Results 241 to 250 of about 5,304,242 (286)
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Three-phase sigma-delta modulation using zero-sequence components
2005 European Conference on Power Electronics and Applications, 2005This paper presents new analytic results on the performance of sigma-delta modulated (SDM) three-phase voltage source inverters, in terms of harmonic distortion of output current, conduction and switching losses of the inverter devices, and rms current of the DC link capacitor. The results are compared with the same magnitudes for PWM.
A. Mertens, V. Ganesan
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A novel method for preventing mal-operation of the zero-sequence directional component
12th IET International Conference on AC and DC Power Transmission (ACDC 2016), 2016Zero-sequence directional components of the healthy line would incorrectly discriminate the fault direction, causing mal-operation of the pilot zero-sequence directional protection, due to the influence of mutual inductance between lines under weak current and strong magnetic situations.
H.Y. Xu +4 more
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IEEE Transactions on Power Electronics, 2015
This paper develops an online interturn fault diagnosis method for permanent magnet synchronous machine (PMSM). The mathematical model of the PMSM with interturn fault is established. The zero-sequence voltage component and zero-sequence current component are analyzed in the PMSM, respectively.
Jianzhong Zhang, Ming Cheng, Jun Hang
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This paper develops an online interturn fault diagnosis method for permanent magnet synchronous machine (PMSM). The mathematical model of the PMSM with interturn fault is established. The zero-sequence voltage component and zero-sequence current component are analyzed in the PMSM, respectively.
Jianzhong Zhang, Ming Cheng, Jun Hang
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Torque Improvement of Dual Three-Phase Permanent Magnet Machine Using Zero Sequence Components
IEEE Transactions on Magnetics, 2017This paper investigates the interaction of the zero sequence component into both permanent magnet (PM) shape and phase current to improve the output torque in dual three-phase surface-mounted PM (SPM) machines. The optimal zero sequence components are analytically derived and validated by finite element (FE) analyses.
Zhu, Zi-Qiang, Kai Wang
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Equivalent Modeling Method for Components with Independent Zero-Sequence Paths
2024 7th International Conference on Mechatronics and Computer Technology Engineering (MCTE)Yuanhong Lu
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IEEE Transactions on Power Electronics, 2019
Owing to the operational characteristic of a Vienna rectifier, it is found that the traditional modulation method would result in the current distortion. This paper, therefore, proposes a novel zero-sequence component injection modulation method for improving the input quality of the Vienna rectifier with balanced or unbalanced dc-link voltages.
Feng Gao, Zhang Chenghui, Bin Duan
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Owing to the operational characteristic of a Vienna rectifier, it is found that the traditional modulation method would result in the current distortion. This paper, therefore, proposes a novel zero-sequence component injection modulation method for improving the input quality of the Vienna rectifier with balanced or unbalanced dc-link voltages.
Feng Gao, Zhang Chenghui, Bin Duan
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A Unified SVM Algorithm for Multilevel Converter and Analysis of Zero Sequence Voltage Components
IECON 2006 - 32nd Annual Conference on IEEE Industrial Electronics, 2006Space vector modulation (SVM) is widely used in three phase converters. This paper presents a novel SVM algorithm in three phase coordinate system which is very simple to implement. In this algorithm, the role of the zero sequence component in SVM is studied, and the switching states and duty ratios are calculated straightforwardly without vector ...
Wang Chenchen, null Li Yongdong, Xiao Xi
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A New Fault Line Selection Method Based on Zero-Sequence Active Component
2010 International Conference on Electrical and Control Engineering, 2010a new fault line selection method based on the elimination of unbalanced current of zero-sequence active power is proposed by analyzing the principle of active power method and its inaccuracy. The amplitude and phase of real zero-sequence currents can be calculated by the method and the effect of unbalanced current is eliminated.
Wang Chonglin +3 more
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A general SVM algorithm for multilevel converters considering zero-sequence component control
31st Annual Conference of IEEE Industrial Electronics Society, 2005. IECON 2005., 2005Space vector modulation (SVM) scheme plays a significant role in high-voltage high-power applications of multilevel converters for its good performance. This paper presents a novel general SVM algorithm for multilevel converters. It includes two parts: one is control of fundamental component of three-phase outputs corresponding to reference vector; the
null Yongdong Li +2 more
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2007 7th International Conference on Power Electronics and Drive Systems, 2007
A minimization problem for the instantaneous active and reactive currents give the optimal solution for the three-wire three-phase systems. This basic solution is simple to implement, but posing practical issues when it is applied to a four-wire three-phase system.
E. Pashajavid +2 more
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A minimization problem for the instantaneous active and reactive currents give the optimal solution for the three-wire three-phase systems. This basic solution is simple to implement, but posing practical issues when it is applied to a four-wire three-phase system.
E. Pashajavid +2 more
openaire +1 more source