Low Switching Frequency Model Predictive Control of Three-Level Inverter-Fed im Drives with Speed-Sensorless and Field-Weakening Operations

Zhang, Y; Bai, Y; Yang, H; Zhang, B

Low Switching Frequency Model Predictive Control of Three-Level Inverter-Fed im Drives with Speed-Sensorless and Field-Weakening Operations

Zhang, Y Bai, Y Yang, H

Zhang, B

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Publication Type:: Journal Article
Citation:: IEEE Transactions on Industrial Electronics, 2019, 66 (6), pp. 4262 - 4272
Issue Date:: 2019-06-01

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Field	Value	Language
dc.contributor.author	Zhang, Y	en_US
dc.contributor.author	Bai, Y	en_US
dc.contributor.author	Yang, H https://orcid.org/0000-0002-4987-5794	en_US
dc.contributor.author	Zhang, B	en_US
dc.date.issued	2019-06-01	en_US
dc.identifier.citation	IEEE Transactions on Industrial Electronics, 2019, 66 (6), pp. 4262 - 4272	en_US
dc.identifier.issn	0278-0046	en_US
dc.identifier.uri	http://hdl.handle.net/10453/135479
dc.description.abstract	© 1982-2012 IEEE. This paper proposes a single-vector-based model predictive control (MPC) for an induction motor drive supplied by a three-level neutral-point-clamped inverter operating at a low switching frequency. Unlike the torque and flux control in the conventional MPC, the proposed MPC tries to minimize the error between the applied voltage vector and a reference voltage vector obtained based on the principle of deadbeat control, thereby reducing the number of weighting factors in the cost function. To reduce the computational burden and restrict the high jumps in both phase and line voltages, two switching tables are proposed and compared for the preselection of candidate voltage vectors. The neutral point potential fluctuation and switching frequency are also included in the cost function to achieve the balance between the upper and lower dc voltages and a relatively low switching frequency. Furthermore, a speed adaptive stator flux observer with a novel gain matrix is proposed to achieve speed-sensorless operation, which has a higher speed and flux estimation accuracy than conventional fixed gains. Finally, the proposed MPC is extended to the field-weakening operation by adjusting the torque and stator flux references online, which significantly widens the speed range and improves the practical value of the MPC. The effectiveness of the proposed method is confirmed by the experimental results obtained at an average switching frequency of less than 600 Hz.	en_US
dc.relation.ispartof	IEEE Transactions on Industrial Electronics	en_US
dc.relation.isbasedon	10.1109/TIE.2018.2868014	en_US
dc.subject.classification	Electrical & Electronic Engineering	en_US
dc.title	Low Switching Frequency Model Predictive Control of Three-Level Inverter-Fed im Drives with Speed-Sensorless and Field-Weakening Operations	en_US
dc.type	Journal Article
utslib.citation.volume	6	en_US
utslib.citation.volume	66	en_US
utslib.for	0906 Electrical and Electronic Engineering	en_US
utslib.for	08 Information and Computing Sciences	en_US
utslib.for	09 Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Students
utslib.copyright.status	closed_access
pubs.issue	6	en_US
pubs.publication-status	Published	en_US
pubs.volume	66	en_US

Abstract:

© 1982-2012 IEEE. This paper proposes a single-vector-based model predictive control (MPC) for an induction motor drive supplied by a three-level neutral-point-clamped inverter operating at a low switching frequency. Unlike the torque and flux control in the conventional MPC, the proposed MPC tries to minimize the error between the applied voltage vector and a reference voltage vector obtained based on the principle of deadbeat control, thereby reducing the number of weighting factors in the cost function. To reduce the computational burden and restrict the high jumps in both phase and line voltages, two switching tables are proposed and compared for the preselection of candidate voltage vectors. The neutral point potential fluctuation and switching frequency are also included in the cost function to achieve the balance between the upper and lower dc voltages and a relatively low switching frequency. Furthermore, a speed adaptive stator flux observer with a novel gain matrix is proposed to achieve speed-sensorless operation, which has a higher speed and flux estimation accuracy than conventional fixed gains. Finally, the proposed MPC is extended to the field-weakening operation by adjusting the torque and stator flux references online, which significantly widens the speed range and improves the practical value of the MPC. The effectiveness of the proposed method is confirmed by the experimental results obtained at an average switching frequency of less than 600 Hz.

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