Pub Date : 2009-12-11DOI: 10.1109/INTLEC.2009.5351859
Ki-Bum Park, Chong-Eun Kim, G. Moon, M. Youn
A classical boost converter has a limited voltage step-up ratio because of its parasitic resistances, which does not make it suitable for high step-up applications. Therefore, to obtain a high step-up capability with high efficiency, non-isolated high step-up technique based on isolated type converters is introduced in this paper. By stacking the secondary sides in addition to the primary side, high step-up conversion ratio can be achieved. Moreover, a careful choice isolated converter provides zero-voltage-switching (ZVS), low voltage stress on devices, and continuous input current. The operational principle and characteristics of proposed converter are presented, and verified experimentally with a 140-W, 24-Vdc input, 150∼250-Vdc output prototype converter for a LED driver.
{"title":"Non-isolated high step-up converter based on boost integrated half-bridge converter","authors":"Ki-Bum Park, Chong-Eun Kim, G. Moon, M. Youn","doi":"10.1109/INTLEC.2009.5351859","DOIUrl":"https://doi.org/10.1109/INTLEC.2009.5351859","url":null,"abstract":"A classical boost converter has a limited voltage step-up ratio because of its parasitic resistances, which does not make it suitable for high step-up applications. Therefore, to obtain a high step-up capability with high efficiency, non-isolated high step-up technique based on isolated type converters is introduced in this paper. By stacking the secondary sides in addition to the primary side, high step-up conversion ratio can be achieved. Moreover, a careful choice isolated converter provides zero-voltage-switching (ZVS), low voltage stress on devices, and continuous input current. The operational principle and characteristics of proposed converter are presented, and verified experimentally with a 140-W, 24-Vdc input, 150∼250-Vdc output prototype converter for a LED driver.","PeriodicalId":445164,"journal":{"name":"INTELEC 2009 - 31st International Telecommunications Energy Conference","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125190965","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 : 2009-12-11DOI: 10.1109/INTLEC.2009.5351881
Won-cheol Lee, Bum-su Jun, Sanghun Park, Sang-seok Lee, C. Won
There are many increasing demands for efficient high power density of auxiliary power unit(APU) for high speed traction application. Many techniques have been proposed to measure the voltage flicker on the traditional pulse width modulation(PWM) inverter. This paper proposes a novel functionality of the static inverter on the APU to mitigate the voltage flicker and regulate the output voltage. A new control algorithm for the inverter based on the Hilbert transform(HT) is presented. The HT is employed as an effective technique for tracking the voltage flicker levels in APU systems. Simulation results are provided to verify the tracking capabilities of the HT and to evaluate the performance of the proposed DG interface for multi-function operation.
{"title":"A novel flicker mitigation method of auxiliary power unit for electric locomotive","authors":"Won-cheol Lee, Bum-su Jun, Sanghun Park, Sang-seok Lee, C. Won","doi":"10.1109/INTLEC.2009.5351881","DOIUrl":"https://doi.org/10.1109/INTLEC.2009.5351881","url":null,"abstract":"There are many increasing demands for efficient high power density of auxiliary power unit(APU) for high speed traction application. Many techniques have been proposed to measure the voltage flicker on the traditional pulse width modulation(PWM) inverter. This paper proposes a novel functionality of the static inverter on the APU to mitigate the voltage flicker and regulate the output voltage. A new control algorithm for the inverter based on the Hilbert transform(HT) is presented. The HT is employed as an effective technique for tracking the voltage flicker levels in APU systems. Simulation results are provided to verify the tracking capabilities of the HT and to evaluate the performance of the proposed DG interface for multi-function operation.","PeriodicalId":445164,"journal":{"name":"INTELEC 2009 - 31st International Telecommunications Energy Conference","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134471767","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 : 2009-12-11DOI: 10.1109/INTLEC.2009.5352096
Jun-Ho Lee, Hwa-chun Lee, Jun-Ho Choi, Sung‐Jun Park, Hae-Gon Nam
As the problem of final joining quality and environmental pollutants such as lead and toxic gases, the ultrasonic welding system is used increasingly in the industrial workspace. The ultrasonic welder is composed of the inverter, L-C filter for the mechanical oscillation to piezoelectric, booster and horn for amplification of mechanical displacement. Also the resonant frequency is changing by design of mechanical structure and characteristic of bonding material, therefore the PLL technique is required for controlling resonant frequency by digital controller. In this paper, inverter used 10kW full bridge and LC filter are simulated using PSIM software. Also, the hardware of ultrasonic welder and software for controlling resonant frequency are verified through the experiments.
{"title":"10kW industrial ultrasonic welder design","authors":"Jun-Ho Lee, Hwa-chun Lee, Jun-Ho Choi, Sung‐Jun Park, Hae-Gon Nam","doi":"10.1109/INTLEC.2009.5352096","DOIUrl":"https://doi.org/10.1109/INTLEC.2009.5352096","url":null,"abstract":"As the problem of final joining quality and environmental pollutants such as lead and toxic gases, the ultrasonic welding system is used increasingly in the industrial workspace. The ultrasonic welder is composed of the inverter, L-C filter for the mechanical oscillation to piezoelectric, booster and horn for amplification of mechanical displacement. Also the resonant frequency is changing by design of mechanical structure and characteristic of bonding material, therefore the PLL technique is required for controlling resonant frequency by digital controller. In this paper, inverter used 10kW full bridge and LC filter are simulated using PSIM software. Also, the hardware of ultrasonic welder and software for controlling resonant frequency are verified through the experiments.","PeriodicalId":445164,"journal":{"name":"INTELEC 2009 - 31st International Telecommunications Energy Conference","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133623266","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 : 2009-12-11DOI: 10.1109/INTLEC.2009.5351820
Jinbin Zhao, M. Sekine
In this paper, a novel two-switch forward converter topology for high step-down conversion is proposed. Comparing with the conventional two-switch forward converter, it uses two series inductors L1 and L2 to extend the duty cycle, and achieve the lower output voltage. In order to prove above results, detailed steady-state analysis is presented, and an input voltage 400V, output voltage 1.5V, output current 50A prototype converter was built. Finally, simulation results verify the theoretical analysis and show the significant advantages.
{"title":"A novel two-switch forward converter for high step-down conversion","authors":"Jinbin Zhao, M. Sekine","doi":"10.1109/INTLEC.2009.5351820","DOIUrl":"https://doi.org/10.1109/INTLEC.2009.5351820","url":null,"abstract":"In this paper, a novel two-switch forward converter topology for high step-down conversion is proposed. Comparing with the conventional two-switch forward converter, it uses two series inductors L1 and L2 to extend the duty cycle, and achieve the lower output voltage. In order to prove above results, detailed steady-state analysis is presented, and an input voltage 400V, output voltage 1.5V, output current 50A prototype converter was built. Finally, simulation results verify the theoretical analysis and show the significant advantages.","PeriodicalId":445164,"journal":{"name":"INTELEC 2009 - 31st International Telecommunications Energy Conference","volume":"241 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132925614","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 : 2009-12-11DOI: 10.1109/INTLEC.2009.5351833
M. Orabi
nowadays, manufacturers of power management integrated circuits (PMICs) are producing devices that integrate many of the functional blocks required in power supplies in single tiny chips. This paper highlights the circuit design considerations as a part of highly integrated, high switching frequency (few MHz range) PMICs optimized to be fabricated using CMOS fabrication technologies. Moreover, the effect of parasitic elements associated with integration of the driver and the power MOSFET gate parasitic elements on the performance of an integrated buck converter and its effect on the switching time and loss in power MOSFETs have been investigated. Finally, a driver has been tested using spice simulations to validate the theory and then experimental results have been presented.
{"title":"Circuit design considerations for integrated high switching frequency buck converter","authors":"M. Orabi","doi":"10.1109/INTLEC.2009.5351833","DOIUrl":"https://doi.org/10.1109/INTLEC.2009.5351833","url":null,"abstract":"nowadays, manufacturers of power management integrated circuits (PMICs) are producing devices that integrate many of the functional blocks required in power supplies in single tiny chips. This paper highlights the circuit design considerations as a part of highly integrated, high switching frequency (few MHz range) PMICs optimized to be fabricated using CMOS fabrication technologies. Moreover, the effect of parasitic elements associated with integration of the driver and the power MOSFET gate parasitic elements on the performance of an integrated buck converter and its effect on the switching time and loss in power MOSFETs have been investigated. Finally, a driver has been tested using spice simulations to validate the theory and then experimental results have been presented.","PeriodicalId":445164,"journal":{"name":"INTELEC 2009 - 31st International Telecommunications Energy Conference","volume":"262 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133565677","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 : 2009-12-11DOI: 10.1109/INTLEC.2009.5351855
Sihun Yang, S. Abe, M. Shoyama
This paper presents the design and implementation of LLC resonant converter using planar magnetic component. In the LLC resonant converter, ZVS turn-on and ZCS turn-off of MOSFETs and diode rectifiers can be achieved over the entire operating range, respectively. Therefore, the switching loss is reduced and we can operate the converter at higher switching frequency. At that frequency, planar magnetic component is a viable option. In this proposed converter, the magnetic component is integrated into advanced power conversion technique to implement a low-profile power supply for PDP application systems. An efficiency of about 96.7% was obtained.
{"title":"Design of LLC resonant converter using planar magnetic component","authors":"Sihun Yang, S. Abe, M. Shoyama","doi":"10.1109/INTLEC.2009.5351855","DOIUrl":"https://doi.org/10.1109/INTLEC.2009.5351855","url":null,"abstract":"This paper presents the design and implementation of LLC resonant converter using planar magnetic component. In the LLC resonant converter, ZVS turn-on and ZCS turn-off of MOSFETs and diode rectifiers can be achieved over the entire operating range, respectively. Therefore, the switching loss is reduced and we can operate the converter at higher switching frequency. At that frequency, planar magnetic component is a viable option. In this proposed converter, the magnetic component is integrated into advanced power conversion technique to implement a low-profile power supply for PDP application systems. An efficiency of about 96.7% was obtained.","PeriodicalId":445164,"journal":{"name":"INTELEC 2009 - 31st International Telecommunications Energy Conference","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114354574","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 : 2009-12-11DOI: 10.1109/INTLEC.2009.5351753
S. Hosseini, A. K. Sadigh, M. Farasat
In this paper a new 2-cell shunt active power filter (APF) is proposed. The proposed APF is capable of eliminating current harmonics and compensating reactive current, drawn by both nonlinear and linear loads. An online control method based on the discrete nonlinear model of multicell inverters is applied to APF. The main idea of the controller is the “tracking problem” of the reference current and the reference capacitor voltage by state variables. The state variables are controlled using an optimal feedback in a very fast and efficient manner. Moreover, a novel extraction system based on the synchronous reference frame is adopted as a part of the control system, and provides the required signals for harmonic filtering and reactive power compensation. The compensation principle is presented in details. The circuit is simulated using PSCAD/EMTDC software and simulation results are presented to validate the effectiveness of the novel control scheme and proposed APF.
{"title":"A new 2-cell shunt active power filter with compensation principle based on synchronous reference frame","authors":"S. Hosseini, A. K. Sadigh, M. Farasat","doi":"10.1109/INTLEC.2009.5351753","DOIUrl":"https://doi.org/10.1109/INTLEC.2009.5351753","url":null,"abstract":"In this paper a new 2-cell shunt active power filter (APF) is proposed. The proposed APF is capable of eliminating current harmonics and compensating reactive current, drawn by both nonlinear and linear loads. An online control method based on the discrete nonlinear model of multicell inverters is applied to APF. The main idea of the controller is the “tracking problem” of the reference current and the reference capacitor voltage by state variables. The state variables are controlled using an optimal feedback in a very fast and efficient manner. Moreover, a novel extraction system based on the synchronous reference frame is adopted as a part of the control system, and provides the required signals for harmonic filtering and reactive power compensation. The compensation principle is presented in details. The circuit is simulated using PSCAD/EMTDC software and simulation results are presented to validate the effectiveness of the novel control scheme and proposed APF.","PeriodicalId":445164,"journal":{"name":"INTELEC 2009 - 31st International Telecommunications Energy Conference","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115481422","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 : 2009-12-11DOI: 10.1109/INTLEC.2009.5351982
Hyun-Sik Song, Jin-Beom Jung, Baek-haeng Lee, Dong-hyun Shin, Byounghoon Kim, Yu-Cheol Park, Hoon Heo, Heejun Kim
There have been a number of methods proposed for accurate state of charge (SOC) estimation of a battery as an important role of the battery management System (BMS). However, adequate test data of batteries and BMS development costs must be taken into consideration before application in actual vehicles. In addition, different algorithms need to be adopted according to the type of energy storage device and system configuration. For a mild-HEV hybrid energy storage device that uses the ultracapacitor module and the VRLA battery, the small capacitance of ultracapacitor module makes accurate SOC difficult. Accordingly, this paper introduces a dynamic SOC estimation algorithm capable of SOC compensation of the ultracapacitor module even when there is current input and output. A cycle profile that simulates the operating conditions of a mild-HEV was applied to a vehicle simulator to verify the effectiveness of the proposed algorithm based on testing.
{"title":"A study on the dynamic SOC compensation of an ultracapacitor module for the hybrid energy storage system","authors":"Hyun-Sik Song, Jin-Beom Jung, Baek-haeng Lee, Dong-hyun Shin, Byounghoon Kim, Yu-Cheol Park, Hoon Heo, Heejun Kim","doi":"10.1109/INTLEC.2009.5351982","DOIUrl":"https://doi.org/10.1109/INTLEC.2009.5351982","url":null,"abstract":"There have been a number of methods proposed for accurate state of charge (SOC) estimation of a battery as an important role of the battery management System (BMS). However, adequate test data of batteries and BMS development costs must be taken into consideration before application in actual vehicles. In addition, different algorithms need to be adopted according to the type of energy storage device and system configuration. For a mild-HEV hybrid energy storage device that uses the ultracapacitor module and the VRLA battery, the small capacitance of ultracapacitor module makes accurate SOC difficult. Accordingly, this paper introduces a dynamic SOC estimation algorithm capable of SOC compensation of the ultracapacitor module even when there is current input and output. A cycle profile that simulates the operating conditions of a mild-HEV was applied to a vehicle simulator to verify the effectiveness of the proposed algorithm based on testing.","PeriodicalId":445164,"journal":{"name":"INTELEC 2009 - 31st International Telecommunications Energy Conference","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115529755","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 : 2009-12-11DOI: 10.1109/INTLEC.2009.5351807
E. Sakai, M. Nakahara
The output voltage of DC-DC converter contains the ripple and it substantially affects the frequency response although the ripple is usually neglected in the control circuit as PWM control. The authors already have clarified that the effect of the ripple is not ignorable for the frequency response and it causes the unusual characteristics. In this paper, we analyze the effect of the ripple in consideration of ESR of the output capacitor of the boost converter. As a result it has been found that the effect of ESR in the stability is different according to the shape of the slope direction of the ramp generator in the PWM circuit.
{"title":"Effect of ripple on frequency response characteristics of boost converter - Analysis in consideration of ESR of output capacitor -","authors":"E. Sakai, M. Nakahara","doi":"10.1109/INTLEC.2009.5351807","DOIUrl":"https://doi.org/10.1109/INTLEC.2009.5351807","url":null,"abstract":"The output voltage of DC-DC converter contains the ripple and it substantially affects the frequency response although the ripple is usually neglected in the control circuit as PWM control. The authors already have clarified that the effect of the ripple is not ignorable for the frequency response and it causes the unusual characteristics. In this paper, we analyze the effect of the ripple in consideration of ESR of the output capacitor of the boost converter. As a result it has been found that the effect of ESR in the stability is different according to the shape of the slope direction of the ramp generator in the PWM circuit.","PeriodicalId":445164,"journal":{"name":"INTELEC 2009 - 31st International Telecommunications Energy Conference","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121993865","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 : 2009-12-11DOI: 10.1109/INTLEC.2009.5351784
J. Rhee, Dong-Seok Lim, Sam-Young Chung
Following the effectuation of Kyoto Protocol in 2005, global warming began to receive a lot of attention worldwide and the role of green IT in reducing greenhouse gas (GHG) has become an important global issue. Korea, a late starter in this business, has also implemented several strategies and policies mostly led by government. However, there is currently no inventory system in Korean telecommunication sector that can categorize the GHG sinks/emission sources and emission amount/removed amount and manage them during the total procedure. Hence, this paper examines the green IT activities of developed countries and available inventory guidelines, with a purpose of suggesting direction for establishing inventory that fits the domestic situation. Such inventory system will contribute to building a fundamental stone for low carbon green growth in Korea and expanding Korean green IT technological share in global market.
{"title":"A proposal of GHG inventory implementation for telecommunication sector in Korea","authors":"J. Rhee, Dong-Seok Lim, Sam-Young Chung","doi":"10.1109/INTLEC.2009.5351784","DOIUrl":"https://doi.org/10.1109/INTLEC.2009.5351784","url":null,"abstract":"Following the effectuation of Kyoto Protocol in 2005, global warming began to receive a lot of attention worldwide and the role of green IT in reducing greenhouse gas (GHG) has become an important global issue. Korea, a late starter in this business, has also implemented several strategies and policies mostly led by government. However, there is currently no inventory system in Korean telecommunication sector that can categorize the GHG sinks/emission sources and emission amount/removed amount and manage them during the total procedure. Hence, this paper examines the green IT activities of developed countries and available inventory guidelines, with a purpose of suggesting direction for establishing inventory that fits the domestic situation. Such inventory system will contribute to building a fundamental stone for low carbon green growth in Korea and expanding Korean green IT technological share in global market.","PeriodicalId":445164,"journal":{"name":"INTELEC 2009 - 31st International Telecommunications Energy Conference","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123714774","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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