A switched reluctance motor (M) comprises a stator assembly (SA) including a stator (S) having a central bore (B) and a plurality of inwardly extending salient teeth (ST). A plurality of stator windings (W) are installed on the stator teeth. A rotor assembly (RA) includes a (R) rotor mounted on a rotor shaft (RS) and installed in the central bore for rotation with respect to the stator assembly. The rotor assembly has a pluralitry of outwardly extending salient teeth (RT) with gaps (G) extending lengthwise of the rotor assembly between adjacent rotor teeth. A noise reducer assembly (10) installed on the rotor assembly reduces the noise produced by the rotor when the motor is operating at normal speeds. The assembly includes a lug (14) made of an electrically non-conducting material inserted in each rotor gap and extending the lengthwise of the rotor assembly. Each lug is hollow with sidewalls (16A, 16B) and an inner endwall (16C) all of whose contours generally form mating contours with the respective sidewalls of the rotor poles and the contour of the rotor at the inner end of a gap. An outer endwall (16D) of a lug has a curved contour the curvature of which generally corresponds to the curvature of the outer face of the rotor poles. The lugs produce a surface between the outer faces of the adjacent rotor poles which generally conforms to the outer surface (F) of the rotor poles for the outer surface of the rotor assembly to be generally uniform thereabout. This helps reduce motor noise. The assembly also includes a cap (20) fitting over each end of the rotor assembly. The lugs are attached to the cap so to install the lugs on the rotor assembly.
Electric machine in which parts subject to magnetostrictive forces are sized and configured in a particular manner. Such parts (1) have radial dimensions that vary along the axial direction. The pads are formed by laminations (12) that are assembled in an alternated arrangement, either individually or by groups, and have differing inner and/or outer dimensions and/or shapes. Such a solution is instrumental in reducing the noise caused by vibrations brought about by the electromagnetic forces generated by the machine.
A switched reluctance motor having a rotor and a stator is disclosed. The stator has a plurality of peripherally spaced stator poles, each being defined by an inner curvilinear face, which is generally aligned with the curvilinear faces of adjacent stator poles in a circumferential path. A plurality of stator inserts are also provided that are disposed between adjacently spaced stator poles. Each stator insert has a curvilinear face that is generally aligned in the same circumferential path with the curvilinear faces of adjacently spaced stator poles to reduce siren noise. Each stator insert is also constructed to include at least one pocket opposite its curvilinear face for receiving a magnet to facilitate positioning of the rotor relative to the stator poles. Each stator insert is further provided with oppositely extending arms for receiving and mounting a pre-wound stator coil or "wound-in-place" coils. A method of assembling the pre-wound coil relative to adjacent spaced stator poles and stator inserts is also disclosed.
A switched reluctance motor comprised of a stator having a plurality of evenly spaced, radially oriented, like stator poles that define a gap between adjacent stator poles. Windings for three phases are wound about the stator poles wherein a stator pole of a first phase is disposed circumferentially between a winding and an associated stator pole of a second phase and a winding and an associated stator pole of a third phase. A rotor is mounted for rotation relative to the stator. The rotor has an even number of rotor poles, the rotor poles being dimensioned such that when one of the phases is energized, the rotor poles operatively interact with the energized stator poles such that the motor moves from a first state wherein half of the rotor poles are magnetically coupled to a like number of the stator poles to a second state wherein all of said rotor poles are magnetically coupled to a like number of stator poles.
A switched reluctance machine includes a first element having a plurality of uniform poles and a second element having a first pole and a second pole. The first pole has a wide face and the second pole has a narrow pole face. The first and second elements are disposed for movement relative to each other such that the wide and narrow poles are moveable in spaced relation to the plurality of uniform poles.
A switched reluctance machine includes a first element having a plurality of uniform poles and a second element having a first pole and a second pole. The first pole has a wide face and the second pole has a narrow pole face. The first and second elements are disposed for movement relative to each other such that the wide and narrow poles are moveable in spaced relation to the plurality of uniform poles.
