Pub Date : 2012-11-01DOI: 10.1109/INDUSCON.2012.6453691
J. A. F. Neto, R. Bascopé, C. Cruz, R. G. A. Cacau, G. Bascope
In this paper is presented a comparative evaluation in steady-state of three single-phase NPC multilevel inverters. The first is a five-level neutral point clamped (NPC) inverter based on multi-stage switching cell (MSSC); the second is also a five-level neutral point clamped (NPC) inverter based on interleaved cell (IC); and the third is a three-level neutral point clamped (NPC) inverter based on paralleled cell (PC). For this comparative purpose, the switching frequency is constant and the evaluated parameters are the volume of the heatsinks and the passive components, the total harmonic distortion (THD) of the output voltage, the power density and efficiency of each topology. Theoretical analyses, as well as simulation and experimental results obtained from 5kW prototype are presented.
{"title":"Comparative evaluation of three single-phase NPC inverters","authors":"J. A. F. Neto, R. Bascopé, C. Cruz, R. G. A. Cacau, G. Bascope","doi":"10.1109/INDUSCON.2012.6453691","DOIUrl":"https://doi.org/10.1109/INDUSCON.2012.6453691","url":null,"abstract":"In this paper is presented a comparative evaluation in steady-state of three single-phase NPC multilevel inverters. The first is a five-level neutral point clamped (NPC) inverter based on multi-stage switching cell (MSSC); the second is also a five-level neutral point clamped (NPC) inverter based on interleaved cell (IC); and the third is a three-level neutral point clamped (NPC) inverter based on paralleled cell (PC). For this comparative purpose, the switching frequency is constant and the evaluated parameters are the volume of the heatsinks and the passive components, the total harmonic distortion (THD) of the output voltage, the power density and efficiency of each topology. Theoretical analyses, as well as simulation and experimental results obtained from 5kW prototype are presented.","PeriodicalId":442317,"journal":{"name":"2012 10th IEEE/IAS International Conference on Industry Applications","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123087977","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 : 2012-11-01DOI: 10.1109/INDUSCON.2012.6453513
Ranoyca Nayana Alencar Leao e Silva, L. Barreto, A. U. Barbosa, D. R. Joca, P. Praça
This paper presents a digital implementation of the modulation technique based on the PD-PWM using a FPGA (Field Programmable Gate Array) with its logical structure developed through the VHDL language. The technique uses a modified modulation and two triangular carriers which it's applied to a five level hybrid multilevel inverter (based on the Half-Bridge and ANPC topologies). The experimental results validate both the digital development of the technique on FPGA and the presented inverter.
{"title":"Digital implementation of a modulation technique for a multilevel inverter on FPGA","authors":"Ranoyca Nayana Alencar Leao e Silva, L. Barreto, A. U. Barbosa, D. R. Joca, P. Praça","doi":"10.1109/INDUSCON.2012.6453513","DOIUrl":"https://doi.org/10.1109/INDUSCON.2012.6453513","url":null,"abstract":"This paper presents a digital implementation of the modulation technique based on the PD-PWM using a FPGA (Field Programmable Gate Array) with its logical structure developed through the VHDL language. The technique uses a modified modulation and two triangular carriers which it's applied to a five level hybrid multilevel inverter (based on the Half-Bridge and ANPC topologies). The experimental results validate both the digital development of the technique on FPGA and the presented inverter.","PeriodicalId":442317,"journal":{"name":"2012 10th IEEE/IAS International Conference on Industry Applications","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117173760","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 : 2012-11-01DOI: 10.1109/INDUSCON.2012.6453004
A. M. Airabella, Germán G. Oggier, L. Piris-Botalla, Cristian Ariel Falco, G. García
The operation of a Dual Active Bridge (DAB) DCDC converter when one of its power semiconductors presents an open circuit fault is analyzed in this paper. In order to be able to detect this sort of failure, a new diagnosis strategy is proposed. The strategy consists basically of two stages: 1) measure the voltage drop in each power semiconductor in on-state by a proper modification in the driver circuits and 2) feedback the fault signal generated in the drive circuits to the microcontroller to decide the next action. Then, the voltage measured is compared with a reference value to determine if a semiconductor presents an open-circuit fault. The proposed strategy has the advantage that it can be implemented without including additional sensors. Simulation and experimental results are included to validate the theory.
{"title":"Open transistors and diodes fault diagnosis strategy for Dual Active Bridge DC-DC converter","authors":"A. M. Airabella, Germán G. Oggier, L. Piris-Botalla, Cristian Ariel Falco, G. García","doi":"10.1109/INDUSCON.2012.6453004","DOIUrl":"https://doi.org/10.1109/INDUSCON.2012.6453004","url":null,"abstract":"The operation of a Dual Active Bridge (DAB) DCDC converter when one of its power semiconductors presents an open circuit fault is analyzed in this paper. In order to be able to detect this sort of failure, a new diagnosis strategy is proposed. The strategy consists basically of two stages: 1) measure the voltage drop in each power semiconductor in on-state by a proper modification in the driver circuits and 2) feedback the fault signal generated in the drive circuits to the microcontroller to decide the next action. Then, the voltage measured is compared with a reference value to determine if a semiconductor presents an open-circuit fault. The proposed strategy has the advantage that it can be implemented without including additional sensors. Simulation and experimental results are included to validate the theory.","PeriodicalId":442317,"journal":{"name":"2012 10th IEEE/IAS International Conference on Industry Applications","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122143581","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 : 2012-11-01DOI: 10.1109/INDUSCON.2012.6453144
P. S. Almeida, G. M. Soares, H. Braga
In this work, an off-line flyback converter with PWM dimming function employing a single active power switch is proposed for LED lighting. The proposed converter is a slightly modified flyback topology which enables the main switch to be used both for power factor correction and PWM high-frequency dimming with a constant peak current on the LEDs, in order to conserve chromatic characteristics of the light emitted. The proposed control scheme uses duty-cycle to control the dimming level, while switching frequency is varied along to adjust the input power level and maintain a constant peak current on the LEDs. Mathematical description, simulation and experimental results of a prototype with 100 W of peak power fed from 127 V mains voltage are presented in this paper to show feasibility of the single-stage converter proposal.
{"title":"Off-line flyback LED driver with PWM dimming and power factor correction employing a single switch","authors":"P. S. Almeida, G. M. Soares, H. Braga","doi":"10.1109/INDUSCON.2012.6453144","DOIUrl":"https://doi.org/10.1109/INDUSCON.2012.6453144","url":null,"abstract":"In this work, an off-line flyback converter with PWM dimming function employing a single active power switch is proposed for LED lighting. The proposed converter is a slightly modified flyback topology which enables the main switch to be used both for power factor correction and PWM high-frequency dimming with a constant peak current on the LEDs, in order to conserve chromatic characteristics of the light emitted. The proposed control scheme uses duty-cycle to control the dimming level, while switching frequency is varied along to adjust the input power level and maintain a constant peak current on the LEDs. Mathematical description, simulation and experimental results of a prototype with 100 W of peak power fed from 127 V mains voltage are presented in this paper to show feasibility of the single-stage converter proposal.","PeriodicalId":442317,"journal":{"name":"2012 10th IEEE/IAS International Conference on Industry Applications","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116198727","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 : 2012-11-01DOI: 10.1109/INDUSCON.2012.6453709
J. L. Junior, R. Bascopé, F. Lima, C. Cruz
This paper presents a double boost converter with power factor correction (PFC) suitable for parallel/series connected inputs, depending on the grid voltage value. Using the proposed converter is possible to eliminate the low-frequency autotransformer in input of the converter which allows UPS operation with two input voltage values (110V and 220V). The control strategy is based on the average current mode control and applied to both converters, in order to provide power factor correction and output voltage regulation. The simulation results for a 2.4 kW proposed converter are presented in order to demonstrate the proposed ideas.
{"title":"A double boost converter with PFC and series/parallel inputs connection for UPS systems","authors":"J. L. Junior, R. Bascopé, F. Lima, C. Cruz","doi":"10.1109/INDUSCON.2012.6453709","DOIUrl":"https://doi.org/10.1109/INDUSCON.2012.6453709","url":null,"abstract":"This paper presents a double boost converter with power factor correction (PFC) suitable for parallel/series connected inputs, depending on the grid voltage value. Using the proposed converter is possible to eliminate the low-frequency autotransformer in input of the converter which allows UPS operation with two input voltage values (110V and 220V). The control strategy is based on the average current mode control and applied to both converters, in order to provide power factor correction and output voltage regulation. The simulation results for a 2.4 kW proposed converter are presented in order to demonstrate the proposed ideas.","PeriodicalId":442317,"journal":{"name":"2012 10th IEEE/IAS International Conference on Industry Applications","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126832974","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 : 2012-11-01DOI: 10.1109/INDUSCON.2012.6453799
P. K. P. Vieira, E. D. da Silva
This paper applies a proposed digital One-Cycle Control technique to the three-phase Active Neutral Point Clamped (ANPC) rectifier and three derived topologies as well. Its principal advantages are simplicity, robustness and low cost besides the fact that it does not need any voltage detector, template or multiplier for the utility power factor control. Experimental results confirm the feasibility of both the proposed controller and topologies.
{"title":"A digital current control strategy for One-Cycle Control based Active Neutral Point Clamped rectifier and three derived topologies","authors":"P. K. P. Vieira, E. D. da Silva","doi":"10.1109/INDUSCON.2012.6453799","DOIUrl":"https://doi.org/10.1109/INDUSCON.2012.6453799","url":null,"abstract":"This paper applies a proposed digital One-Cycle Control technique to the three-phase Active Neutral Point Clamped (ANPC) rectifier and three derived topologies as well. Its principal advantages are simplicity, robustness and low cost besides the fact that it does not need any voltage detector, template or multiplier for the utility power factor control. Experimental results confirm the feasibility of both the proposed controller and topologies.","PeriodicalId":442317,"journal":{"name":"2012 10th IEEE/IAS International Conference on Industry Applications","volume":"34 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130035858","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 : 2012-11-01DOI: 10.1109/INDUSCON.2012.6453204
G. M. Soares, P. S. Almeida, D. P. Pinto, H. Braga
This work proposes a comparison between two different approaches for LED driving, based on the Ćuk converter operating in discontinuous conduction mode and an integrated SEPIC Buck-Boost converter. A brief analysis of each converter is carried out and a design methodology is presented, focused in reducing output filtering capacitance, still achieving acceptable current ripple on the output and eliminating the need for electrolytic capacitors. The LED photometric performance under different ripple conditions has been analyzed to aid the design methodology in order to optimize output current ripple selection and capacitor reduction. The control strategy for each converter was presented and validated experimentally. Experimental results were obtained for both converters from two prototypes feeding 56 series-associated high-power LEDs from 220 VAC-60 Hz mains.
{"title":"A comparative study between two single-stage LED drivers: A sole converter versus an integrated topology","authors":"G. M. Soares, P. S. Almeida, D. P. Pinto, H. Braga","doi":"10.1109/INDUSCON.2012.6453204","DOIUrl":"https://doi.org/10.1109/INDUSCON.2012.6453204","url":null,"abstract":"This work proposes a comparison between two different approaches for LED driving, based on the Ćuk converter operating in discontinuous conduction mode and an integrated SEPIC Buck-Boost converter. A brief analysis of each converter is carried out and a design methodology is presented, focused in reducing output filtering capacitance, still achieving acceptable current ripple on the output and eliminating the need for electrolytic capacitors. The LED photometric performance under different ripple conditions has been analyzed to aid the design methodology in order to optimize output current ripple selection and capacitor reduction. The control strategy for each converter was presented and validated experimentally. Experimental results were obtained for both converters from two prototypes feeding 56 series-associated high-power LEDs from 220 VAC-60 Hz mains.","PeriodicalId":442317,"journal":{"name":"2012 10th IEEE/IAS International Conference on Industry Applications","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131933134","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 : 2012-11-01DOI: 10.1109/INDUSCON.2012.6451395
D. M. Tavares, S. J. Bachega
Flexible Manufacturing Systems (FMS) are considered one of the key strategic systems when coping with current manufacturing environments. FMS uses various technologies integrated in a system, including Automated Guided Vehicles (AGVs). An AGV which serves an FMS environment usually has four components: the vehicles (uni or multiloaded), the load/deposit stations, the orientation and traffic control system and the communication system. In this research, we specified and implemented a communication system for AGVs intended as a resource for FMS. We used a cellbot framework (MIT App Inventor Beta) in order to make the infrastructure easily available for researchers. The methodology used was based on evolutionary and incremental prototyping. The main contribution of this research is to supply the communication system as an aid in establishing a development basis for orientation, traffic control and even hardware in the loop simulations where online communication with the AGV is required.
{"title":"Proposal for an AGV communication system using a cellbot framework","authors":"D. M. Tavares, S. J. Bachega","doi":"10.1109/INDUSCON.2012.6451395","DOIUrl":"https://doi.org/10.1109/INDUSCON.2012.6451395","url":null,"abstract":"Flexible Manufacturing Systems (FMS) are considered one of the key strategic systems when coping with current manufacturing environments. FMS uses various technologies integrated in a system, including Automated Guided Vehicles (AGVs). An AGV which serves an FMS environment usually has four components: the vehicles (uni or multiloaded), the load/deposit stations, the orientation and traffic control system and the communication system. In this research, we specified and implemented a communication system for AGVs intended as a resource for FMS. We used a cellbot framework (MIT App Inventor Beta) in order to make the infrastructure easily available for researchers. The methodology used was based on evolutionary and incremental prototyping. The main contribution of this research is to supply the communication system as an aid in establishing a development basis for orientation, traffic control and even hardware in the loop simulations where online communication with the AGV is required.","PeriodicalId":442317,"journal":{"name":"2012 10th IEEE/IAS International Conference on Industry Applications","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131286606","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 : 2012-11-01DOI: 10.1109/INDUSCON.2012.6453421
G. A. G. Ribeiro, L. Queiroz, G. Martins, H. A. Pereira
The generated power by a solar panel is directly related to the level of solar radiation on the panel. Thus a system capable of tracking the solar movement improves the efficiency in the generated power. This work presents a study and construction of a sun tracking prototype in order to follow the movement of the sun during the day and increase the power generated by the panel. The aim was to build a simplified and low-cost structure that increases the performance of the system in 12 - 18 percent.
{"title":"A low-cost prototype for sun tracking","authors":"G. A. G. Ribeiro, L. Queiroz, G. Martins, H. A. Pereira","doi":"10.1109/INDUSCON.2012.6453421","DOIUrl":"https://doi.org/10.1109/INDUSCON.2012.6453421","url":null,"abstract":"The generated power by a solar panel is directly related to the level of solar radiation on the panel. Thus a system capable of tracking the solar movement improves the efficiency in the generated power. This work presents a study and construction of a sun tracking prototype in order to follow the movement of the sun during the day and increase the power generated by the panel. The aim was to build a simplified and low-cost structure that increases the performance of the system in 12 - 18 percent.","PeriodicalId":442317,"journal":{"name":"2012 10th IEEE/IAS International Conference on Industry Applications","volume":"81 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134005663","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 : 2012-11-01DOI: 10.1109/INDUSCON.2012.6452674
D. Arcanjo, J. Pereira, E. J. Oliveira, W. Peres, L. D. de Oliveira, I. C. da Silva Junior
This paper presents an approach based on Cuckoo Search method for optimal capacitor placement in distribution systems. The Cuckoo Search (CS) algorithm is used to solve this mixed non linear integer optimization problem which aims to minimize losses in distribution systems. The proposed algorithm is evaluated using the IEEE 16-bus, IEEE 33-bus and IEEE 69-bus distributions systems. The results obtained show the effectiveness of the proposed technique.
{"title":"Cuckoo Search Optimization technique applied to capacitor placement on distribution system problem","authors":"D. Arcanjo, J. Pereira, E. J. Oliveira, W. Peres, L. D. de Oliveira, I. C. da Silva Junior","doi":"10.1109/INDUSCON.2012.6452674","DOIUrl":"https://doi.org/10.1109/INDUSCON.2012.6452674","url":null,"abstract":"This paper presents an approach based on Cuckoo Search method for optimal capacitor placement in distribution systems. The Cuckoo Search (CS) algorithm is used to solve this mixed non linear integer optimization problem which aims to minimize losses in distribution systems. The proposed algorithm is evaluated using the IEEE 16-bus, IEEE 33-bus and IEEE 69-bus distributions systems. The results obtained show the effectiveness of the proposed technique.","PeriodicalId":442317,"journal":{"name":"2012 10th IEEE/IAS International Conference on Industry Applications","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133886911","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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