Jian Yin, J. D. van Wyk, W. Odendaal, Zhenxian Liang
{"title":"Comparison of transient thermal parameters for different die connecting approaches","authors":"Jian Yin, J. D. van Wyk, W. Odendaal, Zhenxian Liang","doi":"10.1109/IAS.2003.1257801","DOIUrl":"https://doi.org/10.1109/IAS.2003.1257801","url":null,"abstract":"This paper compares two die connecting approaches based on a simple experimental method, which can achieve accurate characterizations of transient and steady state die thermal parameters. This method, named thermal resistance analysis by an induced transient (TRAIT) method, uses the first n terms of the time-constant spectrum obtained from the cool-down temperature transient measurements to get the complete characterizations of a Cauer equivalent thermal network with n cells. The details of this method including the experimental setup, cool-down temperature recording, curve fitting of the temperature curve, and impedance decomposition are introduced. An improved TRAIT method is introduced. The Cauer equivalent thermal circuit of the embedded power die connecting approach using this method is obtained and compared to the equivalent circuit of wire-bond die connecting approach as a benchmark.","PeriodicalId":288109,"journal":{"name":"38th IAS Annual Meeting on Conference Record of the Industry Applications Conference, 2003.","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131520439","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":"Two separate continually online trained neurocontrollers for a unified power flow controller","authors":"R. Kalyani, G. Venayagamoorthy","doi":"10.1109/IAS.2003.1257518","DOIUrl":"https://doi.org/10.1109/IAS.2003.1257518","url":null,"abstract":"The crucial factor affecting the modern power systems today is load flow control. The Unified Power Flow Controller (UPFC) provides an effective means for controlling the power flow and improving the transient stability in a power network. The UPFC has fast complex dynamics and its conventional control is based on a linearized model of the power system. This paper presents the design of neurocontrollers that control the power flow and regulates voltage along a transmission line. Two separate neurocontrollers are used for controlling the UPFC, one neurocontroller for the shunt inverter and the other for the series inverter. Simulation studies carried out in the PSCAD/EMTDC environment is described and results show the successful control of the UPFC and the power system with the two neurocontrollers. Performances of the neurocontrollers are compared with the conventional PI controllers for system oscillation damping.","PeriodicalId":288109,"journal":{"name":"38th IAS Annual Meeting on Conference Record of the Industry Applications Conference, 2003.","volume":"156 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123193447","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":"Potentials and limits of high speed PM motors","authors":"N. Bianchi, S. Bolognani, F. Luise","doi":"10.1109/IAS.2003.1257830","DOIUrl":"https://doi.org/10.1109/IAS.2003.1257830","url":null,"abstract":"This paper illustrates the potentials and limits of high-speed permanent-magnet (PM) motors. The effect of the material choice, including PM, stator core and retaining sleeve is highlighted. Slotted and slotless configurations are taken into account and compared, computing magnetic, electrical, mechanical and thermal quantities by means of both an analytical and a finite element approach. In particular, the thermal and the PM demagnetization limits and the rotor losses are evaluated. A criteria of optimisation of the motor structure is described, with the diameter ratio and the iron flux density as main design variables.","PeriodicalId":288109,"journal":{"name":"38th IAS Annual Meeting on Conference Record of the Industry Applications Conference, 2003.","volume":"71 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":"132152958","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":"Use of tomography for inference of stress redistribution in rock","authors":"E. Westman","doi":"10.1109/IAS.2003.1257776","DOIUrl":"https://doi.org/10.1109/IAS.2003.1257776","url":null,"abstract":"Tomographic imaging, commonly. known as a CAT-scan or CT-scan, is used in the medical field to generate a picture of the interior of a body. Current research is applying this method to bodies of rock so that rock failure can be better understood and predicted. This paper describes current understanding of failure within rock, states how tomography is used for rock masses, and illustrates its use with two case studies.","PeriodicalId":288109,"journal":{"name":"38th IAS Annual Meeting on Conference Record of the Industry Applications Conference, 2003.","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131424521","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 control strategy of single-phase active filter using a novel d-q transformation","authors":"M. Saitou, N. Matsui, T. Shimizu","doi":"10.1109/IAS.2003.1257706","DOIUrl":"https://doi.org/10.1109/IAS.2003.1257706","url":null,"abstract":"In this paper, a control strategy of the single-phase active filter using a novel d-q transformation is proposed. This d-q transformation is implemented by using Hilbert transform, by which the instantaneous single-phase voltage and current are converted into complex vectors (analytic signals) on the instantaneous basis. Since the fundamental components of voltages and currents are converted into DC components on the d-q coordinate both in the steady and transient states, the harmonics of voltages and currents can be obtained precisely through the low-pass filer installed on the d-q coordinate. This results in the economical active filter with a small capacitor suppressing the DC bus voltage fluctuation because the fundamental power can be fully removed from the active filter input.","PeriodicalId":288109,"journal":{"name":"38th IAS Annual Meeting on Conference Record of the Industry Applications Conference, 2003.","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126204525","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":"Performance evaluation of antilock brake controller for pneumatic brake system","authors":"Ki-Chang Lee, J. Jeon, D. Hwang, YongJun Kim","doi":"10.1109/IAS.2003.1257517","DOIUrl":"https://doi.org/10.1109/IAS.2003.1257517","url":null,"abstract":"Antilock brake system (ABS), equipped in a vehicle, increases safety because it prevents wheels from being locked up and minimizes the danger of skidding, allowing the vehicle to stop in a straight line. ABS also allows drivers to maintain steering control of a vehicle during emergency braking of it. So the vehicle can avoid obstacles or another vehicles on the road. This paper deals with an antilock brake controller for full-air brake system, which is widely used in heavy vehicles such as buses and trucks. Two methods of evaluating the ABS controller and the algorithms were focused on: laboratorial test and field test. For the laboratorial test, a hardware in-the-loop simulator (HILS) was made. This includes actual pneumatic brake hardware between the controller input and vehicle dynamics output, thus simulating a whole bus under braking in real time. This paper describes how the HILS of antilock brake system of a bus was constructed, and how this HILS can be used for evaluating the antilock brake algorithms and electronic control unit (ECU) in the laboratory. Using HILS, we could achieve functional tests needed in an ABS controller in a short time. As a result we could reduce time and cost needed for developing the controller for pneumatic brake. For the field test, a bus equipped with an ABS controller was driven and stopped in the test field, where severe road conditions exist. This paper also describes configurations of the data acquisition system for it. Finally we compared the results of the laboratorial HILS tests with those field tests and proved the HILS is a good method for developing a new system, especially in automotive applications.","PeriodicalId":288109,"journal":{"name":"38th IAS Annual Meeting on Conference Record of the Industry Applications Conference, 2003.","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115463709","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":"Occurrence and suppression of DC-flux deviations in a doubly-fed flywheel generator system","authors":"H. Fujita, H. Akagi, M. Tan, S. Ogasawara","doi":"10.1109/IAS.2003.1257794","DOIUrl":"https://doi.org/10.1109/IAS.2003.1257794","url":null,"abstract":"This paper deals with DC-flux deviations occurring in a doubly-fed flywheel generator with stator-current feedback control. An AC output voltage of the PWM inverter connected to the rotor produces the DC-flux deviations in the stator. It is difficult to detect the DC flux from the stator current and/or voltage, because the DC flux induces no electromotive force on the stator windings. This paper proposes a new control method for suppressing the DC flux deviations based on calculating the magnetizing current from the stator and rotor currents. Experimental results verify the viability of the proposed control method.","PeriodicalId":288109,"journal":{"name":"38th IAS Annual Meeting on Conference Record of the Industry Applications Conference, 2003.","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114656018","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":"Current measurement issues in sensorless control algorithm using high frequency signal injection method","authors":"Jihoon Jang, S. Sul, Yo-Chan Son","doi":"10.1109/IAS.2003.1257694","DOIUrl":"https://doi.org/10.1109/IAS.2003.1257694","url":null,"abstract":"This paper presents the current measurement issues in sensorless control of a permanent magnet (PM) machine based on the fluctuating high frequency voltage signal injection (HFI) method. In such a sensorless control of the PM machine, the accuracy of the rotor position estimation mainly depends on the accuracy of the current measurement of the drive system. The accuracy of current measurement mainly depends on the current scaling errors, offset currents, and the quantization errors of the analog-to-digital (A/D) converter. In this paper, the effects of the current measurement errors on the accuracy of the rotor position estimation in sensorless control of the PM machine based on the HFI method is analyzed using an example of current measurement system and sensorless control scheme. The simulation and experimental results are shown in order to verify the validity of the analysis results.","PeriodicalId":288109,"journal":{"name":"38th IAS Annual Meeting on Conference Record of the Industry Applications Conference, 2003.","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125410331","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. Lopera, M. Prieto, F. Linera, G. Vecino, J. Gonzalez
{"title":"Magnetic contact-less speed measurement sensor for steel industries","authors":"J. Lopera, M. Prieto, F. Linera, G. Vecino, J. Gonzalez","doi":"10.1109/IAS.2003.1257488","DOIUrl":"https://doi.org/10.1109/IAS.2003.1257488","url":null,"abstract":"Speed measurement in steel production is a common task for multiple purposes: fine control, strip coiler control, elongation. Nowadays, the most common method for this is the use of encoders in the rolls, but in some lines there is excessive sliding and new methods are required. Laser sensors offer high accuracy (around 0.1%) in the 1000 m/minute range, but their cost is quite high (over $10000). In this paper we explain a complete speed measurement system, using standard components, for steel lines, with a cost lower than $300, a range up to 800 m/minute and accuracy of about 0.4%.","PeriodicalId":288109,"journal":{"name":"38th IAS Annual Meeting on Conference Record of the Industry Applications Conference, 2003.","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126958028","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":"Outer loop controller design of a switched reluctance motor driven system","authors":"S. Hossain, I. Husain","doi":"10.1109/IAS.2003.1257544","DOIUrl":"https://doi.org/10.1109/IAS.2003.1257544","url":null,"abstract":"The development of an outer loop PID controller, feed-forward controller and the combination of both PID and feed-forward controller for a switched reluctance motor (SRM) drive is presented in this paper. A small signal model of the SRM is derived to linearize the overall control system. The PID and feed-forward controllers are developed from the linear controls theory. The PID controlled SRM drive causes the motor to dither during position hold due to the strong nonlinear properties of the system. A new controller described in this paper combines the use of PID and feed-forward controls. The use of the feed-forward path helps avoid the dithering and reduce the acoustic noise in the SRM.","PeriodicalId":288109,"journal":{"name":"38th IAS Annual Meeting on Conference Record of the Industry Applications Conference, 2003.","volume":"179 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122940578","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}