Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1997-11-21
1999-03-02
Shoop, Jr., William M.
Electricity: motive power systems
Induction motor systems
Primary circuit control
318685, 318696, 318798, H02P 528
Patent
active
058776087
ABSTRACT:
In a multiphase motor driver, each phase current is controlled by the ratio of measurements across a common sense element. By utilizing the same sense element for each phase, inaccuracies which result from the variance among multiple sense elements can be eliminated. The individual phase currents are controlled from a common clock generation device. By appropriately controlling each of the phase currents to assure that only one of the phase currents is flowing through the sense element at the time of measurement, the measurement is assured to be dependent on the individual current and the parametric value of the sense element only. Thereby, the control of the phase currents, via the ratio of the measured values across the common sense element, is independent of the parametric value of this common sense element.
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"Stepper Motor Basics", Industrial Circuits Data Book and Stepper Motor Control Handbook, Erricsson Components AB 1995, Publication No. IC2 (95015)A-Ue, Ericsson Components AB, S-164 81 Kista-Stockholm, Sweden.
"Drive Circuit Basics"Industrial Circuits Data Book and Stepper Motor Control Handbook, Erricsson Components AB 1995, Publication No. IC2 (95015)A-Ue, Ericsson Components AB, S-164 81 Kista-Stockholm, Sweden.
"Synchronization of Single-channel Stepper Motor Drivers Reduces Noise and Interference" Industrial Circuits Data Book and Stepper Motor Handbook, Erricsson Components AB 1995, Publication No. IC2 (95015)A-Ue, Ericsson Components AB, S-164 81 Kista-Stockholm, Sweden.
Franzblau Bernard
Leykin Rita
Philips Electronics North America Corporation
Shoop Jr. William M.
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