EPE Association: EPE 2011 - LS2g: Topic 12: Sensorless Techniques

EPE 2011 - LS2g: Topic 12: Sensorless Techniques
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2011 ECCE Europe - Conference > EPE 2011 - Topic 12: High performance drives > EPE 2011 - LS2g: Topic 12: Sensorless Techniques

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   Encoderless Field-Oriented Control of a Synchronous Reluctance Machine with an Estimator in Polar Stator-Current Coordinates
By Jean-François STUMPER, Dirk PAULUS, Ralph KENNEL [View]
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Abstract: A rotor position estimator for a synchronous reluctance machine (SynRM) is presented. The rotor position is formulated in polar stator-current coordinates and is directly calculated based on stator current measurements and voltage commands. Only two machine parameters are required, stator resistance and average inductance. The scheme is easy to implement and has good dynamical and load rejection characteristics. An analysis and experimental results are presented.

   High Performance Position Sensorless Control Using Rotating Voltage Signal Injection in IPMSM
By Sungmin KIM, Seung-Ki SUL [View]
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Abstract: This paper describes a new position sensorless control method based on the high frequency rotating voltage signal injection to an Interior Permanent Magnet Synchronous Motor (IPMSM) drives. In this method, the rotor position can be directly calculated from four successive sampled current and voltage values. Compared to conventional heterodyning process, the proposed method is simple to implement and appropriate to increase the frequency of the injection signal up to a half PWM switching frequency. Because of the higher frequency injection and no low-pass-filter in demodulation, the control performance can be enhanced conspicuously.

   Surface Permanent Magnet Synchronous Machine Self-Sensing Position Estimation at Low Speed Using Eddy Current Reflected Asymmetric Resistance
By Shih-Chin YANG, Robert LORENZ [View]
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Abstract: This paper proposes an alternative position self-sensing method of surface permanent magnet (SPM) machines at low speed using high frequency (HF) signal injection. SPM machines traditionally do not have enough spatial saliency signals because their symmetric rotors result in near zero inductance variation. The proposed solution is to track the HF eddy current reflected asymmetric resistance for position estimation. It will be shown that the spatial variation of resistance can be enhanced when a HF signal is superimposed. Finite element analysis is performed to investigate the asymmetric resistance in different SPM machines. By superimposing a d-axis pulsating vector HF signal, SPM machines can achieve the self-sensing position estimation performance with reduced degradation at high load conditions. Implementation methods are developed to estimate the resistance-based spatial saliency signal for speed and position closed-loop control. A SPM machine prototype with a ring magnet rotor is used for the experimental evaluation.

EPE 2011 - LS2g: Topic 12: Sensorless Techniques
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2011 ECCE Europe - Conference > EPE 2011 - Topic 12: High performance drives > EPE 2011 - LS2g: Topic 12: Sensorless Techniques
	[return to parent folder]

	Encoderless Field-Oriented Control of a Synchronous Reluctance Machine with an Estimator in Polar Stator-Current Coordinates By Jean-François STUMPER, Dirk PAULUS, Ralph KENNEL	[View] [Download]
Abstract: A rotor position estimator for a synchronous reluctance machine (SynRM) is presented. The rotor position is formulated in polar stator-current coordinates and is directly calculated based on stator current measurements and voltage commands. Only two machine parameters are required, stator resistance and average inductance. The scheme is easy to implement and has good dynamical and load rejection characteristics. An analysis and experimental results are presented.

	High Performance Position Sensorless Control Using Rotating Voltage Signal Injection in IPMSM By Sungmin KIM, Seung-Ki SUL	[View] [Download]
Abstract: This paper describes a new position sensorless control method based on the high frequency rotating voltage signal injection to an Interior Permanent Magnet Synchronous Motor (IPMSM) drives. In this method, the rotor position can be directly calculated from four successive sampled current and voltage values. Compared to conventional heterodyning process, the proposed method is simple to implement and appropriate to increase the frequency of the injection signal up to a half PWM switching frequency. Because of the higher frequency injection and no low-pass-filter in demodulation, the control performance can be enhanced conspicuously.

	Surface Permanent Magnet Synchronous Machine Self-Sensing Position Estimation at Low Speed Using Eddy Current Reflected Asymmetric Resistance By Shih-Chin YANG, Robert LORENZ	[View] [Download]
Abstract: This paper proposes an alternative position self-sensing method of surface permanent magnet (SPM) machines at low speed using high frequency (HF) signal injection. SPM machines traditionally do not have enough spatial saliency signals because their symmetric rotors result in near zero inductance variation. The proposed solution is to track the HF eddy current reflected asymmetric resistance for position estimation. It will be shown that the spatial variation of resistance can be enhanced when a HF signal is superimposed. Finite element analysis is performed to investigate the asymmetric resistance in different SPM machines. By superimposing a d-axis pulsating vector HF signal, SPM machines can achieve the self-sensing position estimation performance with reduced degradation at high load conditions. Implementation methods are developed to estimate the resistance-based spatial saliency signal for speed and position closed-loop control. A SPM machine prototype with a ring magnet rotor is used for the experimental evaluation.