Sensorless flux-weakening control of permanent magnet brushless machines using third-harmonic back-EMF

Shen, Jian‐Xin; Zhu, Z. Q.; Howe, D.

doi:10.1109/iemdc.2003.1210397

Cited by 34 publications

(42 citation statements)

References 13 publications

(20 reference statements)

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“…where t d is the time interval of the previous two zerocrossings of sn [5,6]. (4) is actually the average speed between the last two zero-crossings of sn but not the instantaneous speed during the rotor position estimation.…”

Section: Rotor Position Estimator Based On Integrationmentioning

confidence: 99%

“…Several sensorless control technologies based on third harmonic back-EMF have been proposed recently [5][6][7][8][9][10][11][12][13]. Shen in [5,6] presented the application for flux-weakening and ultrahigh speed sensorless control.…”

Section: Introductionmentioning

confidence: 99%

“…Shen in [5,6] presented the application for flux-weakening and ultrahigh speed sensorless control. In [8], the third harmonic back-EMF was applied on a reluctance machine and can successfully synchronously start from zero speed.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of Stator Current and Machine Saliency on Sensorless Control Performance Based on Third-Harmonic Back-EMF

Liu

Zhu

2014

7th IET International Conference on Power Electronics, Machines and Drives (PEMD 2014)

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This paper investigates the influence of stator current and machine saliency on rotor position estimation of permanent magnet synchronous machine (PMSM) based on third harmonic back-EMF which is contained in windings irrespective of the operational mode and parameters. Due to machine saliency and saturation of air gap flux-linkage, the amplitude and phase angle of third harmonic back-EMF will be affected by the stator current. Several experimental analyses are carried out based on a dSPACE platform with a laboratory PMSM validate that the machine speed and q-axis current will not affect the phase angle of the third harmonic back-EMF, whereas there will exhibit rotor position estimation error by applying negative d-axis current, and with large positive d-axis current, the third harmonic back-EMF will be seriously distorted due to critical air gap saturation.

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Section: Rotor Position Estimator Based On Integrationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of Stator Current and Machine Saliency on Sensorless Control Performance Based on Third-Harmonic Back-EMF

Liu

Zhu

2014

7th IET International Conference on Power Electronics, Machines and Drives (PEMD 2014)

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“…So the third harmonic based sensorless control is proposed for high speed operation. It should be pointed out that the third harmonic back-EMF has been used in sensorless control by detecting the zero crossing with a voltage comparator [4], [5]. Or by integrating the EMF and using a phaselocked loop (PLL) to keep the integration result being zero [3].Some preliminary results of this technique were reported in early paper.…”

Section: Introductionmentioning

confidence: 96%

Anew scheme sensorless control of BLDC motor using software PLL and third harmonic back-emf

Faeq

Ishak

2009

2009 IEEE Symposium on Industrial Electronics &Amp; Applications

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High performance sensorless permanent magnet brushless DC motor operation requires proper and precise commutation sequence. In general, the average torque falls rapidly as the rotor speed increases above the base speed, hence the motor will frequently be found to have insufficient torque at higher speed. One way to counter this problem is by using third harmonic back-emf detection technique during high speed operation because the third harmonic is usually kept a constant relationship with rotor position for any motor speeds and load conditions. Therefore, we could potentially avoid the torque deterioration which commonly occurs in traditional sensorless technique due to the delay of the phase angle between current and back-emf. Furthermore this method is practically free of noise which may be introduced from inverter switches. In this work, we propose a new software scheme of phase-locked loop (PLL) of third harmonic back-emf detection in order to accomplish a precise switching strategy for improving torque produced during high speed operation.Keyword-brushless direct current (BLDC) motor, sensorless control, third harmonic back electromotive force (EMF), phase-locked loop(PLL).

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“…Wide and qualified is the bibliography of the solutions proposed for the evaluation of speed and position from back-EMF measurement or estimation, still in recent times, [3] [5].…”

Section: Introductionmentioning

confidence: 99%

Design issues and estimation errors analysis of back-EMF based position and speed observer for SPM synchronous motors

Bolognani

Calligaro

Petrella

2011

2011 Symposium on Sensorless Control for Electrical Drives

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A back-electromotive force (back-EMF) based sensorless technique for surface-mounted permanent magnet synchronous motor (SPMSM) drive systems is considered in this paper. The model of the observer is developed in the Laplace domain and represents an original approach with respect to state-of-art proposals, normally employing a state-state representation. This allows a more intuitive but equivalent design of the observer's gains, based on the standard frequency response, as compared to eigenvalues analysis. Moreover steady-state errors are obtained from a theoretical point-of-view, including the effects of the most common non-idealities affecting the drive system (e.g. offsets) and parameters sensitivity. Full simulation and experimental characterization of the sensor-less drive is provided with reference to a general purpose industrial drive, i.e. both in transient and steady-state conditions and in the whole speed/torque operating range

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Sensorless flux-weakening control of permanent magnet brushless machines using third-harmonic back-EMF

Cited by 34 publications

References 13 publications

Influence of Stator Current and Machine Saliency on Sensorless Control Performance Based on Third-Harmonic Back-EMF

Influence of Stator Current and Machine Saliency on Sensorless Control Performance Based on Third-Harmonic Back-EMF

Anew scheme sensorless control of BLDC motor using software PLL and third harmonic back-emf

Design issues and estimation errors analysis of back-EMF based position and speed observer for SPM synchronous motors

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