Single-phase induction motor

Details Single-phase induction motor Single-phase induction motor

2007-07-03

2007-07-03

Masih, Karen (Department: 2837)

Electricity: motive power systems

Induction motor systems

Primary circuit control

C318S793000, C318S772000, C318S786000, C318S774000, C318S767000

Reexamination Certificate

active

11202161

ABSTRACT:
A single-phase induction motor includes a main winding, an auxiliary winding, a run capacitor, and a subsidiary start device. The auxiliary winding is configured such that the number of turns of the auxiliary winding, through which a current flows, varies according to the operating mode of the motor. When the motor starts, the number of turns of the auxiliary winding, through which a current flows, is reduced, thereby increasing the start efficiency of the motor. When the motor runs in normal mode, the number of turns of the auxiliary winding, through which a current flows, is increased, thereby increasing the operational efficiency of the motor.

REFERENCES:
patent: 3303402 (1967-02-01), Martin et al.
patent: 3809937 (1974-05-01), Koike
patent: 4107583 (1978-08-01), Houtman
patent: 4119894 (1978-10-01), Sorensen
patent: 4322665 (1982-03-01), Landgraf
patent: 4387330 (1983-06-01), Zigler
patent: 4388581 (1983-06-01), Bhatnagar
patent: 2003/0107286 (2003-06-01), Machado et al.
patent: 2005/0253549 (2005-11-01), Min et al.
patent: 0412201 (1991-02-01), None
patent: 1-268468 (1989-10-01), None
patent: 2003-189564 (2003-07-01), None
patent: 20-1994-0018115 (1994-07-01), None
English Language Abstract of EP 0412201.
English Language Abstract of JP 2003-189564.
English Language Abstract of JP 1-268468.

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