{"title":"A ZCS bi-directional flyback DC/DC converter using the leakage inductance of the coupled inductor","authors":"H. Chung, S. Hui, K. M. Chan, C. Chung","doi":"10.1109/APEC.2000.822808","DOIUrl":"https://doi.org/10.1109/APEC.2000.822808","url":null,"abstract":"This paper describes a zero-current-switched (ZCS) bi-directional flyback DC/DC converter. The methodology is based on replacing the output diode in the existing flyback converter with a controlled switch, acting as either a synchronous rectifier or a main power control switch in the corresponding power flow operation. By adding an auxiliary winding in the coupled inductor, a bi-directional switch, and a capacitor, the hard-switched design can be converted into a soft-switched one. The technique utilizes the leakage inductance in the flyback coupled inductor to achieve the ZCS of all switches in both power flow directions, leading to reduced switching losses, stresses, and electromagnetic interference. No extra active or passive voltage clamp circuits are required to suppress the voltage stress on the switches. The operating principles of the converter and experimental results are presented.","PeriodicalId":347959,"journal":{"name":"APEC 2000. Fifteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.00CH37058)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116307201","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}
{"title":"A new single phase power factor corrector converter","authors":"B. Vieira Borges, V. Anunciada","doi":"10.1109/APEC.2000.826103","DOIUrl":"https://doi.org/10.1109/APEC.2000.826103","url":null,"abstract":"This paper presents the basic principles of operation, the analysis, simulation and experimental results of a new single-phase power factor corrector circuit for AC-DC power supplies. This converter consists basically in a three diodes and capacitor arrangement connected at the output terminals of the input rectifier. The charge of these capacitors is forced by operating an electronic switch that controls the power flow from the AC line through an inductor with a secondary winding, the same way as in a flyback converter topology. This process enables input current shaping and with adequate control, sinusoidal input current is obtained. In order to validate the theoretical and simulation results, a 50 W lab prototype has been developed.","PeriodicalId":347959,"journal":{"name":"APEC 2000. Fifteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.00CH37058)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117060971","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}
{"title":"Integrated capacitor and converter package","authors":"B. A. Jordan, R.L. Spyker","doi":"10.1109/APEC.2000.822576","DOIUrl":"https://doi.org/10.1109/APEC.2000.822576","url":null,"abstract":"A small capacitor-based DC power supply was designed using a combination of bootstrapped and non-bootstrapped converter topologies. This design focused on start-up under load, low voltage performance, maximum energy-density and utilization of surface mount components. These were integrated onto a board mounted on configurations of 50 F, 2.5 V ultracapacitors.","PeriodicalId":347959,"journal":{"name":"APEC 2000. Fifteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.00CH37058)","volume":"135 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115686617","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}
{"title":"New inverter output filter topology for PWM motor drives","authors":"Y. Sozer, D. Torrey, S. Reva","doi":"10.1109/APEC.2000.822613","DOIUrl":"https://doi.org/10.1109/APEC.2000.822613","url":null,"abstract":"This paper presents a new inverter output filter topology for PWM motor drives. It is shown that the proposed filter effectively reduces high frequency harmonics which cause serious damage to the motor bearings and insulation. The proposed filter is comprised of a conventional RLC network cascaded with an LC trap filter. The LC trap, tuned to the inverter switching frequency is very effective in reducing the switching harmonics. By using this new topology the need for high damping resistance and low RLC cut-off frequency is eliminated. This reduces the phase shift in the current regulation loop and increases the filter efficiency. Experimental verification of the filter topology is provided with a 480 V inverter and a 25 HP permanent magnet synchronous motor. Space-vector predictive current regulation is implemented as an inner-loop current regulator for the outer-loop speed control using a digital signal processor. The effectiveness of the filter at different motor speeds is presented.","PeriodicalId":347959,"journal":{"name":"APEC 2000. Fifteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.00CH37058)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128178239","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}
R.J. Huljak, V.J. Thottuvelil, A. J. Marsh, B. Miller
{"title":"Where are power supplies headed?","authors":"R.J. Huljak, V.J. Thottuvelil, A. J. Marsh, B. Miller","doi":"10.1109/APEC.2000.826076","DOIUrl":"https://doi.org/10.1109/APEC.2000.826076","url":null,"abstract":"The invention of the transistor over fifty years ago, and the many advances in power semiconductor devices that followed have rapidly pushed switching power supplies to a ubiquitous presence in today's electronic world. Improvements in circuits, packaging and other components have also kept pace, helping make power supplies much smaller, cheaper and reliable. These advances are examined in three broad areas, powering architectures, AC/DC rectifiers and DC/DC converters, to set the stage for an examination of what the future might bring. By studying some of the fundamental aspects of power-supply technology, and understanding where the applications being powered are headed, the authors speculate on what advances are needed and delve into how component technologies must develop in the future. Then, based on the demanding needs of powering lower-voltage, higher-current and faster electronics in the future, the authors offer a power-supply technology roadmap. Their vision is for a future where the necessary advances come by means of much stronger partnerships between power-supply manufacturers, their customers and component suppliers.","PeriodicalId":347959,"journal":{"name":"APEC 2000. Fifteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.00CH37058)","volume":"192 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124327386","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}
{"title":"Sensorless vector control of induction motor based on a flux compensation with application to hoist crane","authors":"Junha Kim, K. Nam, Jinho Chung, Wong Sunwoo","doi":"10.1109/APEC.2000.826097","DOIUrl":"https://doi.org/10.1109/APEC.2000.826097","url":null,"abstract":"A practical sensorless vector control method for an induction motor is developed. Basically, the authors obtain the angle of the reference frame from the stator flux estimates that are obtained through integrating v/sub s/-R/sub s/i/sub s/. But this involves errors, especially in the low frequency range. The authors develop compensation schemes for flux magnitude and flux angle. The magnitude compensating term is obtained from the current error, while the angle compensating term is obtained from the real and reactive power relation. The usefulness of the proposed scheme is successfully demonstrated with a 110 kW inverter system for 40 ton hoist crane which requires 100% torque at 2/spl sim/3 Hz.","PeriodicalId":347959,"journal":{"name":"APEC 2000. Fifteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.00CH37058)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129862688","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}
{"title":"Current handling and thermal considerations in a high current semiconductor switch package","authors":"P. Dugdale, A. Woodworth","doi":"10.1109/APEC.2000.826117","DOIUrl":"https://doi.org/10.1109/APEC.2000.826117","url":null,"abstract":"In response to the need for a high current, low inductance, low resistance package, International Rectifier have designed the Supertab MOSFET. This new device is capable of carrying currents in excess of 200 A. The Supertab package is different from existing power MOSFET packages in that the source connection is made through a tab rather than a lead. This paper presents a discussion of the way in which a combination of experimental work and computer modelling has been used to develop this high current discrete semiconductor switch package.","PeriodicalId":347959,"journal":{"name":"APEC 2000. Fifteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.00CH37058)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133662347","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}
{"title":"A PWM full-bridge converter with load independent soft-switching capability","authors":"G. Moschopoulos, P. Jain","doi":"10.1109/APEC.2000.826087","DOIUrl":"https://doi.org/10.1109/APEC.2000.826087","url":null,"abstract":"Although the zero-voltage switched (ZVS) pulsewidth modulated (PWM) full-bridge (FB) converter can operate with soft-switching and fixed frequency control it loses its ZVS capability under light-load conditions. This paper examines the use of auxiliary circuits attached to the bottom switches of the standard ZVS-PWM-FB converter as a means of extending the ZVS range. The auxiliary circuits, each consisting of an active switch and passive components, operate for only a small portion of the switching cycle, and handle very little power. The basic operating principles of these type of modified ZVS-PWM-FB converters are explained in detail in the paper, and general guidelines for their design are given. A design procedure is derived and demonstrated on an example converter. The feasibility of this converter is shown with results obtained from an experimental prototype.","PeriodicalId":347959,"journal":{"name":"APEC 2000. Fifteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.00CH37058)","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114382044","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}
{"title":"Transformerless 4-leg current conditioner with voltage restoring capability","authors":"F. Carocci, H. Stemmler","doi":"10.1109/APEC.2000.822609","DOIUrl":"https://doi.org/10.1109/APEC.2000.822609","url":null,"abstract":"This paper proposes a transformerless 4-leg inverter, the multiple capabilities of which include current conditioning, voltage restoration and uninterruptible power supply. The effectiveness of the 4th leg is carefully outlined, while the system's general performance and flexibility is intensively investigated. Simulations are carried out and experimental results of a prototype are presented to validate the proposed approach.","PeriodicalId":347959,"journal":{"name":"APEC 2000. Fifteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.00CH37058)","volume":"467 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114411914","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}
{"title":"An improved ZVZCS PWM FB DC/DC converter using the modified energy recovery snubber","authors":"Eun-Soo Kim, K. Joe, Soon-Gu Park, Yoo-Ho Kim","doi":"10.1109/APEC.2000.826093","DOIUrl":"https://doi.org/10.1109/APEC.2000.826093","url":null,"abstract":"The conventional high frequency phase-shifted full bridge DC/DC converter has a disadvantage that a circulating current flows through transformer and switching devices during the freewheeling interval. Due to this circulating current, RMS current stress, conduction losses of transformer and switching devices are increased. To alleviate that problem, the paper proposes a circulating current free type high frequency soft switching phase-shifted full bridge (FB) DC/DC converter with the modified energy recovery snubber (ERS) attached at the secondary side of transformer. The modified energy recovery snubber (ERS) adopted in this study consists of four fast recovery diodes and two resonant capacitors.","PeriodicalId":347959,"journal":{"name":"APEC 2000. Fifteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.00CH37058)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114419881","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}