Pub Date : 1986-06-01DOI: 10.1109/PESC.1986.7415569
Leif E. Lawhite, M. Schlecht
As the switching frequency of a dc-dc converter is raised from 100 kHz to 1 MHz, one would expect the energy storage elements of the circuit to be correspondingly reduced in size. If the circuit must meet input and output ripple requirements of the nature of MIL-STD-461B CEO3, however, the advantage of a higher switching frequency is significantly offset by the higher filter attenuation levels required. This paper discusses the use of active filters, in conjunction with minimal passive filters, to achieve the required ripple levels with a much smaller overall volume. Working active filters with gains in excess of 100 at 1 MHz are also presented.
{"title":"Active filters for 1 MHz power circuits with strict input/output ripple requirements","authors":"Leif E. Lawhite, M. Schlecht","doi":"10.1109/PESC.1986.7415569","DOIUrl":"https://doi.org/10.1109/PESC.1986.7415569","url":null,"abstract":"As the switching frequency of a dc-dc converter is raised from 100 kHz to 1 MHz, one would expect the energy storage elements of the circuit to be correspondingly reduced in size. If the circuit must meet input and output ripple requirements of the nature of MIL-STD-461B CEO3, however, the advantage of a higher switching frequency is significantly offset by the higher filter attenuation levels required. This paper discusses the use of active filters, in conjunction with minimal passive filters, to achieve the required ripple levels with a much smaller overall volume. Working active filters with gains in excess of 100 at 1 MHz are also presented.","PeriodicalId":164857,"journal":{"name":"1986 17th Annual IEEE Power Electronics Specialists Conference","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131876944","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 : 1986-06-01DOI: 10.1109/PESC.1986.7415620
T. H. Sloane, T. Wilson, H. Owen
Algorithms and techniques are presented to tailor the values of circuit elements in fixed-topology circuit models to match data measured from physical inductors and capacitors. Measurements from several types of capacitors and inductors are used to illustrate the results as applied to models of differing complexity.
{"title":"Tailoring inductor and capacitor circuit models to frequency-domain measurements","authors":"T. H. Sloane, T. Wilson, H. Owen","doi":"10.1109/PESC.1986.7415620","DOIUrl":"https://doi.org/10.1109/PESC.1986.7415620","url":null,"abstract":"Algorithms and techniques are presented to tailor the values of circuit elements in fixed-topology circuit models to match data measured from physical inductors and capacitors. Measurements from several types of capacitors and inductors are used to illustrate the results as applied to models of differing complexity.","PeriodicalId":164857,"journal":{"name":"1986 17th Annual IEEE Power Electronics Specialists Conference","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133113714","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 : 1986-06-01DOI: 10.1109/PESC.1986.7415577
L. Malesani, L. Rossetto, P. Tenti
This paper describes a three-phase active filter aimed at the compensation of reactive power and current harmonics of a symmetrical load. The filter employs an inductor for energy storage and a two-quadrant PWM bridge converter.
{"title":"Active filter for reactive power and harmonics compensation","authors":"L. Malesani, L. Rossetto, P. Tenti","doi":"10.1109/PESC.1986.7415577","DOIUrl":"https://doi.org/10.1109/PESC.1986.7415577","url":null,"abstract":"This paper describes a three-phase active filter aimed at the compensation of reactive power and current harmonics of a symmetrical load. The filter employs an inductor for energy storage and a two-quadrant PWM bridge converter.","PeriodicalId":164857,"journal":{"name":"1986 17th Annual IEEE Power Electronics Specialists Conference","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125160884","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 : 1986-06-01DOI: 10.1109/PESC.1986.7415572
W. Koczara, W. Michalski
In the paper energy transmission system which transmits the energy from lower voltage AC network to higher voltage AC network is presented. The system contains the DC link subsystem. It is proven that step up chopper used in DC link subsystem decreases the inverter reactive power from AC network. The AC/DC/AC subsystem is used with synchronous generator system and in rotor circuit of slip-ring induction motor for slip energy recovery. Characteristics of the system with step up chopper are compared with characteristics of classical AC/DC/AC system. In presented system value of energy is controlled by step up chopper with constant phase- controlled angle of inverter. In classical system it is done by change of phase control angle. Theoretical considerations are supported by the experimental results.
{"title":"Reactive power in variable-speed converter-fed drives connected to the three-phase supply network","authors":"W. Koczara, W. Michalski","doi":"10.1109/PESC.1986.7415572","DOIUrl":"https://doi.org/10.1109/PESC.1986.7415572","url":null,"abstract":"In the paper energy transmission system which transmits the energy from lower voltage AC network to higher voltage AC network is presented. The system contains the DC link subsystem. It is proven that step up chopper used in DC link subsystem decreases the inverter reactive power from AC network. The AC/DC/AC subsystem is used with synchronous generator system and in rotor circuit of slip-ring induction motor for slip energy recovery. Characteristics of the system with step up chopper are compared with characteristics of classical AC/DC/AC system. In presented system value of energy is controlled by step up chopper with constant phase- controlled angle of inverter. In classical system it is done by change of phase control angle. Theoretical considerations are supported by the experimental results.","PeriodicalId":164857,"journal":{"name":"1986 17th Annual IEEE Power Electronics Specialists Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131119366","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 : 1986-06-01DOI: 10.1109/PESC.1986.7415603
R. Redl, N. Sokal
Power converters with free-running current-mode control (hysteretic, constant-“off”- time, or constant-“on”-time) can be frequency-stabilized or can be synchronized to a reference frequency. Those can by accomplished by feedforward, feedback, or phase-locking techniques. With hysteretic control, the frequency is controlled by varying the current hysteresis. With constant-“off”-time or constant-“on”-time control, the frequency is controlled by varying the “off” time or the “on” time, respectively. We consider all possible methods of frequency stabilization and synchronization for the three types of free-running current-mode control, used with the three basic types of power converters (buck, boost, and buck-boost). We give analyses and practical design information for the most-important combinations, and experimental data for a buck converter with constant-“off”-time control and feed-forward frequency stabilization.
{"title":"Frequency stabilization and synchronization of free-running current-mode-controlled converters","authors":"R. Redl, N. Sokal","doi":"10.1109/PESC.1986.7415603","DOIUrl":"https://doi.org/10.1109/PESC.1986.7415603","url":null,"abstract":"Power converters with free-running current-mode control (hysteretic, constant-“off”- time, or constant-“on”-time) can be frequency-stabilized or can be synchronized to a reference frequency. Those can by accomplished by feedforward, feedback, or phase-locking techniques. With hysteretic control, the frequency is controlled by varying the current hysteresis. With constant-“off”-time or constant-“on”-time control, the frequency is controlled by varying the “off” time or the “on” time, respectively. We consider all possible methods of frequency stabilization and synchronization for the three types of free-running current-mode control, used with the three basic types of power converters (buck, boost, and buck-boost). We give analyses and practical design information for the most-important combinations, and experimental data for a buck converter with constant-“off”-time control and feed-forward frequency stabilization.","PeriodicalId":164857,"journal":{"name":"1986 17th Annual IEEE Power Electronics Specialists Conference","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128420745","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 : 1900-01-01DOI: 10.1109/PESC.1986.7415623
I. Hansen, G. Sundberg
During the conceptual design phase a 20-kHz power distribution system was selected as the reference for the space station. The system is single-phase 400 VRMS, with a sinusoidal wave form. The initial user power level will be 75 kW with growth to 300 kW. The high-frequency system selection was based upon considerations of efficiency, weight, safety, ease of control, interface with computers, and ease of paralleling for growth. Each of these aspects will be discussed as well as the associated trade-offs involved. An advanced development program has been instituted to accelerate the maturation of the high-frequency system. Some technical aspects of the advanced development program will be discussed.
{"title":"Space station 20-kHz power management and distribution system","authors":"I. Hansen, G. Sundberg","doi":"10.1109/PESC.1986.7415623","DOIUrl":"https://doi.org/10.1109/PESC.1986.7415623","url":null,"abstract":"During the conceptual design phase a 20-kHz power distribution system was selected as the reference for the space station. The system is single-phase 400 VRMS, with a sinusoidal wave form. The initial user power level will be 75 kW with growth to 300 kW. The high-frequency system selection was based upon considerations of efficiency, weight, safety, ease of control, interface with computers, and ease of paralleling for growth. Each of these aspects will be discussed as well as the associated trade-offs involved. An advanced development program has been instituted to accelerate the maturation of the high-frequency system. Some technical aspects of the advanced development program will be discussed.","PeriodicalId":164857,"journal":{"name":"1986 17th Annual IEEE Power Electronics Specialists Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130569050","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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