Maximum Efficiency per Torque Control of Permanent-Magnet Synchronous Machines
High-efficiency permanent-magnet synchronous machine (PMSM) drive systems need not only optimally designed motors but also efficiency-oriented control strategies. However, the existing control strategies only focus on partial loss optimization. This paper proposes a novel analytic loss model of PMSM...
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doaj-399225c3852d454da6da93912cff8c522020-11-25T01:29:28ZengMDPI AGApplied Sciences2076-34172016-12-0161242510.3390/app6120425app6120425Maximum Efficiency per Torque Control of Permanent-Magnet Synchronous MachinesQingbo Guo0Chengming Zhang1Liyi Li2Jiangpeng Zhang3Mingyi Wang4Department of Electrical Engineering, Harbin Institute of Technology University, Room 205, Building 2C, Science Park of Harbin Institute of Technology, No. 2 of Yikuang Street, Nangang District, Harbin 150001, ChinaDepartment of Electrical Engineering, Harbin Institute of Technology University, Room 205, Building 2C, Science Park of Harbin Institute of Technology, No. 2 of Yikuang Street, Nangang District, Harbin 150001, ChinaDepartment of Electrical Engineering, Harbin Institute of Technology University, Room 205, Building 2C, Science Park of Harbin Institute of Technology, No. 2 of Yikuang Street, Nangang District, Harbin 150001, ChinaDepartment of Electrical Engineering, Harbin Institute of Technology University, Room 205, Building 2C, Science Park of Harbin Institute of Technology, No. 2 of Yikuang Street, Nangang District, Harbin 150001, ChinaDepartment of Electrical Engineering, Harbin Institute of Technology University, Room 205, Building 2C, Science Park of Harbin Institute of Technology, No. 2 of Yikuang Street, Nangang District, Harbin 150001, ChinaHigh-efficiency permanent-magnet synchronous machine (PMSM) drive systems need not only optimally designed motors but also efficiency-oriented control strategies. However, the existing control strategies only focus on partial loss optimization. This paper proposes a novel analytic loss model of PMSM in either sine-wave pulse-width modulation (SPWM) or space vector pulse width modulation (SVPWM) which can take into account both the fundamental loss and harmonic loss. The fundamental loss is divided into fundamental copper loss and fundamental iron loss which is estimated by the average flux density in the stator tooth and yoke. In addition, the harmonic loss is obtained from the Bertotti iron loss formula by the harmonic voltages of the three-phase inverter in either SPWM or SVPWM which are calculated by double Fourier integral analysis. Based on the analytic loss model, this paper proposes a maximum efficiency per torque (MEPT) control strategy which can minimize the electromagnetic loss of PMSM in the whole operation range. As the loss model of PMSM is too complicated to obtain the analytical solution of optimal loss, a golden section method is applied to achieve the optimal operation point accurately, which can make PMSM work at maximum efficiency. The optimized results between SPWM and SVPWM show that the MEPT in SVPWM has a better effect on the optimization performance. Both the theory analysis and experiment results show that the MEPT control can significantly improve the efficiency performance of the PMSM in each operation condition with a satisfied dynamic performance.http://www.mdpi.com/2076-3417/6/12/425maximum efficiency per torque controlefficiency improvementPMSMfundamental lossharmonic losscopper lossiron lossdouble Fourier integral analysis |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Qingbo Guo Chengming Zhang Liyi Li Jiangpeng Zhang Mingyi Wang |
spellingShingle |
Qingbo Guo Chengming Zhang Liyi Li Jiangpeng Zhang Mingyi Wang Maximum Efficiency per Torque Control of Permanent-Magnet Synchronous Machines Applied Sciences maximum efficiency per torque control efficiency improvement PMSM fundamental loss harmonic loss copper loss iron loss double Fourier integral analysis |
author_facet |
Qingbo Guo Chengming Zhang Liyi Li Jiangpeng Zhang Mingyi Wang |
author_sort |
Qingbo Guo |
title |
Maximum Efficiency per Torque Control of Permanent-Magnet Synchronous Machines |
title_short |
Maximum Efficiency per Torque Control of Permanent-Magnet Synchronous Machines |
title_full |
Maximum Efficiency per Torque Control of Permanent-Magnet Synchronous Machines |
title_fullStr |
Maximum Efficiency per Torque Control of Permanent-Magnet Synchronous Machines |
title_full_unstemmed |
Maximum Efficiency per Torque Control of Permanent-Magnet Synchronous Machines |
title_sort |
maximum efficiency per torque control of permanent-magnet synchronous machines |
publisher |
MDPI AG |
series |
Applied Sciences |
issn |
2076-3417 |
publishDate |
2016-12-01 |
description |
High-efficiency permanent-magnet synchronous machine (PMSM) drive systems need not only optimally designed motors but also efficiency-oriented control strategies. However, the existing control strategies only focus on partial loss optimization. This paper proposes a novel analytic loss model of PMSM in either sine-wave pulse-width modulation (SPWM) or space vector pulse width modulation (SVPWM) which can take into account both the fundamental loss and harmonic loss. The fundamental loss is divided into fundamental copper loss and fundamental iron loss which is estimated by the average flux density in the stator tooth and yoke. In addition, the harmonic loss is obtained from the Bertotti iron loss formula by the harmonic voltages of the three-phase inverter in either SPWM or SVPWM which are calculated by double Fourier integral analysis. Based on the analytic loss model, this paper proposes a maximum efficiency per torque (MEPT) control strategy which can minimize the electromagnetic loss of PMSM in the whole operation range. As the loss model of PMSM is too complicated to obtain the analytical solution of optimal loss, a golden section method is applied to achieve the optimal operation point accurately, which can make PMSM work at maximum efficiency. The optimized results between SPWM and SVPWM show that the MEPT in SVPWM has a better effect on the optimization performance. Both the theory analysis and experiment results show that the MEPT control can significantly improve the efficiency performance of the PMSM in each operation condition with a satisfied dynamic performance. |
topic |
maximum efficiency per torque control efficiency improvement PMSM fundamental loss harmonic loss copper loss iron loss double Fourier integral analysis |
url |
http://www.mdpi.com/2076-3417/6/12/425 |
work_keys_str_mv |
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