Current optimization for a multi-phase machine under an open circuit phase fault condition

Zheng, Libo; Fletcher, John; Williams, B.W.

doi:10.1049/cp:20060142

Cited by 17 publications

(3 citation statements)

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“…The individual blocks were interconnected using mathematical blocks. An electrical model of the induction machine was created and described by Equations (11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30), and a mechanical model by Equations ( 31) and ( 32). The electrical model equation is in a dq reference frame.…”

Section: Modeling Of Five-phase Induction Motormentioning

confidence: 99%

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A Comprehensive Investigation of the Properties of a Five-Phase Induction Motor Operating in Hazardous States in Various Connections of Stator Windings

Kellner¹,

Kascak²,

Prazenica³

et al. 2021

Electronics

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This paper examines the properties of a multi-phase drive for EV (electric vehicles) and HEV (hybrid-electric vehicles) using a simulation model in the Matlab/Simulink environment and verifies the findings by experimental measurements on a real motor. The paper studies a five-phase induction motor, a suitable alternative for electric vehicles, due to its better properties such as better torque, smoother ripple, better fault tolerance, and the possibility of connecting stator windings to star, pentagon, and pentagram. The fundamentals of the article are to find out how this engine behaves in fault states, which can be called hazardous states. The paper presents a comprehensive evaluation of the decrease of mechanical power, torque, and power losses during motor operation without failure, in case of failure of one phase, and in case of failure of two adjacent phases and two non-adjacent phases, in different connections. In the simulations, the five-phase drive is powered from an ideal five-phase voltage source to verify the behavior of losses on the motor in fault conditions. Subsequently, the motor model is powered by a five-phase VSI, while the simulated waveforms are confirmed on a real motor, which is also powered by a five-phase VSI. The investigation results are the detection, which of the stator windings has better properties in the fault-free state and the case of fault states in operation. For which stator windings connection, it is most advantageous to design and dimension a five-phase induction motor.

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Section: Modeling Of Five-phase Induction Motormentioning

confidence: 99%

“…The paper [10][11][12] presents simulations of a five-phase induction motor connected to a pentagon and a pentacle with the motor running without a single phase. These posts state that the engine loses its original power but can work without problems.…”

Section: Introductionmentioning

confidence: 99%

A Comprehensive Investigation of the Properties of a Five-Phase Induction Motor Operating in Hazardous States in Various Connections of Stator Windings

Kellner¹,

Kascak²,

Prazenica³

et al. 2021

Electronics

View full text Add to dashboard Cite

show abstract

“…This distribution of the currents depends on the drive arrangement and the connection of the windings. Also, it depends on the optimization techniques that needed to be achieved post the fault beside maintain the MMF sinusoidal such as maximum torque, minimum losses, and minimum torque ripple [18]- [20]. It is worth saying here that the distribution of the stator current post the faults can be calculated offline using the mathematical model of the multi-phase machine.…”

mentioning

confidence: 99%

Control of 7-phase permanent magnet synchronous motor drive post three failures

Saleh

Sumner

2023

IJECE

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<span lang="EN-US">The article is introducing a new control technique for the 7-phase permanent magnet synchronous motor (PMSM) drive to enhance its robustness against the failure of phases ‘a’ and ‘c’ in addition to the failure of the encoder occurring simultaneously. The article is firstly developing a new multi-dimension space vector pulse width modulation (SVPWM) technique as a part of the fault-tolerant control technique (FTC) to control the magnitudes and angles of the motor’s current after the failures of phases ‘a’ and ‘c’. Moreover, the paper is developing another FTC to obtain a sensorless operation of the 7-phase motor after the failure in the encoder while the phase ‘a’ and ‘c’ are faulted based on the tracking of the saturation saliency. Simulation results prove that the ripple in the speed post the three failures was maintained to be less than 10 rpm compared to 2 rpm when the 7-phase drive is running without faults. In addition to that, the results demonstrated that the motor responded to instant changes in speeds and loads with a dynamic response very close to that obtained when the 7-phase motor ran under healthy operating conditions.</span>

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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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Current optimization for a multi-phase machine under an open circuit phase fault condition

Cited by 17 publications

References 0 publications

A Comprehensive Investigation of the Properties of a Five-Phase Induction Motor Operating in Hazardous States in Various Connections of Stator Windings

A Comprehensive Investigation of the Properties of a Five-Phase Induction Motor Operating in Hazardous States in Various Connections of Stator Windings

Control of 7-phase permanent magnet synchronous motor drive post three failures

Operational strategy ofnine‐phaseinduction machine under theopen‐switchfault condition

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