scholarly journals Modeling and Diagnostic of Permanent Magnet Synchronous Machine under Insulation Failure Condition

2021 ◽  
Vol 2 (2) ◽  
pp. 86-95
Author(s):  
BOUCHAREB CHOUROUK ◽  
NAIT-SAID MOHAMED-SAID ◽  
LAHMER FETHI
Keyword(s):  
Frequency Analysis ◽  
Short Circuit ◽  
Electric Circuit ◽  
Diagnostic Techniques ◽  
Permanent Magnet Synchronous Machine ◽  
Failure Condition ◽  
Equivalent Electric Circuit ◽  
Insulation Failure ◽  
Short Circuit Fault ◽  
Electric Circuit Model

One of the most frequent faults in PMSM stator is the turn-to-turn short-circuit fault. So, the aim of this paper is to present a dynamic model for PMSM with turn-to-turn short-circuit fault based on equivalent electric circuit model. Two simple and useful diagnostic techniques ESA an EPVA based on frequency analysis are applied to detect this kind of fault. The accuracy of diagnosis is based on adding the real waveform of back-EMF.

GA-based approach to optimize an equivalent electric circuit model of a Li-ion battery-pack

2021 ◽  
Vol 172 ◽  
pp. 114647
Author(s):  
Victor Pizarro-Carmona ◽  
Sandra Castano-Solís ◽  
Marcelo Cortés-Carmona ◽  
Jesus Fraile-Ardanuy ◽  
David Jimenez-Bermejo
Keyword(s):  
Electric Circuit ◽  
Circuit Model ◽  
Battery Pack ◽  
Li Ion Battery ◽  
Equivalent Electric Circuit ◽  
Li Ion ◽  
Electric Circuit Model

scholarly journals A Building Energy Management System Based on an Equivalent Electric Circuit Model

Energies ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1689 ◽  
Author(s):  
Giovanni Bianco ◽  
Stefano Bracco ◽  
Federico Delfino ◽  
Lorenzo Gambelli ◽  
Michela Robba ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Energy Management ◽  
Heat Pump ◽  
Electric Circuit ◽  
Building Energy ◽  
Equivalent Electric Circuit ◽  
Geothermal Heat ◽  
Building Energy Management ◽  
Geothermal Heat Pump ◽  
Electric Circuit Model

In recent decades, many EU and national regulations have been issued in order to increase the energy efficiency in different sectors and, consequently, to reduce environmental pollution. In the building sector, energy efficiency interventions are usually based on the use of innovative insulated materials and on the installation of cogeneration and tri-generation units, as well as solar technologies. New and retrofitted buildings are more and more commonly being called “smart buildings”, since they are characterized by the installation of electric and thermal power generation units, energy storage systems, and flexible loads; the presence of such technologies determines the necessity of installing Building Energy Management Systems (BEMSs), which are used to optimally manage their operation. The present paper proposes a BEMS for a smart building, equipped with plants based on renewables (photovoltaics, solar thermal panels, and geothermal heat pump), where the heating and cooling demand are satisfied by a Heating, Ventilation and Air Conditioning System (HVAC) fed by a geothermal heat pump. The developed BEMS is composed of two different modules: an optimization tool used to optimally manage the HVAC plant, in order to guarantee a desired level of comfort inside rooms, and a simulation tool, based on an equivalent electric circuit model and used to evaluate the thermal dynamic behavior of the building. The paper describes the two modules and shows the main results of the validation phase that has been conducted on a real test-case represented by the Smart Energy Building (SEB) located at the Savona Campus of the University of Genoa, Italy.

scholarly journals Frequency Analysis of Partial Short-Circuit Fault in BLDC Motors with Combined Star-Delta Winding

Energies ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 196
Author(s):  
Mariusz Korkosz ◽  
Bartłomiej Pakla ◽  
Jan Prokop
Keyword(s):  
Mathematical Model ◽  
Permanent Magnet ◽  
Frequency Analysis ◽  
Diagnostic Method ◽  
Short Circuit ◽  
Stator Winding ◽  
Permanent Magnet Motor ◽  
Voltage Signal ◽  
Short Circuit Fault ◽  
Short Circuit Condition

This paper analyses the condition of a partial short-circuit in a brushless permanent magnet motor. Additionally, the problem was analysed for three stator winding configurations: star, delta and star-delta connection. The paper presents an original mathematical model allowing a winding configurations to be analysed. What is more, the said mathematical model allows taking account of the partial short-circuit condition. Frequency analysis (Fast Fourier Transform—FFT) of the artificial neutral point voltage was proposed for the purpose of detecting the partial short-circuit condition. It was demonstrated that a partial short-circuit causes a marked increase in the diagnostic frequencies of the voltage signal. The proposed brushless permanent magnet motor diagnostic method is able to detect the fault regardless of the stator winding configuration type.

scholarly journals Elastic MCF Rubber with Photovoltaics and Sensing on Hybrid Skin (H-Skin) for Artificial Skin by Utilizing Natural Rubber: Third Report on Electric Charge and Storage under Tension and Compression

Sensors ◽  
2018 ◽  
Vol 18 (6) ◽  
pp. 1853 ◽  
Author(s):  
Kunio Shimada
Keyword(s):  
Solar Cell ◽  
Natural Rubber ◽  
Electric Charge ◽  
Natural Rubber Latex ◽  
Electric Circuit ◽  
Equivalent Electric Circuit ◽  
Rubber Latex ◽  
Tension And Compression ◽  
And Storage ◽  
Electric Circuit Model

In the series of studies on new types of elastic and compressible artificial skins with hybrid sensing functions, photovoltaics, and battery, we have proposed a hybrid skin (H-Skin) by utilizing an electrolytically polymerized magnetic compound fluid (MCF) made of natural rubber latex (NR-latex). By using the experimental results in the first and second reports, we have clarified the feasibility of electric charge at irradiation, and that without illumination under compression and elongation. The former was explained in a wet-type MCF rubber solar cell by developing a tunneling theory together with an equivalent electric circuit model. The latter corresponds to the battery rather than to the solar cell. As for the MCF rubber battery, depending on the selected agent type, we can make the MCF rubber have higher electricity and lighter weight. Therefore, the MCF rubber has an electric charge and storage whether at irradiation or not.

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