Low-Speed Control Improvements for a Two-Level Five-Phase Inverter-Fed Induction Machine Using Classic Direct Torque Control

Gao, Long; Fletcher, John; Zheng, Libo

doi:10.1109/tie.2010.2070775

Cited by 104 publications

(65 citation statements)

References 18 publications

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“…Thus, it becomes necessary to eliminate the magnitude of the x-y components. In the proposed DTC control strategies, the x-y stator flux elimination algorithm is implemented [15].…”

Section: Three-level Five-phase Dtcmentioning

confidence: 99%

“…The researches presented up to now emphasizes that the selection of ±72º displaced voltage vectors gives the best dynamic response and helps in improving the performance of five-phase induction motor [13]- [15]. Therefore, when the stator flux lies in sector-I, the voltage vector V 3 is the best suitable voltage vector for rapidly incrementing the torque and flux.…”

Section: Selection Of the Voltage Vectormentioning

confidence: 99%

“…This process of demagnetization continues in DTC-III. This demagnetization causes the torque ripple to be increased when compared to DTC-II [11], [15]. Therefore, due to the slow flux and torque response when compared to DTC-II, DTC-III gives an increased torque ripple.…”

Section: Selection Of the Voltage Vectormentioning

confidence: 99%

“…The performance of the five-phase IM in the low speed region is also significantly improved by using the DTC technique. In order to reduce the demagnetization effect, when the motor runs at a low speed, the classic DTC algorithm has been modified so that the ±72º displaced voltage vectors are replaced with ±36º displaced voltage vectors [15]. Predictive Torque Control (PTC) has been introduced as an alternative to DTC [16], where torque ripple minimization, x-y component elimination and improvements in the speed response have been achieved.…”

Section: Introductionmentioning

confidence: 99%

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Selection of Voltage Vectors in Three-Level Five-Phase Direct Torque Control for Performance Improvement

Tatte¹,

Aware²

2016

Journal of Power Electronics

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This paper presents a Direct Torque Control (DTC) strategy for the five-phase induction motor driven by a three-level five-phase inverter in order to improve the performance of the five-phase induction motor. In the proposed DTC technique, only 22 voltage vectors out of 243 available voltage vectors in a three-level five-phase inverter are selected and are divided in 10 sectors each with a width of 36º. The four different DTC combinations (DTC-I, II, III and IV) for a three-level five-phase induction motor drive are investigated for improving the performance of five-phase induction motor. All four of the DTC strategies utilize a combination of the same large and zero voltage vectors, but with different medium voltage vectors. Out of these four techniques, DTC-II gives the best performance when compared to the others. This DTC-II technique is analyzed in detail for improvements in the performance of five-phase induction motor in terms of torque ripple, x-y stator flux and Total Harmonics Distortion (THD) of the stator phase current when compared to its two-level counterparts. To verify the effectiveness of the proposed three-level five-phase DTC control strategy, a DSP based experimental system is build. Simulation and experimental results are provided in order to validate the proposed DTC technique.

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“…Thus, it becomes necessary to eliminate the magnitude of the x-y components. In the proposed DTC control strategies, the x-y stator flux elimination algorithm is implemented [15].…”

Section: Three-level Five-phase Dtcmentioning

confidence: 99%

Section: Selection Of the Voltage Vectormentioning

confidence: 99%

Section: Selection Of the Voltage Vectormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Selection of Voltage Vectors in Three-Level Five-Phase Direct Torque Control for Performance Improvement

Tatte¹,

Aware²

2016

Journal of Power Electronics

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“…In the modified lookup table based DTC technique selection of the voltage vector depends on the position of flux in the auxiliary (xy) subspace. DTC is also considered for fivephase machines in [14], [15]. A virtual voltage vector technique, which is similar to the modified lookup table based technique, is proposed in [15], where the problem of flux reduction at low speeds is also addressed.…”

Section: Introductionmentioning

confidence: 99%

Direct Torque Control Scheme for a Six-Phase Induction Motor With Reduced Torque Ripple

Pandit

Aware

Nemade

et al. 2017

IEEE Trans. Power Electron.

135

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Levi, E, Aware, MV, Pandit, JK and Nemade, R Direct torque control scheme for a six-phase induction motor with reduced torque ripple http://researchonline.ljmu.ac.uk/4731/ Article LJMU has developed LJMU Research Online for users to access the research output of the University more effectively. Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Users may download and/or print one copy of any article(s) in LJMU Research Online to facilitate their private study or for non-commercial research. You may not engage in further distribution of the material or use it for any profit-making activities or any commercial gain.The version presented here may differ from the published version or from the version of the record. Please see the repository URL above for details on accessing the published version and note that access may require a subscription.For more information please contact researchonline@ljmu.ac.uk http://researchonline.ljmu.ac.uk/ Citation (please note it is advisable to refer to the publisher's version if you intend to cite from this work) AbstractThis paper presents an improved direct torque control (DTC) method for an asymmetrical six-phase induction motor using a two-level six-phase inverter. As is well-known, a simple extension of three-phase direct torque control technique to an asymmetrical six-phase motor, using large vectors only, introduces significant current harmonics of the order 6n±1 (n = 1,3,5,…), which are mapped into the non-flux/torque producing (xy) plane. These harmonics cause only losses in the motor winding as they do not take part in torque production. Hence a number of different improved DTC techniques have been developed in the past for multiphase motor drives. The paper takes one such DTC method as the starting point and improves it further by using the concept of virtual voltage vectors. Developed vector selection algorithm, based on two virtual voltage vectors, requires the information on position of the flux in the auxiliary (xy) subspace and provides stator current quality commensurate with the currently available best DTC algorithm for six-phase drives. However, use of two virtual voltage vectors enables a substantial reduction of the torque ripple, which is achieved by means of a five-level torque comparator. Extensive experimentation is performed and it is shown that the reduction of the current harmonics is in essence almost the same as in another recently developed DTC scheme, based on the use of a single virtual voltage vector. However, the achieved torque ripple reduction, which is verified experimentally, makes the scheme superior when compared to the existing approaches. At the same time, developed scheme retains qualities of conventional DTC schemes, such as simple structure and fast response. Its additional beneficial feature is the easiness of implementation.

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Five‐Phase Induction Motor Drive System

2021

High Performance Control of AC Drives With MATLAB®/Simulink

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Low-Speed Control Improvements for a Two-Level Five-Phase Inverter-Fed Induction Machine Using Classic Direct Torque Control

Cited by 104 publications

References 18 publications

Selection of Voltage Vectors in Three-Level Five-Phase Direct Torque Control for Performance Improvement

Selection of Voltage Vectors in Three-Level Five-Phase Direct Torque Control for Performance Improvement

Direct Torque Control Scheme for a Six-Phase Induction Motor With Reduced Torque Ripple

Five‐Phase Induction Motor Drive System

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