Pub Date : 2007-04-02DOI: 10.1109/PCCON.2007.372954
M. Antchev, M. Petkova, M. Petkov
In this paper, single-phase shunt active power filter (APF) controlled through hysteresis-current control is studied. A proposition is made to use the limitation on the maximum switching frequency of the power devices. This limitation increases stability to electromagnetic influences and facilitates filtering of the radio interference to the source network. In the paper, there are attached computer simulations' results and experimental oscilogrammes from the filter operation together with a combination of loads -linear (active inductive) and non-linear (single-phase bridge uncontrolled rectifier with capacitive load). The APF's control is based on DSP TMS320LF2407.
{"title":"Single-phase shunt active power filter using frequency limitation and hysteresis current control","authors":"M. Antchev, M. Petkova, M. Petkov","doi":"10.1109/PCCON.2007.372954","DOIUrl":"https://doi.org/10.1109/PCCON.2007.372954","url":null,"abstract":"In this paper, single-phase shunt active power filter (APF) controlled through hysteresis-current control is studied. A proposition is made to use the limitation on the maximum switching frequency of the power devices. This limitation increases stability to electromagnetic influences and facilitates filtering of the radio interference to the source network. In the paper, there are attached computer simulations' results and experimental oscilogrammes from the filter operation together with a combination of loads -linear (active inductive) and non-linear (single-phase bridge uncontrolled rectifier with capacitive load). The APF's control is based on DSP TMS320LF2407.","PeriodicalId":325362,"journal":{"name":"2007 Power Conversion Conference - Nagoya","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130598725","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 : 2007-04-02DOI: 10.1109/PCCON.2007.373065
H. Kiyotake, K. Shinohara, D. Katoh
In general, speed sensorless vector control system has a problem that an accurate speed and the torque control become difficult when the rotational speed lowers In this paper, we propose the method to estimate the rotor speed by making a pulse and counting a slot harmonics in the negative-sequence carrier signal current method and the removal method of the saturation induced harmonics with a high-pass filter. The feature of the proposed method is to be able to extract of a slot harmonics and to remove the saturation induced harmonics with an easy circuit. The summary is shown in Table 1 about the feature of the proposal method..
{"title":"A New Detection Method of Slot Harmonics for Speed Sensorless Vector Control of Induction Motors","authors":"H. Kiyotake, K. Shinohara, D. Katoh","doi":"10.1109/PCCON.2007.373065","DOIUrl":"https://doi.org/10.1109/PCCON.2007.373065","url":null,"abstract":"In general, speed sensorless vector control system has a problem that an accurate speed and the torque control become difficult when the rotational speed lowers In this paper, we propose the method to estimate the rotor speed by making a pulse and counting a slot harmonics in the negative-sequence carrier signal current method and the removal method of the saturation induced harmonics with a high-pass filter. The feature of the proposed method is to be able to extract of a slot harmonics and to remove the saturation induced harmonics with an easy circuit. The summary is shown in Table 1 about the feature of the proposal method..","PeriodicalId":325362,"journal":{"name":"2007 Power Conversion Conference - Nagoya","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130548763","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 : 2007-04-02DOI: 10.1109/PCCON.2007.372980
E. Morooka, H. Kubota
Induction motor drives without speed sensor have developed in these years. This paper presents flux position estimation of closed slot induction machines by using three phase triangular carrier waves. The proposed method is applicable to the sensor-less vector control of mass-produced closed slot induction machines at zero and low frequency. Experiments demonstrate sensor-less closed slot induction motor drives at zero frequency.
{"title":"Flux Position Estimation of Closed Slot Induction Machine with Three Phase Triangular Carrier Waves at Low Speeds","authors":"E. Morooka, H. Kubota","doi":"10.1109/PCCON.2007.372980","DOIUrl":"https://doi.org/10.1109/PCCON.2007.372980","url":null,"abstract":"Induction motor drives without speed sensor have developed in these years. This paper presents flux position estimation of closed slot induction machines by using three phase triangular carrier waves. The proposed method is applicable to the sensor-less vector control of mass-produced closed slot induction machines at zero and low frequency. Experiments demonstrate sensor-less closed slot induction motor drives at zero frequency.","PeriodicalId":325362,"journal":{"name":"2007 Power Conversion Conference - Nagoya","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122277012","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 : 2007-04-02DOI: 10.1109/PCCON.2007.373124
F. Lee, Ming Xu, Shuo Wang
Remarkable progresses have been made over the past decade In power conversion technologies, including advanced power semiconductor devices, power management ICs, innovative circuit topologies, and packaging and integrated system solutions. These technological advancements have been manifested in a wide range of products and applications with ever increasing performances, efficiency, and power density. This paper highlights some of the challenges and opportunities of power conversion technologies in the Distributed Power System (DPS) for computer, telecommunication and network products. Topics discussed in this paper include improved EMI filter design techniques to mitigate the detrimental effects of filter/converter parasitics; impacts of the operating frequency of PFC to the size and weight of EMI filter; power conversion architecture and potential simplification; high-frequency high-density AC/DC.
{"title":"High Density Approaches of AC to DC Converter of Distributed Power Systems (DPS) for Telecom and Computers","authors":"F. Lee, Ming Xu, Shuo Wang","doi":"10.1109/PCCON.2007.373124","DOIUrl":"https://doi.org/10.1109/PCCON.2007.373124","url":null,"abstract":"Remarkable progresses have been made over the past decade In power conversion technologies, including advanced power semiconductor devices, power management ICs, innovative circuit topologies, and packaging and integrated system solutions. These technological advancements have been manifested in a wide range of products and applications with ever increasing performances, efficiency, and power density. This paper highlights some of the challenges and opportunities of power conversion technologies in the Distributed Power System (DPS) for computer, telecommunication and network products. Topics discussed in this paper include improved EMI filter design techniques to mitigate the detrimental effects of filter/converter parasitics; impacts of the operating frequency of PFC to the size and weight of EMI filter; power conversion architecture and potential simplification; high-frequency high-density AC/DC.","PeriodicalId":325362,"journal":{"name":"2007 Power Conversion Conference - Nagoya","volume":"46 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120891300","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 : 2007-04-02DOI: 10.1109/PCCON.2007.373055
M. Lee, P. Wheeler, C. Klumpner
Variable voltage and variable frequency AC drives are widely used in commercial applications in order to control motion, improve efficiency of an electromechanical conversion chain etc. The major disadvantage of traditional AC-DC-AC power converter is the need for a bulky and limited lifetime energy storage electrolytic capacitor in the DC link. Alternatively, a matrix converter can be used, which is a forced-commutated AC-AC power converter topology that directly converts energy from an AC source to an AC load without the usage of an energy storage element. The most performant topology from this family is the three-level-output-stage matrix converter topology that can synthesize three-level voltage to improve the output performance in terms of reduced harmonic contents. This paper proposes a new modulation scheme for this topology. Realistic simulation results prove the ability of this converter topology to produce better output voltages when compared to a conventional matrix converter and also to maintain a sinusoidal input current.
{"title":"A New Modulation Method for the Three-Level-Output-Stage Matrix Converter","authors":"M. Lee, P. Wheeler, C. Klumpner","doi":"10.1109/PCCON.2007.373055","DOIUrl":"https://doi.org/10.1109/PCCON.2007.373055","url":null,"abstract":"Variable voltage and variable frequency AC drives are widely used in commercial applications in order to control motion, improve efficiency of an electromechanical conversion chain etc. The major disadvantage of traditional AC-DC-AC power converter is the need for a bulky and limited lifetime energy storage electrolytic capacitor in the DC link. Alternatively, a matrix converter can be used, which is a forced-commutated AC-AC power converter topology that directly converts energy from an AC source to an AC load without the usage of an energy storage element. The most performant topology from this family is the three-level-output-stage matrix converter topology that can synthesize three-level voltage to improve the output performance in terms of reduced harmonic contents. This paper proposes a new modulation scheme for this topology. Realistic simulation results prove the ability of this converter topology to produce better output voltages when compared to a conventional matrix converter and also to maintain a sinusoidal input current.","PeriodicalId":325362,"journal":{"name":"2007 Power Conversion Conference - Nagoya","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116479732","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 : 2007-04-02DOI: 10.1109/PCCON.2007.373088
R. Simanjorang, Y. Miura, T. Ise, S. Sugimoto, H. Fujita
A method for minimizing circulating current and balancing power transformer in loop distribution line of an industrial park is proposed. The proposed method uses a series type back-to-back (BTB) converter in loop distribution line of industrial park. Loop distribution line is formed by tying end of two radial lines by a looping wire. Looping wire has a re-closer circuit breaker to localize fault inside loop. Operation of the circuit breaker depends on the zero sequence voltage and current detection of series type BTB converter. This proposed method solves the problem of heavily loaded and lightly-loaded lines condition in distribution line autonomously, which results in lower utilization of transformers and increases losses in electricity system of the industrial park. By employing this proposed method, effective utilization of apparatus is realized by minimizing circulating current and balancing power of transformers in loop distribution line. Analysis and simulation results to validate the proposed method are presented in this paper.
{"title":"Application of Series Type BTB Converter for Minimizing Circulating Current and Balancing Power Transformers in Loop Distribution Lines","authors":"R. Simanjorang, Y. Miura, T. Ise, S. Sugimoto, H. Fujita","doi":"10.1109/PCCON.2007.373088","DOIUrl":"https://doi.org/10.1109/PCCON.2007.373088","url":null,"abstract":"A method for minimizing circulating current and balancing power transformer in loop distribution line of an industrial park is proposed. The proposed method uses a series type back-to-back (BTB) converter in loop distribution line of industrial park. Loop distribution line is formed by tying end of two radial lines by a looping wire. Looping wire has a re-closer circuit breaker to localize fault inside loop. Operation of the circuit breaker depends on the zero sequence voltage and current detection of series type BTB converter. This proposed method solves the problem of heavily loaded and lightly-loaded lines condition in distribution line autonomously, which results in lower utilization of transformers and increases losses in electricity system of the industrial park. By employing this proposed method, effective utilization of apparatus is realized by minimizing circulating current and balancing power of transformers in loop distribution line. Analysis and simulation results to validate the proposed method are presented in this paper.","PeriodicalId":325362,"journal":{"name":"2007 Power Conversion Conference - Nagoya","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129882917","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 : 2007-04-02DOI: 10.1109/PCCON.2007.373012
Jaeho Choi, H. Mok
This paper covers various power electronics education in Korea. In broad concept, they are composed of two methods, i.e. power electronics education in college as a part of formal curriculum and on-the-job (or field) training in industrial field to develop experienced engineers. In this paper, the simulation based education example of power electronics for students in the department of electrical engineering and engineers in companies is introduced. And also it is shown some practical attempts, which are called industrial electronics competition program sponsored by KIPE, to increase the interests of engineering students on power electronics.
{"title":"Simulation based Power Electronics Education in Korea","authors":"Jaeho Choi, H. Mok","doi":"10.1109/PCCON.2007.373012","DOIUrl":"https://doi.org/10.1109/PCCON.2007.373012","url":null,"abstract":"This paper covers various power electronics education in Korea. In broad concept, they are composed of two methods, i.e. power electronics education in college as a part of formal curriculum and on-the-job (or field) training in industrial field to develop experienced engineers. In this paper, the simulation based education example of power electronics for students in the department of electrical engineering and engineers in companies is introduced. And also it is shown some practical attempts, which are called industrial electronics competition program sponsored by KIPE, to increase the interests of engineering students on power electronics.","PeriodicalId":325362,"journal":{"name":"2007 Power Conversion Conference - Nagoya","volume":"365 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133904914","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 : 2007-04-02DOI: 10.1109/PCCON.2007.373023
Y. Hayashi, K. Takao, T. Shimizu, H. Ohashi
Power Electronics Research Center (PERC) proposes a novel circuit parameter design concept called "Power Converter Design Platform" for realizing high output power density (OPD) converters. The platform concept enables the exact power loss design by taking the effect of correlations among converter parameters into consideration under high speed switching operation. An experimental apparatus is fabricated based on the platform concept. Details of the power loss design methods for semiconductor power devices and passive filters are presented. The validity of proposed methods is confirmed. The platform concept for the circuit parameter design enables the optimal circuit parameter extraction under real circuit conditions.
{"title":"High Power Density Design Methodology","authors":"Y. Hayashi, K. Takao, T. Shimizu, H. Ohashi","doi":"10.1109/PCCON.2007.373023","DOIUrl":"https://doi.org/10.1109/PCCON.2007.373023","url":null,"abstract":"Power Electronics Research Center (PERC) proposes a novel circuit parameter design concept called \"Power Converter Design Platform\" for realizing high output power density (OPD) converters. The platform concept enables the exact power loss design by taking the effect of correlations among converter parameters into consideration under high speed switching operation. An experimental apparatus is fabricated based on the platform concept. Details of the power loss design methods for semiconductor power devices and passive filters are presented. The validity of proposed methods is confirmed. The platform concept for the circuit parameter design enables the optimal circuit parameter extraction under real circuit conditions.","PeriodicalId":325362,"journal":{"name":"2007 Power Conversion Conference - Nagoya","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134230920","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 : 2007-04-02DOI: 10.1109/PCCON.2007.372994
M. Sugimoto, H. Ueda, M. Kanechika, N. Soejima, T. Uesugi, T. Kachi
We report on the demonstration of normally off and normally on vertical AlGaN/GaN high electron mobility transistors (HEMTs). The normally off device shows the threshold voltage of 1.6 V. The normally on device shows the normalized on resistance of 1.48 mOmega-cm2 and the maximum drain current density of 3.9 kA/cm2. Before then, the dependence of threshold voltage on the thickness of n-GaN in the structure of AlGaN/n-GaN/p-GaN was studied experimentally.
{"title":"Vertical device operation of AlGaN/GaN HEMTs on free-standing n-GaN substrates","authors":"M. Sugimoto, H. Ueda, M. Kanechika, N. Soejima, T. Uesugi, T. Kachi","doi":"10.1109/PCCON.2007.372994","DOIUrl":"https://doi.org/10.1109/PCCON.2007.372994","url":null,"abstract":"We report on the demonstration of normally off and normally on vertical AlGaN/GaN high electron mobility transistors (HEMTs). The normally off device shows the threshold voltage of 1.6 V. The normally on device shows the normalized on resistance of 1.48 mOmega-cm2 and the maximum drain current density of 3.9 kA/cm2. Before then, the dependence of threshold voltage on the thickness of n-GaN in the structure of AlGaN/n-GaN/p-GaN was studied experimentally.","PeriodicalId":325362,"journal":{"name":"2007 Power Conversion Conference - Nagoya","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132930690","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 : 2007-04-02DOI: 10.1109/PCCON.2007.373014
J. Hamar, I. Nagy, H. Funato, Satoshi Ogasawara, O. Dranga, Y. Nishida
The current paper is dedicated to present browser-based multimedia-rich software tools and e-learning curriculum to support the design and modeling process of power electronics circuits and to explain sometimes rather sophisticated phenomena. Two projects will be discussed. The so-called Inetele project is financed by the Leonardo da Vinci program of the European Union(EU). It is a collaborative project between numerous EU universities and institutes to develop state-of-the art curriculum in electrical engineering. Another cooperative project with participation of Japanese, European and Australian institutes focuses especially on developing e-learning curriculum, interactive design and modeling tools, furthermore on development of a virtual laboratory. Snapshots from these two projects will be presented.
{"title":"Virtual Power Electronics: Novel Software Tools for Design, Modeling and Education","authors":"J. Hamar, I. Nagy, H. Funato, Satoshi Ogasawara, O. Dranga, Y. Nishida","doi":"10.1109/PCCON.2007.373014","DOIUrl":"https://doi.org/10.1109/PCCON.2007.373014","url":null,"abstract":"The current paper is dedicated to present browser-based multimedia-rich software tools and e-learning curriculum to support the design and modeling process of power electronics circuits and to explain sometimes rather sophisticated phenomena. Two projects will be discussed. The so-called Inetele project is financed by the Leonardo da Vinci program of the European Union(EU). It is a collaborative project between numerous EU universities and institutes to develop state-of-the art curriculum in electrical engineering. Another cooperative project with participation of Japanese, European and Australian institutes focuses especially on developing e-learning curriculum, interactive design and modeling tools, furthermore on development of a virtual laboratory. Snapshots from these two projects will be presented.","PeriodicalId":325362,"journal":{"name":"2007 Power Conversion Conference - Nagoya","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133218286","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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