Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1996-10-25
1998-02-17
Ip, Paul
Electricity: motive power systems
Induction motor systems
Primary circuit control
318805, 318807, 318798, H02P 540
Patent
active
057194823
ABSTRACT:
A process and device for field-oriented control of a polyphase machine, where a torque-producing quantity is regulated via a speed control circuit and a flux-producing quantity is regulated via a field control circuit that determines the magnitude and angle of the flux. The flux magnitude is injected through the field control circuit. Orientation errors in the field axis are corrected through frequency adjustment, specifically by adjusting the slip frequency according to the difference between the transformation angle used and the flux angle. The voltages and currents that create the rotational field of the machine are generated via a current control circuit in accordance with the corrected reference values.
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A.A. Ganji et al., "Rotor Time Constant Compensation of an Induction Motor in Indirect Vector Controlled Drives," EPE '95 Conf., Seville, Spain 1995, pp. 1.431-1.436.
Ip Paul
Siemens Aktiengesellschaft
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