Sensorless Control of Synchronous Reluctance Motors Based on Extended EMF Models Considering Magnetic Saturation With Online Parameter Identification

Ichikawa, Shunsuke; Tomita, Mutuwo; Doki, Shinji; Okuma, Shigeru

doi:10.1109/tia.2006.880848

Cited by 116 publications

(45 citation statements)

References 29 publications

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“…In this paper, an extended electromotive force (EEMF) model (8) is used for design of current-controller. The EEMF circuit equations of IPMSM in d−q reference frame are given by (7).…”

Section: Stationary Reference Frame Model Of Ipmsmmentioning

confidence: 99%

Stationary Reference Frame Position Sensorless Control Based on Stator Flux Linkage and Sinusoidal Current Tracking Controller for IPMSM

et al. 2017

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Generally, standard direct torque control (DTC) does not require fine current responses from the current controller because the torque and flux of a DTC-based drive are controlled by a closed-loop system without current loops. It is often difficult for the standard DTC to achieve the desired current regulation and fine harmonic current disturbance suppression performancew. In order to overcome these problems, this paper proposes a new stationary reference frame position sensorless control system based on stator flux linkage estimation, and a new sinusoidal current tracking controller. In this paper, the current control performance of IPMSMs using the proposed sinusoidal current tracking controller is evaluated through numerical simulation and experiments. Finally, using the proposed sinusoidal current tracking controller, the effectiveness of the proposed stationary reference frame position sensorless control system with the stator flux control method is confirmed through experimental results.

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“…In this paper, an extended electromotive force (EEMF) model (8) is used for design of current-controller. The EEMF circuit equations of IPMSM in d−q reference frame are given by (7).…”

Section: Stationary Reference Frame Model Of Ipmsmmentioning

confidence: 99%

Stationary Reference Frame Position Sensorless Control Based on Stator Flux Linkage and Sinusoidal Current Tracking Controller for IPMSM

et al. 2017

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“…On the other hand, an additional rotor position estimator is required for the rotor reference frame model because the rotor position error (Δθ) is estimated instead of the rotor position (θ r r ω ). In addition, the third term in (13), ignored in (15), may generate a back-EMF estimation error in the transient-state condition, where the error between and r ω is no longer negligible.…”

Section: B Mathematical Model In the Rotor Reference Framementioning

confidence: 99%

“…The deviation of the motor parameters caused by magnetic saturation and thermal change also degrades the performance of back-EMF based sensorless drives. Online parameter identification is an alternative to motor parameter variations [12]- [13].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Back-EMF Estimators for Sensorless Control of Permanent Magnet Synchronous Motors

Lee¹,

Park²

2012

Journal of Power Electronics

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This paper presents a comparative study of position sensorless control schemes based on back-electromotive force (back-EMF) estimation in permanent magnet synchronous motors (PMSM). The characteristics of the estimated back-EMF signals are analyzed using various mathematical models of a PMSM. The transfer functions of the estimators, based on the extended EMF model in the rotor reference frame, are derived to show their similarity. They are then used for the analysis of the effects of both the motor parameter variations and the voltage errors due to inverter nonlinearity on the accuracy of the back-EMF estimation. The differences between a phase-locked-loop (PLL) type estimator and a Luenberger observer type estimator, generally used for extracting rotor speed and position information from estimated back-EMF signals, are also examined. An experimental study with a 250-W interior-permanent-magnet machine has been performed to validate the analyses.

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“…A look-up table (LUT) saving the d-q axes inductance values based on the d-q axes currents can be considered to compensate for the periodically varying inductances. However, in view of the effects of dynamic inductance [16], the static inductance-based LUT clearly cannot completely compensate for the effects of periodic magnetic saturation in a sensorless controlled PMSM drive.…”

Section: Introductionmentioning

confidence: 99%

Compensation of Periodic Magnetic Saturation Effects for the High-Speed Sensorless Control of PMSM Driven by Inverter Output Power Control-based PFC Strategy

Lee¹

2015

Journal of Power Electronics

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An inverter output power control based power factor correction (PFC) strategy is being extensively used for permanent magnet synchronous motor (PMSM) drives in appliances because such a strategy can considerably reduce the cost and size of the inverter. In this strategy, PFC circuits are removed and large electrolytic DC-link capacitors are replaced with small film capacitors. In this application, the PMSM d-q axes currents are controlled to produce ripples, the frequency of which is twice that of the AC main voltage, to obtain a high power factor at the AC mains. This process indicates that the PMSM operates under periodic magnetic saturation conditions. This paper proposes a back electromotive-force (back-EMF) estimator for the high-speed sensorless control of PMSM operating under periodic magnetic saturation conditions. The transfer function of the back-EMF estimator is analyzed to examine the effect of the periodic magnetic saturation on the accuracy of the estimated rotor position. A simple compensation method for the estimated position errors caused by the periodic magnetic saturation is also proposed in this paper. The effectiveness of the proposed method is experimentally verified with the use of a PMSM drive for a vacuum cleaner centrifugal fan, wherein the maximum operating speed reaches 30,000 rpm.

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Sensorless Control of Synchronous Reluctance Motors Based on Extended EMF Models Considering Magnetic Saturation With Online Parameter Identification

Cited by 116 publications

References 29 publications

Stationary Reference Frame Position Sensorless Control Based on Stator Flux Linkage and Sinusoidal Current Tracking Controller for IPMSM

Stationary Reference Frame Position Sensorless Control Based on Stator Flux Linkage and Sinusoidal Current Tracking Controller for IPMSM

Evaluation of Back-EMF Estimators for Sensorless Control of Permanent Magnet Synchronous Motors

Compensation of Periodic Magnetic Saturation Effects for the High-Speed Sensorless Control of PMSM Driven by Inverter Output Power Control-based PFC Strategy

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