Single phase induction motor and hermetic reciprocal compressor having a single phase induction motor

A single-phase induction motor, comprising:

• a stator having a plurality of slots;
• a rotor being rotated by a magnetic field generated by an electric force between the stator and the rotor;
• a main winding and a sub winding, respectively wound through the plurality of slots of the stator,
• wherein the main winding is directly wound through a group of three adjacent neighboring slots, and skips the adjacent neighboring slots, in an alternating manner, and
• the sub winding is directly wound through a group of three neighboring slots and skips the adjacent neighboring slots such that the main winding and sub winding overlap at alternating nighboring slots.

A hermetic type reciprocal compressor, comprising:

• a single phase induction motor, and
• a compression portion for compressing refrigerant by linearly reciprocating by a driving force from the single phase induction motor, the single phase induction motor and the compression portion both being provided in a sealed casing,
• the single phase induction motor, having:
• a stator having a plurality of slots;
• a rotor being rotated by a magnetic field generated by an electric force between the stator and the rotor;
• a main winding and a sub winding, respectively wound through the plurality of slots of the stator,
• wherein said main winding and said sub winding are wound in a centralized winding structure such that said main winding and said sub winding are directly wound through neighboring slots or groups of adjacent neighboring slots and skip neighboring slots or groups of alternate neighboring slots, in an alternate manner, and wherein the rotor further comprises skews formed at a pitch identical to a pitch of the slots of the stator.