A Family of Random PWM Algorithms for Reduction of Torque Ripple and Current Harmonics of Direct Torque Controlled Open End Winding Induction Motor

Satheesh, G.; Reddy, T. Bramhananda; SaiBabu, Ch.

doi:10.1007/s40313-013-0105-3

Cited by 3 publications

(2 citation statements)

References 14 publications

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“…However, for this system to be applied correctly, the following parameters must be adjusted: the gains of the observer matrix, and gains of the controller in the loop state estimation. In this work, simulations results are presented to validate the proposed approach as other recent papers in literature (Satheesh et al 2014;Branco et al 2013).…”

Section: Introductionmentioning

confidence: 85%

Differential Evolution Applied to DTC Drive for Three-Phase Induction Motors Using an Adaptive State Observer

Costa

Angélico

Goedtel

et al. 2015

J Control Autom Electr Syst

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This paper describes an application of the metaheuristic differential evolution in the drive of three-phase induction motors based on direct torque control and employs a Luenberger observer to estimate the stator flux linkage and rotor speed. In this context, the differential evolution is applied to adjust the gains of the controllers involved in the direct torque control and speed observer estimation loop, as well as the observer matrix. Firstly a proportional-integral controller with anti-windup is considered in speed control loop, whose gains are adjusted empirically and optimally by DE. Furthermore, differential evolution is also considered for optimizing the Luenberger observer parameters for stator current and flux, as well as rotor speed estimation. Simulation tests are presented in order to prove the effectiveness of the proposed method.

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Section: Introductionmentioning

confidence: 85%

Differential Evolution Applied to DTC Drive for Three-Phase Induction Motors Using an Adaptive State Observer

Costa

Angélico

Goedtel

et al. 2015

J Control Autom Electr Syst

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show abstract

“…The control by conventional PWM control techniques of a grid-tied inverter also leads to the issue of carrier frequency and sideband harmonics [20]. These sideband harmonics are minimized by the Random PWM technique [21][22][23][24]. The Random PWM is achieved with random carrier frequency RCF PWM where the carrier frequency is varied over a range.…”

Section: Introductionmentioning

confidence: 99%

A random carrier frequency PWM technique with a narrowband for a grid-connected solar inverter

et al. 2020

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The quality of power is always a concern for the high penetration of a grid-connected solar photovoltaic (PV) system due to the variation in solar irradiation and the temperature change of solar output, which in turn varies the fundamental component of power delivered to the grid. A solar source requires an inverter interface to supply the AC load as well as for the grid interconnection. Any reduction in the fundamental component generated by solar PV at a lower irradiation level or at hightemperature results in increasing %THD at the output of inverter for a given fixed switching frequency since harmonics due to PWM technique is comparable with the fundamental component. The selection of high-fixed-switching-frequency PWM reduces harmonics but increases the stress on switches and switching losses. It also suffers from issues of harmonics at carrier frequency and its sideband at multiples of switching frequency that causes acoustic noise and EMI. The random frequency PWM (Random PWM) method overcomes these issues presented by the fixed-frequency PWM method. However, a wide band of Random PWM makes the inverter filter design difficult and causes resonance in the distribution system. In addition, asymmetry in the carrier wave introduces even-order harmonics in the line current. Hence, this paper proposes a narrowband random frequency PWM method to reduce sideband harmonics, lower-order harmonics, even-order harmonics and a total harmonic distortion (THD) for a solar-based grid-connected inverter. Simulation results present a satisfactory performance of the proposed control technique for a steady-state and transient results. Experimental validation of the same is carried out on the OPAL-RT OP4500-based laboratory prototype of a 2-kVA inverter which depicts reduction in harmonics and hence improvement in power quality. KeywordsGrid-connected inverter • Harmonics • Linear control • Random PWM • Solar inverter B Rajendrasinh Jadeja

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An Investigation on the Performance of Random PWM Controlled Converters

Jadeja

Ved

Chauhan

2015

Eng. Technol. Appl. Sci. Res.

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This paper provides an insight on various random pulse width modulation techniques and their effect on spreading the harmonic spectrum for various applications like drives, hybrid electric vehicles and renewable energy sources, for two level as well as three level inverter. Acoustic noise reduction, electromagnetic interference conducted and torque ripple are obvious advantages of random pulse width modulation (PWM). PWM converters with multilevel topology can meet with global quality standards for power supplies. The random PWM technique provides additional advantages. Among others, it may be implemented to achieve switching loss equalization in power switches for cascaded H-Bridge multilevel inverters. This paper provides in depth understanding for different random PWM techniques and their applications.

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A Family of Random PWM Algorithms for Reduction of Torque Ripple and Current Harmonics of Direct Torque Controlled Open End Winding Induction Motor

Cited by 3 publications

References 14 publications

Differential Evolution Applied to DTC Drive for Three-Phase Induction Motors Using an Adaptive State Observer

Differential Evolution Applied to DTC Drive for Three-Phase Induction Motors Using an Adaptive State Observer

A random carrier frequency PWM technique with a narrowband for a grid-connected solar inverter

An Investigation on the Performance of Random PWM Controlled Converters

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