Pub Date : 1995-03-05DOI: 10.1109/APEC.1995.469001
E. C. Yee, R. Sotăk
Total Quality Management is commonly understood to encompass concepts such as customer satisfaction, continuous improvement, management by fact or data, and employee involvement. While these concepts are easily understood, the implementation of these concepts in a product development organization is not as obvious. This paper will describe how AT&T Power Systems, Board Mounted Power Development Group has implemented Total Quality Management.<>
{"title":"Implementing Total Quality Management for world class product development","authors":"E. C. Yee, R. Sotăk","doi":"10.1109/APEC.1995.469001","DOIUrl":"https://doi.org/10.1109/APEC.1995.469001","url":null,"abstract":"Total Quality Management is commonly understood to encompass concepts such as customer satisfaction, continuous improvement, management by fact or data, and employee involvement. While these concepts are easily understood, the implementation of these concepts in a product development organization is not as obvious. This paper will describe how AT&T Power Systems, Board Mounted Power Development Group has implemented Total Quality Management.<<ETX>>","PeriodicalId":335367,"journal":{"name":"Proceedings of 1995 IEEE Applied Power Electronics Conference and Exposition - APEC'95","volume":"104 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":"132582769","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.1995.469093
S. Kataoka, K. Atagi
The authors describe IR (infrared ray) interference between IR remote-control systems for electric home appliances and high frequency electronic ballast lighting. The separation of the carrier frequency of an IR remote-control system and the lamp operating frequency of high frequency lighting is the most efficient way of preventing this interference. The phenomenon, preventive approaches and experimental results of IR interference experiments are also described.<>
{"title":"Prevention of IR interference from high frequency fluorescent lighting to IR remote-control systems","authors":"S. Kataoka, K. Atagi","doi":"10.1109/APEC.1995.469093","DOIUrl":"https://doi.org/10.1109/APEC.1995.469093","url":null,"abstract":"The authors describe IR (infrared ray) interference between IR remote-control systems for electric home appliances and high frequency electronic ballast lighting. The separation of the carrier frequency of an IR remote-control system and the lamp operating frequency of high frequency lighting is the most efficient way of preventing this interference. The phenomenon, preventive approaches and experimental results of IR interference experiments are also described.<<ETX>>","PeriodicalId":335367,"journal":{"name":"Proceedings of 1995 IEEE Applied Power Electronics Conference and Exposition - APEC'95","volume":"96 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":"131988909","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.1995.468963
Dongyan Zhou, A. Pietkiewicz, Slobodan Cuk
A novel three-switch HV converter derived from the Cuk converter is presented. This converter can operate into a capacitor-diode voltage multiplier, which offers simpler structure and control, higher efficiency, reduced EMI, size and weight savings than traditional switched-mode regulated voltage multipliers. Two significant advantages are the continuous input current and easy isolation extension. The new converter is experimentally verified. Both the steady state and dynamic theoretical models are correlated well with the experimental data.<>
{"title":"A three-switch high-voltage converter","authors":"Dongyan Zhou, A. Pietkiewicz, Slobodan Cuk","doi":"10.1109/APEC.1995.468963","DOIUrl":"https://doi.org/10.1109/APEC.1995.468963","url":null,"abstract":"A novel three-switch HV converter derived from the Cuk converter is presented. This converter can operate into a capacitor-diode voltage multiplier, which offers simpler structure and control, higher efficiency, reduced EMI, size and weight savings than traditional switched-mode regulated voltage multipliers. Two significant advantages are the continuous input current and easy isolation extension. The new converter is experimentally verified. Both the steady state and dynamic theoretical models are correlated well with the experimental data.<<ETX>>","PeriodicalId":335367,"journal":{"name":"Proceedings of 1995 IEEE Applied Power Electronics Conference and Exposition - APEC'95","volume":"124 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":"132295292","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.1995.469079
F. Blaabjerg, Sigurbur Freysson, H. Hansen, Suren Hansen
This paper presents a new space vector modulation strategy suitable for a low cost PWM-VSI inverter employing only four switches, four diodes and a split capacitor bank in the DC-link. The work is motivated by the need of an efficient and flexible modulation method, which is optimized with respect to minimum machine torque ripple. The modulation strategy is named Space Vector Modulation for Four Switch Inverter (SVMFSI) and is realized by planning the switching patterns between four active voltage vectors on the basis of a desired flux trajectory for the stator flux vector in the AC-machine (variable speed induction motor drive). The strategy is implemented in a single 8-bit microcontroller as a double sided modulation strategy. Simulations of the motor torque ripple are performed at a switching frequency of 4 kHz and indicate a torque ripple of 14% at nominal load. Finally, selected results are verified experimentally on a 1.5 kVA prototype B4 inverter. The test results indicate high quality output voltage spectra with no low-order voltage harmonics and a harmonic loss factor (HLF) of 1.12% at unity modulation index.<>
{"title":"A new optimized space vector modulation strategy for a component minimized voltage source inverter","authors":"F. Blaabjerg, Sigurbur Freysson, H. Hansen, Suren Hansen","doi":"10.1109/APEC.1995.469079","DOIUrl":"https://doi.org/10.1109/APEC.1995.469079","url":null,"abstract":"This paper presents a new space vector modulation strategy suitable for a low cost PWM-VSI inverter employing only four switches, four diodes and a split capacitor bank in the DC-link. The work is motivated by the need of an efficient and flexible modulation method, which is optimized with respect to minimum machine torque ripple. The modulation strategy is named Space Vector Modulation for Four Switch Inverter (SVMFSI) and is realized by planning the switching patterns between four active voltage vectors on the basis of a desired flux trajectory for the stator flux vector in the AC-machine (variable speed induction motor drive). The strategy is implemented in a single 8-bit microcontroller as a double sided modulation strategy. Simulations of the motor torque ripple are performed at a switching frequency of 4 kHz and indicate a torque ripple of 14% at nominal load. Finally, selected results are verified experimentally on a 1.5 kVA prototype B4 inverter. The test results indicate high quality output voltage spectra with no low-order voltage harmonics and a harmonic loss factor (HLF) of 1.12% at unity modulation index.<<ETX>>","PeriodicalId":335367,"journal":{"name":"Proceedings of 1995 IEEE Applied Power Electronics Conference and Exposition - APEC'95","volume":"47 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":"134065698","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.1995.469061
V. John, N. Mohan
Standby power supplies (SPS) are widely used as power backup systems for critical electrical loads. A single phase SPS utilizing a high frequency AC link is studied. Use of a high frequency transformer results in a compact and light weight system. Energy loss introduced in the system due to the high frequency AC link is analyzed. Design of the control circuit, to obtain a sinusoidal output voltage with linear and nonlinear loads, is explained. The SPS is used as an active filter to obtain sinusoidal line current under normal conditions of the utility.<>
{"title":"Standby power supply with high frequency isolation","authors":"V. John, N. Mohan","doi":"10.1109/APEC.1995.469061","DOIUrl":"https://doi.org/10.1109/APEC.1995.469061","url":null,"abstract":"Standby power supplies (SPS) are widely used as power backup systems for critical electrical loads. A single phase SPS utilizing a high frequency AC link is studied. Use of a high frequency transformer results in a compact and light weight system. Energy loss introduced in the system due to the high frequency AC link is analyzed. Design of the control circuit, to obtain a sinusoidal output voltage with linear and nonlinear loads, is explained. The SPS is used as an active filter to obtain sinusoidal line current under normal conditions of the utility.<<ETX>>","PeriodicalId":335367,"journal":{"name":"Proceedings of 1995 IEEE Applied Power Electronics Conference and Exposition - APEC'95","volume":"1 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":"123166064","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.1995.469049
H. Takano, J. Takahashi, T. Hatakeyama, M. Nakaoka
The main purpose of this study is to describe the particular characteristic features and inherent benefits of series, parallel and series-parallel resonant tank inverter-fed DC-DC power converters with a high-voltage high-frequency transformer link for medical-use X-ray high-voltage power generators from a practical application viewpoint, along with a specially-designed high-voltage transformer and its dynamic circuit modeling considering iron and copper loss resistances. An effective method to take advantage of the harmful parasitic resonant circuit parameters of the high-voltage high-frequency transformers which are used in three typical resonant tank circuit topologies and their output voltage performances in both the steady and dynamic-states are comparatively discussed. The dynamic and steady-state characteristics of these resonant power converters are evaluated on the basis of computer simulation results under the conditions of wide allowable load ranges used in actual X-ray high-voltage DC power generators.<>
{"title":"Feasible characteristic evaluations of resonant tank PWM inverter-linked DC-DC high-power converters for medical-use high-voltage application","authors":"H. Takano, J. Takahashi, T. Hatakeyama, M. Nakaoka","doi":"10.1109/APEC.1995.469049","DOIUrl":"https://doi.org/10.1109/APEC.1995.469049","url":null,"abstract":"The main purpose of this study is to describe the particular characteristic features and inherent benefits of series, parallel and series-parallel resonant tank inverter-fed DC-DC power converters with a high-voltage high-frequency transformer link for medical-use X-ray high-voltage power generators from a practical application viewpoint, along with a specially-designed high-voltage transformer and its dynamic circuit modeling considering iron and copper loss resistances. An effective method to take advantage of the harmful parasitic resonant circuit parameters of the high-voltage high-frequency transformers which are used in three typical resonant tank circuit topologies and their output voltage performances in both the steady and dynamic-states are comparatively discussed. The dynamic and steady-state characteristics of these resonant power converters are evaluated on the basis of computer simulation results under the conditions of wide allowable load ranges used in actual X-ray high-voltage DC power generators.<<ETX>>","PeriodicalId":335367,"journal":{"name":"Proceedings of 1995 IEEE Applied Power Electronics Conference and Exposition - APEC'95","volume":"39 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":"122793979","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.1995.469045
F. Caricchi, F. Crescimbini, A. Di Napoli
In brushless DC motor drives devoted to electric vehicles (EVs) a bi-directional DC-DC power converter can be used to control suitably both motoring and regenerative braking operations in order to improve the motor drive performance. In consideration of such an application, this paper deals with the experimental study of a buck-boost bi-directional DC-DC power converter topology which has been conceived for the use in EVs propelled by means of wheel-direct-coupling axial-flux PM motor drives. The paper discusses the power converter modes of operation and reports experimental results taken from a 20 kW water-cooled prototype of the proposed power converter topology.<>
{"title":"20 kW water-cooled prototype of a buck-boost bidirectional DC-DC converter topology for electrical vehicle motor drives","authors":"F. Caricchi, F. Crescimbini, A. Di Napoli","doi":"10.1109/APEC.1995.469045","DOIUrl":"https://doi.org/10.1109/APEC.1995.469045","url":null,"abstract":"In brushless DC motor drives devoted to electric vehicles (EVs) a bi-directional DC-DC power converter can be used to control suitably both motoring and regenerative braking operations in order to improve the motor drive performance. In consideration of such an application, this paper deals with the experimental study of a buck-boost bi-directional DC-DC power converter topology which has been conceived for the use in EVs propelled by means of wheel-direct-coupling axial-flux PM motor drives. The paper discusses the power converter modes of operation and reports experimental results taken from a 20 kW water-cooled prototype of the proposed power converter topology.<<ETX>>","PeriodicalId":335367,"journal":{"name":"Proceedings of 1995 IEEE Applied Power Electronics Conference and Exposition - APEC'95","volume":"4 2 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":"123901108","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.1995.468958
A. Rozman, K.J. Fellhoelter
Integrated circuits for next generation computer systems subject the power subsystem to extremely large and fast load step transients, with allowable peak voltage deviations of typically less than two percent. These requirements pose a difficult problem for board level designers and are one of the major drivers for distributed power architectures. In this paper, the problem of maintaining tight regulation throughout the transient is examined, and circuit techniques are presented for its solution.<>
{"title":"Circuit considerations for fast, sensitive, low-voltage loads in a distributed power system","authors":"A. Rozman, K.J. Fellhoelter","doi":"10.1109/APEC.1995.468958","DOIUrl":"https://doi.org/10.1109/APEC.1995.468958","url":null,"abstract":"Integrated circuits for next generation computer systems subject the power subsystem to extremely large and fast load step transients, with allowable peak voltage deviations of typically less than two percent. These requirements pose a difficult problem for board level designers and are one of the major drivers for distributed power architectures. In this paper, the problem of maintaining tight regulation throughout the transient is examined, and circuit techniques are presented for its solution.<<ETX>>","PeriodicalId":335367,"journal":{"name":"Proceedings of 1995 IEEE Applied Power Electronics Conference and Exposition - APEC'95","volume":"9 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":"129809564","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.1995.468979
J. Bell, R. Nelms, M. Shepherd
Electromechanical actuators are being examined as a replacement for the hydraulic systems used in thrust vector control and propellant control valves on space vehicles. The flow of energy from the source to the load in these high power electromechanical systems is controlled via a three-phase inverter. This paper presents an investigation into and design of a zero-voltage switched three-phase inverter for utilization in an electromechanical actuator system. The operation of this inverter is described and design equations are developed. Experimental results from a 5 HP prototype are presented.<>
{"title":"Design of a ZVS PWM inverter for a brushless DC motor in an EMA application","authors":"J. Bell, R. Nelms, M. Shepherd","doi":"10.1109/APEC.1995.468979","DOIUrl":"https://doi.org/10.1109/APEC.1995.468979","url":null,"abstract":"Electromechanical actuators are being examined as a replacement for the hydraulic systems used in thrust vector control and propellant control valves on space vehicles. The flow of energy from the source to the load in these high power electromechanical systems is controlled via a three-phase inverter. This paper presents an investigation into and design of a zero-voltage switched three-phase inverter for utilization in an electromechanical actuator system. The operation of this inverter is described and design equations are developed. Experimental results from a 5 HP prototype are presented.<<ETX>>","PeriodicalId":335367,"journal":{"name":"Proceedings of 1995 IEEE Applied Power Electronics Conference and Exposition - APEC'95","volume":"11 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":"122239099","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.1995.469046
W. Chen, F. Lee, M. Jovanovic, J. Sabate
Four implementations of a full-bridge zero-voltage-switched PWM power converter are discussed. The merits and limitations of each implementation are reviewed and their key features and characteristics are compared. In addition, experimental performance comparisons of the four power converters were performed on 1 kW/400 V laboratory prototypes.<>
{"title":"A comparative study of a class of full bridge zero-voltage-switched PWM converters","authors":"W. Chen, F. Lee, M. Jovanovic, J. Sabate","doi":"10.1109/APEC.1995.469046","DOIUrl":"https://doi.org/10.1109/APEC.1995.469046","url":null,"abstract":"Four implementations of a full-bridge zero-voltage-switched PWM power converter are discussed. The merits and limitations of each implementation are reviewed and their key features and characteristics are compared. In addition, experimental performance comparisons of the four power converters were performed on 1 kW/400 V laboratory prototypes.<<ETX>>","PeriodicalId":335367,"journal":{"name":"Proceedings of 1995 IEEE Applied Power Electronics Conference and Exposition - APEC'95","volume":"24 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":"126926798","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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