Pub Date : 2011-11-21DOI: 10.1109/EDPC.2011.6085569
H. Hoffmann, B. Piepenbreier
A converter system based on medium frequency dc/dc-converters can replace the conventional traction transformer saving both mass and energy. A medium-frequency-transformer design-procedure is introduced that allows a clear representation of transformers total mass and efficiency under consideration of thermal aspects. measurements with a prototyped mf-transformer verify the calculated results.
{"title":"Medium frequency transformer for rail application using new materials","authors":"H. Hoffmann, B. Piepenbreier","doi":"10.1109/EDPC.2011.6085569","DOIUrl":"https://doi.org/10.1109/EDPC.2011.6085569","url":null,"abstract":"A converter system based on medium frequency dc/dc-converters can replace the conventional traction transformer saving both mass and energy. A medium-frequency-transformer design-procedure is introduced that allows a clear representation of transformers total mass and efficiency under consideration of thermal aspects. measurements with a prototyped mf-transformer verify the calculated results.","PeriodicalId":333533,"journal":{"name":"2011 1st International Electric Drives Production Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127733618","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 : 2011-11-21DOI: 10.1109/EDPC.2011.6085556
M. Weigl, A. Grimm, M. Schmidt
Laser welding of direct copper-aluminum connections typically leads to the formation of intermetallic phases and an embrittlement of the metal joints. Considering mobile systems such an embrittlement reduces the durability against temperature cycling as well as against dynamic load significantly and limits the overall long-term stability. By means of adapted filler materials it is possible to reduce the brittle phases and thereby enhance the ductility of these dissimilar connections. As the element silicon features quite a well compatibility with copper and aluminum, filler materials based on Al-Si and Cu-Si alloys are used in the current research studies. In contrast to direct Cu-Al welds, the aluminum filler alloy AlSi12 effectuates a more uniform element mixture and a significantly enhanced ductility.
{"title":"Laser-welded connections for high-power electronics in mobile systems","authors":"M. Weigl, A. Grimm, M. Schmidt","doi":"10.1109/EDPC.2011.6085556","DOIUrl":"https://doi.org/10.1109/EDPC.2011.6085556","url":null,"abstract":"Laser welding of direct copper-aluminum connections typically leads to the formation of intermetallic phases and an embrittlement of the metal joints. Considering mobile systems such an embrittlement reduces the durability against temperature cycling as well as against dynamic load significantly and limits the overall long-term stability. By means of adapted filler materials it is possible to reduce the brittle phases and thereby enhance the ductility of these dissimilar connections. As the element silicon features quite a well compatibility with copper and aluminum, filler materials based on Al-Si and Cu-Si alloys are used in the current research studies. In contrast to direct Cu-Al welds, the aluminum filler alloy AlSi12 effectuates a more uniform element mixture and a significantly enhanced ductility.","PeriodicalId":333533,"journal":{"name":"2011 1st International Electric Drives Production Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132810251","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 : 2011-11-21DOI: 10.1109/EDPC.2011.6085562
T. Albrecht, W. Konig, B. Bickel
For Hybrid-, Fuel Cell- and battery cars in the future electric motors in a high volume production are required. In the production of these motors the manufacturing process wiring of the coils was indentified as a possible cost potential. The stator of permanent excited electric machines in signle tooth technique consists of separate winded signle teeth, joined with the cupreous bus bar. Hence a production process was developed, realizing winding of all single teeth without wire disruption using needle winding technology. Alongside the cost-intensive manufactured copper blanks could be replaced by a proceeding of integrated wiring, using an adept laying of the wire along the tracks of a wiring assembly. In the paper the developed proceeding for wiring integrated winding of segmented stators is presented and several specific advantages are discussed.
{"title":"Proceeding for wiring integrated winding of segmented stators of electric machines","authors":"T. Albrecht, W. Konig, B. Bickel","doi":"10.1109/EDPC.2011.6085562","DOIUrl":"https://doi.org/10.1109/EDPC.2011.6085562","url":null,"abstract":"For Hybrid-, Fuel Cell- and battery cars in the future electric motors in a high volume production are required. In the production of these motors the manufacturing process wiring of the coils was indentified as a possible cost potential. The stator of permanent excited electric machines in signle tooth technique consists of separate winded signle teeth, joined with the cupreous bus bar. Hence a production process was developed, realizing winding of all single teeth without wire disruption using needle winding technology. Alongside the cost-intensive manufactured copper blanks could be replaced by a proceeding of integrated wiring, using an adept laying of the wire along the tracks of a wiring assembly. In the paper the developed proceeding for wiring integrated winding of segmented stators is presented and several specific advantages are discussed.","PeriodicalId":333533,"journal":{"name":"2011 1st International Electric Drives Production Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115932028","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 : 2011-11-21DOI: 10.1109/EDPC.2011.6085545
Z. Jajtic, E. Ulmar, C. Volmert, S. Fretzscner, H. Pommer, M. Dorfner
Recent years have seen a growing need for large diameter direct drives, particularly in precision industry applications. Such drives are required to provide a variety of operating conditions and customers demand low-cost taylor-made drive solutions. Investigations into whether segmented direct drive motors may be used to satisfy market demands were performed. It was found that by using standardized motor modules, i.e. linear motor modules, excellent direct drive synchronous segment motors may be implemented.
{"title":"Segmented electric machine - modular motor and system topology for direct drives","authors":"Z. Jajtic, E. Ulmar, C. Volmert, S. Fretzscner, H. Pommer, M. Dorfner","doi":"10.1109/EDPC.2011.6085545","DOIUrl":"https://doi.org/10.1109/EDPC.2011.6085545","url":null,"abstract":"Recent years have seen a growing need for large diameter direct drives, particularly in precision industry applications. Such drives are required to provide a variety of operating conditions and customers demand low-cost taylor-made drive solutions. Investigations into whether segmented direct drive motors may be used to satisfy market demands were performed. It was found that by using standardized motor modules, i.e. linear motor modules, excellent direct drive synchronous segment motors may be implemented.","PeriodicalId":333533,"journal":{"name":"2011 1st International Electric Drives Production Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121245035","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 : 2011-11-21DOI: 10.1109/EDPC.2011.6085548
A. Neubauer, C. Kischka, G. Liebhard, T. Gegg
Due to the development of a high efficient drive train based on a direct drive brushless DC motor (BLDC) powered by a Lithium-Ion battery, STIHL has the possibility to provide professional mobile outdoor power equipment with high output power and sufficient operating time. The requirements of the different products like chain saws, trimmers, blowers, lawn movers or hedge trimmers are very specific due to the different fields of application. Therefore STIHL decided to develop a motor kit specially designed to meet the requirements of all applications but also to be optimized in terms of production cost. This paper describes the development process of the motor kit, which powers the new STIHL rechargeable battery driven products.
{"title":"New compact high-torque drive for mobile outdoor power equipment","authors":"A. Neubauer, C. Kischka, G. Liebhard, T. Gegg","doi":"10.1109/EDPC.2011.6085548","DOIUrl":"https://doi.org/10.1109/EDPC.2011.6085548","url":null,"abstract":"Due to the development of a high efficient drive train based on a direct drive brushless DC motor (BLDC) powered by a Lithium-Ion battery, STIHL has the possibility to provide professional mobile outdoor power equipment with high output power and sufficient operating time. The requirements of the different products like chain saws, trimmers, blowers, lawn movers or hedge trimmers are very specific due to the different fields of application. Therefore STIHL decided to develop a motor kit specially designed to meet the requirements of all applications but also to be optimized in terms of production cost. This paper describes the development process of the motor kit, which powers the new STIHL rechargeable battery driven products.","PeriodicalId":333533,"journal":{"name":"2011 1st International Electric Drives Production Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128772390","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 : 2011-11-21DOI: 10.1109/EDPC.2011.6085574
M. Schoning
The design process of electrical machines is an iterative process consisting of a sizing phase and an optimization phase. The common use of finite element methods during the optimization phase results in a time consuming development, where only short user inputs are required. This harms the design experience especially for the developer, who spends more time waiting for simulation results than for deciding how the machine can be improved. This paper introduces an automated design process which autonomously computes the optimal machine geometry in dependency of an individual objective function. Thereby the involvement of the developer in the optimization phase is reduced, while his knowledge is included by weighting factors in the objective function.
{"title":"Automated electrical machine design with differential evolution techniques","authors":"M. Schoning","doi":"10.1109/EDPC.2011.6085574","DOIUrl":"https://doi.org/10.1109/EDPC.2011.6085574","url":null,"abstract":"The design process of electrical machines is an iterative process consisting of a sizing phase and an optimization phase. The common use of finite element methods during the optimization phase results in a time consuming development, where only short user inputs are required. This harms the design experience especially for the developer, who spends more time waiting for simulation results than for deciding how the machine can be improved. This paper introduces an automated design process which autonomously computes the optimal machine geometry in dependency of an individual objective function. Thereby the involvement of the developer in the optimization phase is reduced, while his knowledge is included by weighting factors in the objective function.","PeriodicalId":333533,"journal":{"name":"2011 1st International Electric Drives Production Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127401256","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 : 2011-11-21DOI: 10.1109/EDPC.2011.6085542
M. Seilmeier, C. Wolz, B. Piepenbreier
In order to be able to optimize the performance of sophisticated model based AC machine control, precise models of the overall drive system are needed. This way compensation schemes for non-ideal characteristics can be derived based on the model inversion technique. Power electronic converters show the following non-ideal effects which have to be considered: turn-on delay time of the gate drive to prevent dc-link short-circuiting, non-ideal switching characteristics and forward voltages of the power electronic devices. In this paper models for these disturbances are derived and the respective compensation schemes are deduced. In constrast to conventional approaches for converter linearization, an analytic compensation law which allows considering different forward voltage-current characteristics of the diode and transistor is proposed. The effectiveness of this method is proven by means of experimental results.
{"title":"Modelling and model based compensation of non-ideal characteristics of two-level voltage source inverters for drive control application","authors":"M. Seilmeier, C. Wolz, B. Piepenbreier","doi":"10.1109/EDPC.2011.6085542","DOIUrl":"https://doi.org/10.1109/EDPC.2011.6085542","url":null,"abstract":"In order to be able to optimize the performance of sophisticated model based AC machine control, precise models of the overall drive system are needed. This way compensation schemes for non-ideal characteristics can be derived based on the model inversion technique. Power electronic converters show the following non-ideal effects which have to be considered: turn-on delay time of the gate drive to prevent dc-link short-circuiting, non-ideal switching characteristics and forward voltages of the power electronic devices. In this paper models for these disturbances are derived and the respective compensation schemes are deduced. In constrast to conventional approaches for converter linearization, an analytic compensation law which allows considering different forward voltage-current characteristics of the diode and transistor is proposed. The effectiveness of this method is proven by means of experimental results.","PeriodicalId":333533,"journal":{"name":"2011 1st International Electric Drives Production Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114512952","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 : 2011-11-21DOI: 10.1109/EDPC.2011.6085573
F. Loos, H. Liess, K. Dvorsky
The main purpose of this paper is to derive formulas and algorithms for the calculation of the heat distribution in electrical and mechanical structures connecting cables and electrical devices. Therewith it shall be possible to dimension these connecting structures before construction very fast and with sufficient accuracy for practical use. New simulation tools based on these formulas and algorithms are created and feature an easy handling and very short calculation times. Consequently, they are appropriate for use in industrial applications, but nevertheless, they respect physical effects like increasing electrical resistance because of higher temperatures. Therefore a power balance-based model has been developed allowing the determination of temperatures at critical points of the electrical connections for the stationary case. To compare the results of this simplified and very fast approach, a numerical model, based on partial differential equations that are solved with the finite element method, has been derived. Via this numerical model, simulation results showing the heat generation in the investigated devices very precisely, are obtained. The disadvantage of the numerical method is that it takes longer to generate the geometries and to solve the nonlinear systems what makes this approach less applicable for industrial use. Further pros and cons of both techniques are demonstrated in this work. To ensure the results of both methods to accord with reality's results, some experimental measurements with characteristic parameter values will be performed and serve as a hedge for the simulation results of both methods.
{"title":"Simulation methods for heat transfer processes in mechanical and electrical connections","authors":"F. Loos, H. Liess, K. Dvorsky","doi":"10.1109/EDPC.2011.6085573","DOIUrl":"https://doi.org/10.1109/EDPC.2011.6085573","url":null,"abstract":"The main purpose of this paper is to derive formulas and algorithms for the calculation of the heat distribution in electrical and mechanical structures connecting cables and electrical devices. Therewith it shall be possible to dimension these connecting structures before construction very fast and with sufficient accuracy for practical use. New simulation tools based on these formulas and algorithms are created and feature an easy handling and very short calculation times. Consequently, they are appropriate for use in industrial applications, but nevertheless, they respect physical effects like increasing electrical resistance because of higher temperatures. Therefore a power balance-based model has been developed allowing the determination of temperatures at critical points of the electrical connections for the stationary case. To compare the results of this simplified and very fast approach, a numerical model, based on partial differential equations that are solved with the finite element method, has been derived. Via this numerical model, simulation results showing the heat generation in the investigated devices very precisely, are obtained. The disadvantage of the numerical method is that it takes longer to generate the geometries and to solve the nonlinear systems what makes this approach less applicable for industrial use. Further pros and cons of both techniques are demonstrated in this work. To ensure the results of both methods to accord with reality's results, some experimental measurements with characteristic parameter values will be performed and serve as a hedge for the simulation results of both methods.","PeriodicalId":333533,"journal":{"name":"2011 1st International Electric Drives Production Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115455259","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 : 2011-11-21DOI: 10.1109/EDPC.2011.6085549
J. Steger
One of the large challenges for the whole power electronic industry is presents by the automotive industry. Unprecedented combinations of thermal, electrical, and reliability performance with a very small volume and weight, will be demanded. A consistent further development of the sinter technology comprises an excellent answer to all this requirements. Sinter technology substitute all solder connections and also the aluminium bond wires. These are the present weak points in a standard power module. All sinter process steps will be described: The sintering of power chips to a ceramic substrate (i.e. DBC), a top side sintering of the power chips to a flexible circuit board, and the sinter process of the whole assembled substrate to a pin-fin heat sink. The thermal and reliability results of a 400 Amp, 600 V Dual IGBT, will be shown.
{"title":"A new generation of power modules with sinter-technology for the automotive industry","authors":"J. Steger","doi":"10.1109/EDPC.2011.6085549","DOIUrl":"https://doi.org/10.1109/EDPC.2011.6085549","url":null,"abstract":"One of the large challenges for the whole power electronic industry is presents by the automotive industry. Unprecedented combinations of thermal, electrical, and reliability performance with a very small volume and weight, will be demanded. A consistent further development of the sinter technology comprises an excellent answer to all this requirements. Sinter technology substitute all solder connections and also the aluminium bond wires. These are the present weak points in a standard power module. All sinter process steps will be described: The sintering of power chips to a ceramic substrate (i.e. DBC), a top side sintering of the power chips to a flexible circuit board, and the sinter process of the whole assembled substrate to a pin-fin heat sink. The thermal and reliability results of a 400 Amp, 600 V Dual IGBT, will be shown.","PeriodicalId":333533,"journal":{"name":"2011 1st International Electric Drives Production Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114872395","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 : 2011-11-21DOI: 10.1109/EDPC.2011.6085563
J. Steinbrink
As is known, type, density and distribution of finite elements have great influence on the results of numerical calculations. This paper deals with the effects of errors which are not so obvious, and some advice is given how to avoid or minimise them.
{"title":"Applicable finite meshes","authors":"J. Steinbrink","doi":"10.1109/EDPC.2011.6085563","DOIUrl":"https://doi.org/10.1109/EDPC.2011.6085563","url":null,"abstract":"As is known, type, density and distribution of finite elements have great influence on the results of numerical calculations. This paper deals with the effects of errors which are not so obvious, and some advice is given how to avoid or minimise them.","PeriodicalId":333533,"journal":{"name":"2011 1st International Electric Drives Production Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124295367","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：