Reversible variable-speed 2-phase electric motor

Details Reversible variable-speed 2-phase electric motor Reversible variable-speed 2-phase electric motor

1984-12-19

1988-09-27

Smith, Jr., David

Electricity: motive power systems

Induction motor systems

Reversing

318808, A02P 540

Patent

active

047744480

ABSTRACT:
A reversible variable-speed two-phase motor is disclosed. The motor comprises two sets of stator coils of equal impedance displaced in space by 90 degrees and transistor inverters to provide exciting current to the stator coils. The current supplied to one of the sets of stator coils is 90 degrees out of phase with the current supplied to the other set of stator coils, and the direction of the current in each set of stator coils reverses every 180 degrees so that a smoothly rotating magnetic field is produced. The motor can be operated as an induction motor or as a synchronous motor or as a direct current brake.

REFERENCES:
patent: 2821639 (1958-01-01), Bright et al.
patent: 3025445 (1962-03-01), Welch
patent: 3042847 (1962-07-01), Welch
patent: 3105180 (1963-09-01), Burnett
patent: 3700987 (1972-10-01), Deering
patent: 3824440 (1974-07-01), McIntosh
patent: 3893012 (1975-07-01), Lin
patent: 4006391 (1977-01-01), Deering et al.
patent: 4454454 (1984-06-01), Valentine

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