{"title":"CAE applications in switching supplies","authors":"D. Solley","doi":"10.1109/APEC.1986.7073340","DOIUrl":"https://doi.org/10.1109/APEC.1986.7073340","url":null,"abstract":"D.C. multimeter, frequency sweeper and network analyzer. The circuit editor, which allows schematic entry, the above instruments and the analysis to be performed whether it be time domain, frequency domain or dc are all set up using a mouse and menu selections. The work bench offers a large model library, a parametric plotter and two statistical packages to boost engineering productivity. Some of its capabilities will be reviewed in the context of this paper. For the Spice connoisseur, the work bench will soon support Spice Plus, a C based version of Berkley 2G.6, which promises a 1.4X to 2.OX speed enhancement. To the first time user I would suggest he become familiar with Tnum, RELTOL, ABSTOL and VNTOL in the Analysis Options menu. Tnum defines the number of steps during the simulation. The default values for ABSTOL (absolute surrent error tolerance) and VNTOL (absolute voltage error tolerance) are 1.0E-12 and 1.0E-6 respectively and the author is not aware of too many power supply applications that require that kind of convergence accuracy.","PeriodicalId":302790,"journal":{"name":"1986 IEEE Applied Power Electronics Conference and Exposition","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125916877","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":"Core selection for & design aspects of an integrated-magnetic forward converter","authors":"E. Bloom","doi":"10.1109/APEC.1986.7073330","DOIUrl":"https://doi.org/10.1109/APEC.1986.7073330","url":null,"abstract":"Core size determination, window area selection and winding methods of an integrated-magnetic switchmofe converter are discussed, using the popular forward topology as a baseline. Alternate winding arrangements are presented for this converter, including two-bobbin approaches. Criteria is developed for rapid projection of weights and volume savings that can be achieved by the user of an integrated-magnetic system in this coverter circuit.","PeriodicalId":302790,"journal":{"name":"1986 IEEE Applied Power Electronics Conference and Exposition","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122320425","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 method of compensation using pole-zero cancellation applied to the design of a voltage-controlled buck converter","authors":"William J. Kerw, R. Carlsten","doi":"10.1109/APEC.1986.7073307","DOIUrl":"https://doi.org/10.1109/APEC.1986.7073307","url":null,"abstract":"Three design methods for compensation of a voltage-control buck converter are (1) a single dominant pole; (2) two real zeros, two real poles; and (3) two complex zeros and two real poles. The paper will give the design procedure and equations for the three circuits , allowing designers to pick the Q of the system, the bandwidth, and the dc gain. The comparison was made for an amplifier gain of 100. The filter elements and the load were the same in all cases. Dynamic damping was used to give a filter Q of 0.707 to optimize the transient response to dynamic load changes. The frequency response was 350 Hz for the dominant-pole case for an optimized flat response, and 1000 Hz with an approximate flat response for the other two cases. Because all systems had an approximately flat response, the expected differences were seen in the rise time caused by frequency-response differences and, particularly , in the sensitivity of the response to changes in the values of the filter inductance, capacitance, and load resistance. Sensitivities were determined for each element.","PeriodicalId":302790,"journal":{"name":"1986 IEEE Applied Power Electronics Conference and Exposition","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114386975","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":"Applications of digital PWM integrated circuits","authors":"Y. Hirsch, L. Rinehart, Yoav Goldenberg","doi":"10.1109/APEC.1986.7073333","DOIUrl":"https://doi.org/10.1109/APEC.1986.7073333","url":null,"abstract":"Pulse width modulated (PWM) circuits are traditionally associated with analog circuitry. A continuous analog input voltage generates one or more pulse width modulated signals where the pulse width is modulated by the input voltage and its frequency is a function of a ramped oscillator. The object of this paper is to introduce a new PWM concept: The digital PWM building block IC and it's applications. In a digital PWM IC, the pulse width of the outputs is determined by a digital 8-bit word. The frequency of the output is a function of a digital clock signal and the output \"dead time\" is programmable. This device is referred to as a \"Digital to PWM Converter\" (DPC). Typical applications in microprocessor systems are: servo motion control, solenoid drive, power conversion, induction heating, etc.","PeriodicalId":302790,"journal":{"name":"1986 IEEE Applied Power Electronics Conference and Exposition","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134232632","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-efficiency power MOSFET used as the control element in an 800-volt switch","authors":"R. Severns, A. Cogan, T. Fortier","doi":"10.1109/APEC.1986.7073308","DOIUrl":"https://doi.org/10.1109/APEC.1986.7073308","url":null,"abstract":"The advantages of a new generation of lowvoltage, dense geometry (1.6 million cells /in.2) power MOSFETs for switching applications is discussed. These devices provide a factor of two lower on-resistance per unit area with a substantial reduction in capacitance. An emitterswitched high-voltage BJT is used as a design example. The discussion on emitter open switching will bring to light several new aspects of this type of BJT operation.","PeriodicalId":302790,"journal":{"name":"1986 IEEE Applied Power Electronics Conference and Exposition","volume":"325 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134070873","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":"Inherent benefits of a 1 MHz high precision mag amp regulated off-line switching power supply","authors":"Charles W. Finger","doi":"10.1109/APEC.1986.7073346","DOIUrl":"https://doi.org/10.1109/APEC.1986.7073346","url":null,"abstract":"This paper will describe a method for meeting a tight multiple output switching power supply specification. Although there aTe many excellent supplies available, cost usually dictates a performance tradeoff for the outputs that are not main loop regulated. The proposed technique uses a feedforward compensated 1 MHz power stage followed by individual secondary mag amp regulators. A Unitrode UCI825 high frequency pulse width modu lator contro Is all primary side functions (See Fig. I).","PeriodicalId":302790,"journal":{"name":"1986 IEEE Applied Power Electronics Conference and Exposition","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133097259","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":"Working with waveform distortion micro computers to main frames","authors":"D. Griffith, R. J. Resch","doi":"10.1109/APEC.1986.7073310","DOIUrl":"https://doi.org/10.1109/APEC.1986.7073310","url":null,"abstract":"There is growing recognition of the problem of severe line voltage distortion , particularly by the electric utilities as evidenced by several recent articles including one by EPRI (Electric Power Research Institute) . Computers, regardless of size , are sensitive to this distortion. Paradoxically, however, computers themselves are a major cause of the distortion and with their proliferation , the problem is compounding rapidly . This paper looks at the cause and effect and then describes methods of reducing the distortion to acceptable level . Both electrical and physical considerations are made.","PeriodicalId":302790,"journal":{"name":"1986 IEEE Applied Power Electronics Conference and Exposition","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121109989","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":"Computer aided design for power electronics","authors":"J. Bowers, R. Vogelsong","doi":"10.1109/APEC.1986.7073338","DOIUrl":"https://doi.org/10.1109/APEC.1986.7073338","url":null,"abstract":"Computer programs and techniques are now available for simulating even the most complex electronic power systems. Models for non-linear magnetics, HEXFETS and other power related devices are included in the latest CAD packages. This paper presents several examples of practical applications.","PeriodicalId":302790,"journal":{"name":"1986 IEEE Applied Power Electronics Conference and Exposition","volume":"163 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122655488","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":"Reduction in distribution system harmonics and improvement in power factor with current control in power converters","authors":"W. G. Bradley, Asif Hassan","doi":"10.1109/APEC.1986.7073312","DOIUrl":"https://doi.org/10.1109/APEC.1986.7073312","url":null,"abstract":"The problem of harmonic pollution of distribution system and the lowering of system power factor by power converter equipment has been studied by computer simulation of an electric vehicle battery charger, used as an example. The results of an extensive series of simulation runs illusttate that the severity of the problem is dependent on the technique for controlling charging current. The results pint out that it is possible to design chargers which will inject less harmonics and operate at near power factor. By mixing chargers with different current control technique, it is possible to achieeve a required overall operating condition in a cluster of chargers.","PeriodicalId":302790,"journal":{"name":"1986 IEEE Applied Power Electronics Conference and Exposition","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129006354","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":"Design techniques for very wide input range power converters","authors":"W. Peterson","doi":"10.1109/APEC.1986.7073306","DOIUrl":"https://doi.org/10.1109/APEC.1986.7073306","url":null,"abstract":"One of the primary functions of any power supply is to provide a constant or regulated output from an input source that is not constant. The variations in the level of input that must be accommodated will have an impact on the circuit type that is used and the performance that will be achieved. As the range of input voltage that must be accommodated increases, the stress on critical components also increases. Therefore, it is prudent to limit the input dynamic range as much as possible. There are special instances where it is not possible to limit the input dynamic range. In such cases, a power supply with increased size and/or reduced performance must be accepted.","PeriodicalId":302790,"journal":{"name":"1986 IEEE Applied Power Electronics Conference and Exposition","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133893688","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}