Pub Date : 2003-06-15DOI: 10.1109/PESC.2003.1218131
C. Tse, Yufei Zhou, F. Lau, S. Qiu
This paper studies the "intermittent" chaos and subharmonics observed in switching DC/DC converters using a simple circuit model that describes possible unintended coupling of some weak spurious signal to the converter. The study shows that the signal strength and frequency of the intruding signal are vital parameters that affect the type of intermittent behavior and the period of intermittency. Simulations and experimental results are presented.
{"title":"Intermittent chaos in switching power supplies due to unintended coupling of spurious signals","authors":"C. Tse, Yufei Zhou, F. Lau, S. Qiu","doi":"10.1109/PESC.2003.1218131","DOIUrl":"https://doi.org/10.1109/PESC.2003.1218131","url":null,"abstract":"This paper studies the \"intermittent\" chaos and subharmonics observed in switching DC/DC converters using a simple circuit model that describes possible unintended coupling of some weak spurious signal to the converter. The study shows that the signal strength and frequency of the intruding signal are vital parameters that affect the type of intermittent behavior and the period of intermittency. Simulations and experimental results are presented.","PeriodicalId":236199,"journal":{"name":"IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03.","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114253748","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 : 2003-06-15DOI: 10.1109/PESC.2003.1217681
F. Peng, Z. Pan, S. Wang, A. Hiruma
This paper present a low-cost approach to power factor correction (PFC) for single-phase diode rectifiers using a series active filter. Comparing with the traditional PFC, the proposed PFC has lower requirements of power device ratings, which leads to lower cost and higher efficiency, and it also can eliminate the bulky inductor needed in the traditional PFC. The paper analyzes the topology, operation, and application issues of the proposed PFC. The control strategy is discussed and simulation results are provided. A 1 kW prototype is built up and the experimental results are presented to verify the analysis.
{"title":"Power factor correction using a series active filter","authors":"F. Peng, Z. Pan, S. Wang, A. Hiruma","doi":"10.1109/PESC.2003.1217681","DOIUrl":"https://doi.org/10.1109/PESC.2003.1217681","url":null,"abstract":"This paper present a low-cost approach to power factor correction (PFC) for single-phase diode rectifiers using a series active filter. Comparing with the traditional PFC, the proposed PFC has lower requirements of power device ratings, which leads to lower cost and higher efficiency, and it also can eliminate the bulky inductor needed in the traditional PFC. The paper analyzes the topology, operation, and application issues of the proposed PFC. The control strategy is discussed and simulation results are provided. A 1 kW prototype is built up and the experimental results are presented to verify the analysis.","PeriodicalId":236199,"journal":{"name":"IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03.","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121869002","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 : 2003-06-15DOI: 10.1109/PESC.2003.1216604
S. Kaboli, M. Zolghadri, A. Emadi
The flux and torque hysteresis bands are the only gains to be adjusted in direct torque control (DTC). The torque ripple and harmonic loss of motor and switching loss of inverter greatly influence them. Hence, these variables must be observed in the control process to maximize performance of the system. In this paper, the effects of flux and torque hysteresis bands on inverter switching loss, harmonic loss, and torque ripple of induction motor are investigated. In order to find their optimum values, a cost function consisting motor harmonic losses, torque ripples, and inverter switching losses is defined. Minimizing this cost function leads to the optimum value of the hysteresis bands of torque and flux controllers.
{"title":"Hysteresis band determination of direct torque controlled induction motor drives with torque ripple and motor-inverter loss considerations","authors":"S. Kaboli, M. Zolghadri, A. Emadi","doi":"10.1109/PESC.2003.1216604","DOIUrl":"https://doi.org/10.1109/PESC.2003.1216604","url":null,"abstract":"The flux and torque hysteresis bands are the only gains to be adjusted in direct torque control (DTC). The torque ripple and harmonic loss of motor and switching loss of inverter greatly influence them. Hence, these variables must be observed in the control process to maximize performance of the system. In this paper, the effects of flux and torque hysteresis bands on inverter switching loss, harmonic loss, and torque ripple of induction motor are investigated. In order to find their optimum values, a cost function consisting motor harmonic losses, torque ripples, and inverter switching losses is defined. Minimizing this cost function leads to the optimum value of the hysteresis bands of torque and flux controllers.","PeriodicalId":236199,"journal":{"name":"IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03.","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122026768","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 : 2003-06-15DOI: 10.1109/PESC.2003.1218136
Yaoping Liu, K. Smedley
This paper presents a new passive soft-switching dual-boost topology, which is suitable for higher power level (above 1 kW) single phase PFC rectification. No extra switch and control circuitry are needed. With a few add-on passive components, both power switches realize zero current turn on and zero voltage turn off. The operation principle and optimized design procedures of the topology are provided. A 1 kW prototype using optimized design parameters was built and the experimental results are given in the paper.
{"title":"A new passive soft-switching dual-boost topology for power factor correction","authors":"Yaoping Liu, K. Smedley","doi":"10.1109/PESC.2003.1218136","DOIUrl":"https://doi.org/10.1109/PESC.2003.1218136","url":null,"abstract":"This paper presents a new passive soft-switching dual-boost topology, which is suitable for higher power level (above 1 kW) single phase PFC rectification. No extra switch and control circuitry are needed. With a few add-on passive components, both power switches realize zero current turn on and zero voltage turn off. The operation principle and optimized design procedures of the topology are provided. A 1 kW prototype using optimized design parameters was built and the experimental results are given in the paper.","PeriodicalId":236199,"journal":{"name":"IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03.","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129496997","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 : 2003-06-15DOI: 10.1109/PESC.2003.1216591
A. le Roux, H. Mouton, H. Akagi
This paper deals with digital control of a series active filter integrated with a diode rectifier where the series active filter is controlled to function as a current source. A predictive current regulator is considered for the series active filter to achieve good ripple characteristics and predictable switching losses. The operating conditions, and the effect there of on the current regulator are considered and oversampling and prediction of the load voltage is suggested to improve the active filtering performance without increasing the switching frequency.
{"title":"Current regulation for a series active filter integrated with a diode rectifier","authors":"A. le Roux, H. Mouton, H. Akagi","doi":"10.1109/PESC.2003.1216591","DOIUrl":"https://doi.org/10.1109/PESC.2003.1216591","url":null,"abstract":"This paper deals with digital control of a series active filter integrated with a diode rectifier where the series active filter is controlled to function as a current source. A predictive current regulator is considered for the series active filter to achieve good ripple characteristics and predictable switching losses. The operating conditions, and the effect there of on the current regulator are considered and oversampling and prediction of the load voltage is suggested to improve the active filtering performance without increasing the switching frequency.","PeriodicalId":236199,"journal":{"name":"IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03.","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129865534","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 : 2003-06-15DOI: 10.1109/PESC.2003.1218168
X. Nan, C. Sullivan
The two best-known methods for calculating high-frequency winding loss in round-wire windings-the Dowell method and the Ferreira method-give significantly different results at high frequency. We apply 2-D finite-element method (FEM) simulations to evaluate the accuracy of each method for predicting proximity-effect losses. We find that both methods can have substantial errors, exceeding 60%. The Ferreira method, which is based on the exact Bessel-function solution for the eddy current in an isolated conducting cylinder subjected to a time-varying magnetic field, is found to be most accurate for loosely packed windings, whereas the Dowell method, which approximates winding layers comprising multiple turns of round wire with a rectangular conducting sheet, is most accurate for closely-packed windings. To achieve higher accuracy than is possible with either method alone, we introduce a new formula, based on modifying the Dowell method. Parameters in the new formula are chosen based on fitting our FEM simulation data. By expressing the results in terms of normalized parameters, we construct a model that can be used to determine proximity-effect loss for any round-wire winding with error under 2%.
{"title":"An improved calculation of proximity-effect loss in high-frequency windings of round conductors","authors":"X. Nan, C. Sullivan","doi":"10.1109/PESC.2003.1218168","DOIUrl":"https://doi.org/10.1109/PESC.2003.1218168","url":null,"abstract":"The two best-known methods for calculating high-frequency winding loss in round-wire windings-the Dowell method and the Ferreira method-give significantly different results at high frequency. We apply 2-D finite-element method (FEM) simulations to evaluate the accuracy of each method for predicting proximity-effect losses. We find that both methods can have substantial errors, exceeding 60%. The Ferreira method, which is based on the exact Bessel-function solution for the eddy current in an isolated conducting cylinder subjected to a time-varying magnetic field, is found to be most accurate for loosely packed windings, whereas the Dowell method, which approximates winding layers comprising multiple turns of round wire with a rectangular conducting sheet, is most accurate for closely-packed windings. To achieve higher accuracy than is possible with either method alone, we introduce a new formula, based on modifying the Dowell method. Parameters in the new formula are chosen based on fitting our FEM simulation data. By expressing the results in terms of normalized parameters, we construct a model that can be used to determine proximity-effect loss for any round-wire winding with error under 2%.","PeriodicalId":236199,"journal":{"name":"IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03.","volume":"42 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129881634","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 : 2003-06-15DOI: 10.1109/PESC.2003.1216794
J. Uys, H. J. Beukes
The purpose of a voltage controller is to produce stable three-phase output voltages with low distortion under all loading conditions. This paper presents the design of such a three-phase, closed-loop voltage controller, implementing a deadbeat controller on the output voltage and the inductor current. A digital signal processor is used to implement the digital closed-loop control algorithms. This, together with delays introduced by sampling the analog quantities, introduces a delay in the control law that causes system instability. The system model is augmented to compensate for these dynamics, hereby including a third deadbeat controlled variable. System stability is then ensured. Load current feed-forward is used to compensate for changes in the load current before the output voltages get distorted, in order to improve the output voltage waveform quality. Practical results show that the designed voltage controller can produce output voltage waveforms that can meet the specifications for balanced and unbalanced loads. This is verified by using a three-phase, four-wire, 250 kW inverter, which shows that the constructed pulse-width modulated control scheme can achieve fast dynamic response as well as low total harmonic distortion. Nonlinear loads, however, produce undesirable harmonics that cause large distortion in output voltage.
{"title":"Dynamic digital control schemes for three-phase UPS inverters","authors":"J. Uys, H. J. Beukes","doi":"10.1109/PESC.2003.1216794","DOIUrl":"https://doi.org/10.1109/PESC.2003.1216794","url":null,"abstract":"The purpose of a voltage controller is to produce stable three-phase output voltages with low distortion under all loading conditions. This paper presents the design of such a three-phase, closed-loop voltage controller, implementing a deadbeat controller on the output voltage and the inductor current. A digital signal processor is used to implement the digital closed-loop control algorithms. This, together with delays introduced by sampling the analog quantities, introduces a delay in the control law that causes system instability. The system model is augmented to compensate for these dynamics, hereby including a third deadbeat controlled variable. System stability is then ensured. Load current feed-forward is used to compensate for changes in the load current before the output voltages get distorted, in order to improve the output voltage waveform quality. Practical results show that the designed voltage controller can produce output voltage waveforms that can meet the specifications for balanced and unbalanced loads. This is verified by using a three-phase, four-wire, 250 kW inverter, which shows that the constructed pulse-width modulated control scheme can achieve fast dynamic response as well as low total harmonic distortion. Nonlinear loads, however, produce undesirable harmonics that cause large distortion in output voltage.","PeriodicalId":236199,"journal":{"name":"IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03.","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128467532","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 : 2003-06-15DOI: 10.1109/PESC.2003.1216779
M. Shoyama, G. Li, T. Ninomiya
An active-clamp circuit is an effective method to suppress the switching surge and to realize the soft switching in switching DC-DC converters. Recently, the common-source type active-clamp forward converter was presented to enable easy gate drive with a direct connection of the sources of the two n-channel MOSFET switches. In this paper, we apply the common-source type active-clamp circuit to various kinds of DC-DC converter topologies. The effectiveness of the common-mode noise reduction is experimentally confirmed and its mechanism is explained using an equivalent circuit.
{"title":"Application of common-source active-clamp circuit to various DC-DC converter topologies","authors":"M. Shoyama, G. Li, T. Ninomiya","doi":"10.1109/PESC.2003.1216779","DOIUrl":"https://doi.org/10.1109/PESC.2003.1216779","url":null,"abstract":"An active-clamp circuit is an effective method to suppress the switching surge and to realize the soft switching in switching DC-DC converters. Recently, the common-source type active-clamp forward converter was presented to enable easy gate drive with a direct connection of the sources of the two n-channel MOSFET switches. In this paper, we apply the common-source type active-clamp circuit to various kinds of DC-DC converter topologies. The effectiveness of the common-mode noise reduction is experimentally confirmed and its mechanism is explained using an equivalent circuit.","PeriodicalId":236199,"journal":{"name":"IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03.","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124705809","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 : 2003-06-15DOI: 10.1109/PESC.2003.1216613
C. Nesgaard, Michael A. E. Andersen, Nils Nielsen
With the continuous development of faster and cheaper microprocessors the field of applications for digital control is constantly expanding. Based on this trend we describe the analysis and implementation of multiple control laws within the same controller. Also, implemented within the control algorithm is a thermal monitoring scheme used for assessment of safe converter power throughput. An added benefit of this thermal monitoring is the possibility of software implemented analytic redundancy, which improves system fault resilience. Finally, reliability issues concerning the substitution of analog controllers with their digital counterparts are considered. The outline of the paper is divided into two segments - the first being an experimental analysis of the timing behavior by means of code optimization - the second being an examination of the dynamics of incorporating two control laws using multiple control parameters.
{"title":"Digitally controlled converter with dynamic change of control law and power throughput","authors":"C. Nesgaard, Michael A. E. Andersen, Nils Nielsen","doi":"10.1109/PESC.2003.1216613","DOIUrl":"https://doi.org/10.1109/PESC.2003.1216613","url":null,"abstract":"With the continuous development of faster and cheaper microprocessors the field of applications for digital control is constantly expanding. Based on this trend we describe the analysis and implementation of multiple control laws within the same controller. Also, implemented within the control algorithm is a thermal monitoring scheme used for assessment of safe converter power throughput. An added benefit of this thermal monitoring is the possibility of software implemented analytic redundancy, which improves system fault resilience. Finally, reliability issues concerning the substitution of analog controllers with their digital counterparts are considered. The outline of the paper is divided into two segments - the first being an experimental analysis of the timing behavior by means of code optimization - the second being an examination of the dynamics of incorporating two control laws using multiple control parameters.","PeriodicalId":236199,"journal":{"name":"IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03.","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121305520","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 : 2003-06-15DOI: 10.1109/PESC.2003.1218330
Y. Xiao, H. Shah, Z. Parrilla, T. P. Chow, T. Jahns, R. Gutmann
This paper presents the development of an integrated power packaging platform featuring power dies and driver components integration using flex-circuit interconnection and flip-chip soldering technology. The packaging platform that was previously demonstrated suitably for 42 V/16 A automotive applications is extended to 400 V/10 A motor-drive application, with the electrical performance measured at double-pulse and 10% duty-ratio conditions. The switching characteristics of three different IGBT modules implemented with flip-chip dies or discrete commercial packages on flex-circuitry are evaluated.
{"title":"Integrated power electronics modules for 400 V/10 A motor-drive applications using flip-chip flex-circuit technology","authors":"Y. Xiao, H. Shah, Z. Parrilla, T. P. Chow, T. Jahns, R. Gutmann","doi":"10.1109/PESC.2003.1218330","DOIUrl":"https://doi.org/10.1109/PESC.2003.1218330","url":null,"abstract":"This paper presents the development of an integrated power packaging platform featuring power dies and driver components integration using flex-circuit interconnection and flip-chip soldering technology. The packaging platform that was previously demonstrated suitably for 42 V/16 A automotive applications is extended to 400 V/10 A motor-drive application, with the electrical performance measured at double-pulse and 10% duty-ratio conditions. The switching characteristics of three different IGBT modules implemented with flip-chip dies or discrete commercial packages on flex-circuitry are evaluated.","PeriodicalId":236199,"journal":{"name":"IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03.","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116323751","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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