{"title":"Push-pull current-fed multiple-output regulated wide-input-range DC/DC power converter with only one inductor and with 0 to 100% switch duty ratio: operation at duty ratio below 50%","authors":"R. Redl, N. Sokal","doi":"10.1109/PESC.1981.7083640","DOIUrl":"https://doi.org/10.1109/PESC.1981.7083640","url":null,"abstract":"The circuit has only one inductor for any number of outputs, one transformer and low sensitivity to transformer volt-second unbalance, only two power switches, and no need for two power switches in cascade. It is suitable for operation from 0 to <100% switch duty ratio (buck-like or boost-like action), accomodating a very wide range of input voltage. A previous paper [2] gave design equations for operation at duty ratios of 50% or more (boost-like operation). That analysis is extended here to include duty ratios below 50% (buck-like operation). Unusual features of the circuit are described and the most-important design equations are presented.","PeriodicalId":165849,"journal":{"name":"1981 IEEE Power Electronics Specialists Conference","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115630748","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":"Simulation of the conducted emc in spacecraft performance prediction : the ESA EMC computer programme","authors":"A. Capel, J. Ferrante","doi":"10.1109/PESC.1981.7083632","DOIUrl":"https://doi.org/10.1109/PESC.1981.7083632","url":null,"abstract":"This paper describes the computer program, ESA-EMC, and its application in the case of the SIRIO-2 spacecraft. The advantages of this software are that it constitutes an interactive program, capable of being run on a mini-computer of the HP 21-MX type. The organisation of the program is such that simulation of configurations can be introduced by means of network topology, tabulated data, transfer function or state representation. The application of the SIRIO-2 spacecraft constitutes its valiadtion, and is detailed in the second half of the study.","PeriodicalId":165849,"journal":{"name":"1981 IEEE Power Electronics Specialists Conference","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122846951","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":"Effects of stray capacitances between transformer windings on the noise characteristics in switching power converters","authors":"K. Harada, T. Ninomiya, Hisanobu Kakihara","doi":"10.1109/PESC.1981.7083631","DOIUrl":"https://doi.org/10.1109/PESC.1981.7083631","url":null,"abstract":"In switching-mode power converters, transformers are frequently used for the dc isolation between input and output terminals. The transformer has parasitic effects such as leakage inductances and stray capacitances of windings. These parasitic effects cause the complexity of noise problems in power converters. Particularly in the transformer with nonunity turns ration of windings, the description of the noise characteristics becomes more complicated due to the stray capacitances between windings. This paper presents a high-frequency equivalent circuit of the two-winding transformer with nonunity turns ration, and describes the noise transmission characteristics of a dc-to-dc converter with a transformer. Furthermore the extension of this equivalent circuit to the three-winding transformer and the cross-noise characteristics are discussed. The above discussion are followed by the experimental results.","PeriodicalId":165849,"journal":{"name":"1981 IEEE Power Electronics Specialists Conference","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123916377","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 high voltage, high power pulsed TWT power supply for space application","authors":"P. Sopper","doi":"10.1109/PESC.1981.7083654","DOIUrl":"https://doi.org/10.1109/PESC.1981.7083654","url":null,"abstract":"The power supply presented is used to operate a pulsed TWT in a microwave experiment, which will be flown during the first Spacelab (Spaceshuttle) mission. Various high voltages up to 10 KV at a pulsed power of 9 KW are provided by the supply. The design features of power conversion, high voltage insulation, pulse generation and protection circuitry are described and test results are presented.","PeriodicalId":165849,"journal":{"name":"1981 IEEE Power Electronics Specialists Conference","volume":"292 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124203584","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":"Time-varying feedback gains for power circuits with active waveshaping","authors":"M. Schlecht","doi":"10.1109/PESC.1981.7083624","DOIUrl":"https://doi.org/10.1109/PESC.1981.7083624","url":null,"abstract":"This paper presents a line interfaced inverter that employs a dc-dc converter to actively shape its ac current waveform. The duty cycle applied to this converter to control the current is determined in a closed loop fashion. The incremental dynamic response of the power circuit is found to be highly dependent on the ac voltage and current waveforms and therefore varies on a 60 Hz basis. With fixed feedback gains this variance would give closed loop poles that moved during the cycle. To avoid the problems that a time-varying system response would cause, a novel control scheme is proposed. This scheme uses periodically varying feedback gains to counteract the power circuit's time dependent response in a way that gives closed loop poles that do not move. Results of a Parity Simulation are included to verify the validity of this approach.","PeriodicalId":165849,"journal":{"name":"1981 IEEE Power Electronics Specialists Conference","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115169602","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":"Instabilities in current-mode controlled switching voltage regulators","authors":"R. Redl, I. Novak","doi":"10.1109/PESC.1981.7083621","DOIUrl":"https://doi.org/10.1109/PESC.1981.7083621","url":null,"abstract":"A survey of the instabilities of switching voltage regulators with different types of current-mode controllers (including LC3 or constant-hysteresis; MC2 or constant-frequency and constant off-time versions) is presented. Apart from the well-known open-loop oscillation of the constant frequency regulator above 50% duty ratio, other instabilities can also arise by increasing the ac loop-gain. At the constant-hysteresis controller the operating frequency changes, at the other types continuously or hysteretically arising subharmonic oscillation appears. These phenomena can be analysed by taking into account the effect of the amplified and fed-back ripple voltage to the operation of the current comparator. Calculations were accomplished in order to establish maximum usable ac gains for the three basic power converter topologies (buck, boost and buck-boost) and for the above mentioned controllers. Experiments were also carried out for several particular power circuit and controller combinations showing close correspondence to theoretical results.","PeriodicalId":165849,"journal":{"name":"1981 IEEE Power Electronics Specialists Conference","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123450936","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 high voltage, high current light-activated thyristor with a new light sensitive structure","authors":"O. Hashimoto, Yasuyuki Sato","doi":"10.1109/PESC.1981.7083643","DOIUrl":"https://doi.org/10.1109/PESC.1981.7083643","url":null,"abstract":"To improve performance of a light-activated thyristor, its light sensitivity and dv/dt-capability were optimized by developing a novel structure of light sensistive area composed of a grooved light-incident region, n-emitter stripes and a new n-emitter shunt area. This shunt area is a by-pass of the dv/dt-induced displacement current. The relation between light-sensitivity and dv/dt-capability was studied on the basis of a quasi one-dimensional model. Applying this model for designing the structure of the light sensitive area, we developed a 4kV, 1200A light-activated thyristor composed of a tablet of 64mm diameter. This thyristor has a short turn-on delay time of 3 μsec at an incident light power of 5 mW and a high dv/dt-capability of 2000 V/μsec at a junction temperature of 125°C.","PeriodicalId":165849,"journal":{"name":"1981 IEEE Power Electronics Specialists Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130880300","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 current sourced inverter with saturating output transformer","authors":"Dwight V. Jones","doi":"10.1109/PESC.1981.7083634","DOIUrl":"https://doi.org/10.1109/PESC.1981.7083634","url":null,"abstract":"A current sourced inverter with saturating output transformer offers advantages where a DC converter must regulate an isolated output voltage over a 10 to 1 range of input voltage in a dense package capable of 300 watt output.","PeriodicalId":165849,"journal":{"name":"1981 IEEE Power Electronics Specialists Conference","volume":"201 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134179356","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":"Gating circuit developed for high power thyristors","authors":"N. Seki, Y. Tsuruta, K. Ichikawa","doi":"10.1109/PESC.1981.7083642","DOIUrl":"https://doi.org/10.1109/PESC.1981.7083642","url":null,"abstract":"Gate turn off thyristor (GTO) gating circuits, especially off-gating circuits, are the most important for reliable operation of GTO equipment. This paper describes a new gating circuit for high power GTO of 600A class. The off-gating circuit can provide a negative pulse of 200A with its rate of rise of 30A/us. Its power dissipation decreases to 20 percent of a previous type. The on-gating and negative bias circuits are also described.","PeriodicalId":165849,"journal":{"name":"1981 IEEE Power Electronics Specialists Conference","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126640668","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":"Large signal design of a buck converter for high power DC/AC conversion","authors":"J. Marpinard, J. Jalade, M. Valentin","doi":"10.1109/PESC.1981.7083663","DOIUrl":"https://doi.org/10.1109/PESC.1981.7083663","url":null,"abstract":"The design of DC/AC power systems based on classical buck or buck-boost power cell structures implies large signal variation of the operating point duty cycle especially in the case of sine wave output.","PeriodicalId":165849,"journal":{"name":"1981 IEEE Power Electronics Specialists Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131243384","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}