EPE Association: EPE 2007 - Subtopic 12-2 - LS: High performance drives

EPE 2007 - Subtopic 12-2 - LS: High performance drives
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2007 - Conference > EPE 2007 - Topic 12: 'High performance drives' > EPE 2007 - Subtopic 12-2 - LS: High performance drives

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   New flux weakening control for high saliency interior permanent magnet synchronous machine without any tables
By YOON Young-Doo; LEE Wook-Jin; SUL Seung-Ki [View]
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Abstract: This paper presents a new flux weakening algorithm for high saliency Interior Permanent Magnet Synchronous Machine. The proposed method modifies the current reference not by look-up tables, but by a controller in order to achieve a flux weakening. The current reference modification is determined by the d-q axis current and output voltage using the gradient descent method. The proposed method consists of two part, the determination of the flux weakening region and the current reference modification. The flux weakening region is determined by the angle between the constant torque direction and the voltage decreasing direction, and the current reference is modified by the flux weakening direction and the voltage magnitude according to the flux weakening region. Moreover, this method can be applied to the infinite speed drive system as well as the fininite speed drive system. The feasibility of the proposed method has been verified by the experimental results.

   Modelling Magnetic Saturation Effects in IPMSMs for use in Sensorless Saliency Based Methods
By MATZEN Torben; O. RASMUSSEN Peter [View]
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Abstract: A model of the IPMSM with magnetic saturation is presented. The model is based on flux linkage data from a finite element model where the anhysteretic BH curve is included in the material properties of the stator and rotor. The simulated flux linkage data are used in a modified IPMSM dq model using two look up tables. Using the modified IPMSM model with the flux linkage data, simulation results are obtained and compaired with experimental results. Both simulation and experimental results reveals a large but similar significant differential inductance variation. The inductance variation may influence sensorless saliency based methods which is based on the inductance in the d- and q-axis of the machine. The post processing of the results gave rise to a sensorless position estimation method based on principle component analysis (PCA).

   Self-tuning of MTPA current vector generation scheme for IPM synchronous motor drives
By SGARBOSSA Luca; BOLOGNANI Silverio; ZORDAN Marco [View]
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Abstract: High performance PMSM drives require accurate selection of the current vector reference to be inputted to a suitable current control algorithm. This work implements a drive prototype with a current vector generation scheme which can be self-adjusted in "quasi real-time" to the actual maximum torque per amps locus. The model doesn't have to rely on computed or estimated motor parameters, but only on the analysis of additional signals superimposed on the driving voltages/currents, without affecting the overall drive performance.

EPE 2007 - Subtopic 12-2 - LS: High performance drives
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2007 - Conference > EPE 2007 - Topic 12: 'High performance drives' > EPE 2007 - Subtopic 12-2 - LS: High performance drives
	[return to parent folder]

	New flux weakening control for high saliency interior permanent magnet synchronous machine without any tables By YOON Young-Doo; LEE Wook-Jin; SUL Seung-Ki	[View] [Download]
Abstract: This paper presents a new flux weakening algorithm for high saliency Interior Permanent Magnet Synchronous Machine. The proposed method modifies the current reference not by look-up tables, but by a controller in order to achieve a flux weakening. The current reference modification is determined by the d-q axis current and output voltage using the gradient descent method. The proposed method consists of two part, the determination of the flux weakening region and the current reference modification. The flux weakening region is determined by the angle between the constant torque direction and the voltage decreasing direction, and the current reference is modified by the flux weakening direction and the voltage magnitude according to the flux weakening region. Moreover, this method can be applied to the infinite speed drive system as well as the fininite speed drive system. The feasibility of the proposed method has been verified by the experimental results.

	Modelling Magnetic Saturation Effects in IPMSMs for use in Sensorless Saliency Based Methods By MATZEN Torben; O. RASMUSSEN Peter	[View] [Download]
Abstract: A model of the IPMSM with magnetic saturation is presented. The model is based on flux linkage data from a finite element model where the anhysteretic BH curve is included in the material properties of the stator and rotor. The simulated flux linkage data are used in a modified IPMSM dq model using two look up tables. Using the modified IPMSM model with the flux linkage data, simulation results are obtained and compaired with experimental results. Both simulation and experimental results reveals a large but similar significant differential inductance variation. The inductance variation may influence sensorless saliency based methods which is based on the inductance in the d- and q-axis of the machine. The post processing of the results gave rise to a sensorless position estimation method based on principle component analysis (PCA).

	Self-tuning of MTPA current vector generation scheme for IPM synchronous motor drives By SGARBOSSA Luca; BOLOGNANI Silverio; ZORDAN Marco	[View] [Download]
Abstract: High performance PMSM drives require accurate selection of the current vector reference to be inputted to a suitable current control algorithm. This work implements a drive prototype with a current vector generation scheme which can be self-adjusted in "quasi real-time" to the actual maximum torque per amps locus. The model doesn't have to rely on computed or estimated motor parameters, but only on the analysis of additional signals superimposed on the driving voltages/currents, without affecting the overall drive performance.