Position and speed sensorless control for PMSM drive using direct position error estimation

We have developed a mathematical model for permanent magnet synchronous motors (PMSMs). The nonlinear characteristics of this model are expressed using a total of eight constants. The magnet flux characteristics of PMSMs can be obtained by using this simplified model. This model can also be transformed into a reverse function, and motor drive simulation including nonlinear characteristics can easily be implemented. Here, we present the simulation results using our nonlinear model. We also demonstrated the effectiveness of the model by simulating estimates of rotor positions based on magnet flux nonlinear characteristics.

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“…The Lledc is estimated with Eq. (9) with the conventional method [3 ]. The Lledc is regulated to zero by the PLL controller.…”

Section: Sensorless Methods Of Control By Us Ing N Modelmentioning

confidence: 99%

Motor drive system using nonlinear mathematical model for permanent magnet synchronous motors

Iwaji

Nakatsugawa

Sakai

et al. 2014

2014 International Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE ASIA)

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“…• Transient signal injection based schemes which exploit the PWM signal in order to extract the rotor position or to inject discrete test voltage pulses in a defined direction (Raute et al, 2007;Belie et al, 2010;Vogelsberger et al, 2010) • Continuous high frequency signal injection based schemes which consist on injection of signal reported to a rotating high frequency voltage vector in the stator reference frame (α,β), (Perassi et al, 2005;Hu et al, 2008) or injection of signal reported to a pulsating high frequency voltage vector in a reference frame (d,q) synchronous with the motor saliency (Aihara et al, 1999;Sakamoto et al, 2001;Holtz, 2008;Wiedmann et al, 2009;Kock et al, 2009) Transient signal injection schemes are very complex to be implemented for practical real time systems whereas continuous high frequency signal injection schemes are based on a simple excitation and are easier to be experimentally implemented. However, continuous HFSI technique performance and robustness depend on the parameters choice of the high frequency signal injected in order to extract the rotor position or the rotor position error (Taniguchi et al, 2007).…”

Section: Fig 1: Pmsm Sensorless Control Techniques Classificationmentioning

confidence: 99%

“…As the HFSI method consists in injecting a high frequency voltage on the d-axis rotor voltage, it causes magnetic saliency excitation (Aihara et al, 1999;Sakamoto et al, 2001). Then, the HFSI results in high frequency voltage and current components and in an error rotor position ∆θ e defined as Eq.…”

Section: High Frequency Pmsm Modelmentioning

confidence: 99%

Optimized High Frequency Signal Injection Based Permanent Magnet Synchronous Motor Rotor Position Estimation Applied to Washing Machines

Kechiche¹,

Sethom²,

Sammoud³

et al. 2011

American Journal of Engineering and Applied Sciences

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Problem statement:This study investigates a novel optimized scheme of a High Frequency Signal Injection (HFSI) based sensor less technique in order to carry out a precise and robust rotor position error estimation of a Permanent Magnet Synchronous Motor (PMSM) drive designed for washing machines. The study was carried out for standstill condition, where precise position information was required for this application. Approach: In order to get rotor position error information, a PMSM high frequency model was considered in the estimated rotor reference frame (d,q). The impact of the HFSI technique parameters choice on the PMSM rotor position estimation performance was studied and experimentally tested, under various injection conditions. Results: The experimental results show that the amplitude of the high frequency current, resulting from injection, was not significant to carry out high performance rotor position estimation. In order to improve rotor position estimation performance and robustness, a modified demodulation of the high frequency current resulting from injection was proposed by using a high pass filter amplifier applied to PMSM measured currents. The novel proposed rotor position error extraction scheme was implemented on a dsPIC30F6010A and was experimentally validated on a 1kW washing salient pole PMSM. Conclusion: This study presents an improved high frequency voltage injection based sensor less control for Permanent Magnet Synchronous Motor (PMSM) designed for washing machines. The optimal parameters choice of the HFSI technique and the use of a high pass filter amplifier have allowed to take the most of the high frequency injected signal for extracting the rotor position error at standstill, compared to a conventional scheme.

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“…This means that the EEMF model can reject saliency-dependent magnetic non-linearity, Consequently, the EEMF estimation makes it possible to reconstruct the rotor position and the speed without any restrictions. Hence, the EEMF model approach is recognized as the most standard method for position and speed estimation of IPMSMs and SynRMs and many researchers have tried to refine its performance (8) (9) . In addition, the extended-flux model representation has also been introduced as another method for magnetic-saliency rejection (10) .…”

Section: Modeling Techniques For Saliency-dependent Non-linearitymentioning

confidence: 99%

Trends in Motor Drive Techniques in Japan

Hasegawa

Doki

2012

IEEJ Journal IA

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This paper surveys some notable efforts on improvement of position sensorless control of interior permanent magnet synchronous motors and synchronous reluctance motors. These motors are widely utilized for saving energy and for their high power density, and the control techniques for these motors have advanced to address recent trends in motor development. This paper focuses particularly on the position estimation and current control techniques developed in Japan for motors with considerable magnetic non-linearity and demonstrates solutions that have been proposed for improvements in the performance of position sensorless control.

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Position and speed sensorless control for PMSM drive using direct position error estimation

Cited by 42 publications

References 4 publications

Motor drive system using nonlinear mathematical model for permanent magnet synchronous motors

Motor drive system using nonlinear mathematical model for permanent magnet synchronous motors

Optimized High Frequency Signal Injection Based Permanent Magnet Synchronous Motor Rotor Position Estimation Applied to Washing Machines

Trends in Motor Drive Techniques in Japan

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