Analysis of Peak-to-Peak Current Ripple Amplitude in  Seven-Phase PWM Voltage Source Inverters

Grandi, Gabriele; Loncarski, Jelena

doi:10.3390/en6094429

Cited by 13 publications

(11 citation statements)

References 29 publications

(51 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In particular, the analysis of the output current ripple amplitude in three-phase 2L inverters has been recently introduced in [13][14][15]. The extension to 2L multiphase inverters is given in [16][17][18], and compared in [19], whereas the extension to 3L three-phase inverters is given in [20] and [21]. In general, the knowledge of peak-to-peak current ripple amplitude in inverter motor drives allows one to optimize the switching frequency (and the associated losses), handle and minimize the acoustic noise, and mitigate the electromagnetic interference [17,22].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Output Current Ripple in Single and Dual Three-Phase Inverters for Electric Vehicle Motor Drives

et al. 2015

Self Cite

View full text Add to dashboard Cite

Abstract:The standard solution for the traction system in battery powered electric vehicles (EVs) is a two-level (2L) inverter feeding a three-phase motor. A simple and effective way to achieve a three-level (3L) inverter in battery-supplied electric vehicles consists of using two standard three-phase 2L inverters with the open-end winding connection of standard three-phase ac motors. The 3L inverter solution can be usefully adopted in EVs since it combines several benefits such as current ripple reduction, increment of phase motor voltage with limited voltage ratings of the two battery banks, improvement in system reliability, etc. The reduction in current ripple amplitude is particularly relevant since it is a source of electromagnetic interference and audio noise from the inverter-motor power connection cables and from the motor itself. By increasing the inverter switching frequency the ripple amplitude is reduced, but the drive efficiency decreases due to the proportionally increased switching losses. In this paper the peak-to-peak ripple amplitude of the dual-2L inverter is evaluated and compared with the corresponding ripple of the single-2L inverter, considering the same voltage and power motor ratings. The ripple analysis is carried out as a function of the modulation index to cover the whole modulation range of the inverter, and the theoretical results are verified with experimental tests carried out by an inverter-motor drive prototype. OPEN ACCESSEnergies 2015, 8 3833

show abstract

Section: Introductionmentioning

confidence: 99%

Comparison of Output Current Ripple in Single and Dual Three-Phase Inverters for Electric Vehicle Motor Drives

et al. 2015

Self Cite

View full text Add to dashboard Cite

show abstract

“…The survey in this sub-section has so far been related to output current THD and ripple rms squared value, which are important in order to predict the additional losses that will take place in a drive due to the inverter switching. A rather different type of study, related to the output current ripple peak-to-peak value, has been reported recently in [67][68][69]. Peak-to-peak current ripple amplitude is analytically determined as a function of the modulation index in [67] for the seven-phase two-level VSI with space vector PWM control.…”

Section: Evaluation Of the Current And Voltage Qualitymentioning

confidence: 99%

“…A rather different type of study, related to the output current ripple peak-to-peak value, has been reported recently in [67][68][69]. Peak-to-peak current ripple amplitude is analytically determined as a function of the modulation index in [67] for the seven-phase two-level VSI with space vector PWM control. It has been found that the value is practically linearly dependent on the value of the modulation index in the linear region.…”

Section: Evaluation Of the Current And Voltage Qualitymentioning

confidence: 99%

Advances in Converter Control and Innovative Exploitation of Additional Degrees of Freedom for Multiphase Machines

Levi

2016

IEEE Trans. Ind. Electron.

563

238

View full text Add to dashboard Cite

AbstractMultiphase variable-speed drives and generation systems (systems with more than three phases) have become one of the mainstream research areas during the last decade. The main driving forces are the specific applications, predominantly related to the green agenda, such as electric and hybrid electric vehicles, locomotive traction, ship propulsion, 'more-electric' aircraft, remote offshore wind farms for electric energy generation, and general high-power industrial applications. As a result, produced body of significant work is substantial, making it impossible to review all the major developments in a single paper. This paper therefore surveys the recent progress in two specific areas associated with multiphase systems, namely power electronic supply control and innovative ways of using the additional degrees of freedom in multiphase machines for various nontraditional purposes.Index TermsMultiphase variable-speed drives, ac-ac converters, inverters, PWM, multiphase power electronics, integrated on-board battery chargers.

show abstract

“…Likewise, as the freedom degrees number increases, the vector control gives more possibilities: the study of the current harmonic injection for higher torque density keeping a smooth torque [20][21][22][23][24][25][26]; the enlargement, for traction machines working in flux-weakening mode under voltage saturation [27][28][29][30][31], of the area of working. Finally, multi-leg Voltage Source Inverters (VSI) [32,33] present also numerous PWM(Pulse Width Modulation) control strategies.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Optimized Control Strategies of a High-Speed Traction Machine with Five Phases and Bi-Harmonic Electromotive Force

et al. 2016

View full text Add to dashboard Cite

Abstract:The purpose of the paper is to present the potentialities in terms of the control of a new kind of PM synchronous machine. With five phases and electromotive forces whose first (E 1 ) and third (E 3 ) harmonics are of similar amplitude, the studied machine, so-called bi-harmonic, has properties that are interesting for traction machine payload. With three-phase machines, supplied by a mono-harmonic sinusoidal current, the weak number of freedom degrees limits the strategy of control for traction machines especially when voltage saturation occurs at high speeds. As the torque is managed for three-phase machines by a current with only one harmonic, flux weakening is necessary to increase speed when the voltage limitation is reached. The studied five-phase machine, thanks to the increase in the number of freedom degrees for control, aims to alleviate this fact. In this paper, three optimized control strategies are compared in terms of efficiency and associated torque/speed characteristics. These strategies take into account numerous constraints either from the supply (with limited voltage) or from the machine (with limited current densities and maximum acceptable copper, iron and permanent magnet losses). The obtained results prove the wide potentialities of such a kind of five-phase bi-harmonic machine in terms of control under constraints. It is thus shown that the classical Maximum Torque Per Ampere (MTPA) strategy developed for the three-phase machine is clearly not satisfying on the whole range of speed because of the presence of iron losses whose values can no more be neglected at high speeds. Two other strategies have been then proposed to be able to manage the compromises, at high speeds, between the high values of torque and efficiency under the constraints of admissible total losses either in the rotor or in the stator.

show abstract

Analysis of Peak-to-Peak Current Ripple Amplitude in Seven-Phase PWM Voltage Source Inverters

Cited by 13 publications

References 29 publications

Comparison of Output Current Ripple in Single and Dual Three-Phase Inverters for Electric Vehicle Motor Drives

Comparison of Output Current Ripple in Single and Dual Three-Phase Inverters for Electric Vehicle Motor Drives

Advances in Converter Control and Innovative Exploitation of Additional Degrees of Freedom for Multiphase Machines

Comparison of Optimized Control Strategies of a High-Speed Traction Machine with Five Phases and Bi-Harmonic Electromotive Force

Contact Info

Product

Resources

About