Electric Motors Codexery

Field-oriented control

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Field-oriented control (FOC) is a variable-frequency drive method that separates stator currents into two orthogonal components for independent control.[1] The magnetic flux of the motor is regulated by one component, and torque is regulated by the other.[1] From the flux and torque references supplied by the speed control, the drive's control system computes the corresponding current component references.[1]

Key facts and history

K. Hasse and F. Blaschke pioneered vector control of AC motors starting in 1968 and in the early 1970s.[2] General purpose AC drives only became available after microprocessor commercialization in the early 1980s.[3] The Park transformation, first conceptualized in a 1929 paper by Robert H. Park, is essential for understanding FOC.[4] Park's transformation converts machine differential equations from time-varying coefficients to time-invariant coefficients.[5]

IFOC is more commonly used because it operates from zero speed to high-speed field-weakening.[6] Werner Leonhard of Technical University Braunschweig advanced FOC techniques, which played a key role in making AC drives a viable competitor to DC drives.[2] Two categories of vector control exist: direct or feedback vector control (DFOC) and indirect or feedforward vector control (IFOC).[6] For AC drives, sensorless control is appealing due to factors of cost and reliability.[7]

What the cited sources add

Academic Press published "Power Electronics And Motor Drives" in 2006, which Wikipedia uses to describe vector control methods and the impact of microprocessor technology.[8][2][9][6][10]

References

  1. Wikipedia, "Field-oriented control" (CC BY-SA 4.0), which cites: Zambada, "Field-oriented control for motors", MachineDesign.com, Nov 8, 2007 (original not read by us) en.wikipedia.org
  2. Wikipedia, "Field-oriented control" (CC BY-SA 4.0), which cites: Yano, "History of Power Electronics for Motor Drives in Japan", p. 6, Fig 13; Rafiq, "Fast Speed Response Field-Orientation Control of Induction Motor Drive with Adaptive Neural Integator", Istanbul University Journal of Electrical & Electronics Engineering, 2006, p. 229; Drury, "The Control Techniques Drives and Controls Handbook", Institution of Engineering and Technology, 2009, p. xxx; Bose, "Power Electronics and Motor Drives : Advances and Trends", Academic, 2006, p. 22 (we also read that source) en.wikipedia.org
  3. Wikipedia, "Field-oriented control" (CC BY-SA 4.0), which cites: "The Development of Vector Control Drive"; Bose (2006), p. 605; Gabriel, "Field Oriented Control of Standard AC Motors Using Microprocessors", IEEE Transactions on Industry Applications, March–April 1980, p. 188 (original not read by us) en.wikipedia.org
  4. Wikipedia, "Field-oriented control" (CC BY-SA 4.0), which cites: Park, "Two-reaction theory of synchronous machines generalized method of analysis-part I", Transactions of the American Institute of Electrical Engineers, 1929, p. 716–730 (original not read by us) en.wikipedia.org
  5. Wikipedia, "Field-oriented control" (CC BY-SA 4.0), which cites: Heydt, "High Impact Papers in Power Engineering, 1900-1999", North American Power Symposium (NAPS) 2000, Oct 23–24, 2000, p. P-1 to P-7 (original not read by us) en.wikipedia.org
  6. Wikipedia, "Field-oriented control" (CC BY-SA 4.0), which cites: Bose (2006), pp. 419, 474 (original not read by us) en.wikipedia.org
  7. Wikipedia, "Field-oriented control" (CC BY-SA 4.0), which cites: Holtz, "Sensorless control of induction motor drives", Proceedings of the IEEE, Aug 2002, p. 1359–1394; Zambada, "The Benefits of FOC Sensorless Motor Control", Appliance Magazine (original not read by us) en.wikipedia.org
  8. Open Library record, ISBN 9780120884056 ("Power Electronics And Motor Drives"). CC0 (metadata); book content not read. openlibrary.org
  9. Wikipedia, "Field-oriented control" (CC BY-SA 4.0), which cites: Sinha, "Microprocessor-based control systems", D. Reidel Publishing, 1986, p. 161 & 175; Bose (2006), p. 474 (we also read that source) en.wikipedia.org
  10. Wikipedia, "Field-oriented control" (CC BY-SA 4.0), which cites: Bose (2006), p. 423-425; Dong, "Sensorless and Efficiency Optimized Induction Machine Control with Associated Converter PWM Modulation Schemes", Tennessee Technological University, July 2025, p. 10 (original not read by us) en.wikipedia.org

Each numbered sentence above was checked against the source it cites before publication. Sentences citing Wikipedia adapt text from the English Wikipedia article Field-oriented control (contributors), used under CC BY-SA 4.0; this entry is available under the same licence. Other sources were used for facts only; no text or images are copied from them.

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Sources

Compiled from Wikipedia and the sources listed below. Text from Wikipedia is available under CC BY-SA 4.0; this entry is adapted from it.

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