Four terminal hermetic bushing for use with single-phase...

Details Four terminal hermetic bushing for use with single-phase... Four terminal hermetic bushing for use with single-phase...

2008-03-04

2011-10-04

Jones, Melvin (Department: 3744)

Refrigeration

Refrigeration producer

Compressor-condenser-evaporator circuit

Reexamination Certificate

active

08028540

ABSTRACT:
A three-winding induction motor supplies shaft power to an air-conditioning or refrigeration compressor, where both motor and compressor are hermetically sealed, and the wall of the hermetic enclosure has an electrical bushing in the wall of the enclosure, which bushing has four electrical conductors to connect the motor stator windings internal in the enclosure to the external electrical circuits. Four conductors permit the six motor winding terminals for a three-winding induction motor to be connected in the unique semi-hexagon circuit to motor-run-capacitors and to a single-phase supply. A three-symmetrical-winding induction motor with the three windings in series and a single-phase supply connected across two of the windings in series. A circuit for use with a three-winding induction motor. A capacitor bank. An air-conditioning or refrigeration unit. A four-terminal hermetic bushing.

REFERENCES:
patent: 3133429 (1964-05-01), Griffin
patent: 6331925 (2001-12-01), Loprete et al.
patent: 7553136 (2009-06-01), Ku et al.

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