Circuit and a method for processing amplitude and phase variable

Details Circuit and a method for processing amplitude and phase variable Circuit and a method for processing amplitude and phase variable

1983-03-18

1984-12-18

Goldberg, E. A.

Electricity: motive power systems

Induction motor systems

Primary circuit control

318801, H02P 140

Patent

active

044892667

ABSTRACT:
This invention relates to a circuit and to a method for processing amplitude and phase variable multiphase signals, which are required as current or voltage reference to drive electric motors, comprising a synchro-resolver angular position transducer, rigidly connected with a synchronous motor with the same polar configuration and number of poles thereof, according to which the analog signals detected by said transducer are modulated, demodulated and outputted out of phase by 90.degree. with the signals relating to the rotating magnetic field. The circuit moreover comprises a phase shifter device and means for modifying the amplitude of signals out-putted by said transducer as a function of at least one control signal. The resultant of the signals processed by said means is supplied to an amplifier to generate in the stator currents of determined amplitude and phases for driving said motor complying with the magnetic laws thereof.

REFERENCES:
patent: 3551766 (1967-03-01), Stemmler
patent: 3588645 (1968-07-01), Gilmore
patent: 4085355 (1976-04-01), Fradella
patent: 4158801 (1979-06-01), Hirata
patent: 4259628 (1981-03-01), Iwakane et al.
patent: 4358726 (1982-11-01), Iwakane et al.
patent: 4382217 (1983-05-01), Horner et al.

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