Pub Date : 2014-05-14DOI: 10.1109/ECTICON.2014.6839860
Nassaree Benalie, W. Chonnaparamutt, Witsarut Supsi
The Intelligent Controller (IC) has been developed in Shoulder-Elbow-Forearm Robotics Economic rehabilitation system (SEFRE Rehab System). SEFRE Rehab System is composed of a robotic manipulator and an exoskeleton, i.e. Forearm Supportive Mechanism (FSM). The IC is the most intelligent software controller which is capable of controlling every module in the SEFRE Rehab System effectively. This paper will focus on the implementation details of IC and sFSM. sFSM, another autonomous controller, has been proposed and developed separately to control only FSM automatically. According to the control concept of SEFRE Rehab System in the previous paper, all important functions of IC have been developed and improved continuously. To understand IC more, IC scheme is presented to show IC capabilities such as robot and FSM communication, saftey control etc. To apply Dynamixel motor of FSM for a high torque application, e.g. elbow motor, a gearbox must be added as well as PID controller and round-counting software module as an encoder must be developed in sFSM. The SEFRE rehab system is designed to rehabilitate the individual joints and the combined joints for activities of daily life, so the synchronizations between Robot and FSM controlled by IC have been developed to control their motion naturally. The experiments are tested the performance of IC synchronization at some certain ranges of muscle weakness, these results show satisfied and good synchronizations between Robot and FSM in active and passive modes.
{"title":"Intelligent controller of SEFRE rehab system","authors":"Nassaree Benalie, W. Chonnaparamutt, Witsarut Supsi","doi":"10.1109/ECTICON.2014.6839860","DOIUrl":"https://doi.org/10.1109/ECTICON.2014.6839860","url":null,"abstract":"The Intelligent Controller (IC) has been developed in Shoulder-Elbow-Forearm Robotics Economic rehabilitation system (SEFRE Rehab System). SEFRE Rehab System is composed of a robotic manipulator and an exoskeleton, i.e. Forearm Supportive Mechanism (FSM). The IC is the most intelligent software controller which is capable of controlling every module in the SEFRE Rehab System effectively. This paper will focus on the implementation details of IC and sFSM. sFSM, another autonomous controller, has been proposed and developed separately to control only FSM automatically. According to the control concept of SEFRE Rehab System in the previous paper, all important functions of IC have been developed and improved continuously. To understand IC more, IC scheme is presented to show IC capabilities such as robot and FSM communication, saftey control etc. To apply Dynamixel motor of FSM for a high torque application, e.g. elbow motor, a gearbox must be added as well as PID controller and round-counting software module as an encoder must be developed in sFSM. The SEFRE rehab system is designed to rehabilitate the individual joints and the combined joints for activities of daily life, so the synchronizations between Robot and FSM controlled by IC have been developed to control their motion naturally. The experiments are tested the performance of IC synchronization at some certain ranges of muscle weakness, these results show satisfied and good synchronizations between Robot and FSM in active and passive modes.","PeriodicalId":347166,"journal":{"name":"2014 11th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116826992","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 : 2014-05-14DOI: 10.1109/ECTICON.2014.6839742
P. Saengudomlert
This paper considers the problem of logical topology selection in an IP-over-WDM network, with the objective to minimize the total power consumption used to support the traffic demands. While there are several power consuming devices in a backbone WDM network, it is assumed that major power consumption occurs at IP router ports, which are termination points of optical connections or lightpaths. The logical topology selection problem is first formulated as an integer linear programming (ILP) problem that is computationally difficult to solve. To focus on minimizing the power consumption, it is assumed that the network is not limited by available link capacities. Two systematic approaches to obtain a lower bound on the power consumption are considered, namely linear programming (LP) relaxation and Lagrangian relaxation. It is shown that both methods result in the same lower bound that corresponds to shortest path routing of traffic. A heuristic based on shortest path routing and pruning of unnecessary lightpaths is then evaluated using simulation results obtained from the heuristic in comparison to the baseline case in which the logical topology is taken to be the same as the physical topology.
{"title":"Power-aware logical topology selection for IP-over-WDM backbone networks based on per-lightpath power consumption model","authors":"P. Saengudomlert","doi":"10.1109/ECTICON.2014.6839742","DOIUrl":"https://doi.org/10.1109/ECTICON.2014.6839742","url":null,"abstract":"This paper considers the problem of logical topology selection in an IP-over-WDM network, with the objective to minimize the total power consumption used to support the traffic demands. While there are several power consuming devices in a backbone WDM network, it is assumed that major power consumption occurs at IP router ports, which are termination points of optical connections or lightpaths. The logical topology selection problem is first formulated as an integer linear programming (ILP) problem that is computationally difficult to solve. To focus on minimizing the power consumption, it is assumed that the network is not limited by available link capacities. Two systematic approaches to obtain a lower bound on the power consumption are considered, namely linear programming (LP) relaxation and Lagrangian relaxation. It is shown that both methods result in the same lower bound that corresponds to shortest path routing of traffic. A heuristic based on shortest path routing and pruning of unnecessary lightpaths is then evaluated using simulation results obtained from the heuristic in comparison to the baseline case in which the logical topology is taken to be the same as the physical topology.","PeriodicalId":347166,"journal":{"name":"2014 11th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114429712","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 : 2014-05-14DOI: 10.1109/ECTICON.2014.6839870
E. Khansalee, Yan Zhao, E. Leelarasmee, K. Nuanyai
The environment of the city is surrounded by a lot of radio frequency (RF) energy that is broadcasted by diverse wireless systems. In order to enhance the value of the energy more than the channels to communicate, the ambient RF energy harvesting system was designed to harvest and recycle the energy for many applications such as battery chargers, sensor devices and portable devices. The main element of the ambient RF energy harvesting system is a rectenna that is the combination of an antenna and a rectifying circuit. Even though the ambient RF energy is widely broadcasted with many systems, the energy is extremely low. Therefore, the high performance of the antenna and the rectifying circuit has to be designed for supporting the small incident power; also the number of frequency channels of the rectenna can enhance the performance and support different harvesting locations. This paper proposes a dual-band rectifier for RF energy harvesting systems that was designed to operate at 2.1 GHz and 2.45 GHz. The first channel can provide the maximum efficiency of 24% with 1.9 V of the output voltage at 10 dBm of input power. On the other hand, a maximum efficiency of 18% and 1.7 V of the output voltage can be achieved by the second channel at 10 dBm of input power.
{"title":"A dual-band rectifier for RF energy harvesting systems","authors":"E. Khansalee, Yan Zhao, E. Leelarasmee, K. Nuanyai","doi":"10.1109/ECTICON.2014.6839870","DOIUrl":"https://doi.org/10.1109/ECTICON.2014.6839870","url":null,"abstract":"The environment of the city is surrounded by a lot of radio frequency (RF) energy that is broadcasted by diverse wireless systems. In order to enhance the value of the energy more than the channels to communicate, the ambient RF energy harvesting system was designed to harvest and recycle the energy for many applications such as battery chargers, sensor devices and portable devices. The main element of the ambient RF energy harvesting system is a rectenna that is the combination of an antenna and a rectifying circuit. Even though the ambient RF energy is widely broadcasted with many systems, the energy is extremely low. Therefore, the high performance of the antenna and the rectifying circuit has to be designed for supporting the small incident power; also the number of frequency channels of the rectenna can enhance the performance and support different harvesting locations. This paper proposes a dual-band rectifier for RF energy harvesting systems that was designed to operate at 2.1 GHz and 2.45 GHz. The first channel can provide the maximum efficiency of 24% with 1.9 V of the output voltage at 10 dBm of input power. On the other hand, a maximum efficiency of 18% and 1.7 V of the output voltage can be achieved by the second channel at 10 dBm of input power.","PeriodicalId":347166,"journal":{"name":"2014 11th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114429934","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 : 2014-05-14DOI: 10.1109/ECTICON.2014.6839835
Y. Chawanonphithak, C. Phongcharoenpanich
Dual-band antenna covering IEEE 802.11a/b/g bands is presented using a miniaturized II-shaped monopole antennas with modified rectangular strip ground plane for dualband WLAN operation over the frequency band of 2.400-2.484 GHz, 5.150-5.350 GHz and 5.725-5.825GHz. The II-shaped monopole antenna and with modified rectangular ground plane are etched onto a piece of printed circuit board (PCB) with an overall size of 25 mm × 44 mm × 1.6 mm. This antenna can easily be fed by strip line to match impedance using a 50 ohm transmission line with SMA connector. The measured results show that the miniaturized antenna achieves a broad operating bandwidth of 2.26-2.89 GHz and 4.92-5.83 GHz for |S11|<; -10 dB and omnidirectional radiation pattern. The measured gains of the antenna from 2.400 to 2.484 GHz and 5.150 to 5.825 GHz frequencies are 1.3 dBi and 2.5 dBi, respectively.
{"title":"Miniaturized dual-band II-shaped monopole antennas with modified rectangular ground plane","authors":"Y. Chawanonphithak, C. Phongcharoenpanich","doi":"10.1109/ECTICON.2014.6839835","DOIUrl":"https://doi.org/10.1109/ECTICON.2014.6839835","url":null,"abstract":"Dual-band antenna covering IEEE 802.11a/b/g bands is presented using a miniaturized II-shaped monopole antennas with modified rectangular strip ground plane for dualband WLAN operation over the frequency band of 2.400-2.484 GHz, 5.150-5.350 GHz and 5.725-5.825GHz. The II-shaped monopole antenna and with modified rectangular ground plane are etched onto a piece of printed circuit board (PCB) with an overall size of 25 mm × 44 mm × 1.6 mm. This antenna can easily be fed by strip line to match impedance using a 50 ohm transmission line with SMA connector. The measured results show that the miniaturized antenna achieves a broad operating bandwidth of 2.26-2.89 GHz and 4.92-5.83 GHz for |S11|<; -10 dB and omnidirectional radiation pattern. The measured gains of the antenna from 2.400 to 2.484 GHz and 5.150 to 5.825 GHz frequencies are 1.3 dBi and 2.5 dBi, respectively.","PeriodicalId":347166,"journal":{"name":"2014 11th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132908170","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 : 2014-05-14DOI: 10.1109/ECTICON.2014.6839808
T. V. Dao, H. Nguyen, S. Chaitusaney, R. Chatthaworn
Rapid changes in the output of photovoltaic (PV) generations may lead to serious voltage fluctuation in distribution systems. This paper proposes a controlling method of only PV plants those have had active power changes to suppress the fluctuation. Without a requirement of high speed data exchange between the PV plant and the utility control center for voltage regulation, the proposed method helps a PV plant inject/absorb a proper amount of reactive power to/from the utility grid. Effectiveness of the proposed method is illustrated by a simulation in Matlab/Simulink.
{"title":"Local reactive power control of PV plants for voltage fluctuation mitigation","authors":"T. V. Dao, H. Nguyen, S. Chaitusaney, R. Chatthaworn","doi":"10.1109/ECTICON.2014.6839808","DOIUrl":"https://doi.org/10.1109/ECTICON.2014.6839808","url":null,"abstract":"Rapid changes in the output of photovoltaic (PV) generations may lead to serious voltage fluctuation in distribution systems. This paper proposes a controlling method of only PV plants those have had active power changes to suppress the fluctuation. Without a requirement of high speed data exchange between the PV plant and the utility control center for voltage regulation, the proposed method helps a PV plant inject/absorb a proper amount of reactive power to/from the utility grid. Effectiveness of the proposed method is illustrated by a simulation in Matlab/Simulink.","PeriodicalId":347166,"journal":{"name":"2014 11th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132863182","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 : 2014-05-14DOI: 10.1109/ECTICON.2014.6839773
Y. Sundarasaradula, A. Thanachayanont
This paper presents the design and realization of a low-noise, low-power, wide-dynamic-range CMOS logarithmic amplifier for cochlear implant system in a standard 0.18μm CMOS technology. The proposed logarithmic amplifier is based on the true piecewise linear function by using progressive-compression parallel-summation architecture. The overall circuit consumes only 9.1 μW from a 1.3 V single power supply voltage. The simulated input dynamic range is 80 dB, which covers the input amplitudes ranging from 10 μV to 100 mV. The simulated bandwidth of the amplifier is from 50 Hz to 24 kHz. The simulated total input-referred noise is 4.81 μV, integrated from 100 Hz to 10 kHz.
{"title":"A 1.3-V, 9.1μW wide-dynamic range logarithmic amplifier for cochlear implant system","authors":"Y. Sundarasaradula, A. Thanachayanont","doi":"10.1109/ECTICON.2014.6839773","DOIUrl":"https://doi.org/10.1109/ECTICON.2014.6839773","url":null,"abstract":"This paper presents the design and realization of a low-noise, low-power, wide-dynamic-range CMOS logarithmic amplifier for cochlear implant system in a standard 0.18μm CMOS technology. The proposed logarithmic amplifier is based on the true piecewise linear function by using progressive-compression parallel-summation architecture. The overall circuit consumes only 9.1 μW from a 1.3 V single power supply voltage. The simulated input dynamic range is 80 dB, which covers the input amplitudes ranging from 10 μV to 100 mV. The simulated bandwidth of the amplifier is from 50 Hz to 24 kHz. The simulated total input-referred noise is 4.81 μV, integrated from 100 Hz to 10 kHz.","PeriodicalId":347166,"journal":{"name":"2014 11th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130534467","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 : 2014-05-14DOI: 10.1109/ECTICON.2014.6839848
P. Reangsuntea, K. Naito, K. Mori, Hideo Kobayashi, P. Boonsrimuang
Inter-Carrier Interference (ICI) due to the Doppler frequency spread (DS) occurring in high time-varying multipath fading channel would lead the fatal degradation of Bit Error Rate (BER) performance in the data communications of using the Orthogonal Frequency Division Multiplexing (OFDM) technique. To achieve the potential performances of OFDM technique, it is essential to realize the higher accurate channel estimator in the time-varying multipath fading channels. This paper proposes a novel channel estimation method in conjunction with an ICI mitigation method which can achieve better channel estimation accuracy and BER performance even in the higher time-varying fading channels. The salient feature of proposed method is to employ the window function for the transmission time domain OFDM signal for improving the side-lobe of frequency spectrum response which can reduce the ICI relatively. This paper presents various simulation results in the high time-varying fading channels to demonstrate the effectiveness of proposed method as comparing with the conventional methods.
{"title":"Proposal of channel estimation method for OFDM systems under high mobile environments","authors":"P. Reangsuntea, K. Naito, K. Mori, Hideo Kobayashi, P. Boonsrimuang","doi":"10.1109/ECTICON.2014.6839848","DOIUrl":"https://doi.org/10.1109/ECTICON.2014.6839848","url":null,"abstract":"Inter-Carrier Interference (ICI) due to the Doppler frequency spread (DS) occurring in high time-varying multipath fading channel would lead the fatal degradation of Bit Error Rate (BER) performance in the data communications of using the Orthogonal Frequency Division Multiplexing (OFDM) technique. To achieve the potential performances of OFDM technique, it is essential to realize the higher accurate channel estimator in the time-varying multipath fading channels. This paper proposes a novel channel estimation method in conjunction with an ICI mitigation method which can achieve better channel estimation accuracy and BER performance even in the higher time-varying fading channels. The salient feature of proposed method is to employ the window function for the transmission time domain OFDM signal for improving the side-lobe of frequency spectrum response which can reduce the ICI relatively. This paper presents various simulation results in the high time-varying fading channels to demonstrate the effectiveness of proposed method as comparing with the conventional methods.","PeriodicalId":347166,"journal":{"name":"2014 11th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121735200","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 : 2014-05-14DOI: 10.1109/ECTICON.2014.6839820
Pontakorn Sonchan, Sakgasit Ramingwong
Risk management is an essential process in software project management. Risk identification and analysis are critical parts of risk management. However, both processes require extensive experience and knowledge to be efficiently performed. Several literatures suggest using checklists which can be used to aid risk identification. However, there is very little information which can guide the risk analysis. This paper extracts and classifies top risks from thirty most frequently cited and recently published literatures on software project risks. A further Delphi study also proposes potential impacts and probabilities of these risks. The results of this paper can be used as a guideline in risk identification and analysis processes on standard software development scenarios.
{"title":"Top twenty risks in software projects: A content analysis and Delphi study","authors":"Pontakorn Sonchan, Sakgasit Ramingwong","doi":"10.1109/ECTICON.2014.6839820","DOIUrl":"https://doi.org/10.1109/ECTICON.2014.6839820","url":null,"abstract":"Risk management is an essential process in software project management. Risk identification and analysis are critical parts of risk management. However, both processes require extensive experience and knowledge to be efficiently performed. Several literatures suggest using checklists which can be used to aid risk identification. However, there is very little information which can guide the risk analysis. This paper extracts and classifies top risks from thirty most frequently cited and recently published literatures on software project risks. A further Delphi study also proposes potential impacts and probabilities of these risks. The results of this paper can be used as a guideline in risk identification and analysis processes on standard software development scenarios.","PeriodicalId":347166,"journal":{"name":"2014 11th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122048056","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 : 2014-05-14DOI: 10.1109/ECTICON.2014.6839746
R. Phatthanakun, S. Promwikorn, W. Pummara, C. Sriphung, B. Sutapun, N. Chomnawang
This paper presents low-cost plastic micromolds fabricated by X-ray LIGA technology. High aspect ratio microstructures are constructed by X-ray lithography process and used as a master mold for microfluidic systems. The master mold is replicated by PDMS to be used as the second mold and then transferred their patterns to plastic mold using casting method. Finally, the plastic mold performs itself as a master mold for PDMS replication which can be attached on substrate applied for microfluidic systems by plasma bonding. Some example devices have been fabricated by this method and are demonstrated in this paper.
{"title":"Fabrication of low-cost plastic micromolds for microfluidic systems using X-ray LIGA","authors":"R. Phatthanakun, S. Promwikorn, W. Pummara, C. Sriphung, B. Sutapun, N. Chomnawang","doi":"10.1109/ECTICON.2014.6839746","DOIUrl":"https://doi.org/10.1109/ECTICON.2014.6839746","url":null,"abstract":"This paper presents low-cost plastic micromolds fabricated by X-ray LIGA technology. High aspect ratio microstructures are constructed by X-ray lithography process and used as a master mold for microfluidic systems. The master mold is replicated by PDMS to be used as the second mold and then transferred their patterns to plastic mold using casting method. Finally, the plastic mold performs itself as a master mold for PDMS replication which can be attached on substrate applied for microfluidic systems by plasma bonding. Some example devices have been fabricated by this method and are demonstrated in this paper.","PeriodicalId":347166,"journal":{"name":"2014 11th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON)","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122090237","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 : 2014-05-14DOI: 10.1109/ECTICON.2014.6839868
Alireza Niknam Kumle, S. Fathi, Siavash Taghipour Broujeni
Nowadays, the multi-level voltage source inverter (MLI) has widely used in industries due to its ability to generate high voltage staircase waveform which its magnitude, phase and frequency is controllable, Whereas, MLIs introduce harmonic to the network would led to power quality problem. This paper presents a novel meta-heuristic method known as Memetic algorithm (MA) to optimize harmonic contents of the multi-level converters supplied by adjustable non-equal DC sources. The aim of this paper is to reduce the lowest order harmonics of the waveform, besides, keep the fundamental component in its desirable value. High rate of convergence and precision are regarded as two significant benefits of the proposed technique. This method is general and applicable to multi-level inverters with any number of levels. As a case study, a 7-level inverter is analyzed. Also, this algorithm is successfully implemented on the 7-level three phase cascade multi-level inverter. Both simulation and experimental results validate effectiveness of the proposed method.
{"title":"Harmonic optimization in multi-level inverters by considering adjustable DC sources using Memetic algorithm","authors":"Alireza Niknam Kumle, S. Fathi, Siavash Taghipour Broujeni","doi":"10.1109/ECTICON.2014.6839868","DOIUrl":"https://doi.org/10.1109/ECTICON.2014.6839868","url":null,"abstract":"Nowadays, the multi-level voltage source inverter (MLI) has widely used in industries due to its ability to generate high voltage staircase waveform which its magnitude, phase and frequency is controllable, Whereas, MLIs introduce harmonic to the network would led to power quality problem. This paper presents a novel meta-heuristic method known as Memetic algorithm (MA) to optimize harmonic contents of the multi-level converters supplied by adjustable non-equal DC sources. The aim of this paper is to reduce the lowest order harmonics of the waveform, besides, keep the fundamental component in its desirable value. High rate of convergence and precision are regarded as two significant benefits of the proposed technique. This method is general and applicable to multi-level inverters with any number of levels. As a case study, a 7-level inverter is analyzed. Also, this algorithm is successfully implemented on the 7-level three phase cascade multi-level inverter. Both simulation and experimental results validate effectiveness of the proposed method.","PeriodicalId":347166,"journal":{"name":"2014 11th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122336205","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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