Pub Date : 2008-06-11DOI: 10.1109/SPEEDHAM.2008.4581188
C. Molfese, P. Schipani, M. Capaccioli, G. Sedmak, S. D'orsi
A last generation Survey Telescope requires a large amount of electromechanical actuators and sensors, completed with control electronics to make functioning not only the main axes to point and track the observed object, but a lot of subsystems as well, such as the Active Optics, the Probe, the Atmospheric Dispersion Corrector and the Hydraulic Bearings System. Each of them is based on different kinds of motors and transducers and related electronics, fulfilling the different subsystems requirements. Here the VST (VLT Survey Telescope) case is reported, giving a general overview of the main control electronics. The VST is a 2.6 m class Alt-Azimuthal Survey Telescope to be installed at Cerro Paranal in Northern Chile, at the European Southern Observatory (ESO) premises, one of the best observation sites worldwide. The VST Telescope was designed and realized by the I.N.A.F., Osservatorio Astronomico di Capodimonte. Nowadays its main structure has been already shipped to Chile, together with the Altitude and Azimuth axes control systems, meanwhile the subsystems controlling the two mirrors are still under completion in Naples.
{"title":"Survey Telescope control electronics","authors":"C. Molfese, P. Schipani, M. Capaccioli, G. Sedmak, S. D'orsi","doi":"10.1109/SPEEDHAM.2008.4581188","DOIUrl":"https://doi.org/10.1109/SPEEDHAM.2008.4581188","url":null,"abstract":"A last generation Survey Telescope requires a large amount of electromechanical actuators and sensors, completed with control electronics to make functioning not only the main axes to point and track the observed object, but a lot of subsystems as well, such as the Active Optics, the Probe, the Atmospheric Dispersion Corrector and the Hydraulic Bearings System. Each of them is based on different kinds of motors and transducers and related electronics, fulfilling the different subsystems requirements. Here the VST (VLT Survey Telescope) case is reported, giving a general overview of the main control electronics. The VST is a 2.6 m class Alt-Azimuthal Survey Telescope to be installed at Cerro Paranal in Northern Chile, at the European Southern Observatory (ESO) premises, one of the best observation sites worldwide. The VST Telescope was designed and realized by the I.N.A.F., Osservatorio Astronomico di Capodimonte. Nowadays its main structure has been already shipped to Chile, together with the Altitude and Azimuth axes control systems, meanwhile the subsystems controlling the two mirrors are still under completion in Naples.","PeriodicalId":345557,"journal":{"name":"2008 International Symposium on Power Electronics, Electrical Drives, Automation and Motion","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127764615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-06-11DOI: 10.1109/SPEEDHAM.2008.4581161
V. Chrisanov
The paper reports the computer simulation of transients during the induction motor (IM) start up at symmetrical and asymmetrical (unbalanced) voltage impressed. The investigation begins with clearing up the physical reason of the IM start-up transient origin and then proceeds to theoretical analysis of transient suppression methods. To suppress transient to a minimum magnitude the strategy of separate and sequential switching on the stator windings at favorable time instants to three phase mains is considered. Three possible schemes of the IM asymmetrical switching on are described, and then the mathematical modeling are carried out with help of differential equations in Cauchy form. Results of computer calculation are plotted with 3D sets of the transient currents and torques of the IM in terms of time and different phase angles of the voltage impressed.
{"title":"The induction motor start up with transient suppression","authors":"V. Chrisanov","doi":"10.1109/SPEEDHAM.2008.4581161","DOIUrl":"https://doi.org/10.1109/SPEEDHAM.2008.4581161","url":null,"abstract":"The paper reports the computer simulation of transients during the induction motor (IM) start up at symmetrical and asymmetrical (unbalanced) voltage impressed. The investigation begins with clearing up the physical reason of the IM start-up transient origin and then proceeds to theoretical analysis of transient suppression methods. To suppress transient to a minimum magnitude the strategy of separate and sequential switching on the stator windings at favorable time instants to three phase mains is considered. Three possible schemes of the IM asymmetrical switching on are described, and then the mathematical modeling are carried out with help of differential equations in Cauchy form. Results of computer calculation are plotted with 3D sets of the transient currents and torques of the IM in terms of time and different phase angles of the voltage impressed.","PeriodicalId":345557,"journal":{"name":"2008 International Symposium on Power Electronics, Electrical Drives, Automation and Motion","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129217220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-06-11DOI: 10.1109/SPEEDHAM.2008.4581255
J. Žák, Z. Peroutka
This contribution deals with the prototype of the main traction converter with medium frequency transformer for AC trolley wire fed locomotives. The attention is paid to the new master control and diagnostic unit. The designed master control unit has been programmed in the LabView development environment. This master unit ensures a human interface between a user and a digital signal processor. In this case, the master unit makes possible both control and diagnostic operations of the laboratory prototype of the traction converter. The master unit was tested by experiments performed on designed traction converter prototype of rated power of 12kW.
{"title":"Laboratory prototype of traction converter with medium-frequency transformer: Master control and diagnostic unit","authors":"J. Žák, Z. Peroutka","doi":"10.1109/SPEEDHAM.2008.4581255","DOIUrl":"https://doi.org/10.1109/SPEEDHAM.2008.4581255","url":null,"abstract":"This contribution deals with the prototype of the main traction converter with medium frequency transformer for AC trolley wire fed locomotives. The attention is paid to the new master control and diagnostic unit. The designed master control unit has been programmed in the LabView development environment. This master unit ensures a human interface between a user and a digital signal processor. In this case, the master unit makes possible both control and diagnostic operations of the laboratory prototype of the traction converter. The master unit was tested by experiments performed on designed traction converter prototype of rated power of 12kW.","PeriodicalId":345557,"journal":{"name":"2008 International Symposium on Power Electronics, Electrical Drives, Automation and Motion","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131358786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-06-11DOI: 10.1109/SPEEDHAM.2008.4581291
N. Giannoccaro, A. Messina, T. Sakamoto
The modelling and the control of the web handling systems have been studied for a long time; the correct modelling is necessary in order to design a better control system or to experimentally identify the plant parameters. On the web dynamics itself, lumped parametric expressions may be used to designate a web section between two adjacent drive rolls, and there is the necessity to incorporate the property of visco-elasticity to the web. In this paper the lumped model of a new web tension experimental system is updated; the model is based on the conservation of mass, torque balance and viscoelasticity (Voigt approach). The experimental system consists of four sections, each of which is driven by a servomotor with the speed and tension feedback, by using encoders and tension sensors. Usually these kinds of models are developed in the Laplace domain and the block scheme gives a graphic interpretation of the interaction between different sections. The block scheme transformation in a differential equation system in the time domain is considered in this paper; it requires the introduction of nonzero initial condition for the derivative of physical variables. The problem of validation has been dealt with in detail in this paper, simultaneously considering 2 different combinations of input data in open loop and a multivariable optimization method in order to estimate the unknown parameters. The results will show the accuracy of this kind of lumped parameters model for the complex experimental systems and useful information for successively designing an efficient control strategy.
{"title":"Updating of an experimental web tension control system model using a multivariable optimization method","authors":"N. Giannoccaro, A. Messina, T. Sakamoto","doi":"10.1109/SPEEDHAM.2008.4581291","DOIUrl":"https://doi.org/10.1109/SPEEDHAM.2008.4581291","url":null,"abstract":"The modelling and the control of the web handling systems have been studied for a long time; the correct modelling is necessary in order to design a better control system or to experimentally identify the plant parameters. On the web dynamics itself, lumped parametric expressions may be used to designate a web section between two adjacent drive rolls, and there is the necessity to incorporate the property of visco-elasticity to the web. In this paper the lumped model of a new web tension experimental system is updated; the model is based on the conservation of mass, torque balance and viscoelasticity (Voigt approach). The experimental system consists of four sections, each of which is driven by a servomotor with the speed and tension feedback, by using encoders and tension sensors. Usually these kinds of models are developed in the Laplace domain and the block scheme gives a graphic interpretation of the interaction between different sections. The block scheme transformation in a differential equation system in the time domain is considered in this paper; it requires the introduction of nonzero initial condition for the derivative of physical variables. The problem of validation has been dealt with in detail in this paper, simultaneously considering 2 different combinations of input data in open loop and a multivariable optimization method in order to estimate the unknown parameters. The results will show the accuracy of this kind of lumped parameters model for the complex experimental systems and useful information for successively designing an efficient control strategy.","PeriodicalId":345557,"journal":{"name":"2008 International Symposium on Power Electronics, Electrical Drives, Automation and Motion","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122529304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-06-11DOI: 10.1109/SPEEDHAM.2008.4581219
G. Giadrossi, R. Menis, Giorgio Sulligoi, Alberto Tessarolo
The paper presents a small-signal stability analysis of voltage control systems employed onboard all-electric cruise liners. To realize the stability analysis, a model of shipboard power station voltage control system has been determined, moving from dynamic models of alternators, voltage regulators and loads. Reduced order models of alternators have been utilized, to simplify at best the analysis. Analysis results have been validated through numerical simulations, using a simulator of power station electromechanic quantities developed at the University of Trieste. Such simulator includes alternators, voltage and frequency regulators, breakers, protections and R-L loads. Numerical results obtained from simulations of both complete and reduced order models fully validate the analytical findings, while computation times are in the order of real-time simulations.
{"title":"Voltage stability analysis of all-electric cruise liners","authors":"G. Giadrossi, R. Menis, Giorgio Sulligoi, Alberto Tessarolo","doi":"10.1109/SPEEDHAM.2008.4581219","DOIUrl":"https://doi.org/10.1109/SPEEDHAM.2008.4581219","url":null,"abstract":"The paper presents a small-signal stability analysis of voltage control systems employed onboard all-electric cruise liners. To realize the stability analysis, a model of shipboard power station voltage control system has been determined, moving from dynamic models of alternators, voltage regulators and loads. Reduced order models of alternators have been utilized, to simplify at best the analysis. Analysis results have been validated through numerical simulations, using a simulator of power station electromechanic quantities developed at the University of Trieste. Such simulator includes alternators, voltage and frequency regulators, breakers, protections and R-L loads. Numerical results obtained from simulations of both complete and reduced order models fully validate the analytical findings, while computation times are in the order of real-time simulations.","PeriodicalId":345557,"journal":{"name":"2008 International Symposium on Power Electronics, Electrical Drives, Automation and Motion","volume":"354 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122796003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-06-11DOI: 10.1109/SPEEDHAM.2008.4581306
T.A. Singo, A. Martinez, S. Saadate
In this paper, a hybrid energy storage system was implemented using batteries and ultracapacitors. The goal of the research is to manage and to optimize energy flow from sources considering consumer demand. Ultracapacitors are requested during power demand, so batteries function under better conditions by avoiding deep discharges. Ultracapacitors role is very important, particularly when temperature is considered. Our results were obtained by simulation in order to confirm the performance and advantages of the global system.
{"title":"Using ultracapacitors to optimize energy storage in a photovoltaic system","authors":"T.A. Singo, A. Martinez, S. Saadate","doi":"10.1109/SPEEDHAM.2008.4581306","DOIUrl":"https://doi.org/10.1109/SPEEDHAM.2008.4581306","url":null,"abstract":"In this paper, a hybrid energy storage system was implemented using batteries and ultracapacitors. The goal of the research is to manage and to optimize energy flow from sources considering consumer demand. Ultracapacitors are requested during power demand, so batteries function under better conditions by avoiding deep discharges. Ultracapacitors role is very important, particularly when temperature is considered. Our results were obtained by simulation in order to confirm the performance and advantages of the global system.","PeriodicalId":345557,"journal":{"name":"2008 International Symposium on Power Electronics, Electrical Drives, Automation and Motion","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122940413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-06-11DOI: 10.1109/SPEEDHAM.2008.4581137
G. Consentino, G. Ardita
This paper studies and analyzes the root causes of anomalous failures of low-voltage p-channel power MOSFETs during the intrinsic diode recovery time in dV/dt test. In particular, the dV/dt characterization test is described and, afterwards, specific electrical tests are provided to explain the root causes. From the electrical results point of view, the dV/dt slew rate does not involve an intrinsic bipolar transistor turn-on, as usually assumed in these kinds of failure. Instead, a gate oxide degradation occurs causing the device to fail as a result of dV/dt repetitive events. Such kinds of gate oxide degradation were observed measuring the threshold voltage degradation after an established dV/dt train of impulses till the failure occured. Afterwards, the same train of impulses was implemented on a new series of samples, changing the circuit and, in particular, inserting a resistor in the gate electrode. In this test, no failures were observed, even if several repetitive trains of impulses were supplied.
{"title":"Anomalous failure in low-voltage p-chanel power MOSFETs during the intrinsic diode recovery time","authors":"G. Consentino, G. Ardita","doi":"10.1109/SPEEDHAM.2008.4581137","DOIUrl":"https://doi.org/10.1109/SPEEDHAM.2008.4581137","url":null,"abstract":"This paper studies and analyzes the root causes of anomalous failures of low-voltage p-channel power MOSFETs during the intrinsic diode recovery time in dV/dt test. In particular, the dV/dt characterization test is described and, afterwards, specific electrical tests are provided to explain the root causes. From the electrical results point of view, the dV/dt slew rate does not involve an intrinsic bipolar transistor turn-on, as usually assumed in these kinds of failure. Instead, a gate oxide degradation occurs causing the device to fail as a result of dV/dt repetitive events. Such kinds of gate oxide degradation were observed measuring the threshold voltage degradation after an established dV/dt train of impulses till the failure occured. Afterwards, the same train of impulses was implemented on a new series of samples, changing the circuit and, in particular, inserting a resistor in the gate electrode. In this test, no failures were observed, even if several repetitive trains of impulses were supplied.","PeriodicalId":345557,"journal":{"name":"2008 International Symposium on Power Electronics, Electrical Drives, Automation and Motion","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121168980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-06-11DOI: 10.1109/SPEEDHAM.2008.4581066
C. Grabner
The considered converter-fed permanent magnet motor could alternatively be operated in two basically different states - the vector control mode or alternatively the brushless dc also known as electronically commutated mode. Several quality aspects concerning the system performance have been comparatively investigated in practical as well as theoretical manner. Focus is thereby given to the numerical analysis and previous evaluation of the well interaction between the novel axially un-skewed higher harmonic airgap wave based permanent magnet motor design and both completely different control algorithms.
{"title":"Vector control versus brushless DC operation of a higher harmonic airgap wave based permanent magnet motor","authors":"C. Grabner","doi":"10.1109/SPEEDHAM.2008.4581066","DOIUrl":"https://doi.org/10.1109/SPEEDHAM.2008.4581066","url":null,"abstract":"The considered converter-fed permanent magnet motor could alternatively be operated in two basically different states - the vector control mode or alternatively the brushless dc also known as electronically commutated mode. Several quality aspects concerning the system performance have been comparatively investigated in practical as well as theoretical manner. Focus is thereby given to the numerical analysis and previous evaluation of the well interaction between the novel axially un-skewed higher harmonic airgap wave based permanent magnet motor design and both completely different control algorithms.","PeriodicalId":345557,"journal":{"name":"2008 International Symposium on Power Electronics, Electrical Drives, Automation and Motion","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121362644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-06-11DOI: 10.1109/SPEEDHAM.2008.4581138
M.I. Mihaiu
Synchronous rectifiers can improve power efficiency, particularly in low-voltage, medium power applications. By using power MOSFET with low Ron resistance in parallel with classical diode, the diode function is closely to ldquoideal dioderdquo. The paper presents the simulation results of a full wave rectifier circuits with control circuit made by the known IC (charge pumps, CMOS analogue switches and MOSFETpsilas). The known IC can be used to design a new IC for full wave synchronous rectifier. The main applications of synchronous rectifiers are for DC-DC converter but we propose the extension to the general purpose rectifier circuit. For low voltage output rectifiers (smaller than 5 V) the efficiency can increase with 15% by using synchronous technique. In the paper is presented a new IC structure for control the full wave synchronous rectifier.
{"title":"Toward the “ideal diode” using power MOSFET in full wave synchronous rectifiers for low voltage power supplies","authors":"M.I. Mihaiu","doi":"10.1109/SPEEDHAM.2008.4581138","DOIUrl":"https://doi.org/10.1109/SPEEDHAM.2008.4581138","url":null,"abstract":"Synchronous rectifiers can improve power efficiency, particularly in low-voltage, medium power applications. By using power MOSFET with low Ron resistance in parallel with classical diode, the diode function is closely to ldquoideal dioderdquo. The paper presents the simulation results of a full wave rectifier circuits with control circuit made by the known IC (charge pumps, CMOS analogue switches and MOSFETpsilas). The known IC can be used to design a new IC for full wave synchronous rectifier. The main applications of synchronous rectifiers are for DC-DC converter but we propose the extension to the general purpose rectifier circuit. For low voltage output rectifiers (smaller than 5 V) the efficiency can increase with 15% by using synchronous technique. In the paper is presented a new IC structure for control the full wave synchronous rectifier.","PeriodicalId":345557,"journal":{"name":"2008 International Symposium on Power Electronics, Electrical Drives, Automation and Motion","volume":"1072 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116020096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-06-11DOI: 10.1109/SPEEDHAM.2008.4581246
C. Canesin, F. Gonçalves, E. Leandro, J. Pinto
This paper is based on the analysis and implementation of a new drive system applied to refrigeration systems, complying with the restrictions imposed by the IEC standards (Harmonic/Flicker/EMI-Electromagnetic Interference restrictions), in order to obtain high efficiency, high power factor, reduced harmonic distortion in the input current and reduced electromagnetic interference, with excellent performance in temperature control of a refrigeration prototype system (automatic control, precision and high dynamic response). The proposal is replace the single-phase motor by a three-phase motor, in the conventional refrigeration system. In this way, a proper control technique can be applied, using a closed-loop (feedback control), that will allow an accurate adjustment of the desirable temperature. The proposed refrigeration prototype uses a 0.5 Hp three-phase motor and an open (Belt-Drive) Bitzer IY type compressor. The input rectifier stagepsilas features include the reduction in the input current ripple, the reduction in the output voltage ripple, the use of low stress devices, low volume for the EMI input filter, high input power factor (PF), and low total harmonic distortion (THD) in the input current, in compliance with the IEC61000-3-2 standards. The digital controller for the output three-phase inverter stage has been developed using a conventional voltage-frequency control (scalar V/f control), and a simplified stator oriented Vector control, in order to verify the feasibility and performance of the proposed digital controls for continuous temperature control applied at the refrigerator prototype.
{"title":"Variable speed refrigeration system with HPF input rectifier stage","authors":"C. Canesin, F. Gonçalves, E. Leandro, J. Pinto","doi":"10.1109/SPEEDHAM.2008.4581246","DOIUrl":"https://doi.org/10.1109/SPEEDHAM.2008.4581246","url":null,"abstract":"This paper is based on the analysis and implementation of a new drive system applied to refrigeration systems, complying with the restrictions imposed by the IEC standards (Harmonic/Flicker/EMI-Electromagnetic Interference restrictions), in order to obtain high efficiency, high power factor, reduced harmonic distortion in the input current and reduced electromagnetic interference, with excellent performance in temperature control of a refrigeration prototype system (automatic control, precision and high dynamic response). The proposal is replace the single-phase motor by a three-phase motor, in the conventional refrigeration system. In this way, a proper control technique can be applied, using a closed-loop (feedback control), that will allow an accurate adjustment of the desirable temperature. The proposed refrigeration prototype uses a 0.5 Hp three-phase motor and an open (Belt-Drive) Bitzer IY type compressor. The input rectifier stagepsilas features include the reduction in the input current ripple, the reduction in the output voltage ripple, the use of low stress devices, low volume for the EMI input filter, high input power factor (PF), and low total harmonic distortion (THD) in the input current, in compliance with the IEC61000-3-2 standards. The digital controller for the output three-phase inverter stage has been developed using a conventional voltage-frequency control (scalar V/f control), and a simplified stator oriented Vector control, in order to verify the feasibility and performance of the proposed digital controls for continuous temperature control applied at the refrigerator prototype.","PeriodicalId":345557,"journal":{"name":"2008 International Symposium on Power Electronics, Electrical Drives, Automation and Motion","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116842826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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