Initial Rotor Position Detection for Permanent Magnet Synchronous Motor Based on High-Frequency Voltage Injection without Filter

Wang, Zhiqiang Wang; Yao, Bo Yao; Guo, Liyan; Jin, Xuefeng; Li, Xinmin Li; Wang, Huimin Wang

doi:10.3390/wevj11040071

Cited by 14 publications

(12 citation statements)

References 23 publications

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“…An important part of the sensorless control methods is the zero-speed or initial position detection, which is usually performed over two steps. First, the inductance-based saliency tracker searches for the +d/−d axis, then another method detects the polarity of the rotor magnets [12,22,23]. Both steps require high-frequency models which are often derived from the corresponding fundamental frequency models [11].…”

Section: Initial Rotor Position Detection Methodsmentioning

confidence: 99%

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Permanent Magnet Synchronous Motor Model Extension for High-Frequency Signal Injection-Based Sensorless Magnet Polarity Detection

et al. 2022

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In this paper, a novel extended permanent magnet synchronous motor model is presented that incorporates a quadratic flux-current function to represent the polarity-dependent saliency. The proposed model enables the design of sensorless polarity detection algorithms required by the initial position detection of permanent magnet synchronous motors. The novelty of the model is that it integrates the polarity-dependent saliency into the traditional machine model and introduces a new machine parameter, the polarity-dependent saliency coefficient, to specify the Hessian matrix of the flux-current function. A measurement method is presented for determination of the elements of the Hessian and the polarity-dependent saliency coefficient. The solution of the model is given for high-frequency sinusoidal pulsating voltage injection. Experimental results show that the proposed extended model accurately predicts the amplitudes and phases of the second harmonics of the motor currents, which are the carriers of the polarity-dependent information. This information enables a current measurement-based polarity detection algorithm using the phase difference between the fundamental and second harmonic of the apparent d-axis current. Both the presented measurement data and the proposed model show that injection in the d-direction is optimal for polarity detection.

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Section: Initial Rotor Position Detection Methodsmentioning

confidence: 99%

“…The second spatial harmonics consist of two periods during an electrical revolution, hence inductance-based anisotropy tracking always yields an ambiguity of 180°in electrical angle and the linearized flux model ( 6) is unsuitable for polarity detection [23,39].…”

Section: Linearized Flux-linkage Functionmentioning

confidence: 99%

Permanent Magnet Synchronous Motor Model Extension for High-Frequency Signal Injection-Based Sensorless Magnet Polarity Detection

et al. 2022

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“…The zero-speed or initial position detection is performed over two steps by many methods. First, the inductance-based saliency tracker searches for the +d/−d axis, then another method detects magnet polarity [12], [28], [29]. Both steps require high-frequency models which are often derived from the corresponding fundamental frequency models [11].…”

Section: B Initial Position Detection Methodsmentioning

confidence: 99%

Saliency Model Extension for Sensorless Initial Position and Polarity Detection of Permanent Magnet Synchronous Motors

Szalay¹,

Fodor

Enisz

et al. 2021

IEEE Access

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In this paper, we propose an extended permanent magnet synchronous motor model that incorporates a quadratic flux-current function to determine the polarity-dependent saliency and develop a sensorless initial position detection method that is capable of polarity detection. The quadratic model extension is based on the second-order Taylor polynomial of the flux-current function. We present the model equations in both the stator-and the rotor-oriented reference frames as well as the Park and inverse Park transforms of the quadratic terms and Hessian matrices. The transient behavior and the dependency of the extended model on the rotor position have been validated. The proposed initial position detection method injects non-modulated even square wave voltage signals and relies only on phase-current measurements. We analyzed the effect of the pulse length on the errors of the position estimation and polarity detection. We provide machine parameter-based approximations of the current components dependent on the rotor position and, based on them, present a quantitative pulse-length design method.

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“…However, the lower energy product of ferrite PM has been seemed like a critical disadvantage to result in larger dimension [14]. In this design, the best performance of motor can be achieved by choosing neodymiumiron-boron (NdFeB35) based permanent magnets because they have high remanence and relatively larger coercive force compared to other PM [23].…”

Section: Ipmsm Rotor Topology and Designmentioning

confidence: 99%

Performance Analysis of Low Power Interior PMSM with different magnet Topology in Rotor Using FEM

Naik

Bag

Chandrasekaran

2022

Preprint

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Study and performances analysis of magnet design on rotor surface of permanent magnet synchronous machine (PMSM) based on finite element method (FEM) is presented. Three-phase PMSM has been investigated and numerical simulation performed using FEM with the aid of ANSYS Maxwell 2018.1 software. This research presents the positional variation of permanent magnets and their effects on the performance of the three-phase PMSM. The FEM is used as a technique for simulation besides the possibility of dealing with nonlinear equations. The PMSM involves a complex electromagnetic reaction, the authors used the ANSYS program to analyze and represent the performance of the motor under variable conditions. The case studied in this proposal is for three phases 220V, 50Hz, 0.55kW PMSM. Five rotor topologies namely, (i) spoke/tangential, (ii) saturable bridge/ U-shape (iii) V-shape (iv) radial, and (v) segmented bridge permanent magnet (PM) rotor is considered in the study. The aim of this research is to investigate the effect of a variety of rotor designs with different positions of magnets on efficiency, phase current, air gap magnetic flux density, and torque of PMSM. The ANSYS software has been used to model and simulate all topologies considered. In addition to the overall efficiency at steady state, electromagnetic and mechanical parameters are evaluated for each topology and comparative results are reported. The developed 2-D model shows the magnetic field distribution and performance of operational parameters under transient and steady-state conditions. The rotor shape with the smallest magnet volume is highly affecting the torque, magnetic flux, efficiency, and torque ripple. Radial force distribution with demagnetization of PM is also studied and results are reported. The obtained results show that significant changes in motor performance because of variation of PM design.

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Initial Rotor Position Detection for Permanent Magnet Synchronous Motor Based on High-Frequency Voltage Injection without Filter

Cited by 14 publications

References 23 publications

Permanent Magnet Synchronous Motor Model Extension for High-Frequency Signal Injection-Based Sensorless Magnet Polarity Detection

Permanent Magnet Synchronous Motor Model Extension for High-Frequency Signal Injection-Based Sensorless Magnet Polarity Detection

Saliency Model Extension for Sensorless Initial Position and Polarity Detection of Permanent Magnet Synchronous Motors

Performance Analysis of Low Power Interior PMSM with different magnet Topology in Rotor Using FEM

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