A Novel Robust Sensorless Technique for Field-Oriented Control Drive of Permanent Magnet Synchronous Motor

That-Dong Ton,Po-Hsun Chen,Min-Fu Hsieh

doi:10.1109/access.2021.3097120

That-Dong Ton, Po-Hsun Chen + Show 1 more

Open Access

https://doi.org/10.1109/access.2021.3097120

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Abstract

This paper proposes a novel rotor position estimation technique based on stator flux linkage to implement robust sensorless field-oriented control for permanent magnet synchronous motor drives. The proposed method can accurately estimate rotor position by mitigating the dependence on quality of the magnitude and phase angle of the estimated stator flux linkage. A high-accuracy load angle calculation based on <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$d$ </tex-math></inline-formula> - <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$q$ </tex-math></inline-formula> -axis current estimation method is first developed for further rotor position determination. In the rotor position calculation, the reference flux linkage magnitude is used instead of the estimated one to avoid the influence of potential high noise levels during low speed operation. As a result, the rotor angle estimation depends only on the phase angle of stator flux linkage, without the effect of its magnitude. The estimation accuracy can thus be improved. Also, by employing a simple stator flux linkage phase lag compensator, the performance of the proposed sensorless method can be dramatically improved at low speed. Moreover, the problem of motor parameter variation (e.g., changes in winding resistance, stator inductances, and permanent magnetic flux linkage) has been analyzed and overcome. Finally, comparisons between conventional and proposed methods are presented with simulations and experiments to demonstrate the effectiveness and reliability of the proposed method.

Highlights

In recent decades, the ‘‘greener’’ industrial policies have been extensively considered in the rising global demand for electrical and electronic products
With the HIL device serving as a real-time test platform for the motor drive system [27], [28], the correctness and performance of the proposed SLC-fieldoriented control (FOC) control algorithms written in a micro control unit (MCU)
In this paper, a novel sensorless technique applied to the permanent magnet synchronous motor (PMSM) FOC drive based on stator flux linkage has been presented and evaluated

Summary

Introduction

The ‘‘greener’’ industrial policies have been extensively considered in the rising global demand for electrical and electronic products. As one such example, the permanent magnet synchronous motor (PMSM) is an outstanding candidate for variable-speed industrial drives due to its functional advantages, such as a wide constant power speed range, high efficiency, high power and torque density, and low maintenance [1]. The fieldoriented control (FOC) has been proven to be a typical technique for high-performance variable speed drives [1], which is suitable for most types of PMSMs. In the FOC scheme, The associate editor coordinating the review of this manuscript and approving it for publication was Kan Liu. the position information of the rotor is an indispensable requirement for both current and speed control loops. Some sensorless rotor position estimation algorithms have been developed to avoid these limitations [2]–[21]

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