An Extended Sliding Mode Observer for Speed, Position and Torque Sensorless Control for PMSM Drive Based Stator Resistance Estimator

Abstract

This paper presents a robust sixth-order Discrete-time Extended Sliding Mode Observer (DESMO) for sensorless control of PMSM in order to estimate the currents, speed, rotor position, load torque and stator resistance. The satisfying simulation results on Simulink/Matlab environment for a 1.6 kW PMSM demonstrate the good performance and stability of the proposed ESMO algorithm against parameter variation, modeling uncertainty, measurement and system noises.

Design of Full-Order State Observer for Motor Drive Systems Based on the Fixed Gain Filter

“…On this basis, the observations are compensated for the predictive functional controller, and the results prove the effectiveness of the algorithm in speed detection and interference suppression [28]. An adaptive Kalman observer for position, speed and load torque is proposed in [29] for PMSM servo system, which can effectively alleviate the problem of large speed error and time delay at low speed. In order to reduce the lateral dynamic impact caused by the mechanical backlash of the independently-driven dual-motor electric vehicle, KF is employed to design a dynamic smoothness controller in [30].…”

Adaptive Position Sensorless Control of PM Synchronous Motors-A State of Art

“…Being a 6th order observer, it requires high speed controller for cumbersome calculation and practical implementation. The conventional extended SMO can be modified by using three methodologies presented in [39]. In first technique, boundary layer variable thickness algorithm is used in saturation function, second technique proposed using back electromotive force (BEMF) observer and dead-time compensation is used in third technique proposed.…”

Exponential Stabilization and Estimation for Sampled Observer Design of Surface Mounted Permanent Magnet Synchronous Motor

“…The latter allow the control of stator phases switching action, depending on the electrical rotor position, so that the PMS motors operate with time-varying speed. The inverters are acted on using controllers, but these need online measurements of the rotor speed and load torque [1]. The point is that mechanical sensors are costly and may not be sufficiently reliable.…”

“…The electromagnetic torque, em T , is indirect measurable output state. This can be evaluated through the first term of third subsystem given in(1). One can write the system under study of SPMSM as:…”