Six-phase Permanent Magnet Synchronous Generator Research Articles

Modeling and Simulation of Marine Current Energy Conversion System with Six-Phase Permanent Magnet Synchronous Generator

Modeling and Simulation of Marine Current Energy Conversion System with Six-Phase Permanent Magnet Synchronous Generator

Design and Characteristic Investigation of Novel Dual-Stator V-Shaped Magnetic Pole Six-Phase Permanent Magnet Synchronous Generator for Wind Power Application

This paper describes the characteristic investigation of the Novel Dual-stator V-Shape Magnetic Pole Six-Phase Permanent Magnet Synchronous Generator (NDSVSMPSP-PMSG) for wind power application. The proposed generator has V-shaped embedded magnetic pole in the rotor and six-phase winding in both the stator. The proposed generator has high-power density and high efficiency. For emphasizing the significance of the proposed generator, the characteristics of the NDSVSMPSP generator are analyzed and compared to one of the traditional generators, i.e., the Dual-stator Surface Mounted Six-Phase Permanent Magnet Synchronous Generator (DSSMSP-PMSG). For the design and characteristic investigation of both the generator, Finite Element Method (FEM) is chosen because of its high accuracy. Two modes of FEM analysis are considered, namely magneto-statics and transients. The magneto static analysis is used for the study of flux line and flux density distribution, while the transient analysis is considered for the generator’s characteristic investigation. The performance characteristics such as generated Electromotive Force (EMF) for both inner and outer stator, Percentage Total Harmonic Distortion (THD) of developed voltage, Developed EMF vs rpm, terminal voltage vs. current, developed rotor torque vs time, percent (%) ripple content in torque, and percent efficiency vs current for both generators are investigated. As a result, it can be stated that the power density and reliability of the proposed generator is higher than that of the traditional generator.

Two Novel Open-End Winding Multilevel Unidirectional Six-Phase Rectifiers With Reduced Switch Count

In this article, two new unidirectional multilevel six-phase power rectifier topologies are proposed and investigated. Such topologies may be applied to ac–dc systems such as wind energy conversions systems, aerospace generator drives, telecommunications or any other application where regenerative operation is either not required or prohibited. The first topology is composed of two three-level neutral-point-clamped (NPC) converters connected to the open-end windings of a six-phase permanent magnet synchronous generator, and a three-phase noncontrolled diode bridge converter. The second topology is composed of three modified NPC converters with the substitution of two controlled switches by diodes in each leg. The use of a noncontrolled converter with diodes aims to reduce the controlled switches count, the system complexity, and the costs. However, it makes both systems nonreversible. The system models, operating principles, the space vector pulsewidth modulation strategies, the dc-links balance, and the control system to ensure the elimination of the zero-crossover distortion caused by the use of the diodes are presented. Due to the high number of levels generated, the systems are suitable for high power applications with voltage and current ratings restrictions. A study concerning harmonic distortion and semiconductor losses for both systems is performed, in order to be compared with a standard configuration. The feasibility of the system is demonstrated by simulation and experimental results.

Design of a six‐phase asymmetrical permanent magnet synchronous generator for wind energy applications

The electromagnetic design of a six-phase permanent magnet synchronous generator (PMSG) for application in medium/high-speed wind energy conversion systems (WECS) is studied in this work. The dynamic model and the analytical design process of the six-phase PMSG are presented and some design aspects, such as the winding configuration and the geometry of the permanent magnets are discussed in order to improve the performance of the generator in both healthy and fault-tolerant conditions, i.e. when only one set of three-phase windings is connected to the grid. Finally, several simulation results obtained through finite element analysis are presented in order to validate the proposed design.

Optimal Design of Six-phase Permanent Magnet Synchronous Generator for directdrive Small-Scale Wind Turbines

Permanent Magnet (PM) generators are widely employed in directly coupled wind turbines. Therefore, optimal design of these generators is quite necessary to improve their overall performance. In this paper, single/multi-objective design optimization of six-phase permanent magnet synchronous generator (PMSG) for directly coupled wind turbines is carried out. The studied PM generator in this paper is the radial-flux surface mounted PM generator. The aim of optimal design is to reduce the cost of PMSG manufacturing and generator losses. For this purpose, the main equations of PM generator design are extracted. Therefore, the generator design steps are developed and then imperialist competitive algorithm is used to optimize the design variables of the generator. To find the best design for this generator, the cost and losses, separately, are optimized and are then optimized simultaneously. Finally, the optimum results are presented. Comparison between optimum results shows that simultaneous optimization of the cost and losses leads to suitable design for PM wind generator.

Eliminating the Third Harmonic Effect for Six Phase Permanent Magnet Synchronous Generators in One Phase Open Mode

To insure stable operation and eliminate twice torque ripple, a topology for a six phase permanent magnet synchronous generator (SP-PMSG) with a neutral point connected together was analyzed in this paper. By adopting an extended transformation matrix, the mathematic model of the space vector control was established. The voltage and torque equations were deduced while considering the third harmonic flux and inductance. In addition, the suppression third harmonic method and the closed loop control strategy were proposed. A comparison analysis indicates that the cooper loss minimum method and the current magnitude minimum method can meet different application requirements. The voltage compensation amount for each of the methods was deduced which also takes into account the third harmonic effect. A simulation and experimental result comparison validates the consistency through theoretical derivation. It can be seen that all of the two control strategies can meet the requirements of post-fault.