A permanent split capacitor electric motor is constructed by using existing components of a known shaded pole motor design to reduce engineering, tooling, inventory and other manufacturing costs of the new motor and, potentially, the known design through economics of scale. The alterations to the known motor principally involve different winding circuits and the addition of a capacitor. The new motor can be reversed with a single switch circuit.

A submersible motor unit is used to drive a pump and is submerged with the pump in liquid (water). The motor unit includes a tubular housing member and a tubular inner member which is enclosed by and disposed in a coaxial relationship with the tubular housing member. A stator is disposed in a stator chamber formed between the tubular inner member and the tubular housing member. A rotor is disposed in a rotor chamber disposed within the inner member. End walls close opposite ends of the tubular housing member and the tubular inner member. An annular capacitor is disposed in the stator chamber in an axially spaced apart relationship with the stator. The capacitor extends around the rotor chamber. A body of potting compound is disposed in the stator chamber and at least partially encloses the stator and the capacitor.

An electric motor having a circular stator with angularly spaced, radially inwardly extending teeth that define winding slots therebetween. The teeth inner ends define a bore whereat the motor rotor is located. The stator is made of a plurality of bound laminations of magnetically permeable material. The end lamination includes tab portions between the stator teeth which are punched out of the same stock material during the punching process and which are, thereafter, bent to extend away from the stator. The bent tab portion provided a resting ledge whereat wire extending between the coils on the stator teeth extends over and is retained away from the rotating rotor. The tabs further aid in properly locating the wire from coil to coil during the winding process. The tab portions have a rounded, semi-circular end part to prevent the snagging and possible damage of the wire during the initial winding process.

An asynchronous salient pole induction motor having a stator core with equally-spaced teeth with inner ends having equal angular extent and defining a bore whereat a squirrel cage rotor is provided. A main field winding includes serially connected coils embracing alternate stator teeth and connected across a single phase source of alternating current. An auxiliary field winding includes serially connected coils embracing consecutive teeth intermediate the teeth having the main winding coils thereon. The auxiliary winding coils are phase displaced from the main winding coils. Each of the teeth faces at their inner ends are shaped for increasing the air gaps on both sides of the center line longitudinal plane of each tooth thereby increasing the magnetic reluctance between each of the teeth and the rotor on both sides of the center line plane. The laminations are first punched with circular shaped teeth inner ends and thereafter are punched to remove a cut-away portion from the teeth inner ends substantially near the tips of the teeth furthest away from the center line plane.

An electromagnetic coil is disposed in a rotor, and electrically insulated from the rotor. A slip-ring is supported by a rotor through a slip-ring supporter, and rotates with the rotor. A brush is supported by a compressor boss portion through a brush supporter, and supplies an electric current to the slip-ring. A diode is disposed in the brush supporter or the slip-ring supporter, and absorbs a surge voltage which is inducted when said electromagnetic coil is disenergized.