List of Articles three-phase

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  1 - Dual-Output Rectifier-Inverter System for Independently Supplying Two Three-Phase Loads
  M. Heydari A. Yazdian Varjani M. Mohamadian
  In this paper a rectifier-inverter system including a three phase diode rectifier and a dual output inverter is proposed for independently supplying two three-phase loads. This system employs less number of semiconductor devices compared to former dual output inverters More

  In this paper a rectifier-inverter system including a three phase diode rectifier and a dual output inverter is proposed for independently supplying two three-phase loads. This system employs less number of semiconductor devices compared to former dual output inverters proposed in the literature and uses only six active switches for controlling two three-phase loads. Reducing the number of switches and hence drive and control circuits and also cooling system may result in a reduction in overall cost of the system, may reduce its semiconductor power loss and as a result increases efficiency and reliability especially in applications with low and medium voltage and power ratings. The new configuration is introduced and its carrier-based PWM schemes are developed. Analysis of sizing of the DC link capacitors is also performed so as to minimize the DC link voltage ripple, to reduce the value of DC link capacitors and to improve the grid current THD and the grid current balance. Furthermore, loss profile of the system is studied and the results are compared with counterpart topologies. Simulation and experimental results are presented to verify the authenticity of the theoretical model. Manuscript profile
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  2 - Simulation of Electrical Fault in Stator Winding of Permanent Magnet Synchronous Motor and Discriminating It from Other Possible Electrical Faults Using Probabilistic Neural Network
  M. Taghipour-gorjikolaie S. M. Razavi M. A. Shamsi-Nejad
  One of the most common electrical faults in Permanent Magnet Synchronous Motor (PMSM) is inter-turn fault in stator winding. At the incipient steps it seems not dangerous and so light, but spreading this fault can leads to irreparable Consequences. In this paper, the in More

  One of the most common electrical faults in Permanent Magnet Synchronous Motor (PMSM) is inter-turn fault in stator winding. At the incipient steps it seems not dangerous and so light, but spreading this fault can leads to irreparable Consequences. In this paper, the intelligent system is presented to protect PMSMs from this kind fault. At the first, intelligent protection system determine the condition of the motor (which can be: Normal, Phase-phase short circuit, Open circuit and Inter-turn fault conditions). If the system determines the faults then send an alarm to operator and also if the fault is inter-turn, it can determine the damaged phase. Obtaining results show that Probabilistic Neural Network can be the most reliable and robust protection system for PMSMs against internal faults, especially inter-turn faults. Manuscript profile
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  3 - 3D Finite Element Analysis of MV Three-Phase Transformer Mechanical Forces Effected by Inrush Current Based on a Novel Winding Structure
  A. Nasiri A. Ranjbar F.  Faghihi S.  Soleymani
  Transient mechanical force in transformer induced critical mechanical stress on windings and transformers in radial and axial directions. In this paper, impact of force’s within transient inrush current duration on MV three phase transformer with propose novelty windin More

  Transient mechanical force in transformer induced critical mechanical stress on windings and transformers in radial and axial directions. In this paper, impact of force’s within transient inrush current duration on MV three phase transformer with propose novelty winding configuration (S-P-S) to considered. In order to forces analysis, a 3-D model of three phase transformer developed by use Ansoft Maxwell V15.0. Magnetic vector potential, Magnetic flux density and electro-mechanical force’s of SPS-type and conventional-type of configuration windings and transformer calculated from a 3D finite element model. Based on the comparison and result analysis, proposed an optimal configuration for transformer winding in order to trade-off and minimization of electromechanical force’s in the transient inrush current state. Manuscript profile
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  4 - Investigating the three-phase to five-phase time converter using a special transformer connection
  Ali  Bahadran Seyed Majid  Keshavarz
  The first five-phase induction motor drive systems were proposed in the late 1970s for variable speed drive applications. Since then, considerable research efforts have been devoted to identifying the development of commercially feasible multiphase propulsion systems. S More

  The first five-phase induction motor drive systems were proposed in the late 1970s for variable speed drive applications. Since then, considerable research efforts have been devoted to identifying the development of commercially feasible multiphase propulsion systems. Since the three-phase supply is available from the network, it is necessary to remove a static phase conversion system to obtain a multi-phase supply from the existing three-phase supply. Therefore, this paper presents a new transformer connection scheme to convert a three-phase network power supply into a five-phase constant voltage and constant frequency supply. The proposed transformer connection gives a five-phase output and therefore, can be used in applications that require a five-phase power supply. Currently, the five-phase motor drive is commercially viable. The five-phase transmission system solution can be further explored as an efficient solution for bulk power transmission. The connection scheme is explained using simulation and experimental approach to prove the feasibility. The geometry of the manufactured transformer is explained in this article. Manuscript profile