Modelling and fault-tolerant control of 5-phase induction machine

Rolak, Michal; Seng, Hang; Malinowski, Mariusz

doi:10.1515/bpasts-2015-0113

Cited by 9 publications

(7 citation statements)

References 22 publications

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“…The further development requires research on fault management, intelligent modularization, and the possibility of reconfiguration on the fly [34,[45][46].…”

Section: Discussionmentioning

confidence: 99%

Cascaded multilevel converters in recent research and applications

Malinowski

2017

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. Multilevel converters have been intensively investigated and developed since 1960s and have found successful industrial applications. The aim of this paper is to present state of the art as well as recent research and applications of cascaded multilevel converters, which are a very interesting solution for power distribution systems and renewable energy sources. Cascaded multilevel converters can easily operate at medium and high voltage based on the series connection of power modules (cells), which use standard low-voltage component configurations. Series connections of modules (cells) allow for high quality output voltages and input currents, reduction of passive components and availability of component redundancy. Due to these features the cascaded multilevel converters have been recognized as attractive solutions for high-voltage direct-current (HVDC) transmission, solid state transformers (SST) and photovoltaic (PV) systems.Key words: multilevel converters, cascaded converters, modular multilevel converters, modulation, solid state transformer, photovoltaic systems. Cascaded multilevel converters in recent research and applications M. MALINOWSKIInstitute of Control and Industrial Electronics, Warsaw University of Technology, 75 Koszykowa St., 00-662 Warsaw, Poland for multilevel structures. Among the main benefits one may count a superior harmonic spectrum for a given switching frequency, a lower dv/dt stress at the converter terminals, cables and end windings of transformers/generators, a lower common mode voltage, and substantially lower semiconductor switching losses, particularly at medium to higher switching frequencies. A three-level topology is also a highly competitive alternative to the two-level structure in terms of cost, efficiency, and weight/size [2].The final choice of converter topology for RES depends on type of application, expected power, reliability demand and price. Three-phase multilevel converters, e.g. three-level neutral point clamped (3L-NPC) [3][4][5][6], three-level transistor clamped (3L-TCC) [4] or five-level active neutral point clamped (5L-ANPC) [7][8][9] are most popular in high power applications. However, 3L-NPC converters may be considered even in power range of few hundreds kVA, which was discussed in [2].

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“…The further development requires research on fault management, intelligent modularization, and the possibility of reconfiguration on the fly [34,[45][46].…”

Section: Discussionmentioning

confidence: 99%

Cascaded multilevel converters in recent research and applications

Malinowski

2017

Bulletin of the Polish Academy of Sciences Technical Sciences

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“…n-phase inverter produces m=2 (4) In order to avoid calculation in case of large number of vectors used in drive, the n-phase modulator is proposed Its operation will involve converting a vector quantities from the n-phase coordinates to orthogonal coordinates and vice versa. In the literature [2,8] drive systems with multi-hysteresis current regulator are described (Fig. 2) Usually, the control system applies the speed control loop The speed controller generates a reference value component i qref of the current vector.…”

Section: Fig 1 Division Of Basic Vector Control Strategies Used In mentioning

confidence: 99%

“…In the last ten years in the literature describing the electrical drive systems, there are more and more publications related to n-phase systems, i.e. where the number of motor phases n > 3 [1][2][3][4]. Due to the number of phases n > 3, such motors cannot be powered directly from a 3-phase grid, but must be supplied with power by transistor converters on the number of branches equal to the number of motor phases.…”

Section: Introductionmentioning

confidence: 99%

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Structures of vector control of n-phase motor drives based on generalized Clarke transformation

Janaszek

2016

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. The paper presents vector control structures for n-phase AC motors derived from generalized Clarke transformation. In contrast to known works, where authors operate on generalized formulas of the Clarke transformation, in this work, only a number of actually used phases, of mostly industrial purposes, are considered (n = 5, 6, 2£3). This allows to perform control calculations in stationary orthogonal coordinates aβ or rotating dq. There are implementations of different control strategies: ROC (rotor-oriented control) or FOC (field-oriented control). Next, the paper presents the novel concept of a voltage modulator designed for multi-phase drive systems. Operation of the modulator is based on the extended Clarke transformation for multiphase systems. A mathematical model of the multiphase voltage modulator, operating in open-loop and closed-loop current control has been presented. Some selected oscillograms of voltage and current waveform, which illustrate properties of proposed control structures have been presented. Why multiphase drive systems?In the last years, more and more often there appear works devoted to multiphase drives. Most of them refer to drives with induction motors, but published there are also descriptions of drives with permanent, magnet-synchronous motors. Many works refer to drives with 5-phase, but also with 6-phase motors, and dual 3-phase motors. A work on drives with multiphase motors justifies the advantages of such motors, compared to 3-phase motors:• With the same nominal values of power and supply voltage, the nominal values of phase currents for an n-phase motor are reduced, as compared to a 3-phase one.• In transistor power converters, components of a smaller permissible collector current can be applied. This problem is important in high-power drives used in traction, metallurgy, mining transport, high-power pump drives, fans, and compressors [11,12].• In n-phase systems, the angle between the phases of the motor is smaller. When using direct torque control method, it is possible to accurately determine the position of the rotor.• In n-phase motors, there is a decrease in the amplitude of fluctuations of the torque, and an increase in their frequency (for a specified angular velocity of the rotor) [13].• By increasing the number of phases, the drive offers a greater robustness. It is possible to work with a damaged single phase in the motor or branch in the inverter [14].

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“…Another possibility is to use predictive fault tolerance control in [23]. In [24,25], a technique of reconfiguration of phase currents in a single-phase and two-phase open fault state is presented. In articles [26,27], fault-tolerant control for five-phase permanent magnet synchronous motors is presented.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Properties of a Five-Phase Induction Motor in the Introduction of New Fault-Tolerant Control

2022

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Multiphase electric motors in cooperation with power semiconductor converters belong to the future of electric drives. This is because of their better properties compared to three-phase motors, such as better fault tolerance. How a multiphase motor will behave in a fault state is very important when using such motors in EV and HEV. This is the basis of the research in this article; we investigate the options for operating a five-phase motor in a fault condition in order to improve the drive qualities during fault operation. The complete mathematical expressions of the five-phase induction motor model in the normal operation as well as in fault operation and also the control modification to improve the properties of the drive are presented. The new five-phase field-oriented control is next described, which improves the drive qualities in four-phase operation and is the first fundamental aspect of the study. Another important aspect of the project is the development of a specific control on a real motor, followed by measurements of properties of a five-phase motor in normal and fault operation of one phase without and with control modification to enhance drive characteristics. The qualities and appropriateness of employing a five-phase motor as a drive in EV and HEV are then determined by comparing these results. Finally, a comparison of motor attributes is shown with and without control adjustment.

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Modelling and fault-tolerant control of 5-phase induction machine

Cited by 9 publications

References 22 publications

Cascaded multilevel converters in recent research and applications

Cascaded multilevel converters in recent research and applications

Structures of vector control of n-phase motor drives based on generalized Clarke transformation

Investigation of the Properties of a Five-Phase Induction Motor in the Introduction of New Fault-Tolerant Control

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