Comparative Evaluation of 800V DC-Link Three-Phase Two/Three-Level SiC Inverter Concepts for Next-Generation Variable Speed Drives

2020 ◽  
Author(s):  
Davide Cittanti ◽  
Mattia Guacci ◽  
Spasoje Miric ◽  
Radu Bojoi ◽  
Johann W. Kolar
Keyword(s):  
Comparative Evaluation ◽  
Variable Speed ◽  
Next Generation ◽  
Variable Speed Drives ◽  
Three Phase

scholarly journals Systematic Implementation of Multi-Phase Power Supply (Three to Six) Conversion System

Electronics ◽  
2019 ◽  
Vol 8 (1) ◽  
pp. 109 ◽  
Author(s):  
Rashid Al-Ammari ◽  
Atif Iqbal ◽  
Amith Khandakar ◽  
Syed Rahman ◽  
Sanjeevikumar Padmanaban
Keyword(s):  
Phase Transformation ◽  
Phase Difference ◽  
Power Supply ◽  
Phase System ◽  
Variable Speed ◽  
Variable Speed Drives ◽  
Pulse Input ◽  
Wind Energy Generation ◽  
Three Phase ◽  
Multi Phase

Multiphase (more than three) power system has gained popularity due to their inherent advantages when compared to three-phase counterpart. Multiphase power supply is extensively used in AC/DC multi-pulse converters, especially supply with multiple of three-phases. AC/DC converter with multi-pulse input is a popular solution to reduce the ripple in the DC output. Single-phase and three-phase transformers and phase transformation from single to multiphase are employed in variable speed drives application to feed the multi-cell H-Bridge converters and multi-pulse AC-DC converters. Six-phase system is extensively discussed in the literature for numerous applications ranging from variable speed drives to multiphase wind energy generation system. This paper shows the systematic phase transformation technique from three-phase to six-phase (both symmetrical and asymmetrical) for both understanding and teaching purposes. Such an approach could help students understand a promising advanced concept in their undergraduate courses. When phase difference between the two consecutive phases of six phases has a phase difference of 60, it is called a symmetrical six-phase system; while an asymmetrical or quasi, six-phase has two set of three-phase with a phase shift of 30 between the two sets. Simulation and experimental results are also presented.

scholarly journals Analysis and performance evaluation of a three-phase sparse neutral point clamped converter for industrial variable speed drives

2021 ◽  
Author(s):  
Davide Cittanti ◽  
Mattia Guacci ◽  
Spasoje Mirić ◽  
Radu Bojoi ◽  
Johann Walter Kolar
Keyword(s):  
Degrees Of Freedom ◽  
Performance Comparison ◽  
Neutral Point ◽  
Modulation Scheme ◽  
Phase System ◽  
Variable Speed ◽  
Variable Speed Drives ◽  
Chip Area ◽  
Three Phase ◽  
Clamped Converter

Abstract This paper analyzes the operation and characterizes the performance of a three-phase three-level (3-L) Sparse Neutral Point Clamped converter (SNPCC) for industrial variable speed drives (VSDs). The operating principle of the SNPCC, which advantageously employs a lower number of power transistors than a conventional 3-L inverter, is described in detail, focusing on the AC-side differential-mode and common-mode voltage formation and on the DC-side mid-point current generation processes. The degrees of freedom in the SNPCC modulation scheme are defined and several switching sequences are investigated. Afterwards, the stresses on the active and passive components (e.g. semiconductor losses, machine phase current ripple, DC-link capacitor RMS current, etc.) are calculated by analytical and/or numerical means, enabling a straightforward performance comparison among the identified switching sequences. The most suited modulation strategy for VSD applications is then selected and a chip area sizing procedure, aimed at minimizing the total semiconductor chip size, is applied to a 800V 7.5kW three-phase system. The performance limits of the designed SNPCC are evaluated and finally compared to the ones of conventional 2-L and 3-L solutions, highlighting the promising cost/performance trade-off of the analyzed topology.

scholarly journals Characteristic and Non-Characteristic Harmonics, Harmonic Cancellations and Relevant International Standards in Variable Speed Drives

2002 ◽  
Vol 7 (1) ◽  
pp. 123
Author(s):  
Syed M. Islam
Keyword(s):  
Single Phase ◽  
Supply Voltage ◽  
International Standards ◽  
Wave Form ◽  
Variable Speed ◽  
Variable Speed Drives ◽  
Front End ◽  
Three Phase ◽  
Research Findings ◽  
Voltage Wave

This paper will present a review of characteristic harmonics in both single phase and three phase drive front end rectifiers, discuss recent research findings in identifying sources and production of non-characteristic harmonics and amplification of harmonic levels when the front end rectifiers are fed from non-ideal supply conditions. Significant amount of triplens may be generated due to unbalances in utility supply voltage wave form and anticipated harmonic levels may vary widely. The paper will also discuss international harmonic standards such as the AS 2279, IEEE 519, and IEC 61000 series applicable to rectifier loads. Finally, the paper will present techniques to reduce harmonic levels by mixing of single phase and three phase non-linear loads resulting from mutual cancellations.  

Опыт использования частотных преобразователей на объектах ООО «Водоканал»

2020 ◽  
Author(s):  
Sergei, Rybel’ ◽  
V. Kuninin ◽  
S. Gerasimov ◽  
A. Bakushin
Keyword(s):  
Inrush Current ◽  
Electric Motors ◽  
Variable Speed ◽  
Variable Speed Drives ◽  
Technical Device ◽  
Advantages And Disadvantages ◽  
Subsequent Period ◽  
Pumping Stations ◽  
Current Water ◽  
Pumping Equipment

Приведен опыт применения частотно-регулируемых электроприводов на насосных станциях ООО Водоканал г. Новокузнецка. Приводятся преимущества и недостатки данного технического устройства. Показано, что в настоящее время использование частотно-регулируемых приводов позволило снизить потребление электроэнергии более чем на 20, уменьшить затраты на ремонт и обслуживание, повысить срок службы электродвигателей, уменьшить величину пускового тока, снизить утечки воды и нагрузку на насосное оборудование и трубопроводную арматуру. Применение частотно-регулируемых электроприводов оправдало себя и в тех случаях, когда требуется регулирование параметров для обеспечения технологии (регулирование скорости, производительности и т. д.), приведение параметров оборудования к требуемым значениям без его замены (в расчете на увеличение загрузки оборудования до номинала в последующий период), компенсация суточной неравномерности потребления воды.The experience of using variable speed drives at the pumping stations operated by Vodokanal LLC in Novokuznetsk is presented. The advantages and disadvantages of this technical device are specified. It is demonstrated that currently, the use of variable speed drives provides for reducing the energy consumption by more than 20, reducing the repair and maintenance costs for improving the service life of electric motors for reducing inrush current, water leaks and the load on the pumping equipment and pipeline valving. The use of variable speed drives has paid off even in case where adjusting the parameters to ensure the technology (velocity, performance, etc.) bringing the equipment parameters to the required values without replacing it (in order to increase the equipment load to the nominal value for the subsequent period) compensating for daily irregularities in water consumption are required.

Adjustable frequency invertors and their application to variable-speed drives

1964 ◽  
Vol 10 (11) ◽  
pp. 389 ◽  
Author(s):  
D.A. Bradley ◽  
C.D. Clarke ◽  
R.M. Davis ◽  
D.A. Jones
Keyword(s):  
Variable Speed ◽  
Variable Speed Drives

scholarly journals Common-Mode Voltage Harmonic Reduction in Variable Speed Drives Applying a Variable-Angle Carrier Phase-Displacement PWM Method

Energies ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2929
Author(s):  
Abraham Marquez Alcaide ◽  
Vito Giuseppe Monopoli ◽  
Xuchen Wang ◽  
Jose I. Leon ◽  
Giampaolo Buticchi ◽  
...  
Keyword(s):  
Carrier Phase ◽  
Harmonic Distortion ◽  
Harmonic Spectrum ◽  
Hydraulic Systems ◽  
Variable Speed ◽  
Common Mode ◽  
Variable Speed Drives ◽  
Phase Displacement ◽  
Common Mode Voltage ◽  
External Component

Electric variable speed drives (VSD) have been replacing mechanic and hydraulic systems in many sectors of industry and transportation because of their better performance and reduced cost. However, the electric systems still face the issue of being considered less reliable than the mechanical ones. For this reason, researchers have been actively investigating effective ways to increase the reliability of such systems. This paper is focused on the analysis of the common-mode voltage (CMV) generated by the operation of the VSDs which directly affects to the lifetime and reliability of the complete system. The method is based on the mathematical description of the harmonic spectrum of the CMV depending on the PWM method implementation. A generalized PWM method where the carriers present a variable phase-displacement is developed. As a result of the presented analysis, the CMV reduction is achieved by applying the PWM method with optimal carrier phase-displacement angles without any external component and/or passive filtering technique. The optimal values of the carrier phase-displacement angles are obtained considering the minimization of the CMV total harmonic distortion. The resulting method is easily implementable on mostly off-the-shelf mid-range micro-controller control platforms. The strategy has been evaluated in a scaled-down experimental setup proving its good performance.

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