Pub Date : 2017-11-01DOI: 10.1109/COBEP.2017.8257320
A. Bartsch, G. H. Negri, M. S. M. Cavalca, J. de Oliveira, A. Nied
This paper presents a discussion about cost function design procedure for finite control set model predictive control (FCS-MPC) applied to electrical permanent magnet synchronous motor (PMSM) drive. In such analysis, different cost function choices were evaluated, with different type of costs and weighting, in order to achieve the main control objective: minimum torque error, accomplishing the maximum torque per ampere condition. Moreover, this study is completed with discussion on the choice of weighted variables for each objective and its influence in some figures of merit, such as current THD and torque ripple.
{"title":"Cost function tuning methodology for FCS-MPC applied to PMSM drives","authors":"A. Bartsch, G. H. Negri, M. S. M. Cavalca, J. de Oliveira, A. Nied","doi":"10.1109/COBEP.2017.8257320","DOIUrl":"https://doi.org/10.1109/COBEP.2017.8257320","url":null,"abstract":"This paper presents a discussion about cost function design procedure for finite control set model predictive control (FCS-MPC) applied to electrical permanent magnet synchronous motor (PMSM) drive. In such analysis, different cost function choices were evaluated, with different type of costs and weighting, in order to achieve the main control objective: minimum torque error, accomplishing the maximum torque per ampere condition. Moreover, this study is completed with discussion on the choice of weighted variables for each objective and its influence in some figures of merit, such as current THD and torque ripple.","PeriodicalId":375493,"journal":{"name":"2017 Brazilian Power Electronics Conference (COBEP)","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125767537","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 : 2017-11-01DOI: 10.1109/COBEP.2017.8257317
A. A. Bento, L. Monteiro
This work presents a comprehensive study of the One Cycle Control (OCC) technique. Initially, the stability of such technique through empirical and formal demonstrations is introduced. Features and inherent drawbacks are presented to provide a better understanding of such technique. Proposals for minimizing some of the discussed drawbacks are presented and, moreover, there are also proposals to reduce the number of devices and cost of the ordinary OCC control circuitry. Finally, applications of OCC technique to Power Factor Correction Rectifier (PFC), Grid Connected Inverter (GCI), and Active Power Filter (APF) are presented and verified with simulation essays to evaluate the control performance. Preliminary experimental results are carried out and compared with the theoretical prediction.
{"title":"Considerations on one cycle control technique","authors":"A. A. Bento, L. Monteiro","doi":"10.1109/COBEP.2017.8257317","DOIUrl":"https://doi.org/10.1109/COBEP.2017.8257317","url":null,"abstract":"This work presents a comprehensive study of the One Cycle Control (OCC) technique. Initially, the stability of such technique through empirical and formal demonstrations is introduced. Features and inherent drawbacks are presented to provide a better understanding of such technique. Proposals for minimizing some of the discussed drawbacks are presented and, moreover, there are also proposals to reduce the number of devices and cost of the ordinary OCC control circuitry. Finally, applications of OCC technique to Power Factor Correction Rectifier (PFC), Grid Connected Inverter (GCI), and Active Power Filter (APF) are presented and verified with simulation essays to evaluate the control performance. Preliminary experimental results are carried out and compared with the theoretical prediction.","PeriodicalId":375493,"journal":{"name":"2017 Brazilian Power Electronics Conference (COBEP)","volume":"118 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124201814","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 : 2017-11-01DOI: 10.1109/COBEP.2017.8257420
R. F. Magossi, P. G. B. Ferreira, M. S. Quinalia, Marina C. Carvalho, R. Machado
The single diode model can be used to modelling a photovoltaic (PV) cell. However, the use of the single diode model to implement a PV emulator can not be practical in case the application requires a high voltage output This happens in consequence of the low threshold voltage of the silicon diode, which means the circuit should be composed by several single diode circuit. Therefore, in this paper, we propose the use of a zener diode to obtain a PV emulator with a high voltage output using fewer devices.
{"title":"Project of a solar module emulator using a zener diode to analyze the behavior of MPPT algorithms","authors":"R. F. Magossi, P. G. B. Ferreira, M. S. Quinalia, Marina C. Carvalho, R. Machado","doi":"10.1109/COBEP.2017.8257420","DOIUrl":"https://doi.org/10.1109/COBEP.2017.8257420","url":null,"abstract":"The single diode model can be used to modelling a photovoltaic (PV) cell. However, the use of the single diode model to implement a PV emulator can not be practical in case the application requires a high voltage output This happens in consequence of the low threshold voltage of the silicon diode, which means the circuit should be composed by several single diode circuit. Therefore, in this paper, we propose the use of a zener diode to obtain a PV emulator with a high voltage output using fewer devices.","PeriodicalId":375493,"journal":{"name":"2017 Brazilian Power Electronics Conference (COBEP)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126367983","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 : 2017-11-01DOI: 10.1109/COBEP.2017.8257302
C. G. D. S. Moraes, R. B. Godoy, G. Luigi
This paper presents a topological change of the power stage and an adaptation of the control method of a three-phase water pump drive supplied by photovoltaic energy. Because it is a product-oriented project, the modifications have proven to be very advantageous since they indicate a considerable reduction in the final cost of the equipment. Such a reduction is mainly due to the use of lower voltage power switches and the removal of high frequency elevating transformers. In addition to the topological improvements, the adaptation of the control method allowed a significant improvement in the reliability and robustness of the system operation, functioning without interruptions due to partial shading and without overvoltage in the DC bus during startups with extreme conditions of irradiation.
{"title":"Adaptions in a three phase water pump drive to improve dynamic control and reduce costs","authors":"C. G. D. S. Moraes, R. B. Godoy, G. Luigi","doi":"10.1109/COBEP.2017.8257302","DOIUrl":"https://doi.org/10.1109/COBEP.2017.8257302","url":null,"abstract":"This paper presents a topological change of the power stage and an adaptation of the control method of a three-phase water pump drive supplied by photovoltaic energy. Because it is a product-oriented project, the modifications have proven to be very advantageous since they indicate a considerable reduction in the final cost of the equipment. Such a reduction is mainly due to the use of lower voltage power switches and the removal of high frequency elevating transformers. In addition to the topological improvements, the adaptation of the control method allowed a significant improvement in the reliability and robustness of the system operation, functioning without interruptions due to partial shading and without overvoltage in the DC bus during startups with extreme conditions of irradiation.","PeriodicalId":375493,"journal":{"name":"2017 Brazilian Power Electronics Conference (COBEP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130428435","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 : 2017-11-01DOI: 10.1109/COBEP.2017.8257436
Christian Tshizubu, J. Santisteban
Nowadays, active magnetic bearings (AMBs) can be found operating in several applications. The fabrication of these devices can be considered a mature issue as a consequence of several decades of research and developing. Nevertheless, the related cost of the construction of its parts continues to be high. This is particularly true as the commissioning requires previous information like the machine shaft dimensions where these devices are going to be working. Even more, when there is not an automatic tool to mount their windings, this work continues to be manually. With this in mind, the possibility to use conventional induction motors to reduce the cost of active magnetic bearings is presented in this work. Different to the conventional (AMBs), the magnetic fluxes distribution is based in the coupled one structure as found in a four poles conventional AC motor with distributed windings. Through Finite Elements analysis, a two phase and a three phase cases are considered. Experimental results, using the two phase version, validate this approach.
{"title":"Turning induction motors in four poles active magnetic bearings with coupled fluxes","authors":"Christian Tshizubu, J. Santisteban","doi":"10.1109/COBEP.2017.8257436","DOIUrl":"https://doi.org/10.1109/COBEP.2017.8257436","url":null,"abstract":"Nowadays, active magnetic bearings (AMBs) can be found operating in several applications. The fabrication of these devices can be considered a mature issue as a consequence of several decades of research and developing. Nevertheless, the related cost of the construction of its parts continues to be high. This is particularly true as the commissioning requires previous information like the machine shaft dimensions where these devices are going to be working. Even more, when there is not an automatic tool to mount their windings, this work continues to be manually. With this in mind, the possibility to use conventional induction motors to reduce the cost of active magnetic bearings is presented in this work. Different to the conventional (AMBs), the magnetic fluxes distribution is based in the coupled one structure as found in a four poles conventional AC motor with distributed windings. Through Finite Elements analysis, a two phase and a three phase cases are considered. Experimental results, using the two phase version, validate this approach.","PeriodicalId":375493,"journal":{"name":"2017 Brazilian Power Electronics Conference (COBEP)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116994432","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 : 2017-11-01DOI: 10.1109/COBEP.2017.8257359
Alisson Mengatto, J. A. Heerdt
This paper presents an operation mode for an onboard integrated battery charger (IBC) which uses the electric vehicle (EV) traction motor as input filter in the battery charging mode. The studied charger adds few components to the already existing power electronics employed for propulsion. By connecting the single-phase mains to the traction inverter, only two mechanical switches or solid state relays are necessary to configure the same converter to operate as a battery charger. The proposed operation mode for this IBC reduce and distribute the inverter losses during charging operation mode. Furthermore, a machine analysis is presented to characterize the machine behavior considering the single-phase input current flowing through the three-phase traction motor. Although the IBC is best suited for an induction motor (IM) application, an analysis of the feasibility of using a permanent magnet (PM) motor is realized. Simulation results are presented which validates the functionality of the proposed charger operation.
{"title":"Analysis and operation of an integrated battery charger using the EV traction motor as filter","authors":"Alisson Mengatto, J. A. Heerdt","doi":"10.1109/COBEP.2017.8257359","DOIUrl":"https://doi.org/10.1109/COBEP.2017.8257359","url":null,"abstract":"This paper presents an operation mode for an onboard integrated battery charger (IBC) which uses the electric vehicle (EV) traction motor as input filter in the battery charging mode. The studied charger adds few components to the already existing power electronics employed for propulsion. By connecting the single-phase mains to the traction inverter, only two mechanical switches or solid state relays are necessary to configure the same converter to operate as a battery charger. The proposed operation mode for this IBC reduce and distribute the inverter losses during charging operation mode. Furthermore, a machine analysis is presented to characterize the machine behavior considering the single-phase input current flowing through the three-phase traction motor. Although the IBC is best suited for an induction motor (IM) application, an analysis of the feasibility of using a permanent magnet (PM) motor is realized. Simulation results are presented which validates the functionality of the proposed charger operation.","PeriodicalId":375493,"journal":{"name":"2017 Brazilian Power Electronics Conference (COBEP)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128287340","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 : 2017-11-01DOI: 10.1109/COBEP.2017.8257314
J. Schmidt, G. Azevedo, M. Cavalcanti, J. R. Pinheiro
Proper design of High-Frequency (HF) and Low-Frequency (LF) transformers parameters is one of the key elements for a high-performance isolated converters design. In practice, transformer designers have employed several techniques for achieve suitable designs, assuming rules of thumbs based on their expertise. In this paper, a design methodology for HF transformers based on product areas (Ap) that uses iterative processes in combination with rules of thumb for different specific variables, is presented and discussed. The most suitable design results for 100 kHz are implemented and validated to 1.5kW ZVS DC/DC Full-Bridge converter. Results shown the temperature rise achieve the estimated value of 13.9 °C, and a HF transformer efficiency of 99.64%, in which it brings converter efficiency close to 97.50% at rated power.
{"title":"A HF transformer design methodology for high efficiency isolated ZVS DC/DC converters","authors":"J. Schmidt, G. Azevedo, M. Cavalcanti, J. R. Pinheiro","doi":"10.1109/COBEP.2017.8257314","DOIUrl":"https://doi.org/10.1109/COBEP.2017.8257314","url":null,"abstract":"Proper design of High-Frequency (HF) and Low-Frequency (LF) transformers parameters is one of the key elements for a high-performance isolated converters design. In practice, transformer designers have employed several techniques for achieve suitable designs, assuming rules of thumbs based on their expertise. In this paper, a design methodology for HF transformers based on product areas (Ap) that uses iterative processes in combination with rules of thumb for different specific variables, is presented and discussed. The most suitable design results for 100 kHz are implemented and validated to 1.5kW ZVS DC/DC Full-Bridge converter. Results shown the temperature rise achieve the estimated value of 13.9 °C, and a HF transformer efficiency of 99.64%, in which it brings converter efficiency close to 97.50% at rated power.","PeriodicalId":375493,"journal":{"name":"2017 Brazilian Power Electronics Conference (COBEP)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128349462","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 : 2017-11-01DOI: 10.1109/COBEP.2017.8257353
S. J. de Mesquita, F. Antunes, S. Daher, R. Bascopé
This paper presents a new support aiding tool for the design of multilevel-inverter, through simulation analysis by using Orcad Pspice. The new proposed software generates programmable pulses in accordance to the operation principle of a desired topology. It will be also presented several simulated inverters using the software. This new resource enables the fine-tuning of dead time between complementary switches of a same leg. This is done through programming, applying semiconductor technology prior knowledge. It also provides a portable code which facilitates its implementation in a microcontroller, FPGA or DSP. A test case using a 81 level output voltage cascade multilevel inverter is presented to show the performance of the proposed software tool.
{"title":"An aiding tool to the design and simulation of multilevel inverters","authors":"S. J. de Mesquita, F. Antunes, S. Daher, R. Bascopé","doi":"10.1109/COBEP.2017.8257353","DOIUrl":"https://doi.org/10.1109/COBEP.2017.8257353","url":null,"abstract":"This paper presents a new support aiding tool for the design of multilevel-inverter, through simulation analysis by using Orcad Pspice. The new proposed software generates programmable pulses in accordance to the operation principle of a desired topology. It will be also presented several simulated inverters using the software. This new resource enables the fine-tuning of dead time between complementary switches of a same leg. This is done through programming, applying semiconductor technology prior knowledge. It also provides a portable code which facilitates its implementation in a microcontroller, FPGA or DSP. A test case using a 81 level output voltage cascade multilevel inverter is presented to show the performance of the proposed software tool.","PeriodicalId":375493,"journal":{"name":"2017 Brazilian Power Electronics Conference (COBEP)","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132209575","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 : 2017-11-01DOI: 10.1109/COBEP.2017.8257399
Bernardo F. Musse, N. L. Silva, Dalmo C. Silva, L. D. de Oliveira, J. G. de Oliveira
Nowadays, there is a strong discussion about future distribution network and the interaction between today's electric grid and renewables. In this paper, a Controller-Hardware-In-The-Loop simulation of Photovoltaic System (PV) integration to the distribution grid is performed in real time using a RTDS and dSPACE. An adapted version of IEEE 13 Node Test System, with two different Distributed Generation (DG), PV system and a Diesel Generator, is used to test the control of power converters in HIL. Voltage and frequency deviations are checked for different scenarios. Results validate the proposed control strategy, showing the system's response in a situation closer to reality.
{"title":"Controller-hardware-in-the-loop simulation of a distribution system with PV penetration using RTDS and dSPACE","authors":"Bernardo F. Musse, N. L. Silva, Dalmo C. Silva, L. D. de Oliveira, J. G. de Oliveira","doi":"10.1109/COBEP.2017.8257399","DOIUrl":"https://doi.org/10.1109/COBEP.2017.8257399","url":null,"abstract":"Nowadays, there is a strong discussion about future distribution network and the interaction between today's electric grid and renewables. In this paper, a Controller-Hardware-In-The-Loop simulation of Photovoltaic System (PV) integration to the distribution grid is performed in real time using a RTDS and dSPACE. An adapted version of IEEE 13 Node Test System, with two different Distributed Generation (DG), PV system and a Diesel Generator, is used to test the control of power converters in HIL. Voltage and frequency deviations are checked for different scenarios. Results validate the proposed control strategy, showing the system's response in a situation closer to reality.","PeriodicalId":375493,"journal":{"name":"2017 Brazilian Power Electronics Conference (COBEP)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132935033","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 : 2017-11-01DOI: 10.1109/COBEP.2017.8257250
Raoni de A. Pegado, R. C. M. Gomes, Luciano F. S. Alves, M. Vitorino, Y. P. M. Rodriguez, A. V. M. L. Filho
The focus of this study is concentrated in the modeling and digital implementation of high-frequency switching devices present in the structure of a static DC-DC converter. Initially they were studied digital simulation techniques for electromagnetic transients, based on methods of numerical integration, for the modeling of basic circuit elements, such as inductors, capacitors and resistors. Then, methods for representing high-frequency switches were studied, which are based on representations of switching states such as inductors and RC-series branches. This type of representation allowed the admittance matrix that represents the system remained constant throughout the simulation, resulting in the reduction of computational effort and consequently on the use of small steps of calculation. The validation of the model was performed by comparing the simulation with the experimental results.
{"title":"High-frequency switch modeling technique applied to DC-DC converters simulation","authors":"Raoni de A. Pegado, R. C. M. Gomes, Luciano F. S. Alves, M. Vitorino, Y. P. M. Rodriguez, A. V. M. L. Filho","doi":"10.1109/COBEP.2017.8257250","DOIUrl":"https://doi.org/10.1109/COBEP.2017.8257250","url":null,"abstract":"The focus of this study is concentrated in the modeling and digital implementation of high-frequency switching devices present in the structure of a static DC-DC converter. Initially they were studied digital simulation techniques for electromagnetic transients, based on methods of numerical integration, for the modeling of basic circuit elements, such as inductors, capacitors and resistors. Then, methods for representing high-frequency switches were studied, which are based on representations of switching states such as inductors and RC-series branches. This type of representation allowed the admittance matrix that represents the system remained constant throughout the simulation, resulting in the reduction of computational effort and consequently on the use of small steps of calculation. The validation of the model was performed by comparing the simulation with the experimental results.","PeriodicalId":375493,"journal":{"name":"2017 Brazilian Power Electronics Conference (COBEP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127685546","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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