Multiphase machines are often chosen due to their enhanced fault tolerance. Six-phase ones especially convenient because they may be fed by off-the-shelf three-phase converters. In particular, those with symmetrical windings offer superior postfault capabilities. On the other hand, estimation of stator resistance is important for purposes such as thermal monitoring and preserving control perfor...

Fault analysis is necessary to design a protection system and circuit breakers for power network. The multiphase new technology so very little work found the fault of contrary, unlike three-phase system. faults in seven-phase may be either symmetrical or non-symmetrical. A non-symmetrical requires studying sequence components using Fortescue transformation. In paper, has been analysed. For this...

Multi-phase motors and generators are regarded with great fault tolerance capability, especially on open-circuit faults. Various mathematics analytical methods applied for their control. In this paper, a fault-tolerant control strategy asymmetric phase current the faults arbitrary phases in six-phase PMSM (six-phase permanent magnetic synchronous motor, 6P-PMSM) system, is proposed better elect...

A general method for fault detection and isolation is proposed and applied to inverter faults in drives of electric vehicles. This method is based on a change-detection algorithm, which allows multiple fault indices to be combined for retrieving the most likely state of the drive. The drive topology under study is a six-leg inverter associated with a three-phase open-end winding machine. Due to...

Dasht-e-Arjan is a northeast trending graben located 65 km west of Shiraz. It was formed along active segments of the Korrehbas fault, perpendicularly to the Shahnesh in and Salamati anticlines. Oriented sampling from bordering fault planes and striations was carried out to evaluate the relative amounts of paleostress/strain needed to form the graben. Measurements of e-twins and c-axis of calci...

Most types of electrical machines such as Induction Motors (IMs) can be modeled by an equivalent 2-phase machine (d-q model). For instance a single-phase IM with two main and auxiliary windings can be modeled as an equivalent 2-phase IM. Also a faulty single-phase IM (single-phase IM under open-phase fault) can be modeled as an unbalanced 2-phase IM. This study confirms this concept by modeling...

In this paper, a fault-tolerant three-phase induction drive based on field-oriented control is studied, and an analytical approach proposed to elucidate the limitations of FOC in flux-torque regulation from controller perspective. With open-phase fault, disturbance terms appear reference frame degrade performance when operating d-q plane with DC quantities. addition, hardware reconfiguration, w...

In this paper, a hybrid system is performed with fault detection and diagnosis on multi-phase induction motor (IM). The proposed method of integrated Harris Hawk optimization (IHHO) gradient boosting decision trees (GBDT) thus called the GBDTI2HO method. Here, additional operators are included in paper to improve HHO’s search behaviour namely crossover mutation. Distorted waveforms generated by...