An Improved Open-Phase Fault-Tolerant DTC Technique for Five-Phase Induction Motor Drive Based on Virtual Vectors Assessment

Chikondra, Bheemaiah; Muduli, Utkal Ranjan; Behera, Ranjan Kumar

doi:10.1109/tie.2020.2992018

Cited by 69 publications

(31 citation statements)

References 33 publications

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“…Section 4.2 describes the input power characteristics for all conditions based on mechanical torque and constant engine speed. These waveforms (Figures [12][13][14] show that in the event of a one-phase failure, the nominal torque must be reduced by 22.86% in order to maintain the same input power as in normal operation. We reduced this to 12.86% for unbalanced currents and 8.58% for symmetrical currents by using fault-tolerant control.…”

Section: Discussionmentioning

confidence: 99%

“…This control technique is derived from the work [15] and the results of both works are compared. The torque ripple in [14] is approximately 1.6 Nm, whereas the torque ripple in the compared DTC control technique [15] is approximately 2.5 Nm. As a result, the ripple was reduced by 36%.…”

Section: Introductionmentioning

confidence: 99%

“…Recent studies on the fault tolerance of five-phase machines include [14], which used a five-phase induction motor with a power of 3.8 kW and was powered by a two-level VSI. As described in the article, the paper presents an improved direct torque control (DTC) technique based on virtual vector evaluation under open-phase failure conditions.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

2022

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“…Some criteria have also been included in the selection process within the look-up table to improve its performance in the low-speed region and an optimization between the two zero vectors to minimize the average switching frequency obtained [26]. On the other hand, and based on the virtual vectors defined in [23], different DTC schemes are presented defining new virtual vectors and avoiding the use of the zero vector to reduce the common-mode voltage generated by the VSI in [27,28], to improve open-phase fault operations in [29], or to avoid any reconfiguration of the controller when open-phase faults appear [30].…”

Section: Dtc In Five-phase Drivesmentioning

confidence: 99%

Performance Analysis of Direct Torque Controllers in Five-Phase Electrical Drives

et al. 2021

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The industrial application of electric machines has grown in the last decades, thanks to the development of microprocessors and power converters, which have permitted their use as variable-speed drives. Although three-phase machines are the common trend, the interest of the research community has recently focused on machines with more than three phases, known as multiphase machines. The principal reason lies in the exploitation of their advantages in terms of reliability, i.e., post-fault operating capability. Additionally, multiphase machines provide a better current distribution among phases, and lower current harmonic production in the power converter, than conventional three-phase machines. However, multiphase drive applications require the development of complex controllers to regulate the torque (or speed) and flux of the machine. In this regard, direct torque controllers have appeared as a viable alternative due to their easy formulation and high flexibility to incorporate control objectives. However, these controllers face some peculiarities and limitations in their use that require attention. This work aims to tackle direct torque control as a viable alternative for the regulation of multiphase drives. Special attention will be paid to the development of the control technique and the expected benefits and limitations in the obtained results. Case examples based on symmetrical five-phase induction machines with distributed windings in the motoring mode of operation will be used to this end.

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“…and are especially suitable for intelligent electric vehicles, aerospace driving, etc. [1][2][3][4][5]. For example, in the electric vehicle driving system, it is required to provide large torque at low speed and a wide speed range, and the MIM can meet the requirements by using the pole-changing strategy, which is both efficient and convenient [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Electronic Pole-Changing Strategy with Cosine-Response for Multiphase Induction Motor Based on PR Controller

Jia

Yang

2021

J. Electr. Eng. Technol.

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The multiphase induction motor (MIM) suffers the problems of unsmoothness and slow dynamic response during the process of electronic pole-changing. To solve this issue, a cosine-response strategy based on proportional resonance (PR) current controller is proposed. Firstly, a current switching strategy with cosine-response is designed, which makes the MIM work more smoothly while switching between two planes. Then, the PR controller based on static coordinate system is adopted to replace the traditional proportional integral current loop controller, which realizes the zero steady-state error tracking of the current and improves MIM's dynamic response. Experiments on a five-phase induction motor verify that the proposed strategy can reduce the fluctuations of the torque, speed, and total harmonic distortion of phase current. Besides, it can improve the dynamic response of the torque and speed when the pole-changing is switched.

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An Improved Open-Phase Fault-Tolerant DTC Technique for Five-Phase Induction Motor Drive Based on Virtual Vectors Assessment

Cited by 69 publications

References 33 publications

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

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

Performance Analysis of Direct Torque Controllers in Five-Phase Electrical Drives

Electronic Pole-Changing Strategy with Cosine-Response for Multiphase Induction Motor Based on PR Controller

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