EPE Association: EPE 2017 - LS1e: PMSM and SM issues

EPE 2017 - LS1e: PMSM and SM issues
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2017 ECCE Europe - Conference > EPE 2017 - Topic 04: Electrical Machines and Drive Systems > EPE 2017 - LS1e: PMSM and SM issues

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   Cogging Force Compensation of a Discontinuous Permanent Magnet Track Linear Motor Drive
By Niko NEVARANTA [View]
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Abstract: Permanent magnet track linear motor drives are used in numerous industrial manufacturing processes covering a wide range of material handling and conveyor applications. A traditional solution is a permanent magnet linear motor (PMLM) in which the stationary part consists of permanent magnets and the moving part of the armature. To further reduce the initial costs of such a permanent magnet track linear motor drive system, the track elements can be assembled in a discontinuous fashion, that is, by forming a track that includes magnets for accelerating and decelarting the mover and areas where the mover is freewheeling. As a result, the mover has to face regions with and without magnets, resulting in disturbance forces during the edge crossings. In this paper, a disturbance force compensation method for a non-salient permanent magnet linear motor with a discontinuous magnet track is proposed. The disturbances forces, namely the cogging forces, are estimated by using a special PMLM test setup and used to built the compensation routine. Experimental results are provided to verify the estimation and the compensation routines.

   Comparison of Copper Loss Minimization and Field Current Minimization for Electrically Excited Synchronous Motor in Mild Hybrid Drives
By JUNFEI TANG [View]
[Download]

Abstract: Electrically Excited Synchronous Motor (EESM) serves as an option on hybrid vehicle applications. An EESM for mild hybrid application is designed in this study. Copper loss minimization and field current minimization are analyzed for current control strategies of EESM. Both of the current control strategies are applied and comparisons between the two are made thereafter. In both of the strategies, high efficiency is achieved in the high speed region whereas high power factor is achieved in the high torque region. Copper loss minimization gives a larger operation area of high efficiency and high power factor, whereas the rotor heat generation can be reduced when field current minimization is applied.

   Effect of Dynamic Magnetization Manipulation on Transient Losses and Magnet Temperature in Energy-Saving VF-PMSM Traction Drives
By Apoorva ATHAVALE [View]
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Abstract: Dynamic manipulation of magnetization state (MS) in variable flux permanent magnet synchronous machines (VF-PMSMs) during normal operation based on the torque-speed operating conditions has been shown to significantly reduce machine losses over urban driving cycles. However, the additional losses that are induced during the dynamic MS manipulation have not been evaluated. This paper presents a combination of finite element analysis (FEA) and experimental high bandwidth measurement techniques to estimate the transient losses during dynamic MS manipulation. The effect of these losses on the magnet temperature is analyzed experimentally and also by using a thermal equivalent circuit.

   Flux-Weakening Control Method Applying Virtual Inductance for Direct Torque Control of Permanent Magnet Synchronous Motors
By Tetsuya MATSUYAMA [View]
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Abstract: Direct torque control (DTC), which is one type of PMSM drive system, can realize maximum-torque-per-ampere (MTPA) control and flux-weakening control by yielding an optimum target magnetic flux. In this paper, we propose armature reaction flux control that can achieve flux weakening control for PMSM control systems using DTC. Our proposed control focuses on the equivalence of the reactive power, which is an inner product of the stator magnetic flux vector and a current vector. To achieve flux-weakening control, the proposed control corrects the reference flux to shift the current phase to produce the desired stator voltage. The effectiveness of the proposed control is experimentally confirmed.

EPE 2017 - LS1e: PMSM and SM issues
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2017 ECCE Europe - Conference > EPE 2017 - Topic 04: Electrical Machines and Drive Systems > EPE 2017 - LS1e: PMSM and SM issues
	[return to parent folder]

	Cogging Force Compensation of a Discontinuous Permanent Magnet Track Linear Motor Drive By Niko NEVARANTA	[View] [Download]
Abstract: Permanent magnet track linear motor drives are used in numerous industrial manufacturing processes covering a wide range of material handling and conveyor applications. A traditional solution is a permanent magnet linear motor (PMLM) in which the stationary part consists of permanent magnets and the moving part of the armature. To further reduce the initial costs of such a permanent magnet track linear motor drive system, the track elements can be assembled in a discontinuous fashion, that is, by forming a track that includes magnets for accelerating and decelarting the mover and areas where the mover is freewheeling. As a result, the mover has to face regions with and without magnets, resulting in disturbance forces during the edge crossings. In this paper, a disturbance force compensation method for a non-salient permanent magnet linear motor with a discontinuous magnet track is proposed. The disturbances forces, namely the cogging forces, are estimated by using a special PMLM test setup and used to built the compensation routine. Experimental results are provided to verify the estimation and the compensation routines.

	Comparison of Copper Loss Minimization and Field Current Minimization for Electrically Excited Synchronous Motor in Mild Hybrid Drives By JUNFEI TANG	[View] [Download]
Abstract: Electrically Excited Synchronous Motor (EESM) serves as an option on hybrid vehicle applications. An EESM for mild hybrid application is designed in this study. Copper loss minimization and field current minimization are analyzed for current control strategies of EESM. Both of the current control strategies are applied and comparisons between the two are made thereafter. In both of the strategies, high efficiency is achieved in the high speed region whereas high power factor is achieved in the high torque region. Copper loss minimization gives a larger operation area of high efficiency and high power factor, whereas the rotor heat generation can be reduced when field current minimization is applied.

	Effect of Dynamic Magnetization Manipulation on Transient Losses and Magnet Temperature in Energy-Saving VF-PMSM Traction Drives By Apoorva ATHAVALE	[View] [Download]
Abstract: Dynamic manipulation of magnetization state (MS) in variable flux permanent magnet synchronous machines (VF-PMSMs) during normal operation based on the torque-speed operating conditions has been shown to significantly reduce machine losses over urban driving cycles. However, the additional losses that are induced during the dynamic MS manipulation have not been evaluated. This paper presents a combination of finite element analysis (FEA) and experimental high bandwidth measurement techniques to estimate the transient losses during dynamic MS manipulation. The effect of these losses on the magnet temperature is analyzed experimentally and also by using a thermal equivalent circuit.

	Flux-Weakening Control Method Applying Virtual Inductance for Direct Torque Control of Permanent Magnet Synchronous Motors By Tetsuya MATSUYAMA	[View] [Download]
Abstract: Direct torque control (DTC), which is one type of PMSM drive system, can realize maximum-torque-per-ampere (MTPA) control and flux-weakening control by yielding an optimum target magnetic flux. In this paper, we propose armature reaction flux control that can achieve flux weakening control for PMSM control systems using DTC. Our proposed control focuses on the equivalence of the reactive power, which is an inner product of the stator magnetic flux vector and a current vector. To achieve flux-weakening control, the proposed control corrects the reference flux to shift the current phase to produce the desired stator voltage. The effectiveness of the proposed control is experimentally confirmed.