Improved Rotor Position Estimation in Extended Back-EMF Based Sensorless PM Brushless AC Drives with Magnetic Saliency

Li, Y.; Zhu, Z. Q.; Howe, D.; Bingham, C.M.

doi:10.1109/iemdc.2007.383579

Cited by 23 publications

(14 citation statements)

References 7 publications

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“…In general, the position estimation error is comprised of a dc offset [15] and harmonic components when using the EMF model-based methods. To diminish the dc error resulting from the parameter uncertainties, the online parameter identification is required [16], [17].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Position Observer Using Second-Order Generalized Integrator for Sensorless Interior Permanent Magnet Synchronous Motor Drives

2014

IEEE Trans. Energy Convers.

108

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For the purpose of improving the performance of sensorless interior permanent magnet synchronous motor (IPMSM) drives, an enhanced electromotive-force (EMF)-based position observer adopting second-order generalized integrator (SOGI) to eliminate the harmonic error is proposed. The inverter nonlinearities and flux spatial harmonics that give rise to the harmonic error of position estimation are analyzed. A harmonic decoupling network consisting of multiple SOGIs based adaptive filters is adopted to achieve the multiple selective EMF harmonic elimination (MSEHE). The application of the frequency-locked loop ensures the SOGI resonance frequency adaptive, which is critical for the variable-speed operation in IPMSM drive applications. Using the SOGI-MSEHE in the position tracking estimator, the low-order harmonics in the estimated EMF can be effectively eliminated, contributing to cancelling the position estimation harmonic error. The effectiveness of the proposed enhanced position observer is verified by the experimental results at a 2.2-kW IPMSM sensorless drive.Index Terms-EMF harmonic, interior permanent magnet synchronous motor (IPMSM), inverter nonlinearities, position estimation error, second-order generalized integrator (SOGI), sensorless control.

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Section: Introductionmentioning

confidence: 99%

Enhanced Position Observer Using Second-Order Generalized Integrator for Sensorless Interior Permanent Magnet Synchronous Motor Drives

2014

IEEE Trans. Energy Convers.

108

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“…In order to realize sensorless operation of BLAC machines during the whole speed range, two different kinds of sensorless control schemes are normally combined together: fundamental model based and saliency-tracking based methods. The algorithms relying on the fundamental model consist of the back EMF based [1]- [3] and flux linkage based methods [4]. They have the advantages of straightforward and simplicity, and a good performance is shown in the mid-high speed region.…”

Section: Introductionmentioning

confidence: 99%

Robust initial rotor position estimation of permanent magnet brushless AC machines with carrier signal injection-based sensorless control

Zhu

2012

2012 IEEE Energy Conversion Congress and Exposition (ECCE)

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In sensorless control of permanent magnet brushless AC machines, it is necessary to identify the initial rotor position prior to start-up the machine. Although saliency tracking based sensorless techniques are proven to be a good candidate to estimate the initial rotor position in sensorless control, magnetic polarity identification is another important issue. Since the machine saliency undergoes two cycles in single electrical period, the estimated position information based on machine saliency has an angle ambiguity of π. With the aid of magnetic saturation effect, this paper proposes a robust initial rotor position estimation scheme, which utilizes both d-and q-axis carrier current, instead of only q-axis carrier current in conventional pulsating carrier signal injection based sensorless control algorithm. Finally, the experimental results confirm the effectiveness and robustness of the proposed method.Index Terms --Carrier signal injection, initial rotor position, permanent magnet machine, sensorless.

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“…It is obvious that the position and speed estimation errors are significantly lower than the observer with constant sliding-mode gains, when the IPMSM runs in low and high speed range. • after loading and this is due to the mismatch of parameters caused by the increase of current after loading [12,31]. Hence, the performance of the adaptive STO could be verified.…”

mentioning

confidence: 95%

Sensorless Control for IPMSM Based on Adaptive Super-Twisting Sliding-Mode Observer and Improved Phase-Locked Loop

Chen

Zhang

et al. 2019

Energies

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In traditional sensorless control of the interior permanent magnet synchronous motors(IPMSMs) for medium and high speed domains, a control strategy based on a sliding-mode observer(SMO) and phase-locked loop (PLL) is widely applied. A new strategy for IPMSM sensorless controlbased on an adaptive super-twisting sliding-mode observer and improved phase-locked loop isproposed in this paper. A super-twisting sliding-mode observer (STO) can eliminate the chatteringproblem without low-pass filters (LPFs), which is an effective method to obtain the estimated backelectromotive forces (EMFs). However, the constant sliding-mode gains in STO may causeinstability in the high speed domain and chattering in the low speed domain. The speed-relatedadaptive gains are proposed to achieve the accurate estimation of the observer in wide speed rangeand the corresponding stability is proved. When the speed of IPMSM is reversed, the traditionalPLL will lose its accuracy, resulting in a position estimation error of 180°. The improved PLL basedon a simple strategy for signal reconstruction of back EMF is proposed to ensure that the motor canrealize the direction switching of speed stably. The proposed strategy is verified by experimentaltesting with a 60-kW IPMSM sensorless drive.

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Improved Rotor Position Estimation in Extended Back-EMF Based Sensorless PM Brushless AC Drives with Magnetic Saliency

Cited by 23 publications

References 7 publications

Enhanced Position Observer Using Second-Order Generalized Integrator for Sensorless Interior Permanent Magnet Synchronous Motor Drives

Enhanced Position Observer Using Second-Order Generalized Integrator for Sensorless Interior Permanent Magnet Synchronous Motor Drives

Robust initial rotor position estimation of permanent magnet brushless AC machines with carrier signal injection-based sensorless control

Sensorless Control for IPMSM Based on Adaptive Super-Twisting Sliding-Mode Observer and Improved Phase-Locked Loop

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