36) to rotate within the toroidal space defined by the stator coils (44). The rotor (30) is made of a non-magnetic material which may include an electrical conductor such as aluminum or a highly resistive material such as a plastics material. The number of stator coils (44) will depend on the phase excitation used (a 3-phase motor is described) with the commutation of the coils being supplied either mechanically or electronically.