Pub Date : 1986-06-23DOI: 10.1109/PESC.1986.7415545
J. Koulischer, P. Mathys, G. Bingen
The goal of this study is to define the optimal PWM strategy adapted to a given variable-speed induction motor drive. A complete set of simulation programs performs steady-state and transient analysis of wave-forms. Some original PWM modes have been implemented on two digital modulators.
{"title":"Computer-aided choice of digital PWM strategies","authors":"J. Koulischer, P. Mathys, G. Bingen","doi":"10.1109/PESC.1986.7415545","DOIUrl":"https://doi.org/10.1109/PESC.1986.7415545","url":null,"abstract":"The goal of this study is to define the optimal PWM strategy adapted to a given variable-speed induction motor drive. A complete set of simulation programs performs steady-state and transient analysis of wave-forms. Some original PWM modes have been implemented on two digital modulators.","PeriodicalId":164857,"journal":{"name":"1986 17th Annual IEEE Power Electronics Specialists Conference","volume":"305 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116271124","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 : 1986-06-23DOI: 10.1109/PESC.1986.7415621
Slobodan Cuk, Zhe Zhang
A new coupled-inductor multiple air-gap structure is proposed and analyzed. These EI and EE core configurations eliminate many of the problems associated with the earlier single air-gap structures such as: high sensitivity of ripple currents to air-gap and/or turns ratio changes, complex winding arrangements and consequent high costs and inferior thermal characteristics. To facilitate the design, critical leakage parameter I is evaluated for a whole line of EI and EE cores.
{"title":"Coupled-inductor analysis and design","authors":"Slobodan Cuk, Zhe Zhang","doi":"10.1109/PESC.1986.7415621","DOIUrl":"https://doi.org/10.1109/PESC.1986.7415621","url":null,"abstract":"A new coupled-inductor multiple air-gap structure is proposed and analyzed. These EI and EE core configurations eliminate many of the problems associated with the earlier single air-gap structures such as: high sensitivity of ripple currents to air-gap and/or turns ratio changes, complex winding arrangements and consequent high costs and inferior thermal characteristics. To facilitate the design, critical leakage parameter I is evaluated for a whole line of EI and EE cores.","PeriodicalId":164857,"journal":{"name":"1986 17th Annual IEEE Power Electronics Specialists Conference","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129586247","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 : 1986-06-23DOI: 10.1109/PESC.1986.7415550
M. Stoisiek, D. Theis
MOS-GTOs represent a new generation of turn-off thyristors offering considerable advantages in the turn-off behaviour as compared to conventional GTOs. However, MOS-GTOs generally require two control electrodes for turn-on, which might be regarded as a disadvantage. This paper shows that in MOS-GTOs with a p-channel cathode structure it is possible to turn the thyristor on and off by controlling only just one MOS gate electrode. As a triggering current for turn-on the MOS capacitance displacement current is used. MOS-GTOs with current gain βnpn = 30 and gate delay times of tgd = 8 µs were realized. Turn-on occurs homogeneously over the entire device. One-dimensional simulations indicate that thyristors with tgd = 1 µs can be realized, provided that βnpn 100.
{"title":"Turn-on principles of MOS-GTO","authors":"M. Stoisiek, D. Theis","doi":"10.1109/PESC.1986.7415550","DOIUrl":"https://doi.org/10.1109/PESC.1986.7415550","url":null,"abstract":"MOS-GTOs represent a new generation of turn-off thyristors offering considerable advantages in the turn-off behaviour as compared to conventional GTOs. However, MOS-GTOs generally require two control electrodes for turn-on, which might be regarded as a disadvantage. This paper shows that in MOS-GTOs with a p-channel cathode structure it is possible to turn the thyristor on and off by controlling only just one MOS gate electrode. As a triggering current for turn-on the MOS capacitance displacement current is used. MOS-GTOs with current gain βnpn = 30 and gate delay times of tgd = 8 µs were realized. Turn-on occurs homogeneously over the entire device. One-dimensional simulations indicate that thyristors with tgd = 1 µs can be realized, provided that βnpn 100.","PeriodicalId":164857,"journal":{"name":"1986 17th Annual IEEE Power Electronics Specialists Conference","volume":"26 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132149101","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 : 1986-06-23DOI: 10.1109/PESC.1986.7415553
L. Lorenz, H. Amann
The switching behaviour of a BIMOS switching stage is investigated, taking into account the most important parasitic network and device parameters. Its short-circuit behaviour is also discussed and ways of improving it are presented. The power range is expanded by connecting power MOSFETs in parallel and extending the switching behaviour of the Darlington stage. The parallel-switching of FETs is also analysed. Possible ways of reducing dynamic and static losses are discussed in a power-loss treatment.
{"title":"Switching behaviour of a BIMOS switching stage","authors":"L. Lorenz, H. Amann","doi":"10.1109/PESC.1986.7415553","DOIUrl":"https://doi.org/10.1109/PESC.1986.7415553","url":null,"abstract":"The switching behaviour of a BIMOS switching stage is investigated, taking into account the most important parasitic network and device parameters. Its short-circuit behaviour is also discussed and ways of improving it are presented. The power range is expanded by connecting power MOSFETs in parallel and extending the switching behaviour of the Darlington stage. The parallel-switching of FETs is also analysed. Possible ways of reducing dynamic and static losses are discussed in a power-loss treatment.","PeriodicalId":164857,"journal":{"name":"1986 17th Annual IEEE Power Electronics Specialists Conference","volume":"4 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127085913","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 : 1986-06-23DOI: 10.1109/PESC.1986.7415590
G. Fregien
The application of GTO-thyristors requires special short-circuit protection equipment. A simple method based on the proportionality of turn-off current and storage time of a GTO is shown to protect GTO-thyristors against turn-off failure during a short circuit. Additionally, this method can be employed for overload protection, failure diagnosis and current monitoring.
{"title":"Current monitoring in power electronic equipment with GTO-thyristors","authors":"G. Fregien","doi":"10.1109/PESC.1986.7415590","DOIUrl":"https://doi.org/10.1109/PESC.1986.7415590","url":null,"abstract":"The application of GTO-thyristors requires special short-circuit protection equipment. A simple method based on the proportionality of turn-off current and storage time of a GTO is shown to protect GTO-thyristors against turn-off failure during a short circuit. Additionally, this method can be employed for overload protection, failure diagnosis and current monitoring.","PeriodicalId":164857,"journal":{"name":"1986 17th Annual IEEE Power Electronics Specialists Conference","volume":"145 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131666256","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 : 1986-06-23DOI: 10.1109/PESC.1986.7415556
Richard R. Miltenberger
An investigation of the dynamic effects of coupled output chokes on multiple output buck converters reveals the potential presence of two zeros in the plant equation. These zeros can have a significant effect on the loop dynamics of the converter depending upon the relative turns ratios of the transformer and the coupled choke.
{"title":"The effects of coupled output chokes on loop dynamics in multiple output converters","authors":"Richard R. Miltenberger","doi":"10.1109/PESC.1986.7415556","DOIUrl":"https://doi.org/10.1109/PESC.1986.7415556","url":null,"abstract":"An investigation of the dynamic effects of coupled output chokes on multiple output buck converters reveals the potential presence of two zeros in the plant equation. These zeros can have a significant effect on the loop dynamics of the converter depending upon the relative turns ratios of the transformer and the coupled choke.","PeriodicalId":164857,"journal":{"name":"1986 17th Annual IEEE Power Electronics Specialists Conference","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122065190","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 : 1986-06-23DOI: 10.1109/PESC.1986.7415579
A. Bhat, S. Dewan
The modeling, analysis and design of a high-frequency resonant converter using LCC type commutation circuit is presented. Constant current model and State space approach are used for the analysis. Closed form solutions are derived for the inverter under steady state conditions. Experimental results obtained from a prototype converter under different loading conditions are compared with the theory.
{"title":"Analysis and design of a high frequency resonant converter using LCC type commutation","authors":"A. Bhat, S. Dewan","doi":"10.1109/PESC.1986.7415579","DOIUrl":"https://doi.org/10.1109/PESC.1986.7415579","url":null,"abstract":"The modeling, analysis and design of a high-frequency resonant converter using LCC type commutation circuit is presented. Constant current model and State space approach are used for the analysis. Closed form solutions are derived for the inverter under steady state conditions. Experimental results obtained from a prototype converter under different loading conditions are compared with the theory.","PeriodicalId":164857,"journal":{"name":"1986 17th Annual IEEE Power Electronics Specialists Conference","volume":"140 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124885375","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 : 1986-06-23DOI: 10.1109/PESC.1986.7415583
T. Ninomiya, T. Higashi, K. Harada, N. Tsuya, T. Gohnai, Yukihiro Honda
The basic circuit of a push-pull parallel resonant converter with an input inductor is analyzed for the continuous conduction mode and the discontinuous conduction mode concerning the output-inductor current. It is found that the output voltage of this resonant converter is controlled by varying the switching frequency in the discontinuous conduction mode, while another power controller is required in the continuous conduction mode. The static and dynamic characteristics are examined analytically and experimenta1ly.
{"title":"Analysis of the static and dynamic characteristics of push-pull parallel resonant converters","authors":"T. Ninomiya, T. Higashi, K. Harada, N. Tsuya, T. Gohnai, Yukihiro Honda","doi":"10.1109/PESC.1986.7415583","DOIUrl":"https://doi.org/10.1109/PESC.1986.7415583","url":null,"abstract":"The basic circuit of a push-pull parallel resonant converter with an input inductor is analyzed for the continuous conduction mode and the discontinuous conduction mode concerning the output-inductor current. It is found that the output voltage of this resonant converter is controlled by varying the switching frequency in the discontinuous conduction mode, while another power controller is required in the continuous conduction mode. The static and dynamic characteristics are examined analytically and experimenta1ly.","PeriodicalId":164857,"journal":{"name":"1986 17th Annual IEEE Power Electronics Specialists Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130876554","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 : 1986-06-23DOI: 10.1109/PESC.1986.7415568
T. Ninomiya, M. Nakahara, H. Tajima, K. Harada
The generation mechanism of backward noise is analyzed for a forward dc-to-dc converter. Here the backward noise is defined as the switching noise which flows back to input terminals. Its generation process consists of several states and there are two modes depending on the characteristics of the switching elements used in the converter. The analysis is performed by deriving the high-frequency equivalent circuit corresponding to each state. The equivalent circuits include the parameters associated with the switching speed of a transistor and the recovery characteristics of a diode as well as inductive and capacitive parasitic parameters. As the result, the effects of these parameters on the backward noise are made clear quantitatively.
{"title":"Backward-noise generation in dc-to-dc converters","authors":"T. Ninomiya, M. Nakahara, H. Tajima, K. Harada","doi":"10.1109/PESC.1986.7415568","DOIUrl":"https://doi.org/10.1109/PESC.1986.7415568","url":null,"abstract":"The generation mechanism of backward noise is analyzed for a forward dc-to-dc converter. Here the backward noise is defined as the switching noise which flows back to input terminals. Its generation process consists of several states and there are two modes depending on the characteristics of the switching elements used in the converter. The analysis is performed by deriving the high-frequency equivalent circuit corresponding to each state. The equivalent circuits include the parameters associated with the switching speed of a transistor and the recovery characteristics of a diode as well as inductive and capacitive parasitic parameters. As the result, the effects of these parameters on the backward noise are made clear quantitatively.","PeriodicalId":164857,"journal":{"name":"1986 17th Annual IEEE Power Electronics Specialists Conference","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114632812","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 : 1986-06-23DOI: 10.1109/PESC.1986.7415619
John Rosa
Numerous power electronic applications necessitate the use of multiwinding transformers. Transformers having n windings per phase have (n−1)2 leakage inductances. Of these, n−1 are self inductances, the rest are mutuals. This paper presents an equivalent circuit for the multiwinding transformer and outlines a method of calculating the leakage inductances for a given transformer of specified winding structure and dimensions. Examples are presented illustrating the effect of winding arrangements on the leakage inductances.
{"title":"Calculation of flux linkages in multiwinding transformers","authors":"John Rosa","doi":"10.1109/PESC.1986.7415619","DOIUrl":"https://doi.org/10.1109/PESC.1986.7415619","url":null,"abstract":"Numerous power electronic applications necessitate the use of multiwinding transformers. Transformers having n windings per phase have (n−1)2 leakage inductances. Of these, n−1 are self inductances, the rest are mutuals. This paper presents an equivalent circuit for the multiwinding transformer and outlines a method of calculating the leakage inductances for a given transformer of specified winding structure and dimensions. Examples are presented illustrating the effect of winding arrangements on the leakage inductances.","PeriodicalId":164857,"journal":{"name":"1986 17th Annual IEEE Power Electronics Specialists Conference","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126299470","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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