Fault-tolerant operation of a nine-phase induction machine with open phases

Souza, Tamires Santos de; Bastos, Rodrigo R.; Filho, Braz J. Cardoso

doi:10.1109/ias.2017.8101830

Cited by 14 publications

(5 citation statements)

References 20 publications

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“…This makes the proposed reconfiguration method superior to other fault tolerant techniques presented in the literature. [20][21][22][23][24]…”

Section: Under Fault Conditionsmentioning

confidence: 99%

“…The fault-tolerant operation of nine-phase machines with different optimization techniques and different inverter topologies has been presented in References 16-23. Different current control techniques are discussed for nine-phase machines under the fault condition of either one or more phases, 21 where the rotating magnetic field of the machine is maintained constant under normal and a fault condition. The mathematical modeling and control of nine-phase IMD with different fault conditions are discussed in References 22.…”

mentioning

confidence: 99%

“…However, these schemes have limitations with respect to the control complexity and loss associated with the healthy phases. In literature, [20][21][22][23][24] a simple postfault strategy is proposed for multiphase machines, that is, where the machine windings are arranged as the multiple numbers of threephase windings groups. Suppose a fault occurs in any one of the group phase windings.…”

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confidence: 99%

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Operational strategy ofnine‐phaseinduction machine under theopen‐switchfault condition

Kummari

Ramaiah

Keerthipati

2021

Int Trans Electr Energ Syst

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Multiphase induction machines are getting more attention in industry and academia because of their advantages and need for electric vehicles as well as ship propulsion. In this case, more number of power electronics devices are required due to higher number of phases. Moreover, in comparison with electromechanical systems, the probability of failure in power electronic inverter switches will be high. A fault in a semiconductor switch, without any proper alleviating methods, may result in the failure of the entire drive. To improve the reliability of induction motor drives (IMD), there is a necessity to enhance the postfault operation of the inverters. In this article, the proposed nine‐phase IMD incorporates simple mathematical equations and less circuit reconfigurations to work under conditions of open‐switch fault in either a single switch or the inverter's entire leg. This enables the drive to achieve balanced steady‐state operation with minimal deration in output power/torque under the fault conditions. In addition, alternative operational technique, which modulates the healthy phases of fault phase group with 50% duty ratio and minimal circuit reconfiguration, is discussed in this article. Moreover, all possible fault conditions and associated reconfiguration details of the drive are described in detail. To validate the proposed concepts, finite element method analysis is performed using ANSYS Maxwell, and experimentation is performed in the laboratory for both normal and fault conditions on nine‐phase IMD.

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“…This makes the proposed reconfiguration method superior to other fault tolerant techniques presented in the literature. [20][21][22][23][24]…”

Section: Under Fault Conditionsmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Operational strategy ofnine‐phaseinduction machine under theopen‐switchfault condition

Kummari

Ramaiah

Keerthipati

2021

Int Trans Electr Energ Syst

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“…The nine-phase IM used in this paper was designed and a built-in partnership between UFMG and Werner Eggon Geraldo (WEG) corporation to support Ph.D. and M.Sc. research projects [23,24,31,33,34]. Owing to this initial application, this electric motor was designed to operate at a highrated speed with a frequency of 240 Hz.…”

Section: Electrical Powertrain Characteristicsmentioning

confidence: 99%

“…These advantages are better discussed below: Reliability : If one or few phases of a motor or converter stop working, it would be desirable that the driver would be able to take the vehicle, at least, to the closest parking area. Nine‐phase motors are able to work in this condition [23, 26, 33, 34]. Torque increase : It is possible to improve the torque capability by injection of third harmonic currents in nine‐phase IM without neutral conductor connection [23, 26].…”

Section: Introductionmentioning

confidence: 99%

Nine‐phase IM for hybridisation of a compact vehicle by parallel TTR architecture

Silva

Pujatti²,

Pires³

2018

IET Electric Power Applications

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This study investigates the usage of a nine-phase induction motor (IM) in internal combustion engine vehicle hybridisation. Aiming to minimise structural changes, the parallel-through-the-road (TTR) hybrid architecture was chosen. First, a real vehicle was experimented on the mobility technology centre Federal University of Minas Gerais (CTM-Universidade Federal de Minas Gerais (UFMG) laboratory) to get its characteristics. After that, this technical information was used to model and simulate on the software advanced vehicle simulator (ADVISOR). The simulated model results were compared with the experimental tests results realised with the vehicle on the tests track and CTM-UFMG. Posteriorly, through a validated vehicle model, a drivetrain powered by a prototype of a nine-phase IM was integrated into the rear axle to do the hybridisation process simulation. To do that some structures modifications were necessary on ADVISOR since this tool does not include the parallel-TTR architecture. Vehicles modelled were simulated using the urban driving dynamometer schedules. Finally, the comparative analyses of simulation results show the improvements in fuel consumption, vehicle efficiency, emission gas, and the nine-phase motor operation in a hybrid TTR.

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