On the Effects of Position Sensor Resolution in Variable Speed Drives

Author(s):  
Giacomo Scelba ◽  
Giulio De Donato ◽  
Giuseppe Scarcella ◽  
Fabio Giulii Capponi
Author(s):  
Sergei, Rybel’ ◽  
V. Kuninin ◽  
S. Gerasimov ◽  
A. Bakushin

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.


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

Energies ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2929
Author(s):  
Abraham Marquez Alcaide ◽  
Vito Giuseppe Monopoli ◽  
Xuchen Wang ◽  
Jose I. Leon ◽  
Giampaolo Buticchi ◽  
...  

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.


2021 ◽  
Vol 185 ◽  
pp. 116483
Author(s):  
Lucas A. Militão ◽  
Caio D. Fernandes ◽  
Diego dos Santos ◽  
Douglas M. Machado ◽  
Marcelo L. Heldwein ◽  
...  

2012 ◽  
Vol 59 (6) ◽  
pp. 2484-2494 ◽  
Author(s):  
Sisuda Chaithongsuk ◽  
Babak Nahid-Mobarakeh ◽  
Jean-Paul Caron ◽  
Noureddine Takorabet ◽  
Farid Meibody-Tabar

Energies ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2530 ◽  
Author(s):  
Luigi Cimorelli ◽  
Carmine Covelli ◽  
Bruno Molino ◽  
Domenico Pianese

Greenhouse gas emission is one of the main environmental issues of today, and energy savings in all industries contribute to reducing energy demand, implying, in turn, less carbon emissions into the atmosphere. In this framework, water pumping systems are one of the most energy-consuming activities. The optimal regulation of pumping systems with the use of variable speed drives is gaining the attention of designers and managing authorities. However, optimal management and operation of pumping systems is often performed, employing variable speed drives without considering if the energy savings are enough to justify their purchasing and installation costs. In this paper, the authors compare two optimal pump scheduling techniques, optimal regulation of constant speed pumps by an optimal ON/OFF sequence and optimal regulation with a variable speed pump. Much of the attention is devoted to the analysis of the costs involved in a hypothetical managing authority for the water distribution system in order to determine whether the savings in operating costs is enough to justify the employment of variable speed drives.


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