Extended Speed Range Control of Axial Flux ... - Semantic Scholar
14 International Journal of Advanced Pervasive and Ubiquitous Computing, 5(3), 14-22, July-September 2013
Extended Speed Range Control of Axial Flux Ironless PMSM using Current-Source Inverter Xiaoyuan Wang, School of Electrical Engineering and Automation, Tianjin University, Tianjin, China Xiaoguang Wang, School of Electrical Engineering and Automation, Tianjin University, Tianjin, China Tao Fu, School of Electrical Engineering and Automation, Tianjin University, Tianjin, China
ABSTRACT Axial flux ironless permanent magnetic synchronous motor (AFIPMSM) is a new permanent magnetic motor. It has many advantages, such as little volume, low mass, low lost, high power density, no cogging torque, and the sinusoidal back EMF. It gradually becomes the good choice in drive system. However, because of the coreless structure and the long air gap, the winding inductance is small, which causes the current is not continued with the PWM control based on VSI. On the other hand, the armature reaction is so small that it is difficulties to weakening flux. The motor only be working under the base speed. To solve this problem, a novel speed control strategy to operate a current source inverter (CSI) driven AFIPMSM. And a modified dc-dc converter is used to boost the voltage of DC-link, which can extend the operating ranges of speed. Simulation and experimental results confirm the validity of the proposed control method. Keywords:
Automatic Control Strategy of Torque, Buck Converter, Current Source Inverter (CSI), Disc Coreless, Permanent Magnet Synchronous Motor (PMSM)
1. INTRODUCTION Axial flux ironless permanent magnetic synchronous motor (AFIPMSM) have the advantages of high power density, small size, high overload capability, efficiency, no cogging torque and reluctance torque (Wang Xiaoyuan, Chen Jing, Guo Yu, 2009; Xiaoyuan Wang,
Jingjuan Du, 2006). The AFIPMSM with onestator-two-rotor is shown in Figure 1. Outer rotor is applied in this motor. Nd-Fe-B permanent material and Halbach array is applied to the permanent material. The magnetic field of one side is increased, the other side is decreased. The flux density in circumferential direction is approximate sinusoidal distribution, which
DOI: 10.4018/ijapuc.2013070102 Copyright © 2013, IGI Global. Copying or distributing in print or electronic forms without written permission of IGI Global is prohibited.
International Journal of Advanced Pervasive and Ubiquitous Computing, 5(3), 14-22, July-September 2013 15
makes the motor’s back-EMF is sinusoidal. The waveformof no-load back EMF is shown in Figure 1 (b). Although the AFIPMSM has more than a series of advantages,but as the coreless structure and the long air gap, the value of winding inductance is very small, which makes the current cannot be continued with the PWM control based on VSI, resulting in the large torque ripple. On the other hand, the armature reaction is so small that the effect to no-load magnetic field may be neglected. It is difficulties in motor flux weakening. The limitation of the DC-link voltage constrains the application of the motor that working at above the base speed. The other inverter topology is the current source inverter (CSI). It has the advantages of fast dynamic response, convenience generative braking, simple converter topology, inherent four-quadrant operation, natural shoot-through protection capability in motor drive applications. In addition, field-oriented control (FOC) schemes are widely employed to achieve improved system dynamics and reliability by controlling the flux and torque independently. A PWM CSI induction drive using GTOs was described by M. Hombu, S. Ueda, A. Ueda, and Y. Matsuda (1985). CSI drives for medium and high-power induction machines were studied by Y. Yin and A. Y. Wu (1998), V. D. Colli, P. Can-
celliere, F. Marignetti, and R. D. Stefano (2005), A. Weber, P. Kern, and T. Dalibor (2001), N.R. Zargari, S.C. Rizzo, Y. Xiao, H. Iwamoto, K. Satoh, and J. F. Donlon (2001). The phase angle current control algorithm of CSI for induction motor drive was proposed by A. Klonne and F.W. Fuchs (2003). An instantaneous current control method for CSI drives was proposed by M. H. Bierhoff and F. W. Fuchs (2009). The fieldoriented control method for CSI was studied by M. Salo and H. Tuusa, (2005), J.D. Ma, B. Wu, N. R. Zargari, and S. C. Rizzo (2001), L. A. C. Lops and M. F. Naguib (2010), D. Banerjee and V. T. Ranganathan (2009), A. R. Beig and V. T. Ranganathan (2006), where significant improvements have been achieved. CSI was used in the drive system of vehicle applications by A. R. Beig and V. T. Ranganathan, (2006), M. Qiu, Y. W. Li, B. Wu, D. Xu, N. Zargari, and Y. Liu, (2007), Z. Wu and G. Su, (2008), G. J. Su, L. Tang, and Z. Wu, (2009), which extended the constant-torque and constant-power operation regions through the optimization of the circuit topology, and the control algorithm, but the torque-output capability was decreased in the field-weakening region. In this paper, A CSI is being explored for the AFIPMSM drivers, and a bi-directional dc-dc converter on the primary side of the inverter was used in the system, it can be shown in Figure 2.
Figure 1. Basic structure and the wave of Back EMF
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This title is available in InfoSci-Journals, InfoSci-Journal Disciplines Communications and Social Science. Recommend this product to your librarian: www.igi-global.com/e-resources/libraryrecommendation/?id=2
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Extended Speed Range Control of Axial Flux Ironless PMSM using Current-Source Inverter Xiaoyuan Wang, School of Electrical Engineering and Automation, Tianjin University, Tianjin, China Xiaoguang Wang, School of Electrical Engineering and Automation, Tianjin University, Tianjin, China Tao Fu, School of Electrical Engineering and Automation, Tianjin University, Tianjin, China
ABSTRACT Axial flux ironless permanent magnetic synchronous motor (AFIPMSM) is a new permanent magnetic motor. It has many advantages, such as little volume, low mass, low lost, high power density, no cogging torque, and the sinusoidal back EMF. It gradually becomes the good choice in drive system. However, because of the coreless structure and the long air gap, the winding inductance is small, which causes the current is not continued with the PWM control based on VSI. On the other hand, the armature reaction is so small that it is difficulties to weakening flux. The motor only be working under the base speed. To solve this problem, a novel speed control strategy to operate a current source inverter (CSI) driven AFIPMSM. And a modified dc-dc converter is used to boost the voltage of DC-link, which can extend the operating ranges of speed. Simulation and experimental results confirm the validity of the proposed control method. Keywords:
Automatic Control Strategy of Torque, Buck Converter, Current Source Inverter (CSI), Disc Coreless, Permanent Magnet Synchronous Motor (PMSM)
1. INTRODUCTION Axial flux ironless permanent magnetic synchronous motor (AFIPMSM) have the advantages of high power density, small size, high overload capability, efficiency, no cogging torque and reluctance torque (Wang Xiaoyuan, Chen Jing, Guo Yu, 2009; Xiaoyuan Wang,
Jingjuan Du, 2006). The AFIPMSM with onestator-two-rotor is shown in Figure 1. Outer rotor is applied in this motor. Nd-Fe-B permanent material and Halbach array is applied to the permanent material. The magnetic field of one side is increased, the other side is decreased. The flux density in circumferential direction is approximate sinusoidal distribution, which
DOI: 10.4018/ijapuc.2013070102 Copyright © 2013, IGI Global. Copying or distributing in print or electronic forms without written permission of IGI Global is prohibited.
International Journal of Advanced Pervasive and Ubiquitous Computing, 5(3), 14-22, July-September 2013 15
makes the motor’s back-EMF is sinusoidal. The waveformof no-load back EMF is shown in Figure 1 (b). Although the AFIPMSM has more than a series of advantages,but as the coreless structure and the long air gap, the value of winding inductance is very small, which makes the current cannot be continued with the PWM control based on VSI, resulting in the large torque ripple. On the other hand, the armature reaction is so small that the effect to no-load magnetic field may be neglected. It is difficulties in motor flux weakening. The limitation of the DC-link voltage constrains the application of the motor that working at above the base speed. The other inverter topology is the current source inverter (CSI). It has the advantages of fast dynamic response, convenience generative braking, simple converter topology, inherent four-quadrant operation, natural shoot-through protection capability in motor drive applications. In addition, field-oriented control (FOC) schemes are widely employed to achieve improved system dynamics and reliability by controlling the flux and torque independently. A PWM CSI induction drive using GTOs was described by M. Hombu, S. Ueda, A. Ueda, and Y. Matsuda (1985). CSI drives for medium and high-power induction machines were studied by Y. Yin and A. Y. Wu (1998), V. D. Colli, P. Can-
celliere, F. Marignetti, and R. D. Stefano (2005), A. Weber, P. Kern, and T. Dalibor (2001), N.R. Zargari, S.C. Rizzo, Y. Xiao, H. Iwamoto, K. Satoh, and J. F. Donlon (2001). The phase angle current control algorithm of CSI for induction motor drive was proposed by A. Klonne and F.W. Fuchs (2003). An instantaneous current control method for CSI drives was proposed by M. H. Bierhoff and F. W. Fuchs (2009). The fieldoriented control method for CSI was studied by M. Salo and H. Tuusa, (2005), J.D. Ma, B. Wu, N. R. Zargari, and S. C. Rizzo (2001), L. A. C. Lops and M. F. Naguib (2010), D. Banerjee and V. T. Ranganathan (2009), A. R. Beig and V. T. Ranganathan (2006), where significant improvements have been achieved. CSI was used in the drive system of vehicle applications by A. R. Beig and V. T. Ranganathan, (2006), M. Qiu, Y. W. Li, B. Wu, D. Xu, N. Zargari, and Y. Liu, (2007), Z. Wu and G. Su, (2008), G. J. Su, L. Tang, and Z. Wu, (2009), which extended the constant-torque and constant-power operation regions through the optimization of the circuit topology, and the control algorithm, but the torque-output capability was decreased in the field-weakening region. In this paper, A CSI is being explored for the AFIPMSM drivers, and a bi-directional dc-dc converter on the primary side of the inverter was used in the system, it can be shown in Figure 2.
Figure 1. Basic structure and the wave of Back EMF
Copyright © 2013, IGI Global. Copying or distributing in print or electronic forms without written permission of IGI Global is prohibited.
7 more pages are available in the full version of this document, which may be purchased using the "Add to Cart" button on the product's webpage: www.igi-global.com/article/extended-speed-range-control-ofaxial-flux-ironless-pmsm-using-current-sourceinverter/100435?camid=4v1
This title is available in InfoSci-Journals, InfoSci-Journal Disciplines Communications and Social Science. Recommend this product to your librarian: www.igi-global.com/e-resources/libraryrecommendation/?id=2
Related Content Mobile Novelty Mining Agus T. Kwee and Flora S. Tsai (2009). International Journal of Advanced Pervasive and Ubiquitous Computing (pp. 43-68).
www.igi-global.com/article/mobile-novelty-mining/41704?camid=4v1a Dynamic and Secure Business Data Exchange Model for SaaS-based Collaboration Supporting Platform of Industrial Chain Shuying Wang, Jizi Li and Shihua Ma (2011). International Journal of Advanced Pervasive and Ubiquitous Computing (pp. 46-59).
www.igi-global.com/article/dynamic-secure-business-dataexchange/64317?camid=4v1a Ubiquitous Services and Business Processes Alistair Barros (2010). Ubiquitous and Pervasive Computing: Concepts, Methodologies, Tools, and Applications (pp. 1688-1719).
www.igi-global.com/chapter/ubiquitous-services-businessprocesses/37875?camid=4v1a
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www.igi-global.com/chapter/basics-ubiquitousnetworking/37785?camid=4v1a
