A Novel Sliding Mode Observer-based Sensorless PMSM Control

Wu, Hang; Wu, Jianhua; Sun, Qingguo; Zhang, Le

doi:10.1109/icems.2019.8922356

Cited by 5 publications

(9 citation statements)

References 5 publications

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“…Lyapunov based techniques are also addressed in [36] with reference to the problem of estimation of rotor angular position. Sliding-mode observers for the same problem have been proposed in [37,38].…”

Section: State-of-art On Cogging Torque Reductionmentioning

confidence: 99%

Design of an Observer-Based Architecture and Non-Linear Control Algorithm for Cogging Torque Reduction in Synchronous Motors

Dini

Saponara

2020

Energies

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The problem of cogging torque is due to a magnetic behavior, intrinsic to synchronous machines and due to the presence of permanent magnets themselves. Cogging torque is a significant problem when the servo drive is used for applications where high precision in terms of position control is required. In this paper we present a method of cogging torque reduction by means of a control technique based on mathematical modeling of the cogging phenomenon itself in order to exploit this knowledge directly in the controller design. The mathematical model is inserted in the dynamic model of the synchronous machine in order to exploit the feedback linearization, providing an expression of the control law in which the contribution of the deterministic knowledge of the phenomenon is directly present. The cogging phenomenon physically depends on the angular position of the rotor, as well as the deterministic model we use to define the control vector. This makes it interesting and innovative to determine whether the control algorithm can be inserted within a sensor-less architecture, where rotor position and angular velocity measurements are not available. For this purpose, we present the use of an extended Kalman filter (EKF) in the continuous-time domain, discussing the advantages of an observer design based on a dynamic motor model in three-phase and direct-square axes. Results are presented through very accurate simulation for a trajectory-tracking problem, completing with variational analysis in terms of variation of initial conditions between EKF and motor dynamics, and in terms of parametric variation to verify the robustness of the proposed algorithm. Moreover, a computational analysis based on Simulink Profiler is proposed, which provides some indication for possible implementation on an embedded platform.

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Section: State-of-art On Cogging Torque Reductionmentioning

confidence: 99%

Design of an Observer-Based Architecture and Non-Linear Control Algorithm for Cogging Torque Reduction in Synchronous Motors

Dini

Saponara

2020

Energies

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“…Wu et al [23] proposed a stable SMO which uses a new saturated state control (SSC) function instead of the sign function to reduce the chattering phenomenon and steady-state errors, but the simulation and experimental waveforms produced from this method are less defined, which is not convincing.…”

Section: Introductionmentioning

confidence: 99%

Research on an Improved Sliding Mode Sensorless Six-Phase PMSM Control Strategy Based on ESO

et al. 2021

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The six-phase motor control system has low torque ripple, low harmonic content, and high reliability; therefore, it is suitable for electric vehicles, aerospace, and other applications requiring high power output and reliability. This study presents a superior sensorless control system for a six-phase permanent magnet synchronous motor (PMSM). The mathematical model of a PMSM in a stationary coordinate system is presented. The information of motor speed and position is obtained by using a sliding mode observer (SMO). As torque ripple and harmonic components affect the back electromotive force (BEMF) estimated value through the traditional SMO, the function of the frequency-variable tracker of the stator current (FVTSC) is used instead of the traditional switching function. By improving the SMO method, the BEMF is estimated independently, and its precision is maintained under startup or variable-speed states. In order to improve the estimation accuracy and resistance ability of the observer, the rotor position error was taken as the disturbance term, and the third-order extended state observer (ESO) was constructed to estimate the rotational speed and rotor position through the motor mechanical motion equation. Finally, the effectiveness of the method is verified by simulation and experiment results. The proposed control strategy can effectively improve the dynamic and static performance of PMSM.

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“…The magnitude of the electromotive force (EMF) presents an essential research subject in the field of electrical engineering, mostly in the development of high throughput techniques, solar energy, photo-catalysis, high temperature systems and solid-state electrolytes [1]. There are several works which are based on EMF calculation, in particular in the field of electrical machines for diagnosis [2], optimization [3], control [4] and measurements (speed torque) [5]. Furthermore, EMF plays a very important role in the field of electrical engineering and it is one of the electromagnetic quantities for which various special sensors have been manufactured.…”

Section: Introductionmentioning

confidence: 99%

“…In this way, an alternative arrangement of permanent magnets with a constant rotation speed is needed for sinusoidal waveform heating. These arrangements were generally inspired by linear Halbach configurations [4,13,[15][16][17][18][19]. Cylindrical Halbach arrays are emerging as competitive magnet structures for permanent magnet type eddy current heating.…”

Section: Introductionmentioning

confidence: 99%

Metrology and Measurement Systems

Bouakacha,

Ouili,

Allag

et al. 2021

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In this work, the electromotive force (EMF) near a permanent magnet heating cylinder was determined using a practical test bench. The aim is to elaborate three-dimensional analytical calculation capable of predicting accurately the same electromagnetic quantities by calculating the induced EMF in the presence of an inductive sensor. The analytical approach is obtained from developing mathematical integrals using the Coulombian approach to permanent magnets. In this approach, rotations are considered by Euler's transformations matrices permitting the calculation of all permanent magnets flux densities contributions at the same points in the surrounding free space. These points, part of a uniform rectangular grid of the active EMF sensor surface, are used to compute the EMF by Faraday's law. The validation results between experimental and simulated ones confirm the robustness and the efficiency of the proposed analytical approach.

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A Novel Sliding Mode Observer-based Sensorless PMSM Control

Cited by 5 publications

References 5 publications

Design of an Observer-Based Architecture and Non-Linear Control Algorithm for Cogging Torque Reduction in Synchronous Motors

Design of an Observer-Based Architecture and Non-Linear Control Algorithm for Cogging Torque Reduction in Synchronous Motors

Research on an Improved Sliding Mode Sensorless Six-Phase PMSM Control Strategy Based on ESO

Metrology and Measurement Systems

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