Assessment of Torque Density Improvement by Third Harmonic Injection in Five-Phase Induction Machine with Full Pitch Concentrated and Distributed Winding

Design and modelling of three‐to‐five phase three‐limbed transformer

“…Thus, the turn ratio of each secondary coil of the ith secondary phase are solutions of Equation (10), which are given by Equation (11). Therefore, the winding corresponding to turn ratio matrix obtained from the resolution of Equation (10), satisfies the requirements of current condition and the Equation (6).…”

“…Consequently, another determination method has been presented in ref. [29] by the introduction of Equations ( 5) and (6), which results in a unique configuration for a given transformation ratio and a given phase shift angle. However, the proposed calculation method is complex and cannot be generalized to obtain solutions for 3-tom phase transformation [29], since this method requires solving a linear system with ill-conditioned matrix, which has to be improved by row transformations [29].…”

“…Since the beginning of this century, the research on electrical multiphase systems has witnessed a significant development, as a result of their properties and advantages that make them suitable for applications requiring high power, high reliability, and improved fault tolerance. The multiphase drives have been the subject of intense research on torque density improvement by current harmonic injection, control strategies using different converter types, fault tolerance, and parameter identification [1][2][3][4][5][6][7][8]. In addition, the possibilities of using multiphase systems have been explored in the field of electric power generation and transmission [9][10][11][12][13].…”