Abstract:
A plastic closure cap for an electric motor comprising a central disc portion for closing one end of a stator cavity of the motor, a peripheral rim portion which engages the periphery of the stator to mechanically secure the closure cap thereto, and a thrust surface portion for limiting end play or travel of the motor shaft and axially locating the same.
Abstract:
In stepping and synchronous inductor motors, rotor poles, which partially overlap stator poles at the usual annular working air gap, are successively coerced by magnetic fluxes emanating from stator windings disposed in line with the machine axis and between iron pieces. Magnetomotive vectors rotate around and reciprocate along the axis. Novel arrangements of iron pieces and their pole configurations aggregate classic reaction forces around the air gap periphery. Power is supplied by pulse trains or single and polyphase alternating current.
Abstract:
To permit submerged operation, the motor is formed as a synchronous motor, in which a coil is totally encapsulated in plastic material, the coil being toroidal and having end ferromagnetic disks above and below the coil, the disks being alternately supplied with inner pole faces, in the form of sections or strips of a cylinder, defining a cylindrical space within which a permanent magnet rotor can rotate. The cylindrical strips are formed with cut-outs, so that the magnetic field will be unsymmetrical, thus establishing a rotating field. The pole faces are separated from the rotor by plastic material, the rotor being integrally connected to the hub of an impeller for the pump.
Abstract:
A miniature synchronous motor having a pot shaped core of high permeability magnetic material and having a central leg and an annular periphery, an energizing coil wound upon the central leg, a circular disc rotor rotatably journalled on the central leg, and an annular stator disposed on the annular periphery to closely surround the rotor.