Flux-Linkage-Based Current Control of Saturated Synchronous Motors

Hafiz Asad Ali Awan; Seppo E. Saarakkala; Marko Hinkkanen

doi:10.1109/TIA.2019.2919258

Flux-Linkage-Based Current Control of Saturated Synchronous Motors

Hafiz Asad Ali Awan, Seppo E. Saarakkala, Marko Hinkkanen

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Abstract

Magnetic saturation characteristics of synchronous reluctance motors (SyRMs), with or without permanent magnets (PMs), are highly nonlinear. These nonlinear effects can be included in the current controller by changing its state variable from the stator current to the stator flux linkage using the known saturation characteristics. A direct discrete-time variant of the flux-linkage based current controller is developed in a state-space framework. If the magnetics are modeled to be linear, the proposed control structure reduces to the standard current controller in this special case. Experimental results on a 6.7-kW SyRM drive demonstrate that the proposed flux-linkage based controller enables a higher closed-loop bandwidth and is more robust against parameter errors, as compared to the standard current controller.

Original language	English
Pages (from-to)	4762-4769
Number of pages	8
Journal	IEEE Transactions on Industry Applications
Volume	55
Issue number	5
DOIs	https://doi.org/10.1109/TIA.2019.2919258
Publication status	Published - 27 May 2019
MoE publication type	A1 Journal article-refereed

Keywords

Stators
Couplings
Rotors
Synchronous motors
Magnetics
Mathematical model
Curent control

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10.1109/TIA.2019.2919258

ELEC_Awan_etal_Flux-Linkage-Based_IEEETraIndAppl_2019_acceptedAccepted author manuscript, 1.59 MB

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Sensorless and bearingless reluctance motor drive
Hinkkanen, M., Sokolov, M., Mukherjee, V., Saarakkala, S. & Qu, Z.
01/09/2014 → 31/08/2018
Project: Academy of Finland: Other research funding

Cite this

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title = "Flux-Linkage-Based Current Control of Saturated Synchronous Motors",

abstract = "Magnetic saturation characteristics of synchronous reluctance motors (SyRMs), with or without permanent magnets (PMs), are highly nonlinear. These nonlinear effects can be included in the current controller by changing its state variable from the stator current to the stator flux linkage using the known saturation characteristics. A direct discrete-time variant of the flux-linkage based current controller is developed in a state-space framework. If the magnetics are modeled to be linear, the proposed control structure reduces to the standard current controller in this special case. Experimental results on a 6.7-kW SyRM drive demonstrate that the proposed flux-linkage based controller enables a higher closed-loop bandwidth and is more robust against parameter errors, as compared to the standard current controller.",

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N2 - Magnetic saturation characteristics of synchronous reluctance motors (SyRMs), with or without permanent magnets (PMs), are highly nonlinear. These nonlinear effects can be included in the current controller by changing its state variable from the stator current to the stator flux linkage using the known saturation characteristics. A direct discrete-time variant of the flux-linkage based current controller is developed in a state-space framework. If the magnetics are modeled to be linear, the proposed control structure reduces to the standard current controller in this special case. Experimental results on a 6.7-kW SyRM drive demonstrate that the proposed flux-linkage based controller enables a higher closed-loop bandwidth and is more robust against parameter errors, as compared to the standard current controller.

AB - Magnetic saturation characteristics of synchronous reluctance motors (SyRMs), with or without permanent magnets (PMs), are highly nonlinear. These nonlinear effects can be included in the current controller by changing its state variable from the stator current to the stator flux linkage using the known saturation characteristics. A direct discrete-time variant of the flux-linkage based current controller is developed in a state-space framework. If the magnetics are modeled to be linear, the proposed control structure reduces to the standard current controller in this special case. Experimental results on a 6.7-kW SyRM drive demonstrate that the proposed flux-linkage based controller enables a higher closed-loop bandwidth and is more robust against parameter errors, as compared to the standard current controller.

KW - Stators

KW - Couplings

KW - Rotors

KW - Synchronous motors

KW - Magnetics

KW - Mathematical model

KW - Curent control

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JO - IEEE Transactions on Industry Applications

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Flux-Linkage-Based Current Control of Saturated Synchronous Motors

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Keywords

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Sensorless and bearingless reluctance motor drive

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