Pub Date : 2005-06-01DOI: 10.1109/LPEL.2005.853245
Provides a listing of current society officers.
提供当前协会官员的列表。
{"title":"IEEE Power Electronics Society Information","authors":"","doi":"10.1109/LPEL.2005.853245","DOIUrl":"https://doi.org/10.1109/LPEL.2005.853245","url":null,"abstract":"Provides a listing of current society officers.","PeriodicalId":100635,"journal":{"name":"IEEE Power Electronics Letters","volume":"3 2","pages":"c3-c3"},"PeriodicalIF":0.0,"publicationDate":"2005-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/LPEL.2005.853245","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50328387","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 : 2005-03-01DOI: 10.1109/LPEL.2004.842402
Heng Deng;R. Oruganti;D. Srinivasan
With the popularity of micro-processors, digital controllers are widely used in uninterruptible power supply (UPS) inverters. These digital control systems of UPS inverters require a time interval for sampling and computation, which sometimes affects the performance of inverters. In this paper, the problem of time delay in digital control of a UPS inverter is discussed. Then two novel pulsewidth modulation (PWM) methods, the two-polarity PWM method and the asymmetric PWM method, are proposed to handle the time-delay problem. Both of these PWM methods can achieve a wide range of duty ratio between 0.05-0.95, which is independent of inverter model. Furthermore, they are easy to implement using a digital micro-controller. Experimental results are presented in the paper to verify feasibility of the proposed PWM methods.
{"title":"PWM methods to handle time delay in digital control of a UPS inverter","authors":"Heng Deng;R. Oruganti;D. Srinivasan","doi":"10.1109/LPEL.2004.842402","DOIUrl":"https://doi.org/10.1109/LPEL.2004.842402","url":null,"abstract":"With the popularity of micro-processors, digital controllers are widely used in uninterruptible power supply (UPS) inverters. These digital control systems of UPS inverters require a time interval for sampling and computation, which sometimes affects the performance of inverters. In this paper, the problem of time delay in digital control of a UPS inverter is discussed. Then two novel pulsewidth modulation (PWM) methods, the two-polarity PWM method and the asymmetric PWM method, are proposed to handle the time-delay problem. Both of these PWM methods can achieve a wide range of duty ratio between 0.05-0.95, which is independent of inverter model. Furthermore, they are easy to implement using a digital micro-controller. Experimental results are presented in the paper to verify feasibility of the proposed PWM methods.","PeriodicalId":100635,"journal":{"name":"IEEE Power Electronics Letters","volume":"3 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2005-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/LPEL.2004.842402","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49974358","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 : 2005-03-01DOI: 10.1109/LPEL.2005.845169
S.S.M. Chan;H.S.H. Chung;S.Y.R. Hui
A hybrid lamp power control scheme for dimmable electronic ballasts is proposed. Apart from adjusting the brightness of the lamp, the proposed method can also minimize the ambient temperature effect on light output. Instead of regulating the lamp current, the proposed method is based on regulating the power supplying the lamp. First, the dimming operation is achieved by regulating the dc voltage at the ballast inverter input. Second, variation of the lamp power (due to the temperature effect) is regulated by sensing the inverter average input current to adjust the switching frequency of the inverter. An 18 W prototype has been built and tested. The lamp power and luminous output of the prototype at the ambient temperature from 5/spl deg/C to 35/spl deg/C have been studied.
{"title":"A lamp power control scheme for dimmable electronic ballasts to minimize the temperature effect on the lamp brightness","authors":"S.S.M. Chan;H.S.H. Chung;S.Y.R. Hui","doi":"10.1109/LPEL.2005.845169","DOIUrl":"https://doi.org/10.1109/LPEL.2005.845169","url":null,"abstract":"A hybrid lamp power control scheme for dimmable electronic ballasts is proposed. Apart from adjusting the brightness of the lamp, the proposed method can also minimize the ambient temperature effect on light output. Instead of regulating the lamp current, the proposed method is based on regulating the power supplying the lamp. First, the dimming operation is achieved by regulating the dc voltage at the ballast inverter input. Second, variation of the lamp power (due to the temperature effect) is regulated by sensing the inverter average input current to adjust the switching frequency of the inverter. An 18 W prototype has been built and tested. The lamp power and luminous output of the prototype at the ambient temperature from 5/spl deg/C to 35/spl deg/C have been studied.","PeriodicalId":100635,"journal":{"name":"IEEE Power Electronics Letters","volume":"3 1","pages":"34-39"},"PeriodicalIF":0.0,"publicationDate":"2005-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/LPEL.2005.845169","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49974361","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 : 2005-03-01DOI: 10.1109/LPEL.2004.842361
Kyo-Beum Lee;F. Blaabjerg
This paper presents a new method to compensate the nonlinearities for matrix converter drives. The nonlinearities of matrix converter drives such as commutation delay, turn-on and turn-off time of the switching devices, and on-state switching device voltage drop is corrected by a new matrix converter model using the direction of current. The proposed method does not need any additional hardware or complicated software and it is easy to realize by applying the algorithm to the conventional vector control. The proposed compensation method is applied for high-performance induction motor drives using a 3-kW matrix converter system without a speed sensor. Experimental results show the proposed method provides good compensating characteristics.
{"title":"A nonlinearity compensation method for a matrix converter drive","authors":"Kyo-Beum Lee;F. Blaabjerg","doi":"10.1109/LPEL.2004.842361","DOIUrl":"https://doi.org/10.1109/LPEL.2004.842361","url":null,"abstract":"This paper presents a new method to compensate the nonlinearities for matrix converter drives. The nonlinearities of matrix converter drives such as commutation delay, turn-on and turn-off time of the switching devices, and on-state switching device voltage drop is corrected by a new matrix converter model using the direction of current. The proposed method does not need any additional hardware or complicated software and it is easy to realize by applying the algorithm to the conventional vector control. The proposed compensation method is applied for high-performance induction motor drives using a 3-kW matrix converter system without a speed sensor. Experimental results show the proposed method provides good compensating characteristics.","PeriodicalId":100635,"journal":{"name":"IEEE Power Electronics Letters","volume":"3 1","pages":"19-23"},"PeriodicalIF":0.0,"publicationDate":"2005-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/LPEL.2004.842361","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49974365","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 : 2005-03-01DOI: 10.1109/LPEL.2005.846681
Provides instructions and guidelines to prospective authors who wish to submit manuscripts.
为希望提交手稿的潜在作者提供说明和指导。
{"title":"IEEE Power Electronics Letters Information for authors","authors":"","doi":"10.1109/LPEL.2005.846681","DOIUrl":"https://doi.org/10.1109/LPEL.2005.846681","url":null,"abstract":"Provides instructions and guidelines to prospective authors who wish to submit manuscripts.","PeriodicalId":100635,"journal":{"name":"IEEE Power Electronics Letters","volume":"3 1","pages":"41-42"},"PeriodicalIF":0.0,"publicationDate":"2005-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/LPEL.2005.846681","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49974363","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 : 2005-03-01DOI: 10.1109/LPEL.2005.846678
Provides a listing of current society officers.
提供现时社会人员的名单。
{"title":"IEEE Power Electronics Letters publication information","authors":"","doi":"10.1109/LPEL.2005.846678","DOIUrl":"https://doi.org/10.1109/LPEL.2005.846678","url":null,"abstract":"Provides a listing of current society officers.","PeriodicalId":100635,"journal":{"name":"IEEE Power Electronics Letters","volume":"3 1","pages":"c2-c2"},"PeriodicalIF":0.0,"publicationDate":"2005-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/LPEL.2005.846678","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49974359","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 : 2005-03-01DOI: 10.1109/LPEL.2004.843266
In the above-named letter [ibid., vol. 2, pp. 113-16, Dec. 2004], the title of Section II was incorrectly edited. It should have read "Control in CCM."
{"title":"Erratum to \"Variable-frequency predictive digital current mode control\"","authors":"","doi":"10.1109/LPEL.2004.843266","DOIUrl":"https://doi.org/10.1109/LPEL.2004.843266","url":null,"abstract":"In the above-named letter [ibid., vol. 2, pp. 113-16, Dec. 2004], the title of Section II was incorrectly edited. It should have read \"Control in CCM.\"","PeriodicalId":100635,"journal":{"name":"IEEE Power Electronics Letters","volume":"3 1","pages":"40-40"},"PeriodicalIF":0.0,"publicationDate":"2005-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/LPEL.2004.843266","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49974362","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 : 2005-03-01DOI: 10.1109/LPEL.2005.846682
Authors must enclose a signed copy of this form when submitting manuscripts to the Editor of this publication.
作者在向本出版物的编辑提交稿件时，必须附上本表格的签名副本。
{"title":"IEEE copyright form","authors":"","doi":"10.1109/LPEL.2005.846682","DOIUrl":"https://doi.org/10.1109/LPEL.2005.846682","url":null,"abstract":"Authors must enclose a signed copy of this form when submitting manuscripts to the Editor of this publication.","PeriodicalId":100635,"journal":{"name":"IEEE Power Electronics Letters","volume":"3 1","pages":"43-44"},"PeriodicalIF":0.0,"publicationDate":"2005-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/LPEL.2005.846682","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49974364","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 : 2005-03-01DOI: 10.1109/LPEL.2004.842319
Ke Jin;Xinbo Ruan;Fuxin Liu
This paper proposes an improved zero-voltage-switching pulsewidth-modulation (ZVS PWM) three-level converter, which is improved from the original ZVS PWM three-level converter by merely exchanging the position of the resonant inductance and the transformer, such that the transformer is connected with the lagging switches. The improved converter has several advantages over the original, e.g., the clamping diodes conduct only once in a switching period, and the resonant inductance current is smaller in zero state, leading to a higher efficiency and reduced duty-cycle loss. A blocking capacitor is usually introduced to the primary side to prevent the transformer from saturating. This paper analyzes the effects of the blocking capacitor in different positions, and a best scheme is determined. A 2.5-kW prototype converter verifies the effectiveness of the improved converter and the best scheme for the blocking capacitor.
{"title":"Improved voltage clamping scheme for ZVS PWM three-level converter","authors":"Ke Jin;Xinbo Ruan;Fuxin Liu","doi":"10.1109/LPEL.2004.842319","DOIUrl":"https://doi.org/10.1109/LPEL.2004.842319","url":null,"abstract":"This paper proposes an improved zero-voltage-switching pulsewidth-modulation (ZVS PWM) three-level converter, which is improved from the original ZVS PWM three-level converter by merely exchanging the position of the resonant inductance and the transformer, such that the transformer is connected with the lagging switches. The improved converter has several advantages over the original, e.g., the clamping diodes conduct only once in a switching period, and the resonant inductance current is smaller in zero state, leading to a higher efficiency and reduced duty-cycle loss. A blocking capacitor is usually introduced to the primary side to prevent the transformer from saturating. This paper analyzes the effects of the blocking capacitor in different positions, and a best scheme is determined. A 2.5-kW prototype converter verifies the effectiveness of the improved converter and the best scheme for the blocking capacitor.","PeriodicalId":100635,"journal":{"name":"IEEE Power Electronics Letters","volume":"3 1","pages":"14-18"},"PeriodicalIF":0.0,"publicationDate":"2005-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/LPEL.2004.842319","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49974366","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 : 2005-03-01DOI: 10.1109/LPEL.2005.846680
This page or pages intentionally left blank.
有意留白的这一页或几页。
{"title":"IEEE Power Electronics Letters blank page","authors":"","doi":"10.1109/LPEL.2005.846680","DOIUrl":"https://doi.org/10.1109/LPEL.2005.846680","url":null,"abstract":"This page or pages intentionally left blank.","PeriodicalId":100635,"journal":{"name":"IEEE Power Electronics Letters","volume":"3 1","pages":"c4-c4"},"PeriodicalIF":0.0,"publicationDate":"2005-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/LPEL.2005.846680","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49974370","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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