T. Thrum, D. Camm, S. Dets, A. Hewett, I. Rudic, G. Stuart, A. Viel
{"title":"Development of a powerful vortex stabilized waterwall flash lamp for RTP applications","authors":"T. Thrum, D. Camm, S. Dets, A. Hewett, I. Rudic, G. Stuart, A. Viel","doi":"10.1109/IAS.2004.1348538","DOIUrl":"https://doi.org/10.1109/IAS.2004.1348538","url":null,"abstract":"A 300 mm long flash lamp based on a water-vortex stabilized high-pressure high-power arc lamp has been developed to meet future requirements in semiconductor rapid thermal processing. This flash lamp is much more powerful than any other commercially available flash lamp. Typical operating parameters are peak currents of up to 50 kA and pulse widths in the order of 0.5 to 2 ms FWHM.","PeriodicalId":131410,"journal":{"name":"Conference Record of the 2004 IEEE Industry Applications Conference, 2004. 39th IAS Annual Meeting.","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127606443","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}
J. D. Ede, K. Atallah, G. Jewell, J.B. Wang, D. Howe
{"title":"Effect of axial segmentation of permanent magnets on rotor loss of modular brushless machines","authors":"J. D. Ede, K. Atallah, G. Jewell, J.B. Wang, D. Howe","doi":"10.1109/IAS.2004.1348700","DOIUrl":"https://doi.org/10.1109/IAS.2004.1348700","url":null,"abstract":"The paper presents a technique for determining the influence of the finite axial length of the permanent magnets on the rotor loss of modular brushless AC machines. The technique is employed to quantify the effectiveness of axially segmenting the permanent magnets of 4-phase, 8-slot, 10-pole and 5-phase, 10-slot, 12-pole brushless machines, which have been designed to meet the performance requirements of an electromechanical actuator for a 'more-electric' aircraft.","PeriodicalId":131410,"journal":{"name":"Conference Record of the 2004 IEEE Industry Applications Conference, 2004. 39th IAS Annual Meeting.","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132581586","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":"Parallel operation of voltage source inverters with minimal intermodule reactors","authors":"Bin Shi, G. Venkataramanan","doi":"10.1109/IAS.2004.1348402","DOIUrl":"https://doi.org/10.1109/IAS.2004.1348402","url":null,"abstract":"Realization of large horsepower motor drives using parallel-connected voltage source inverters rated at smaller power levels would be highly desirable. A robust technique for such a realization would result in several benefits including modularity, ease of maintenance, n+1 redundancy, reliability, etc. Techniques for parallel operation of voltage source inverters with relatively large load inductance have been well established in the field of UPS systems. This paper presents an approach to such realization using minimal passive components along with an active current balancing strategy for motor drive systems. Analytical models, computer simulations and experimental results are presented.","PeriodicalId":131410,"journal":{"name":"Conference Record of the 2004 IEEE Industry Applications Conference, 2004. 39th IAS Annual Meeting.","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133670857","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":"Control of liquid flow distribution utilizing EHD conduction pumping mechanism","authors":"Y. Feng, J. Seyed-Yagoobi","doi":"10.1109/IAS.2004.1348802","DOIUrl":"https://doi.org/10.1109/IAS.2004.1348802","url":null,"abstract":"A maldistribution of liquid flow in parallel evaporators may cause local hot areas, leading to dry-out of branch lines and resulting in a nonoptimum performance. The electrohydrodynamic (EHD) conduction pumping shows its potential as an active control method of the flow distribution. The EHD conduction pumping is associated with the heterocharge layers of finite thickness in the vicinity of the electrodes, which are based on the process of dissociation of the neutral electrolytic species and recombination of the generated ions. This work presents the successful control of liquid flow distribution between two branch lines utilizing an EHD conduction pump at total mass flux levels of 100 and 200 kg/m/sup 2/s.","PeriodicalId":131410,"journal":{"name":"Conference Record of the 2004 IEEE Industry Applications Conference, 2004. 39th IAS Annual Meeting.","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114608394","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 maximum torque per ampere vector control strategy for synchronous reluctance motors considering saturation and iron losses","authors":"Essam M. Rashad, T. S. Radwan, M. A. Rahman","doi":"10.1109/IAS.2004.1348813","DOIUrl":"https://doi.org/10.1109/IAS.2004.1348813","url":null,"abstract":"In recent years, the synchronous reluctance (SyncRel) motor received much attention for many applications due to its simple and robust construction. When using the principle of vector control, it is possible to achieve optimal operation of SyncRel motors for all loads and speeds. A suitable control strategy can be implemented to achieve maximum torque per ampere, high efficiency and maximum power factor. However, the control of a SyncRel motor is highly affected by both magnetic saturation and high iron losses. A new strategy to achieve maximum torque per ampere (MTPA) is proposed in this paper. The motor behavior under vector control is analyzed considering both saturation and iron losses. A simple relationship between the developed torque and d-axis current has been obtained for MTPA conditions. After experimental check, the obtained relation has been implemented in a vector control algorithm. The proposed control strategy has been successfully implemented with the aid of an experimental setup.","PeriodicalId":131410,"journal":{"name":"Conference Record of the 2004 IEEE Industry Applications Conference, 2004. 39th IAS Annual Meeting.","volume":"418 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117330303","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":"Model of a regenerative fuel cell-supported wind turbine AC power generating system","authors":"W. Carter, B. Diong","doi":"10.1109/IAS.2004.1348867","DOIUrl":"https://doi.org/10.1109/IAS.2004.1348867","url":null,"abstract":"Wind is a renewable energy resource that is growing in importance as a means to address the national and global issues of air pollution, grid reliability, dependence on foreign oil, climate change, etc. However, the wind varies over time and there is less of it (on average) at sites around major load centers, which are two of the technical and economic challenges to the establishment of power generation facilities relying solely on the wind. But hybrid systems, such as wind turbine-fuel cell systems, have the potential to rectify these shortcomings and also make possible the greater decentralization of electric power generation in the United States, thus easing the transmission and distribution system's bottlenecks while increasing its overall reliability and security without sacrificing the quality of power delivered to the customer. Furthermore, wind turbine-fuel cell systems can achieve these results in an environment-friendly manner without producing harmful emissions. This work describes the development of a simulation model and the associated control schemes for a small-scale, prototype wind turbine-fuel cell system that will enable the further study and optimization of the performance, sizing, cost, etc., of such hybrid systems.","PeriodicalId":131410,"journal":{"name":"Conference Record of the 2004 IEEE Industry Applications Conference, 2004. 39th IAS Annual Meeting.","volume":"14 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113957108","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 approach to reducing output ripple in switched-capacitor-based step-down DC-DC converters","authors":"Jifeng Han, A. von Jouane, G. Temes","doi":"10.1109/IAS.2004.1348552","DOIUrl":"https://doi.org/10.1109/IAS.2004.1348552","url":null,"abstract":"Rapidly dropping power supply voltages and tight voltage regulation requirements for integrated circuits challenge power supply designers. A novel interleaved discharging (ID) approach is presented to reduce the output ripple in step-down switched-capacitor (SC) DC-DC converters. Simulation and experimental results of a four-stage SC DC-DC converter show that the TD approach can reduce the output ripple by a factor of three. The proposed ID approach also improves the converter efficiency by 7%. The ID approach is suitable for all step-down SC DC-DC converters and provides flexibility in design optimization.","PeriodicalId":131410,"journal":{"name":"Conference Record of the 2004 IEEE Industry Applications Conference, 2004. 39th IAS Annual Meeting.","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123879097","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":"Sensitive and reliable detection of broken rotor bar fault in induction motors","authors":"Xu Bo-qiang, L. Heming, S. Liling","doi":"10.1109/IAS.2004.1348493","DOIUrl":"https://doi.org/10.1109/IAS.2004.1348493","url":null,"abstract":"This paper develops a sensitive and reliable detection scheme for broken rotor bar fault in induction motors, taking into account the intrinsic asymmetry, air-gap eccentricity and rotor misalignment. Firstly, numerical simulation along with related experiments of broken rotor bar fault are performed successfully. Secondly, by thoroughly analyzing the simulation and experiment results, a series of interesting highlights, which could help improve the sensitivity and reliability of broken rotor bar fault detection in actual field, are revealed explicitly. Finally, a novel scheme to detect broken rotor bar fault, which perfectly blends continuous subdivision Fourier transform, self-adaptive filter, rotor slot harmonics based slip estimation and detection threshold self-tuning technique together, and thus possesses high-sensitivity and high-reliability, is proposed in this paper. Fault detection instances in laboratory demonstrate that the presented scheme is valid and effective.","PeriodicalId":131410,"journal":{"name":"Conference Record of the 2004 IEEE Industry Applications Conference, 2004. 39th IAS Annual Meeting.","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126389781","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}
Rengang Chen, J. D. V. Wyk, Shen Wang, W. Odendaal
{"title":"Application of structural winding capacitance cancellation for integrated EMI filters by embedding conductive layers","authors":"Rengang Chen, J. D. V. Wyk, Shen Wang, W. Odendaal","doi":"10.1109/IAS.2004.1348853","DOIUrl":"https://doi.org/10.1109/IAS.2004.1348853","url":null,"abstract":"Discrete EMI filters have been used for power electronics converters to attenuate switching noise and meet EMI standards for many years. Because of the unavoidable structural parasitic parameters of the discrete filter components, such as equivalent parallel capacitance (EPC) of inductors and equivalent series inductance (ESL) of capacitors, the effective frequency range of the discrete filter is normally limited. Aiming at improving high frequency performance and reducing size and profile, the integrated EMI filter structure has been proposed based on advanced integration and packaging technologies. Some improvements have been made but further progress is limited by EPCs of the filter inductors, which is restricted by dimension, size and physical structure. In this paper, a new structural winding capacitance cancellation method for inductors is proposed. Other than trying to reduce EPCs, a conductive ground layer is embedded in the planar inductor windings and the structural capacitance between the inductor winding and this embedded layer is utilized to cancel the parasitic winding capacitance. In order to obtain the best cancellation effect, the structural winding capacitance model of the planar spiral winding structure is given and the equivalent circuit is derived. The design methodology of the layout and area of the embedded ground layer is presented. Applying this method, an improved integrated EMI filter is designed and constructed. The experimental results show that the embedded conductive layer can effectively cancel the parasitic winding capacitance, hence ideal inductor characteristics can be obtained. With the help of this embedded conductive layer, the improved EMI filter has much smaller volume and profile and much better characteristics over a wide frequency range, compared to the former integrated EMI filter and the discrete EMI filter.","PeriodicalId":131410,"journal":{"name":"Conference Record of the 2004 IEEE Industry Applications Conference, 2004. 39th IAS Annual Meeting.","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126438502","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}
A. Netto, P. R. Barros, C. Jacobina, Antonio M. N. Lima
{"title":"Estimating the parameters of an induction motor in open-loop and closed-loop operation","authors":"A. Netto, P. R. Barros, C. Jacobina, Antonio M. N. Lima","doi":"10.1109/IAS.2004.1348384","DOIUrl":"https://doi.org/10.1109/IAS.2004.1348384","url":null,"abstract":"The purpose of this paper is to present two methods for estimating all the parameters of induction motors operating in open-loop or in closed-loop. The parameters are obtained by solving a recursive least squares minimization problem. The estimation procedure is performed in two parts. First, the stator leakage inductance and the stator resistance are determined by using the homopolar machine model. Then, given the previously estimated homopolar parameters and by using the dynamic dq model, all the other parameters are determined. The first method is derived for open-loop operation. In the second method, the model is derived for the case where the stator currents of the motor are regulated via a linear feedback controller. Selected experimental results are used to demonstrate the feasibility and performance of the proposed methods.","PeriodicalId":131410,"journal":{"name":"Conference Record of the 2004 IEEE Industry Applications Conference, 2004. 39th IAS Annual Meeting.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129968204","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}