Pub Date : 1988-10-30DOI: 10.1109/INTLEC.1988.22351
A.S. Kislovski, D. Barras
A novel large-signal control algorithm for buck-type derived power processing cells has been proposed. It is efficient in protecting the power switch during the turn-on and short-circuit transients and features an inherent feedforward of the input voltage. The implementation of the proposed algorithm can be realized by a very simple analog processor comprising only summing networks and comparators and could be done by means of a single dedicated integrated circuit. Beside being protected during the transients, the cells where this algorithm is implemented are insensitive to input filters; thus, simple and robust filters can be used at the input to ameliorate the waveshape of the absorbed current and the power factor of the installation. The theoretical background is confirmed by computer simulation and both are shown to agree with the measurements performed on a 380 V input 6 kW battery charger.<>
{"title":"Large-signal control algorithm for buck-derived high-power switching cells","authors":"A.S. Kislovski, D. Barras","doi":"10.1109/INTLEC.1988.22351","DOIUrl":"https://doi.org/10.1109/INTLEC.1988.22351","url":null,"abstract":"A novel large-signal control algorithm for buck-type derived power processing cells has been proposed. It is efficient in protecting the power switch during the turn-on and short-circuit transients and features an inherent feedforward of the input voltage. The implementation of the proposed algorithm can be realized by a very simple analog processor comprising only summing networks and comparators and could be done by means of a single dedicated integrated circuit. Beside being protected during the transients, the cells where this algorithm is implemented are insensitive to input filters; thus, simple and robust filters can be used at the input to ameliorate the waveshape of the absorbed current and the power factor of the installation. The theoretical background is confirmed by computer simulation and both are shown to agree with the measurements performed on a 380 V input 6 kW battery charger.<<ETX>>","PeriodicalId":169486,"journal":{"name":"10th International Telecommunications Energy Conference","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122088677","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 : 1988-10-30DOI: 10.1109/INTLEC.1988.22355
D. Chin
A novel and general approach is proposed to analyze different types of resonant converters. In this approach, the step function is used comprehensively to represent switching information, demonstrating that the steady-state analysis of resonant converters can be correctly and precisely performed by existing methods in linear-network analysis. The proposed approach not only explicitly considers the influence of the parasitic resistor, but elucidates the physical implications of using a nonideal resonant tank. With the proposed approach, unified closed-form expressions for the voltage and the current of the resonant components can be easily found. The parallel-resonant converter operating at constant frequency is chosen as an example to show how to apply the theory to practical analysis. Analysis, simulation, and experiment are shown to agree very well.<>
{"title":"Steady-state analysis for resonant converters","authors":"D. Chin","doi":"10.1109/INTLEC.1988.22355","DOIUrl":"https://doi.org/10.1109/INTLEC.1988.22355","url":null,"abstract":"A novel and general approach is proposed to analyze different types of resonant converters. In this approach, the step function is used comprehensively to represent switching information, demonstrating that the steady-state analysis of resonant converters can be correctly and precisely performed by existing methods in linear-network analysis. The proposed approach not only explicitly considers the influence of the parasitic resistor, but elucidates the physical implications of using a nonideal resonant tank. With the proposed approach, unified closed-form expressions for the voltage and the current of the resonant components can be easily found. The parallel-resonant converter operating at constant frequency is chosen as an example to show how to apply the theory to practical analysis. Analysis, simulation, and experiment are shown to agree very well.<<ETX>>","PeriodicalId":169486,"journal":{"name":"10th International Telecommunications Energy Conference","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126436064","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 : 1988-10-30DOI: 10.1109/INTLEC.1988.22364
W. Hall
After a review of the historical background of thermoelectric power, the author examines the use of radioisotope thermoelectric generators for space power and conventional commercial thermoelectric generators using fossil fuels. Future prospects in this area are also addressed.<>
{"title":"Thermoelectric power-the road behind and ahead","authors":"W. Hall","doi":"10.1109/INTLEC.1988.22364","DOIUrl":"https://doi.org/10.1109/INTLEC.1988.22364","url":null,"abstract":"After a review of the historical background of thermoelectric power, the author examines the use of radioisotope thermoelectric generators for space power and conventional commercial thermoelectric generators using fossil fuels. Future prospects in this area are also addressed.<<ETX>>","PeriodicalId":169486,"journal":{"name":"10th International Telecommunications Energy Conference","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130440614","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 : 1988-10-30DOI: 10.1109/INTLEC.1988.22356
A. Graham, M. D. Lewis
The authors describe the design process in the development of an intelligent power room monitor. The monitor combines PC-compatible hardware with application software developed using the C language. To bring a product to market within the time and resource constraints a means had to be found to provide specialized functionality using low-cost, readily-available building blocks. The computing platform chosen was a standard PC-compatible motherboard. Several MS-DOS-compatible hardware options were evaluated on the basis of reliability, compatibility, availability and cost. Development languages considered in the final selection process included Pascal, Modula-2, and C.<>
{"title":"A power room monitor based on a MS-DOS computer","authors":"A. Graham, M. D. Lewis","doi":"10.1109/INTLEC.1988.22356","DOIUrl":"https://doi.org/10.1109/INTLEC.1988.22356","url":null,"abstract":"The authors describe the design process in the development of an intelligent power room monitor. The monitor combines PC-compatible hardware with application software developed using the C language. To bring a product to market within the time and resource constraints a means had to be found to provide specialized functionality using low-cost, readily-available building blocks. The computing platform chosen was a standard PC-compatible motherboard. Several MS-DOS-compatible hardware options were evaluated on the basis of reliability, compatibility, availability and cost. Development languages considered in the final selection process included Pascal, Modula-2, and C.<<ETX>>","PeriodicalId":169486,"journal":{"name":"10th International Telecommunications Energy Conference","volume":"168 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131127067","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 : 1988-10-30DOI: 10.1109/INTLEC.1988.22358
P. Rousso, P. Lew, R. Gauthier, D. Petrescu, J. Cobo, Y. Vermette
The ACCLAIM is a microprocessor-based power-plant controller designed to provide the user with the primary features of statistics gathering and plant control. The hardware and software are designed in a modular fashion to permit maximum flexibility for future expansion and enhancements. The features of ACCLAIM are presented, and function implementation is reviewed from both hardware and software standpoints. It is concluded that the primary user benefits of the ACCLAIM series controller include: (1) accurate drain data accessible through the ACCLAIM's history and statistic files; (2) reduced maintenance and operating manpower; (3) decreased redundant capital equipment requirements for safety margin due to the ACCLAIM's tighter control; and (4) rectifier diagnostics to support remote control and decision making.<>
{"title":"A microprocessor based power plant monitor and control system having total rectifier diagnostic capability","authors":"P. Rousso, P. Lew, R. Gauthier, D. Petrescu, J. Cobo, Y. Vermette","doi":"10.1109/INTLEC.1988.22358","DOIUrl":"https://doi.org/10.1109/INTLEC.1988.22358","url":null,"abstract":"The ACCLAIM is a microprocessor-based power-plant controller designed to provide the user with the primary features of statistics gathering and plant control. The hardware and software are designed in a modular fashion to permit maximum flexibility for future expansion and enhancements. The features of ACCLAIM are presented, and function implementation is reviewed from both hardware and software standpoints. It is concluded that the primary user benefits of the ACCLAIM series controller include: (1) accurate drain data accessible through the ACCLAIM's history and statistic files; (2) reduced maintenance and operating manpower; (3) decreased redundant capital equipment requirements for safety margin due to the ACCLAIM's tighter control; and (4) rectifier diagnostics to support remote control and decision making.<<ETX>>","PeriodicalId":169486,"journal":{"name":"10th International Telecommunications Energy Conference","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130030267","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 : 1988-10-30DOI: 10.1109/INTLEC.1988.22360
P. Lew, P. Rousso, D. Petrescu
With the advent of the ACCLAIM series power plant controller/monitors, it has become necessary to produce more elaborate and more sophisticated tests to assure system integrity than is necessary for other plant controllers. The authors outline a computer-aided test (CAT) station designed as a developmental tool for the system testing of the ACCLAIM. They give the basic simulation requirements for the development of a generalized CAT. They then describe the hardware and software developed for the actual CAT station used in the testing of the ACCLAIM.<>
{"title":"Power plant simulation using a computer aided test station","authors":"P. Lew, P. Rousso, D. Petrescu","doi":"10.1109/INTLEC.1988.22360","DOIUrl":"https://doi.org/10.1109/INTLEC.1988.22360","url":null,"abstract":"With the advent of the ACCLAIM series power plant controller/monitors, it has become necessary to produce more elaborate and more sophisticated tests to assure system integrity than is necessary for other plant controllers. The authors outline a computer-aided test (CAT) station designed as a developmental tool for the system testing of the ACCLAIM. They give the basic simulation requirements for the development of a generalized CAT. They then describe the hardware and software developed for the actual CAT station used in the testing of the ACCLAIM.<<ETX>>","PeriodicalId":169486,"journal":{"name":"10th International Telecommunications Energy Conference","volume":"208 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114310804","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 : 1988-10-30DOI: 10.1109/INTLEC.1988.22368
D. McMenamin
The author presents a concept for a totally plug-in telephone power plant. All control functions would be governed by circuit cards which communicate over a bus. Inclusion or updating of a feature would simply involve plugging in a card. Rectifiers would be mounting for 25 A high-frequency rectifiers. A 50 A rectifier, for example, would be a two-slot shelf for 25 A plugs. Features discussed include physical parameters, processing, security measures, engine connectivity, switching machine connections, battery-related features, and input and output considerations.<>
{"title":"A truly modular power plant","authors":"D. McMenamin","doi":"10.1109/INTLEC.1988.22368","DOIUrl":"https://doi.org/10.1109/INTLEC.1988.22368","url":null,"abstract":"The author presents a concept for a totally plug-in telephone power plant. All control functions would be governed by circuit cards which communicate over a bus. Inclusion or updating of a feature would simply involve plugging in a card. Rectifiers would be mounting for 25 A high-frequency rectifiers. A 50 A rectifier, for example, would be a two-slot shelf for 25 A plugs. Features discussed include physical parameters, processing, security measures, engine connectivity, switching machine connections, battery-related features, and input and output considerations.<<ETX>>","PeriodicalId":169486,"journal":{"name":"10th International Telecommunications Energy Conference","volume":"130 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128302228","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 : 1988-10-30DOI: 10.1109/INTLEC.1988.22389
J. Contino, R. Gjone, E. Rhyne
The authors note that water cooling of power supplies has proven to be a viable alternative to air cooling in computer applications and should be given serious consideration by the designers of telecommunications equipment, especially where the electronics are densely packaged. The design of a water-cooled, 725 A switched-mode power supply is used as a vehicle to demonstrate the basic problems encountered in practical water cooled applications. These problems include compromises between the conflicting requirements to optimize the thermal transfer mechanisms with the need for insulation, safety, and condensation and corrosion control. Materials are being developed to satisfy those requirements.<>
{"title":"Water-cooling applications for telecommunications and computer energy systems","authors":"J. Contino, R. Gjone, E. Rhyne","doi":"10.1109/INTLEC.1988.22389","DOIUrl":"https://doi.org/10.1109/INTLEC.1988.22389","url":null,"abstract":"The authors note that water cooling of power supplies has proven to be a viable alternative to air cooling in computer applications and should be given serious consideration by the designers of telecommunications equipment, especially where the electronics are densely packaged. The design of a water-cooled, 725 A switched-mode power supply is used as a vehicle to demonstrate the basic problems encountered in practical water cooled applications. These problems include compromises between the conflicting requirements to optimize the thermal transfer mechanisms with the need for insulation, safety, and condensation and corrosion control. Materials are being developed to satisfy those requirements.<<ETX>>","PeriodicalId":169486,"journal":{"name":"10th International Telecommunications Energy Conference","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133299786","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 : 1988-10-30DOI: 10.1109/INTLEC.1988.22341
F. Bodi
The author examines the application of distributed power supplies for telephone exchange loads in the range of 200-4800 A. The traditional central supply (locally termed the Integrated Power Suite or IPS) by comparison is seen to be deficient in areas of floor area requirements and flexibility. A cost comparison further shows the deficiency of IPS. The application of very small (combination rectifier/battery units) and medium-sized power modules for large telephone loads is examined for cost and flexibility.<>
{"title":"Distributed power systems (telecommunication power supply)","authors":"F. Bodi","doi":"10.1109/INTLEC.1988.22341","DOIUrl":"https://doi.org/10.1109/INTLEC.1988.22341","url":null,"abstract":"The author examines the application of distributed power supplies for telephone exchange loads in the range of 200-4800 A. The traditional central supply (locally termed the Integrated Power Suite or IPS) by comparison is seen to be deficient in areas of floor area requirements and flexibility. A cost comparison further shows the deficiency of IPS. The application of very small (combination rectifier/battery units) and medium-sized power modules for large telephone loads is examined for cost and flexibility.<<ETX>>","PeriodicalId":169486,"journal":{"name":"10th International Telecommunications Energy Conference","volume":"519 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134316933","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 : 1988-10-30DOI: 10.1109/INTLEC.1988.22350
N. Murakami, K. Tsukamoto, K. Sakakibara
The authors describe the circuit and components of a compact board-mounted power supply module. A single-ended forward converter without a reset circuit reduces transformer size and circuit power dissipation. A simple, wideband optoisolation circuit extends the feedback loop bandwidth and reduces the size of the output smoothing filter. A low-profile surface-mounted transformer allows the power supply module to be mounted on a 15 mm-pitch circuit board. The 10 W power supply module can be reduced to 20 cm/sup 3/, which is half the conventional size.<>
{"title":"A compact board-mounted power supply module for telecommunications systems","authors":"N. Murakami, K. Tsukamoto, K. Sakakibara","doi":"10.1109/INTLEC.1988.22350","DOIUrl":"https://doi.org/10.1109/INTLEC.1988.22350","url":null,"abstract":"The authors describe the circuit and components of a compact board-mounted power supply module. A single-ended forward converter without a reset circuit reduces transformer size and circuit power dissipation. A simple, wideband optoisolation circuit extends the feedback loop bandwidth and reduces the size of the output smoothing filter. A low-profile surface-mounted transformer allows the power supply module to be mounted on a 15 mm-pitch circuit board. The 10 W power supply module can be reduced to 20 cm/sup 3/, which is half the conventional size.<<ETX>>","PeriodicalId":169486,"journal":{"name":"10th International Telecommunications Energy Conference","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125899919","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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