Simplified estimation of stator flux of induction motor for direct torque control using SPLINE

Andre D. Estefani; Raymundo Garcia; Moacyr Brito; Joao Onofre Pereira Pinto

doi:10.1109/INTERCON.2019.8853805

Simplified estimation of stator flux of induction motor for direct torque control using SPLINE

Andre D. Estefani, Raymundo Garcia, Moacyr Brito, Joao Onofre Pereira Pinto

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

Direct torque control (DTC) allows having a speed and torque control with good dynamic response. However, DTC uses a square root function to get the motor stator flux. This function is difficult to implement in microcontrollers or FPGAs. Hence, this paper proposes the use of SPLINE interpolation to implement the square root function with low computational cost, in order to get the magnitude of the stator flux. In SPLINE, the function is divided in intervals, and each interval is approximated using polynomial function. Besides, different discretization techniques to implement the integrator used in flux estimation will be tested in order to show their effects in flux and torque estimation. Simulations show that the proposed approach gives good estimations of torque and flux.

Original language	English
Title of host publication	Proceedings of the 2019 IEEE 26th International Conference on Electronics, Electrical Engineering and Computing, INTERCON 2019
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781728136462
DOIs	https://doi.org/10.1109/INTERCON.2019.8853805
State	Published - Aug 2019
Externally published	Yes
Event	26th IEEE International Conference on Electronics, Electrical Engineering and Computing, INTERCON 2019 - Lima, Peru Duration: Aug 12 2019 → Aug 14 2019

Publication series

Name	Proceedings of the 2019 IEEE 26th International Conference on Electronics, Electrical Engineering and Computing, INTERCON 2019

Conference

Conference	26th IEEE International Conference on Electronics, Electrical Engineering and Computing, INTERCON 2019
Country/Territory	Peru
City	Lima
Period	08/12/19 → 08/14/19

Funding

Authors want to thanks Federal University of Mato Grosso do SUL (UFMS) and its Graduation Program in Electrical Engineering for the support to this research.

Keywords

Direct Torque Control
Discrete time integrator
Flux estimation
SPLINE

Access to Document

10.1109/INTERCON.2019.8853805

Cite this

Estefani, A. D., Garcia, R., Brito, M., & Pinto, J. O. P. (2019). Simplified estimation of stator flux of induction motor for direct torque control using SPLINE. In Proceedings of the 2019 IEEE 26th International Conference on Electronics, Electrical Engineering and Computing, INTERCON 2019 Article 8853805 (Proceedings of the 2019 IEEE 26th International Conference on Electronics, Electrical Engineering and Computing, INTERCON 2019). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/INTERCON.2019.8853805

Estefani, Andre D. ; Garcia, Raymundo ; Brito, Moacyr et al. / Simplified estimation of stator flux of induction motor for direct torque control using SPLINE. Proceedings of the 2019 IEEE 26th International Conference on Electronics, Electrical Engineering and Computing, INTERCON 2019. Institute of Electrical and Electronics Engineers Inc., 2019. (Proceedings of the 2019 IEEE 26th International Conference on Electronics, Electrical Engineering and Computing, INTERCON 2019).

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title = "Simplified estimation of stator flux of induction motor for direct torque control using SPLINE",

abstract = "Direct torque control (DTC) allows having a speed and torque control with good dynamic response. However, DTC uses a square root function to get the motor stator flux. This function is difficult to implement in microcontrollers or FPGAs. Hence, this paper proposes the use of SPLINE interpolation to implement the square root function with low computational cost, in order to get the magnitude of the stator flux. In SPLINE, the function is divided in intervals, and each interval is approximated using polynomial function. Besides, different discretization techniques to implement the integrator used in flux estimation will be tested in order to show their effects in flux and torque estimation. Simulations show that the proposed approach gives good estimations of torque and flux.",

keywords = "Direct Torque Control, Discrete time integrator, Flux estimation, SPLINE",

author = "Estefani, {Andre D.} and Raymundo Garcia and Moacyr Brito and Pinto, {Joao Onofre Pereira}",

note = "Publisher Copyright: {\textcopyright} 2019 IEEE.; 26th IEEE International Conference on Electronics, Electrical Engineering and Computing, INTERCON 2019 ; Conference date: 12-08-2019 Through 14-08-2019",

year = "2019",

month = aug,

doi = "10.1109/INTERCON.2019.8853805",

language = "English",

series = "Proceedings of the 2019 IEEE 26th International Conference on Electronics, Electrical Engineering and Computing, INTERCON 2019",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

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Estefani, AD, Garcia, R, Brito, M & Pinto, JOP 2019, Simplified estimation of stator flux of induction motor for direct torque control using SPLINE. in Proceedings of the 2019 IEEE 26th International Conference on Electronics, Electrical Engineering and Computing, INTERCON 2019., 8853805, Proceedings of the 2019 IEEE 26th International Conference on Electronics, Electrical Engineering and Computing, INTERCON 2019, Institute of Electrical and Electronics Engineers Inc., 26th IEEE International Conference on Electronics, Electrical Engineering and Computing, INTERCON 2019, Lima, Peru, 08/12/19. https://doi.org/10.1109/INTERCON.2019.8853805

Simplified estimation of stator flux of induction motor for direct torque control using SPLINE. / Estefani, Andre D.; Garcia, Raymundo; Brito, Moacyr et al.
Proceedings of the 2019 IEEE 26th International Conference on Electronics, Electrical Engineering and Computing, INTERCON 2019. Institute of Electrical and Electronics Engineers Inc., 2019. 8853805 (Proceedings of the 2019 IEEE 26th International Conference on Electronics, Electrical Engineering and Computing, INTERCON 2019).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Simplified estimation of stator flux of induction motor for direct torque control using SPLINE

AU - Estefani, Andre D.

AU - Garcia, Raymundo

AU - Brito, Moacyr

AU - Pinto, Joao Onofre Pereira

PY - 2019/8

Y1 - 2019/8

N2 - Direct torque control (DTC) allows having a speed and torque control with good dynamic response. However, DTC uses a square root function to get the motor stator flux. This function is difficult to implement in microcontrollers or FPGAs. Hence, this paper proposes the use of SPLINE interpolation to implement the square root function with low computational cost, in order to get the magnitude of the stator flux. In SPLINE, the function is divided in intervals, and each interval is approximated using polynomial function. Besides, different discretization techniques to implement the integrator used in flux estimation will be tested in order to show their effects in flux and torque estimation. Simulations show that the proposed approach gives good estimations of torque and flux.

AB - Direct torque control (DTC) allows having a speed and torque control with good dynamic response. However, DTC uses a square root function to get the motor stator flux. This function is difficult to implement in microcontrollers or FPGAs. Hence, this paper proposes the use of SPLINE interpolation to implement the square root function with low computational cost, in order to get the magnitude of the stator flux. In SPLINE, the function is divided in intervals, and each interval is approximated using polynomial function. Besides, different discretization techniques to implement the integrator used in flux estimation will be tested in order to show their effects in flux and torque estimation. Simulations show that the proposed approach gives good estimations of torque and flux.

KW - Direct Torque Control

KW - Discrete time integrator

KW - Flux estimation

KW - SPLINE

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M3 - Conference contribution

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T3 - Proceedings of the 2019 IEEE 26th International Conference on Electronics, Electrical Engineering and Computing, INTERCON 2019

BT - Proceedings of the 2019 IEEE 26th International Conference on Electronics, Electrical Engineering and Computing, INTERCON 2019

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 26th IEEE International Conference on Electronics, Electrical Engineering and Computing, INTERCON 2019

Y2 - 12 August 2019 through 14 August 2019

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Estefani AD, Garcia R, Brito M, Pinto JOP. Simplified estimation of stator flux of induction motor for direct torque control using SPLINE. In Proceedings of the 2019 IEEE 26th International Conference on Electronics, Electrical Engineering and Computing, INTERCON 2019. Institute of Electrical and Electronics Engineers Inc. 2019. 8853805. (Proceedings of the 2019 IEEE 26th International Conference on Electronics, Electrical Engineering and Computing, INTERCON 2019). doi: 10.1109/INTERCON.2019.8853805

Simplified estimation of stator flux of induction motor for direct torque control using SPLINE

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