Discontinuous Random Space Vector Modulation for Electric Drives: A Digital Approach

Khan, Hilal Musadiq; Miliani, El-Hadj; Drissi, Khalil El Khamlichi

doi:10.1109/tpel.2012.2194511

Cited by 61 publications

(26 citation statements)

References 24 publications

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“…In [17,18] several others modified SPWM schemes have been also proposed to reduce the common mode voltage. On the other hand, several random PWM techniques were proposed in [19][20][21]. Their basic concept is to randomize the modulation parameters with the aim to spread the harmonic spectrum around the switching frequency so that the generated noise remains under the EMI limits.…”

Section: Introductionmentioning

confidence: 99%

Comparative study of conventional modulation schemes in terms of conducted and radiated EMI generated by three-phase inverters

Salem¹,

Hamouda²,

Slama³

2017

Turk J Elec Eng & Comp Sci

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In this paper, a comparative study is carried out between the carrier (SPWM), third harmonic injection (THIPWM), and space vector (SVPWM) modulation schemes in terms of conducted (common and differential modes) and radiated electromagnetic interference (EMI) generated by three-phase two-level voltage source inverters. For this purpose, an experimental setup of the converter feeding an induction machine is developed with the aim to measure the conducted emission propagated back into the dc source and the radiated field in the vicinity of the power conversion device. Experimental results are given and analyzed in time and frequency domains. The comparative study between the three modulation methods carried out in the frequency domain shows that the SVPWM method has better EMI performance. Moreover, a high frequency model of the converter feeding the induction machine is simulated using SPICE-based simulation software. Good agreement is found between the experimental and simulation results in terms of conducted interferences.

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Section: Introductionmentioning

confidence: 99%

Comparative study of conventional modulation schemes in terms of conducted and radiated EMI generated by three-phase inverters

Salem¹,

Hamouda²,

Slama³

2017

Turk J Elec Eng & Comp Sci

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“…Reference [20] also uses a constant sampling frequency and adds a random time delay in each switching cycle. Discontinuous random space vector PWM method is also reported to reduce the switching losses using unsymmetrical clamping of phases [30]. In [9], [16], [17], new RPWM methods are proposed, which can avoid motor resonance frequencies in the selected carrier frequency range.…”

Section: Introductionmentioning

confidence: 99%

Variable-Switching Frequency PWM Technique for Induction Motor Drive to Spread Acoustic Noise Spectrum With Reduced Current Ripple

Kumar

Narayanan

2016

IEEE Trans. on Ind. Applicat.

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Pulse width modulation (PWM) of a motor drive at a fixed switching frequency leads to harmonic currents in narrow bands around integral multiples of the switching frequency, resulting in tonal frequency acoustic noise components which are irritating to the human ear. Random variation of carrier frequency to spread the spectrum poses challenges in device loss calculation, thermal design and closed-loop controller design. Random pulse positioning is not quite effective at high speeds of the drive, where the problem of acoustic noise is most pronounced. This paper proposes a simple variable frequency PWM and evaluates the performance of the same experimentally on a 6-kW induction motor drive. The experimental results show that the acoustic noise is spread uniformly over a range of frequencies without introducing low-frequency current harmonics. Compared to fixed frequency PWM, the dominant acoustic noise is reduced significantly over a wide range of speeds. The variable frequency PWM is further shown to reduce line current total harmonic distortion (THD) at high speeds of the drive. The computational effort required by the variable frequency PWM is only marginally higher than that required by fixed frequency PWM.

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“…Random PWM are carried out in various ways such as random switching frequency, random pulse position technique and random switching technique [10]. It was displayed that acoustic noise and EMI were suppressed by using random PWM technique in SVM algorithm [2]- [13], [15]- [16].…”

Section: Introductionmentioning

confidence: 99%

Reduction of EMI with Chaotic Space Vector Modulation in Direct Torque Control

Asker¹,

Özer²,

Kürüm³

2016

ElAEE

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In this paper a study is presented about the reduction of electromagnetic interference (EMI) in Direct Torque Control (DTC) method by the means of chaotic space vector modulation. Space Vector Modulated Direct Torque Control (SV-DTC) is a method developed to reduce current and moment fluctuations which stem from the hysteresis controllers used in classical DTC method. The switching frequency amplitude was changed chaotically in a Space Vector Modulated Direct Torque Control (FFSV-DTC) having a Fixed switching frequency, and Chaotic Space Vector Modulated Direct Torque Control (CAFSV-DTC) method having chaotic amplitude modulated switching frequency was obtained. CAFSV-DTC method was suggested to reduce EMI, acoustic noise and current harmonics which occur in FFSV-DTC method. For this purpose, the proposed CAFSV-DTC method, using a Permanent Magnet Synchronous Motor (PMSM) drive, is compared to Random Amplitude Frequency method (RSV-DTC) and FFSV-DTC. Simulation results indicate that the proposed method yields better results. Index Terms-Space vector pulse width modulation (SVM), electromagnetic interference (EMI), chaotic switching frequency, direct torque control (DTC).

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Discontinuous Random Space Vector Modulation for Electric Drives: A Digital Approach

Cited by 61 publications

References 24 publications

Comparative study of conventional modulation schemes in terms of conducted and radiated EMI generated by three-phase inverters

Comparative study of conventional modulation schemes in terms of conducted and radiated EMI generated by three-phase inverters

Variable-Switching Frequency PWM Technique for Induction Motor Drive to Spread Acoustic Noise Spectrum With Reduced Current Ripple

Reduction of EMI with Chaotic Space Vector Modulation in Direct Torque Control

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