TY - CHAP

T1 - Inductance Estimation Using an EKF for the Robust Control of PMSMs in the Presence of Saturation

AU - Van Rossum, Felix M.

AU - Mercorelli, Paolo

AU - Haus, Benedikt

AU - Aschemann, Harald

N1 - Conference code: 28

PY - 2024/11/11

Y1 - 2024/11/11

N2 - A permanent magnet synchronous machine (PMSM) is considered in this paper in the presence of inductance saturation. The cascaded control structure consists of an inner and outer control loop. In the inner loop, a decoupling structure is implemented. Two sliding mode controls (SMCs) are employed to robustify the current decoupling control. The combination of a decoupling controller (DC) and a SMC allows to obtain not only a desired sliding dynamics inside non-interacting controlled invariants but simultaneously a desired reaching phase dynamics that is characterized by the external dynamics of the subspaces. The decoupling approach allows to obtain a straightforward dynamics to be controlled. The presence of saturation, however, requires the identification of the quadrature inductance Lq. Otherwise, due to the huge impact of the current iq on this inductance, the control performance would decline. An identification of this variable allows to adapt the control structure properly. The identification is realized using an extended Kalman filter (EKF), where the maximum torque per Ampere (MTPA), SMC and DC are adapted using the estimated Lq values. The reference currents for the SMC controllers are determined by an MTPA strategy for the outer control loop. Here, the reference torque is calculated by the combination of geometric control and SMC. A robust control strategy with respect to the parametric and dynamic uncertainties is obtained with the combination of SMC and EKF. Improvements in the performance of the controller are pointed out by dedicated computer simulations.

AB - A permanent magnet synchronous machine (PMSM) is considered in this paper in the presence of inductance saturation. The cascaded control structure consists of an inner and outer control loop. In the inner loop, a decoupling structure is implemented. Two sliding mode controls (SMCs) are employed to robustify the current decoupling control. The combination of a decoupling controller (DC) and a SMC allows to obtain not only a desired sliding dynamics inside non-interacting controlled invariants but simultaneously a desired reaching phase dynamics that is characterized by the external dynamics of the subspaces. The decoupling approach allows to obtain a straightforward dynamics to be controlled. The presence of saturation, however, requires the identification of the quadrature inductance Lq. Otherwise, due to the huge impact of the current iq on this inductance, the control performance would decline. An identification of this variable allows to adapt the control structure properly. The identification is realized using an extended Kalman filter (EKF), where the maximum torque per Ampere (MTPA), SMC and DC are adapted using the estimated Lq values. The reference currents for the SMC controllers are determined by an MTPA strategy for the outer control loop. Here, the reference torque is calculated by the combination of geometric control and SMC. A robust control strategy with respect to the parametric and dynamic uncertainties is obtained with the combination of SMC and EKF. Improvements in the performance of the controller are pointed out by dedicated computer simulations.

KW - extended Kalman filter

KW - invariant subspaces

KW - PMSMs

KW - sliding-mode control

KW - Engineering

UR - http://www.scopus.com/inward/record.url?scp=85211319185&partnerID=8YFLogxK

U2 - 10.1109/ICSTCC62912.2024.10744741

DO - 10.1109/ICSTCC62912.2024.10744741

M3 - Article in conference proceedings

AN - SCOPUS:85211319185

SN - 979-8-3503-6430-9

T3 - International Conference on System Theory, Control and Computing, ICSTCC - Proceedings

SP - 463

EP - 469

BT - 2024 28th International Conference on System Theory, Control and Computing (ICSTCC)

A2 - Barbulescu, Lucian-Florentin

PB - Institute of Electrical and Electronics Engineers Inc.

CY - Piscataway

T2 - 28th International Conference on System Theory, Control and Computing - ICSTCC 2024

Y2 - 10 October 2024 through 12 October 2024

ER -