Recommended Citation
Neira-Garcia, Jorge; Beltran-Pulido, Andres; and Cortes-Romero, John, "Algebraic Speed Estimation for Sensorless Induction Motor Control: Insights from an Electric Vehicle Drive Cycle" (2024). Purdue University Libraries Open Access Publishing Fund. Paper 227.
http://dx.doi.org/10.3390/electronics13101937
DOI
10.3390/electronics13101937
Date of this Version
5-15-2024
Keywords
algebraic state estimation, electric vehicles, induction motors, rotor speed estimation, sensorless control
Abstract
Induction motors (IMs) must meet high reliability and safety standards in mission-critical applications, such as electric vehicles (EVs), where sensorless control strategies are fundamental. However, sensorless rotor speed estimation demands improvements to overcome filtering distortions, tuning complexities, and sensitivity to IM model mismatch. Algebraic methods offer inherent filtering capabilities and design flexibility to address these challenges without introducing additional dynamics into the control system. The objective of this paper is to provide an algebraic estimation strategy that yields an accurate rotor speed estimate for sensorless IM control. The strategy includes an algebraic estimator with single-parameter tuning and inherent filtering action. We propose an EV case study to experimentally evaluate and compare its performance with a typical drive cycle and a dynamic torque load that emulates a small-scale EV power train. The algebraic estimator exhibited a signal-to-noise ratio (SNR) of 43 dB. The closed-loop experiment for the EV case study showed average tracking errors below 1 rad/s and similar performance compared to a well-known sensorless strategy. Our results show that the proposed algebraic estimation strategy works effectively in a nominal speed range for a practical IM sensorless application. The algebraic estimator only requires single-parameter tuning and potentially facilitates IM model updates using a resetting scheme.
Comments
This is the publisher PDF of Neira-García, J., Beltrán-Pulido, A., & Cortés-Romero, J. (2024). Algebraic Speed Estimation for Sensorless Induction Motor Control: Insights from an Electric Vehicle Drive Cycle. Electronics, 13(10), 1937. This article is distributed under a CC-BY license, and is available at DOI: 10.3390/electronics13101937.