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
N1 - Publisher Copyright:
© 2019 IEEE.
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
UR - http://www.scopus.com/inward/record.url?scp=85073556578&partnerID=8YFLogxK
U2 - 10.1109/INTERCON.2019.8853805
DO - 10.1109/INTERCON.2019.8853805
M3 - Conference contribution
AN - SCOPUS:85073556578
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
ER -