Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1988-03-04
1991-05-21
Smith, Jr., David
Electricity: motive power systems
Induction motor systems
Primary circuit control
318803, H02P 540
Patent
active
050178555
ABSTRACT:
An AC motor drive using current control instead of the more usual voltage control. The instantaneous inverter phase currents are monitored by sensors 16, 17, 18 and used as feedback to enable the inverter phases to be switched so that each phase current conforms in frequency and amplitude to a phase reference sinusoid produced by a sine wave generator 6. The reference sinusoids are isolated from the feedback comparators 7, 8, 9 with the phase current sensors and comparators having a common reference potential to overcome problems inherent in isolating the sensors.
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Palaniappan et al, "A Control Strategy for Reference Wave Adaptive Current Generation", IEEE Transactions on Industrial Electronics and Control Instrumentation, vol. IEC1-27, No. 2, May 1980, pp. 92-96.
Byers David J.
Penny John R.
GEC (New Zealand) Limited
Smith Jr. David
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