Pub Date : 1995-03-05DOI: 10.1109/APEC.1995.469019
E. Unkauf, D. Torrey
High performance induction motor drive systems typically rely on field oriented control methods. However, achieving field oriented control requires machine specific knowledge, and tracking of drifting motor parameters in order to maintain control. This paper presents an alternative method of control based on a direct model reference adaptive control algorithm which does not require exact knowledge of motor parameters. The algorithm does not rely on maintaining a field oriented state, and is demonstrated to be robust with respect to parameter variations. The paper presents the control theory with experimental results. It is shown through experiment that the control approach is insensitive to motor saturation and parameter variations encountered in motors of similar rating and different manufacturer.<>
{"title":"Direct model reference control of an induction motor","authors":"E. Unkauf, D. Torrey","doi":"10.1109/APEC.1995.469019","DOIUrl":"https://doi.org/10.1109/APEC.1995.469019","url":null,"abstract":"High performance induction motor drive systems typically rely on field oriented control methods. However, achieving field oriented control requires machine specific knowledge, and tracking of drifting motor parameters in order to maintain control. This paper presents an alternative method of control based on a direct model reference adaptive control algorithm which does not require exact knowledge of motor parameters. The algorithm does not rely on maintaining a field oriented state, and is demonstrated to be robust with respect to parameter variations. The paper presents the control theory with experimental results. It is shown through experiment that the control approach is insensitive to motor saturation and parameter variations encountered in motors of similar rating and different manufacturer.<<ETX>>","PeriodicalId":335367,"journal":{"name":"Proceedings of 1995 IEEE Applied Power Electronics Conference and Exposition - APEC'95","volume":"182 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125829017","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 : 1995-03-05DOI: 10.1109/APEC.1995.468998
R. Berthiaume, H. Malec, J. P. Mantey
Benchmarking has become an established industrial service, and business practice. The benchmarking activity presented in this paper focused on determining the best-in-class and worst-in-class for the areas of performance, packaging, reliability, and cost for power modules from several vendors. Critical success factors mere developed for all areas such as normalized FITS/part, performance efficiency, and part lead-times to determine the preferred suppliers for power modules.<>
{"title":"Benchmarking DC-DC converters for world class performance","authors":"R. Berthiaume, H. Malec, J. P. Mantey","doi":"10.1109/APEC.1995.468998","DOIUrl":"https://doi.org/10.1109/APEC.1995.468998","url":null,"abstract":"Benchmarking has become an established industrial service, and business practice. The benchmarking activity presented in this paper focused on determining the best-in-class and worst-in-class for the areas of performance, packaging, reliability, and cost for power modules from several vendors. Critical success factors mere developed for all areas such as normalized FITS/part, performance efficiency, and part lead-times to determine the preferred suppliers for power modules.<<ETX>>","PeriodicalId":335367,"journal":{"name":"Proceedings of 1995 IEEE Applied Power Electronics Conference and Exposition - APEC'95","volume":"143 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117345324","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 : 1995-03-05DOI: 10.1109/APEC.1995.469089
J. Rajagopalan, J.G. Cho, B. Cho, F. Lee
A simple high performance discrete time domain control method of single-phase power factor correction (PFC) circuits is presented to improve the dynamic performance of the output voltage control loop. By adding only a sample and hold (S/H) in the outer voltage loop, the output voltage can be sensed without the 120 Hz ripple and accordingly, a high bandwidth output voltage loop can be designed without any input current distortions. Analysis and design steps are detailed. Simulation results are presented to verify that the performance has improved over a conventional voltage loop control method.<>
{"title":"High performance control of single-phase power factor correction circuits using a discrete time domain control method","authors":"J. Rajagopalan, J.G. Cho, B. Cho, F. Lee","doi":"10.1109/APEC.1995.469089","DOIUrl":"https://doi.org/10.1109/APEC.1995.469089","url":null,"abstract":"A simple high performance discrete time domain control method of single-phase power factor correction (PFC) circuits is presented to improve the dynamic performance of the output voltage control loop. By adding only a sample and hold (S/H) in the outer voltage loop, the output voltage can be sensed without the 120 Hz ripple and accordingly, a high bandwidth output voltage loop can be designed without any input current distortions. Analysis and design steps are detailed. Simulation results are presented to verify that the performance has improved over a conventional voltage loop control method.<<ETX>>","PeriodicalId":335367,"journal":{"name":"Proceedings of 1995 IEEE Applied Power Electronics Conference and Exposition - APEC'95","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132501522","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 : 1995-03-05DOI: 10.1109/APEC.1995.469027
C. Donohue, F. M. Miles
This paper explores the inherently difficult task of implementing total quality management in a marketing and sales organization and more importantly, getting the marketing organization to take a leadership role in the TQM effort.<>
{"title":"Total quality management in the marketing organization","authors":"C. Donohue, F. M. Miles","doi":"10.1109/APEC.1995.469027","DOIUrl":"https://doi.org/10.1109/APEC.1995.469027","url":null,"abstract":"This paper explores the inherently difficult task of implementing total quality management in a marketing and sales organization and more importantly, getting the marketing organization to take a leadership role in the TQM effort.<<ETX>>","PeriodicalId":335367,"journal":{"name":"Proceedings of 1995 IEEE Applied Power Electronics Conference and Exposition - APEC'95","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132708581","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 : 1995-03-05DOI: 10.1109/APEC.1995.469005
D.A. Williams
This paper analyzes and compares the linear range operation of several high speed optocouplers. These devices are evaluated by measuring current transfer ratio (CTR), gain and phase characteristics over varying input currents and ambient temperatures. The parameters are compared in graphical and tabular form, and conclusions are drawn. The optocouplers considered for the switched mode power supplies consist of LED in combination with photodiodes and phototransistors.<>
{"title":"Optocoupler selection for high frequency power supplies","authors":"D.A. Williams","doi":"10.1109/APEC.1995.469005","DOIUrl":"https://doi.org/10.1109/APEC.1995.469005","url":null,"abstract":"This paper analyzes and compares the linear range operation of several high speed optocouplers. These devices are evaluated by measuring current transfer ratio (CTR), gain and phase characteristics over varying input currents and ambient temperatures. The parameters are compared in graphical and tabular form, and conclusions are drawn. The optocouplers considered for the switched mode power supplies consist of LED in combination with photodiodes and phototransistors.<<ETX>>","PeriodicalId":335367,"journal":{"name":"Proceedings of 1995 IEEE Applied Power Electronics Conference and Exposition - APEC'95","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131745149","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 : 1995-03-05DOI: 10.1109/APEC.1995.469107
A. Sabol, M. Heisig
With the advent of the "Green" initiative combined with existing and pending government legislation, manufacturers in consumer, industrial, and appliance industries are now becoming more aware and concerned about the need to make their end products more environmentally safe and more energy efficient. This paper describes an effort by AT&T to develop a single chip power integrated circuit which allows a conventional single phase brushless DC motor to be driven directly off the 110 volt AC main. With this chip, the advantages of low voltage brushless DC motors can now be realized, advantages like improved efficiency, ease of speed control, and long life, while direct two wire interface to the AC main can be maintained to make the conversion from AC motors to brushless DC motors virtually invisible to the user.<>
{"title":"New single chip high voltage power IC allows low voltage brushless DC motors to interface directly to AC mains","authors":"A. Sabol, M. Heisig","doi":"10.1109/APEC.1995.469107","DOIUrl":"https://doi.org/10.1109/APEC.1995.469107","url":null,"abstract":"With the advent of the \"Green\" initiative combined with existing and pending government legislation, manufacturers in consumer, industrial, and appliance industries are now becoming more aware and concerned about the need to make their end products more environmentally safe and more energy efficient. This paper describes an effort by AT&T to develop a single chip power integrated circuit which allows a conventional single phase brushless DC motor to be driven directly off the 110 volt AC main. With this chip, the advantages of low voltage brushless DC motors can now be realized, advantages like improved efficiency, ease of speed control, and long life, while direct two wire interface to the AC main can be maintained to make the conversion from AC motors to brushless DC motors virtually invisible to the user.<<ETX>>","PeriodicalId":335367,"journal":{"name":"Proceedings of 1995 IEEE Applied Power Electronics Conference and Exposition - APEC'95","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133074826","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 : 1995-03-05DOI: 10.1109/APEC.1995.469077
M.D. Takach, P. Lauritzen
A survey of magnetic core material models is the first step in an effort to identify those suitable for power electronics applications. This paper classifies many of the existing magnetic material models and outlines some of their main features.<>
{"title":"Survey of magnetic core models","authors":"M.D. Takach, P. Lauritzen","doi":"10.1109/APEC.1995.469077","DOIUrl":"https://doi.org/10.1109/APEC.1995.469077","url":null,"abstract":"A survey of magnetic core material models is the first step in an effort to identify those suitable for power electronics applications. This paper classifies many of the existing magnetic material models and outlines some of their main features.<<ETX>>","PeriodicalId":335367,"journal":{"name":"Proceedings of 1995 IEEE Applied Power Electronics Conference and Exposition - APEC'95","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133432593","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 : 1995-03-05DOI: 10.1109/APEC.1995.468969
R.K. Williams, B. Mohandes, Chae-Han Lee
Implementation of a 1-MHz switchmode control IC for DC-to-DC conversion in single-cell lithium ion (3- to 4.2-V) applications using an ultra-fast CBiC/D technology is demonstrated. The combination of low-threshold CMOS and high-speed bipolars (3 GHz NPN, 800 MHz PNP) is used to realize a high-speed comparator, 25-MHz error amplifier, and low propagation output delay output buffer at low operating currents. A low-profile, small footprint synchronous Buck converter with excellent ripple and transients response illustrates the benefits of operation at high clock rates.<>
{"title":"High-frequency DC/DC converter for lithium-ion battery applications utilizes ultra-fast CBiC/D process technology","authors":"R.K. Williams, B. Mohandes, Chae-Han Lee","doi":"10.1109/APEC.1995.468969","DOIUrl":"https://doi.org/10.1109/APEC.1995.468969","url":null,"abstract":"Implementation of a 1-MHz switchmode control IC for DC-to-DC conversion in single-cell lithium ion (3- to 4.2-V) applications using an ultra-fast CBiC/D technology is demonstrated. The combination of low-threshold CMOS and high-speed bipolars (3 GHz NPN, 800 MHz PNP) is used to realize a high-speed comparator, 25-MHz error amplifier, and low propagation output delay output buffer at low operating currents. A low-profile, small footprint synchronous Buck converter with excellent ripple and transients response illustrates the benefits of operation at high clock rates.<<ETX>>","PeriodicalId":335367,"journal":{"name":"Proceedings of 1995 IEEE Applied Power Electronics Conference and Exposition - APEC'95","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132156379","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 : 1995-03-05DOI: 10.1109/APEC.1995.469102
G. Levin
There are a number of post regulator methods for power control in a multiple output power regulator. The most popular in the mid to high power range are magnetic amplifiers. The semiconductor equivalent of the magnetic amplifier is the secondary side post regulator (SSPR). SSPR has many advantages over the magnetic amplifier, especially in mid power, high frequency converters. This paper introduces a new SSPR controller, and demonstrates its performance with a forward converter design example.<>
{"title":"A new secondary side post regulator (SSPR) PWM controller for multiple output power supplies","authors":"G. Levin","doi":"10.1109/APEC.1995.469102","DOIUrl":"https://doi.org/10.1109/APEC.1995.469102","url":null,"abstract":"There are a number of post regulator methods for power control in a multiple output power regulator. The most popular in the mid to high power range are magnetic amplifiers. The semiconductor equivalent of the magnetic amplifier is the secondary side post regulator (SSPR). SSPR has many advantages over the magnetic amplifier, especially in mid power, high frequency converters. This paper introduces a new SSPR controller, and demonstrates its performance with a forward converter design example.<<ETX>>","PeriodicalId":335367,"journal":{"name":"Proceedings of 1995 IEEE Applied Power Electronics Conference and Exposition - APEC'95","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114065651","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 : 1995-03-05DOI: 10.1109/APEC.1995.469075
Ju Zhang, G. Skutt, F. Lee
An automated high-frequency core loss measurement method based on the use of an impedance analyzer was discussed by P.M. Gradzki and F.C. Lee (see HFPC proc., p.108-15, 1991). This measurement setup is convenient to use in high-frequency core characterization, but has certain limitations for some types of core loss measurement. Specifically, additional attention must be paid in order to obtain reliable results for core loss characteristics under DC bias, low frequency core loss measurement, and core loss measurement of low permeability materials. This paper addresses these issues and presents an error analysis of the use of a parallel capacitor for power factor compensation.<>
{"title":"Some practical issues related to core loss measurement using impedance analyzer approach","authors":"Ju Zhang, G. Skutt, F. Lee","doi":"10.1109/APEC.1995.469075","DOIUrl":"https://doi.org/10.1109/APEC.1995.469075","url":null,"abstract":"An automated high-frequency core loss measurement method based on the use of an impedance analyzer was discussed by P.M. Gradzki and F.C. Lee (see HFPC proc., p.108-15, 1991). This measurement setup is convenient to use in high-frequency core characterization, but has certain limitations for some types of core loss measurement. Specifically, additional attention must be paid in order to obtain reliable results for core loss characteristics under DC bias, low frequency core loss measurement, and core loss measurement of low permeability materials. This paper addresses these issues and presents an error analysis of the use of a parallel capacitor for power factor compensation.<<ETX>>","PeriodicalId":335367,"journal":{"name":"Proceedings of 1995 IEEE Applied Power Electronics Conference and Exposition - APEC'95","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115249851","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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