| 摘要 |
An electric motor is disclosed having stator and magnetic field gradients that taper from strong to weak. The stator is divided into north and south pole sections which each define half of a cylindrical cavity for axially receiving the rotor. The stator magnetic field gradient is established by north and south pole stator sections each having an axial cross section defined by first and second overlapping circles. The first circle is centered on the axial centerline of the motor. The second circle is centered on the vertical centerline of the motor and is provided with a radius approximately equal to the diameter of the first circle. The first and second circles intersect at a common tangent to define the weakest of the north and south pole sections of the stator. A tangent of the first circle spaced 180 DEG from the common tangent of the first and second circles intersects the second circle to define the strongest of the north and south pole sections of the stator. The rotor is shunt wound and is connected to a resistance network by commutator and brushes for establishing a rotor magnetic field gradient. Commutator action maintains the strongest and weakest north and south pole seeking sections of the rotor windings adjacent the strongest and weakest north and south pole sections of the stator magnetic field, respectively.
|
