Constant torque induction motor drive system

Details Constant torque induction motor drive system Constant torque induction motor drive system

1975-10-14

1977-08-09

Schaefer, Robert K.

Electricity: motive power systems

Motor-reversing

Armature or primary circuit control

318231, 318432, H02K 1702

Patent

active

040413616

ABSTRACT:
An ac induction motor is supplied with variable frequency and amplitude excitation voltage by a power converter. Precise regulation of torque independent of motor parameter changes is achieved by feedback control loops for maintaining at command values constant airgap flux and also the real component of stator current with respect to airgap voltage as measured by a voltage sensor. The real stator current error controls the slip frequency which adjusts to maintain constant airgap power.

REFERENCES:
patent: 3593083 (1971-07-01), Blaschke
patent: 3909687 (1975-09-01), Abbondanti

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