Induction motor controller with rapid torque response

Details Induction motor controller with rapid torque response Induction motor controller with rapid torque response

1980-03-24

1982-09-07

Smith, Jr., David

Electricity: motive power systems

Induction motor systems

Primary circuit control

318809, 318811, H02P 540

Patent

active

043486274

ABSTRACT:
A control system for an induction machine. The system includes a multiphase variable frequency oscillator adapted to provide at least one pair of signals having frequencies proportional to the sum of a desired slip frequency and the frequency of rotation of the induction motor shaft, where the signals are in phase quadrature. A weighting network amplitude-scales one of each pair of signals by a factor related to the desired slip frequency. A summing network then generates an excitation signal for each stator winding by summing the amplitude-scaled signal and its associated quadrature signal corresponding to that stator winding.

REFERENCES:
patent: 3671831 (1972-06-01), Chausse et al.
patent: 3694718 (1972-09-01), Graf et al.
patent: 3700986 (1972-10-01), Cushman et al.
patent: 3796935 (1974-03-01), Blaschke
patent: 3805135 (1974-04-01), Blaschke
patent: 3824437 (1974-07-01), Blaschke
patent: 4008421 (1977-02-01), Bird et al.
patent: 4259628 (1981-03-01), Iwakane et al.
MacDonald, M. L. et al., "Control Loop of Induction Motor Drives Using DQ Model", IEEE IAS 1978 Annual Meeting Conference Record, pp. 897-903.
Nabe, A., "An Approach to Flux Control of Induction Motors Operated with Variable Frequency Power Supply", IEEE IAS 1979 Annual Meeting Conference Record, pp. 890-896.

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