Dynamic Properties of Back-emf Based Sensorless Drives

Ribeiro, Luiz A. de S.; Harke, M.C.; Lorenz, Robert D.

doi:10.1109/ias.2006.256814

Cited by 36 publications

(16 citation statements)

References 20 publications

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“…However, the problem with these methods is that sensorless operation can fail due to parameter mismatches or variations, especially in low speed operation or mode transition [25]. In [26], online stator flux and resistance estimators are proposed to improve sensorless operation at low speed.…”

Section: Introductionmentioning

confidence: 99%

Improved Sensorless Control of Interior Permanent Magnet Sensorless Motors Using an Active Damping Control Strategy

Cho

2016

Energies

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This paper proposes the active damping control strategy for position sensorless operation of an interior permanent magnet (IPM) motor. The proposed method is applied to both the current controller and the position estimator to control damping characteristics of the IPM drive system. By actively increasing the damping characteristics of the system with the proposed method, the current control and the position estimation loops become immune to parameter variation of the stator resistance which may degrade the accuracy of the position estimator. To analyze the accuracy of the position estimator with and without the proposed method, a small-signal analysis is carried out for low speed operation where the effect of the parameter variation is relatively large due to a low signal-to-noise ratio (SNR). Additionally, an open-loop voltage to angular velocity transfer function including the electrical and the mechanical parameters is investigated. Since no hardware modifications are necessary, the proposed method can be easily implemented just in software routines. Both the simulations and the experimental validations in which the proposed active damping control strategy is incorporated with the existing extended electromotive force (EMF)-based sensorless algorithm are provided to support the effectiveness of the proposed method.

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Section: Introductionmentioning

confidence: 99%

Improved Sensorless Control of Interior Permanent Magnet Sensorless Motors Using an Active Damping Control Strategy

Cho

2016

Energies

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“…Detailed analyses of the dynamic properties of the back emf estimator with observers or phase locked loop (PLL) can be found in [8], [6] and [9]. The back emf estimator was applied to the interior permanent magnet synchronous machine (IPMSM) with the concept of the extended back emf in [14].…”

Section: Evaluation Of Methods For the Operation Of Pmsm Without Posimentioning

confidence: 99%

Evaluation of methods for the operation of PMSM without position sensor

Koschik

Treek

Doncker

2011

8th International Conference on Power Electronics - ECCE Asia

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This paper presents an analytical evaluation of sensorless methods for the operation of permanent magnet synchronous machines. The influence of position estimation errors on the stability of a current controller and the deviation of the actual current value from the reference current are considered. Taking these effects into consideration, a flux estimator and a signal injection method are analyzed. Accuracy estimations and design guidelines for the implementation of the two methods are given.Index Terms-flux estimator, sensorless control, signal injection NOMENCLATURE i r d , i r q d-and q-axes currents in rotor frame u r d , u r q d-and q-axes voltages in rotor frame L d , L q d-and q-axes inductances L d ,L q estimated d-and q-axes inductances R s ,R s stator resistance and estimated value ω s r

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“…Sensorless control of AC machines has been the focus of significant research efforts during the last years [8][9][10][11][12][13][14][15][16][17][18][19][20][21], the proposed methods being primarily focused on IMs and PMSMs [8][9][10][11][12][13][14][15][16][17]. These techniques can be roughly classified into fundamental excitation based methods and high frequency signal injection based methods.…”

Section: Introductionmentioning

confidence: 99%

Sensorless control of doubly-fed induction generators based on stator high frequency signal injection

Reigosa

Briz

Blanco

et al. 2013

2013 IEEE Energy Conversion Congress and Exposition

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High frequency signal injection based methods have been widely investigated for sensorless position/speed control of induction machines (IMs), permanent magnet synchronous machines (PMSMs) and more recently for doubly fed induction generators (DFIGs). When used with IMs and PMSMs, the high frequency signal is injected in the stator windings, an asymmetric (salient) rotor being required for this case. Contrary to this, both stator and rotor terminals are accessible and sensored in DFIGs, being therefore possible to inject the high frequency signal either in the stator or the rotor terminals. As consequence of this, the method can be used even if the machine is non-salient. In the implementation of the method with DFIGs, the high frequency voltage signal is typically injected in the rotor, the high frequency components (voltages of currents) induced in the stator being used for rotor position estimation. A drawback of this alternative is that the method is sensitive to the grid impedance in the stator side, which will be affected by the grid configuration, and is normally unknown. This paper proposes the sensorless control a DFIG injecting the high frequency voltage in the stator side, and using a high frequency current cancellation strategy in the rotor side. The main advantage of the proposed strategy is that the estimated position is independent of the grid characteristics. 1Index Terms -DFIG, high frequency signal injection, sensorless control.

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Dynamic Properties of Back-emf Based Sensorless Drives

Cited by 36 publications

References 20 publications

Improved Sensorless Control of Interior Permanent Magnet Sensorless Motors Using an Active Damping Control Strategy

Improved Sensorless Control of Interior Permanent Magnet Sensorless Motors Using an Active Damping Control Strategy

Evaluation of methods for the operation of PMSM without position sensor

Sensorless control of doubly-fed induction generators based on stator high frequency signal injection

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