Pub Date : 1999-03-14DOI: 10.1109/APEC.1999.749497
A. Fernández, J. Sebastián, F. Linera, L. Alvarez, J. Arau
In order to comply with IEC-1000-3-2, a single stage AC-to-DC half-bridge with complementary-control (HBCC) converter with an active input current shaper (AICS) is proposed in this paper. The principle of operation of the AICS is based on a proposed input current shaping method (the series connection of a voltage source and a loss-free resistor between the input rectifier and the bulk capacitor). Moreover, the HBCC converter presents excellent features for low output voltage conversion due to the fact that it is possible to use self-driven synchronous rectification on it. In this paper, both the HBCC and the AICS are combined to obtain a single stage AC-to-DC converter that complies with IEC 1000-3-2 regulations with a high efficiency and at a very low cost.
{"title":"Single stage AC-to-DC converter with self-driven synchronous rectification that complies with IEC-1000-3-2 regulations","authors":"A. Fernández, J. Sebastián, F. Linera, L. Alvarez, J. Arau","doi":"10.1109/APEC.1999.749497","DOIUrl":"https://doi.org/10.1109/APEC.1999.749497","url":null,"abstract":"In order to comply with IEC-1000-3-2, a single stage AC-to-DC half-bridge with complementary-control (HBCC) converter with an active input current shaper (AICS) is proposed in this paper. The principle of operation of the AICS is based on a proposed input current shaping method (the series connection of a voltage source and a loss-free resistor between the input rectifier and the bulk capacitor). Moreover, the HBCC converter presents excellent features for low output voltage conversion due to the fact that it is possible to use self-driven synchronous rectification on it. In this paper, both the HBCC and the AICS are combined to obtain a single stage AC-to-DC converter that complies with IEC 1000-3-2 regulations with a high efficiency and at a very low cost.","PeriodicalId":287192,"journal":{"name":"APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130681242","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 : 1999-03-14DOI: 10.1109/APEC.1999.750440
R. Gules, I. Barbi, E.M. Simoes
A high-frequency lighting system for a fluorescent lamp is introduced in this paper. The characteristics of the proposed lighting system are high performance, high power factor with low input current harmonic distortion, dimming capability, low current lamps crest factor, and lower cost when compared with the traditional system with similar characteristics. The use of this system in place of the conventional electromagnetic ballast results in lower power consumption and reduced maintenance cost, because the electronic system has higher efficiency and longer lamp lifetime than the electromagnetic ballast. In comparison with the conventional electronic ballast, the proposed system presents a significant reduction of cost. This reduction becomes more meaningful with the growing of the lamp number. The description of the lighting system, design procedure and experimental results taken from a 1.2 kW prototype are included in the paper. The proposed lighting system is composed of a high power-factor rectifier that supplies a high-frequency zero-voltage-switching (ZVS) inverter. The output voltage of the AC-DC converter is regulated, maintaining the power of the lamps constant, even for large variations in the utility voltage.
{"title":"A 1.2 kW electronic ballast for multiple lamps, with dimming capability and high-power-factor","authors":"R. Gules, I. Barbi, E.M. Simoes","doi":"10.1109/APEC.1999.750440","DOIUrl":"https://doi.org/10.1109/APEC.1999.750440","url":null,"abstract":"A high-frequency lighting system for a fluorescent lamp is introduced in this paper. The characteristics of the proposed lighting system are high performance, high power factor with low input current harmonic distortion, dimming capability, low current lamps crest factor, and lower cost when compared with the traditional system with similar characteristics. The use of this system in place of the conventional electromagnetic ballast results in lower power consumption and reduced maintenance cost, because the electronic system has higher efficiency and longer lamp lifetime than the electromagnetic ballast. In comparison with the conventional electronic ballast, the proposed system presents a significant reduction of cost. This reduction becomes more meaningful with the growing of the lamp number. The description of the lighting system, design procedure and experimental results taken from a 1.2 kW prototype are included in the paper. The proposed lighting system is composed of a high power-factor rectifier that supplies a high-frequency zero-voltage-switching (ZVS) inverter. The output voltage of the AC-DC converter is regulated, maintaining the power of the lamps constant, even for large variations in the utility voltage.","PeriodicalId":287192,"journal":{"name":"APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130842556","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 : 1999-03-14DOI: 10.1109/APEC.1999.750473
A.M. El-Tamaly, H. El-Tamaly, E. Cengelci, P. Enjeti, E. Muljadi
In this paper, a low cost PWM power converter for a variable speed wind turbine generator (WTG) is discussed. A six-switch PWM converter is utilized to convert a three-phase power from a WTG to a single-phase electric utility. The proposed converter consists of two stages. The first stage is a variable frequency PWM converter with 4-IGBTs to control the output power of the generator. The second stage employs 2-IGBTs to return the power to the electric utility. These two stages have common DC-link. The utility output current is sinusoidal with a good quality. Suitable PWM control via space vector modulation is designed to control the generator. Current regulated PWM is used to control the utility side. Results from the simulation of the power converter are presented in this paper. The proposed converter is suitable for utility interface of WTGs up to 20 kW ratings.
{"title":"Low cost PWM converter for utility interface of variable speed wind turbine generators","authors":"A.M. El-Tamaly, H. El-Tamaly, E. Cengelci, P. Enjeti, E. Muljadi","doi":"10.1109/APEC.1999.750473","DOIUrl":"https://doi.org/10.1109/APEC.1999.750473","url":null,"abstract":"In this paper, a low cost PWM power converter for a variable speed wind turbine generator (WTG) is discussed. A six-switch PWM converter is utilized to convert a three-phase power from a WTG to a single-phase electric utility. The proposed converter consists of two stages. The first stage is a variable frequency PWM converter with 4-IGBTs to control the output power of the generator. The second stage employs 2-IGBTs to return the power to the electric utility. These two stages have common DC-link. The utility output current is sinusoidal with a good quality. Suitable PWM control via space vector modulation is designed to control the generator. Current regulated PWM is used to control the utility side. Results from the simulation of the power converter are presented in this paper. The proposed converter is suitable for utility interface of WTGs up to 20 kW ratings.","PeriodicalId":287192,"journal":{"name":"APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128760379","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 : 1999-03-14DOI: 10.1109/APEC.1999.749503
H. Tanaka, T. Ninomiya, Y. Okabe, T. Zaitsu
This paper presents the measured results of the output noise voltage and the spectrum of reflected conduction noise of a ZVS PWM series resonant power converter, and compares these noise characteristics with those of the conventional ZVS PWM forward power converter. As a consequence, it is clarified that the ZVS-PWM series resonant power converter achieves extremely low noise characteristics.
{"title":"Low-noise characteristics of a ZVS-PWM controlled series resonant converter with active clamp and synchronous rectification","authors":"H. Tanaka, T. Ninomiya, Y. Okabe, T. Zaitsu","doi":"10.1109/APEC.1999.749503","DOIUrl":"https://doi.org/10.1109/APEC.1999.749503","url":null,"abstract":"This paper presents the measured results of the output noise voltage and the spectrum of reflected conduction noise of a ZVS PWM series resonant power converter, and compares these noise characteristics with those of the conventional ZVS PWM forward power converter. As a consequence, it is clarified that the ZVS-PWM series resonant power converter achieves extremely low noise characteristics.","PeriodicalId":287192,"journal":{"name":"APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128786720","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 : 1999-03-14DOI: 10.1109/APEC.1999.749714
Y. Murai, Ji Cheng, S. Sugimoto, M. Yoshida
A resonant type soft-switched/switched-reluctance motor drive circuit using capacitors is proposed. Since the circuit performs soft-switching by resonating a capacitor and a motor winding, the voltage across the winding can be higher than twice the DC source voltage. Hence the circuit produces less EMI due to the application of soft-switching, and the output torque is increased by means of higher voltage. Moreover, because the proposed circuit utilizes only one series switching device between the DC source and the winding, system efficiency is also increased.
{"title":"A capacitor-boosted, soft-switched switched-reluctance motor drive","authors":"Y. Murai, Ji Cheng, S. Sugimoto, M. Yoshida","doi":"10.1109/APEC.1999.749714","DOIUrl":"https://doi.org/10.1109/APEC.1999.749714","url":null,"abstract":"A resonant type soft-switched/switched-reluctance motor drive circuit using capacitors is proposed. Since the circuit performs soft-switching by resonating a capacitor and a motor winding, the voltage across the winding can be higher than twice the DC source voltage. Hence the circuit produces less EMI due to the application of soft-switching, and the output torque is increased by means of higher voltage. Moreover, because the proposed circuit utilizes only one series switching device between the DC source and the winding, system efficiency is also increased.","PeriodicalId":287192,"journal":{"name":"APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285)","volume":"167 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123277041","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 : 1999-03-14DOI: 10.1109/APEC.1999.749505
K. Tse, H. Chung, S. Hui, H. C. So
This paper addresses a comparative investigation on the use of random modulation schemes for DC/DC power converters. The modulation schemes under investigation include randomized pulse position modulation, randomized pulse width modulation and randomized carrier frequency modulation with fixed and variable duty cycle. The study emphasizes the suitability and applicability of each scheme in DC/DC power converters, the randomness level on the effectiveness of spreading the dominating frequencies in constant frequency pulse width modulation scheme, and the low-frequency power spectral density (PSD) of each scheme. Validity of analyzes is confirmed experimentally by using a DC/DC buck converter, where the PSD of the output for each scheme is presented.
{"title":"A comparative study of using random switching schemes for DC/DC converters","authors":"K. Tse, H. Chung, S. Hui, H. C. So","doi":"10.1109/APEC.1999.749505","DOIUrl":"https://doi.org/10.1109/APEC.1999.749505","url":null,"abstract":"This paper addresses a comparative investigation on the use of random modulation schemes for DC/DC power converters. The modulation schemes under investigation include randomized pulse position modulation, randomized pulse width modulation and randomized carrier frequency modulation with fixed and variable duty cycle. The study emphasizes the suitability and applicability of each scheme in DC/DC power converters, the randomness level on the effectiveness of spreading the dominating frequencies in constant frequency pulse width modulation scheme, and the low-frequency power spectral density (PSD) of each scheme. Validity of analyzes is confirmed experimentally by using a DC/DC buck converter, where the PSD of the output for each scheme is presented.","PeriodicalId":287192,"journal":{"name":"APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126398806","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 : 1999-03-14DOI: 10.1109/APEC.1999.749722
K.H. Yuen, M. Pong, W. Lo, Zhuolin Ye
It is essential to model nonlinear traction power converter loads for the harmonic analysis of traction systems. A behavioral model in the frequency domain to represent electric railway vehicles based on testing and measurements is proposed for harmonic analysis. The harmonic current characteristics are represented by a set of polynomials generated from cubic smoothing spline interpolation. The purpose of this paper is to report and discuss the development of an electric railway model for harmonic analysis and demonstrate results from the simulation with this train load model. System simulation based on this model is performed and the results match satisfactorily with field measurements.
{"title":"Modeling of electric railway vehicle for harmonic analysis of traction power-supply system using spline interpolation in frequency domain","authors":"K.H. Yuen, M. Pong, W. Lo, Zhuolin Ye","doi":"10.1109/APEC.1999.749722","DOIUrl":"https://doi.org/10.1109/APEC.1999.749722","url":null,"abstract":"It is essential to model nonlinear traction power converter loads for the harmonic analysis of traction systems. A behavioral model in the frequency domain to represent electric railway vehicles based on testing and measurements is proposed for harmonic analysis. The harmonic current characteristics are represented by a set of polynomials generated from cubic smoothing spline interpolation. The purpose of this paper is to report and discuss the development of an electric railway model for harmonic analysis and demonstrate results from the simulation with this train load model. System simulation based on this model is performed and the results match satisfactorily with field measurements.","PeriodicalId":287192,"journal":{"name":"APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126973242","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 : 1999-03-14DOI: 10.1109/APEC.1999.749513
Jian Wang, A. Witulski, J.L. Vollin, T. Phelps, G. Cardwell
The conventional model for multiwinding transformers is difficult to relate to its physical construction, and the measurement of the model parameters is difficult and unreliable. In this paper a physically-based electrical model of a high voltage multi-winding transformer is presented. Each component in the electrical model corresponds to a physical quantity of the transformer. A method is also presented to calculate the leakage inductance for nonuniformly spaced windings, which store significant energy in the flux in the radial field. Also, the parameters can be directly measured on experimental prototypes. The experimental results closely match the predicted results.
{"title":"Derivation, calculation and measurement of parameters for a multi-winding transformer electrical model","authors":"Jian Wang, A. Witulski, J.L. Vollin, T. Phelps, G. Cardwell","doi":"10.1109/APEC.1999.749513","DOIUrl":"https://doi.org/10.1109/APEC.1999.749513","url":null,"abstract":"The conventional model for multiwinding transformers is difficult to relate to its physical construction, and the measurement of the model parameters is difficult and unreliable. In this paper a physically-based electrical model of a high voltage multi-winding transformer is presented. Each component in the electrical model corresponds to a physical quantity of the transformer. A method is also presented to calculate the leakage inductance for nonuniformly spaced windings, which store significant energy in the flux in the radial field. Also, the parameters can be directly measured on experimental prototypes. The experimental results closely match the predicted results.","PeriodicalId":287192,"journal":{"name":"APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121794742","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 : 1999-03-14DOI: 10.1109/APEC.1999.749701
B. Çakır, Ali Bekir Yildiz, N. Abut, N. Inanç
In this paper, the authors propose a new control method of a separately excited DC traction motor using fuzzy logic. The design of a fuzzy logic controller for a DC motor drive, which produces the traction moment, is illustrated and implemented. The drive system has been simulated and results have been compared with those obtained by a conventional PID controller. The superior results in the drive performance, which are achieved by fuzzy logic controller, are provided. The proposed controller exhibits superior transient and steady state performance compared to the usual PID controllers.
{"title":"DC motor control by using computer based fuzzy technique","authors":"B. Çakır, Ali Bekir Yildiz, N. Abut, N. Inanç","doi":"10.1109/APEC.1999.749701","DOIUrl":"https://doi.org/10.1109/APEC.1999.749701","url":null,"abstract":"In this paper, the authors propose a new control method of a separately excited DC traction motor using fuzzy logic. The design of a fuzzy logic controller for a DC motor drive, which produces the traction moment, is illustrated and implemented. The drive system has been simulated and results have been compared with those obtained by a conventional PID controller. The superior results in the drive performance, which are achieved by fuzzy logic controller, are provided. The proposed controller exhibits superior transient and steady state performance compared to the usual PID controllers.","PeriodicalId":287192,"journal":{"name":"APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127601955","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 : 1999-03-14DOI: 10.1109/APEC.1999.749727
Xiaoming Yuan, I. Barbi
This paper proposes a new diode clamping multilevel Inverter, which gets rid of the need for series association of the clamping diodes in the conventional diode clamping multilevel inverter. The new diode clamping inverter utilizes the same number of switches and diodes as the conventional one for synthesizing an inverter of a given level. Operation fundamentals, clamping mechanism as well as experimental verifications are presented.
{"title":"A new diode clamping multilevel inverter","authors":"Xiaoming Yuan, I. Barbi","doi":"10.1109/APEC.1999.749727","DOIUrl":"https://doi.org/10.1109/APEC.1999.749727","url":null,"abstract":"This paper proposes a new diode clamping multilevel Inverter, which gets rid of the need for series association of the clamping diodes in the conventional diode clamping multilevel inverter. The new diode clamping inverter utilizes the same number of switches and diodes as the conventional one for synthesizing an inverter of a given level. Operation fundamentals, clamping mechanism as well as experimental verifications are presented.","PeriodicalId":287192,"journal":{"name":"APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127797532","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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