Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1998-10-26
2000-10-24
Martin, David S.
Electricity: motive power systems
Induction motor systems
Primary circuit control
318807, 318809, 318811, H02P 534
Patent
active
061372587
ABSTRACT:
A system for speed-sensorless control of an induction machine includes a flux regulator & torque current calculator for operating the machine in a heavily saturated state to produce a saturation induced saliency; a saliency tracker for tracking an angle of the saturation-induced saliency; a signal injector for injecting an AC signal aligned with a saliency axis; voltage and current determiners for determining stator voltages and currents; and a rotor flux calculator for using the saturation-induced saliency angle, the determined stator voltages, and the determined stator currents to determine a magnitude and a location of a rotor flux vector. The flux regulator & torque current calculator is adapted to use the rotor flux vector to control the induction machine.
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PL Jansen, et al, "Transducerless Field Orientation Concepts Employing Saturation-Induced Saliencies in Induction Machines", 1995 IEEE, pp. 174-181.
F. Blaschke, et al, "Sensorless Direct Field Orientation at Zero Flux Frequency", IEEE-IAS Meeting, Oct. 1996, pp. 189-196.
PL Jansen, et al, "Transducerless Field Orientation Concepts Employing Saturation-Induced Saliencies in Induction Machines", IEEE Trans on Industry Applications, vol. 32, No. 6, Nov./Dec. 1996, pp. 1380-1393.
Y. Xue, et al, "A Stator Flux-Oriented Voltage Source Variable-Speed Drive Based on dc Link Measurement", IEEE Trans. on Ind. Appl. vol. 27, No. 5, Sep./Oct. 1991, pp. 962-969.
PL Jansen, et al, "Transducerless Position and Velocity Estimation In Induction and Salient AC Machines", IEEEE-TAS Annual Meeting, Denver, Oct. 1994, pp. 488-495.
Agosti Ann M.
Breedlove Jill M.
General Electric Company
Martin David S.
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