Improved Closed-Loop Flux Observer Based Sensorless Control Against System Oscillation for Synchronous Reluctance Machine Drives

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Flux-linkage based sensorless control method is well-known and has been widely used in the control of electrical machines. The closed-loop flux observer (CLFO), which is the adaptive combination of the machine voltage and current models, is commonly adopted. It can cover a wide speed operation range and was considered to be able to solve the dc drift and initial value problem associated to the pure integrator used in the observer. However, it is reported in this paper that this popular CLFO cannot always work as expected. In some situations, dc-offsets cannot be removed by this flux observer, causing large system oscillation at fundamental frequency and is very harmful to the drive system. This important issue has not been reported and discussed in the existing literatures of the CLFO. In this paper, this phenomenon is experimentally illustrated and solution to damp this harmful oscillation is proposed and verified experimentally on a synchronous reluctance machine drive system.

OriginalsprogEngelsk
Artikelnummer8434357
TidsskriftIEEE Transactions on Power Electronics
Vol/bind34
Udgave nummer5
Sider (fra-til)4593 - 4602
Antal sider10
ISSN0885-8993
DOI
StatusUdgivet - maj 2019

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Fluxes
Control systems
Initial value problems
Sensorless control
Electric potential

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title = "Improved Closed-Loop Flux Observer Based Sensorless Control Against System Oscillation for Synchronous Reluctance Machine Drives",
abstract = "Flux-linkage based sensorless control method is well-known and has been widely used in the control of electrical machines. The closed-loop flux observer (CLFO), which is the adaptive combination of the machine voltage and current models, is commonly adopted. It can cover a wide speed operation range and was considered to be able to solve the dc drift and initial value problem associated to the pure integrator used in the observer. However, it is reported in this paper that this popular CLFO cannot always work as expected. In some situations, dc-offsets cannot be removed by this flux observer, causing large system oscillation at fundamental frequency and is very harmful to the drive system. This important issue has not been reported and discussed in the existing literatures of the CLFO. In this paper, this phenomenon is experimentally illustrated and solution to damp this harmful oscillation is proposed and verified experimentally on a synchronous reluctance machine drive system.",
keywords = "DC-offset, flux observer, nonideal proportional-resonant controller, sensorless, stability, synchronous reluctance machine (SynRM)",
author = "Dong Wang and Kaiyuan Lu and Rasmussen, {Peter Omand}",
year = "2019",
month = "5",
doi = "10.1109/TPEL.2018.2865348",
language = "English",
volume = "34",
pages = "4593 -- 4602",
journal = "I E E E Transactions on Power Electronics",
issn = "0885-8993",
publisher = "IEEE",
number = "5",

}

Improved Closed-Loop Flux Observer Based Sensorless Control Against System Oscillation for Synchronous Reluctance Machine Drives. / Wang, Dong; Lu, Kaiyuan; Rasmussen, Peter Omand.

I: IEEE Transactions on Power Electronics, Bind 34, Nr. 5, 8434357, 05.2019, s. 4593 - 4602.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Improved Closed-Loop Flux Observer Based Sensorless Control Against System Oscillation for Synchronous Reluctance Machine Drives

AU - Wang, Dong

AU - Lu, Kaiyuan

AU - Rasmussen, Peter Omand

PY - 2019/5

Y1 - 2019/5

N2 - Flux-linkage based sensorless control method is well-known and has been widely used in the control of electrical machines. The closed-loop flux observer (CLFO), which is the adaptive combination of the machine voltage and current models, is commonly adopted. It can cover a wide speed operation range and was considered to be able to solve the dc drift and initial value problem associated to the pure integrator used in the observer. However, it is reported in this paper that this popular CLFO cannot always work as expected. In some situations, dc-offsets cannot be removed by this flux observer, causing large system oscillation at fundamental frequency and is very harmful to the drive system. This important issue has not been reported and discussed in the existing literatures of the CLFO. In this paper, this phenomenon is experimentally illustrated and solution to damp this harmful oscillation is proposed and verified experimentally on a synchronous reluctance machine drive system.

AB - Flux-linkage based sensorless control method is well-known and has been widely used in the control of electrical machines. The closed-loop flux observer (CLFO), which is the adaptive combination of the machine voltage and current models, is commonly adopted. It can cover a wide speed operation range and was considered to be able to solve the dc drift and initial value problem associated to the pure integrator used in the observer. However, it is reported in this paper that this popular CLFO cannot always work as expected. In some situations, dc-offsets cannot be removed by this flux observer, causing large system oscillation at fundamental frequency and is very harmful to the drive system. This important issue has not been reported and discussed in the existing literatures of the CLFO. In this paper, this phenomenon is experimentally illustrated and solution to damp this harmful oscillation is proposed and verified experimentally on a synchronous reluctance machine drive system.

KW - DC-offset

KW - flux observer

KW - nonideal proportional-resonant controller

KW - sensorless

KW - stability

KW - synchronous reluctance machine (SynRM)

U2 - 10.1109/TPEL.2018.2865348

DO - 10.1109/TPEL.2018.2865348

M3 - Journal article

VL - 34

SP - 4593

EP - 4602

JO - I E E E Transactions on Power Electronics

JF - I E E E Transactions on Power Electronics

SN - 0885-8993

IS - 5

M1 - 8434357

ER -