Torque ripple reduction technique with improved flux response for a direct torque control induction motor drive

Singh, Bhoopendra; Jain, Shailendra; Dwivedi, Sanjeet

doi:10.1049/iet-pel.2012.0121

Cited by 54 publications

(41 citation statements)

References 24 publications

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“…On other hand, there exist solutions that still use switching tables: such as the modified switching table, which incorporates large number of non-zero active voltage vectors [14]. Another strategy consists on synthesizing two vector selection tables, arranged considering bus-clamping technique [15].…”

Section: Introductionmentioning

confidence: 99%

IM Direct Torque Control with no flux distortion and no static torque error

2015

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Section: Introductionmentioning

confidence: 99%

IM Direct Torque Control with no flux distortion and no static torque error

2015

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“…Modulation methods have been discussed to reduce the pulsating torque in induction motor drives such as space-vector modulation [3], [4], Advanced PWM techniques [5], [6] and vector-control [6]. The fundamental of the voltages applied by inverters generates the average output torque, and the harmonic voltages generate increased losses and torque pulsations.…”

Section: Introductionmentioning

confidence: 99%

Improved selective harmonic elimination for reducing torque harmonics of induction motors in wide DC bus voltage variations

Holagh

Najafabadi

Mahoor

2017

2017 North American Power Symposium (NAPS)

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Abstract-Conventionally, Selective Harmonic Elimination (SHE) method in 2-level inverters, finds best switching angles to reach first voltage harmonic to reference level and eliminate other harmonics, simultaneously. Considering Induction Motor (IM) as the inverter load, and wide DC bus voltage variations, the inverter must operate in both over-modulation and linear modulation region. Main objective of the modified SHE is to reduce harmonic torques through finding the best switching angles. In this paper, optimization is based on optimizing phasor equations in which harmonic torques are calculated. The procedure of this method is that, first, the ratio of the same torque harmonics is estimated, secondly, by using that estimation, the ratio of voltage harmonics that generates homogeneous torques is calculated. For the estimation and the calculation of the ratios motor parameter, mechanical speed of the rotor, the applied frequency, and the concept of slip are used. The advantage of this approach is highlighted when mechanical load and DC bus voltage variations are taken into consideration. Simulation results are presented under a wide range of working conditions in an induction motor to demonstrate the effectiveness of the proposed method.Index Terms--Induction motor drive, torque harmonics reduction, modified SHE PWM, various dc bus voltage, low switching frequency.

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“…Recently, many papers are dealing with the torque ripple reduction methods [7][8][9][10][11]. A torque ripple reduction method that aims to make the instantaneous torque equal with the reference value at the end of the cycle is researched.…”

Section: Introductionmentioning

confidence: 99%

Torque Ripple Reduction in Direct Torque Control of Five-Phase Induction Motor Using Fuzzy Controller with Optimized Voltage Vector Selection Strategy

Shin¹,

Kang²,

Lee³

2017

Journal of Electrical Engineering and Technology

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-This paper presents a torque ripple reduction method of direct torque control (DTC) using fuzzy controller with optimal selection strategy of voltage vectors in a five-phase induction motor. The conventional DTC method has some drawbacks. First, switching frequency changes according to the hysteresis bands and motor's speed. Second, the torque ripple is rapidly increased in long control period. In order to solve these problems, some/most papers have proposed torque ripple reduction methods by using the optimal duty ratio of the non-zero voltage vector. However, these methods are complicated in accordance with the parameter. If this drawback is eliminated, the torque ripple can be reduced compared with conventional method. In addition, the DTC can be simply controlled without the use of the parameter. Therefore, the proposed algorithm is changing the voltage vector insertion time by using the designed fuzzy controller. Also, the optimized voltage vector selection method is used in accordance with the torque error. Simulation and experimental results show effectiveness of the proposed control algorithm.

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Torque ripple reduction technique with improved flux response for a direct torque control induction motor drive

Cited by 54 publications

References 24 publications

IM Direct Torque Control with no flux distortion and no static torque error

IM Direct Torque Control with no flux distortion and no static torque error

Improved selective harmonic elimination for reducing torque harmonics of induction motors in wide DC bus voltage variations

Torque Ripple Reduction in Direct Torque Control of Five-Phase Induction Motor Using Fuzzy Controller with Optimized Voltage Vector Selection Strategy

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