{"title":"A sensorless initial rotor position estimation scheme for a direct torque controlled interior permanent magnet synchronous motor drive","authors":"M. E. Haque, L. Zhong, M.F. Rahman","doi":"10.1109/APEC.2001.912472","DOIUrl":"https://doi.org/10.1109/APEC.2001.912472","url":null,"abstract":"This paper presents a method of determining the initial rotor position of an interior permanent magnet synchronous motor (IPMSM) which is required for direct torque controlled (DTC) IPMSM drives. The method consists of injecting a high frequency voltage to the windings and examining the effects of the saliency on the amplitude of the corresponding stator current components. This method does not depend on the level of static load and on any motor parameters. Also the magnetic pole is identified utilizing the effect of magnetic saliency.","PeriodicalId":201844,"journal":{"name":"APEC 2001. Sixteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.01CH37181)","volume":"329 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116123386","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. Aller, T. Habetler, R. Harley, R. Tallam, S.B. Lee
{"title":"Sensorless speed measurement of AC machines using analytic wavelet transform","authors":"J. Aller, T. Habetler, R. Harley, R. Tallam, S.B. Lee","doi":"10.1109/APEC.2001.911624","DOIUrl":"https://doi.org/10.1109/APEC.2001.911624","url":null,"abstract":"A new method for the sensorless speed estimation of AC machines, using the analytic wavelet transform of the stator current signal, is proposed for a direct torque control drive. A comparison with results obtained using the short time Fourier transform is included. The proposed method can be implemented in real time on a DSP. The time-frequency resolution obtained and the computation time required by the proposed algorithm are improved in comparison to existing techniques, and the method can be applied over the entire speed range.","PeriodicalId":201844,"journal":{"name":"APEC 2001. Sixteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.01CH37181)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126110130","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}
R. Prieto, M. Sanz, J. Cobos, P. Alou, Ó. García, J. Uceda
{"title":"Design considerations of multi-layer piezoelectric transformers","authors":"R. Prieto, M. Sanz, J. Cobos, P. Alou, Ó. García, J. Uceda","doi":"10.1109/APEC.2001.912527","DOIUrl":"https://doi.org/10.1109/APEC.2001.912527","url":null,"abstract":"Piezoelectric transformers (PTs) present an attractive solution compared with magnetic transformers because they have alternative characteristics that are appropriate for particular applications, namely high power density and high isolation levels with low EMI content. The behavior of PTs is very dependent on the material type, geometry and number of layers. Since PTs should be used in a power topology, it is necessary to establish design rules in order to select the proper specifications of the PT for each particular application. This work presents some design guidelines as well as the description of the influence of several constructive parameters on the behavior of the multi-layer PTs.","PeriodicalId":201844,"journal":{"name":"APEC 2001. Sixteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.01CH37181)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115116354","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}
M. Rascon, J. Ara, R. Madsen, J. Navas, M. Perez, F. San Miguel
{"title":"Thermal analysis and modelling of planar magnetic components","authors":"M. Rascon, J. Ara, R. Madsen, J. Navas, M. Perez, F. San Miguel","doi":"10.1109/APEC.2001.911633","DOIUrl":"https://doi.org/10.1109/APEC.2001.911633","url":null,"abstract":"Planar magnetic components are widely used in new designs of power supplies due to advantages that they offer. Several works have been done concerning the optimization of the electrical and magnetic design. However, the thermal design of these components has not been studied deeply, and less information is available to predict the temperatures in core and windings of the component during the design stage. This paper addresses such issues for stand alone planar magnetic components and those with windings integrated in the printed circuit board (PCB). Thermal dissipation methods, models and several experiments are described. They allow a better thermal calculation of the planar magnetics components in the early design stage.","PeriodicalId":201844,"journal":{"name":"APEC 2001. Sixteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.01CH37181)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117056346","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":"New pulse multiplication technique based on 6-pulse thyristor converters for high power applications","authors":"Sewan Choi, Jaehyuck Jung","doi":"10.1109/APEC.2001.912461","DOIUrl":"https://doi.org/10.1109/APEC.2001.912461","url":null,"abstract":"A new pulse multiplication technique based on 6-pulse thyristor converters is proposed in this paper. With the proposed technique, 12-pulse, 18-pulse and 24-pulse operations have been obtained both on the input current and on the output voltage. A control strategy over the whole range of phase angle is provided along with sophisticated input current and output voltage analysis. Experimental results from a laboratory prototype verify the proposed theory.","PeriodicalId":201844,"journal":{"name":"APEC 2001. Sixteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.01CH37181)","volume":"107 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121250638","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 novel fully zero-voltage-switching phase-shift bidirectional DC-DC converter","authors":"Gang Chen, Dehong Xu, Yim-Shu Lee","doi":"10.1109/APEC.2001.912485","DOIUrl":"https://doi.org/10.1109/APEC.2001.912485","url":null,"abstract":"A novel zero-voltage-switching (ZVS) phase-shift isolated bidirectional DC-DC converter is proposed. It is composed of two symmetrical active-clamped circuits, one on each side of an isolation transformer. The converter can achieve full ZVS in both forward and backward modes even under no-load condition. The converter also has a fast response. The operation principle and low-frequency model of the converter are explained. Experimental results are presented.","PeriodicalId":201844,"journal":{"name":"APEC 2001. Sixteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.01CH37181)","volume":"144 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127299362","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":"Characterization of advanced materials for high voltage/high temperature power electronics packaging","authors":"D. Hopkins, J. Bowers","doi":"10.1109/APEC.2001.912498","DOIUrl":"https://doi.org/10.1109/APEC.2001.912498","url":null,"abstract":"To achieve high reliability in next generation dense, high voltage (>1 kV DC), high temperature (200/spl deg/C to 400/spl deg/C) power electronic circuits, packaging techniques from higher voltage systems (5 kV-50 kV) need to be introduced. This paper describes advanced materials, measurement and characterization techniques for this class of systems. These systems are being developed for commercial, industrial and military applications that include supplies, drives and actuators. The results are applicable to 1200 V+IGBT based module designs.","PeriodicalId":201844,"journal":{"name":"APEC 2001. Sixteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.01CH37181)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127516312","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":"Design of high-input voltage regulator modules with a novel integrated magnetics","authors":"P. Xu, F. Lee","doi":"10.1109/APEC.2001.911658","DOIUrl":"https://doi.org/10.1109/APEC.2001.911658","url":null,"abstract":"A novel integrated magnetic structure was proposed to improve the performance of high-input voltage regulator modules (VRMs) by significantly reducing the leakage inductance of magnetics. Another benefits of using the proposed structure include reduced core loss, simplified manufacture process and reduction of the primary current ripple. As a result, the size and cost of VRMs could be reduced greatly. The concept was demonstrated on a push-pull forward VRM, which delivers power from a 48-V input to a 1.2-1.5 V/70 A microprocessor load.","PeriodicalId":201844,"journal":{"name":"APEC 2001. Sixteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.01CH37181)","volume":"168 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124687292","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":"Modelling and characterisation of a novel two-finger variable reluctance gripper","authors":"K. Chan, N. Cheung","doi":"10.1109/APEC.2001.912506","DOIUrl":"https://doi.org/10.1109/APEC.2001.912506","url":null,"abstract":"The variable reluctance (VR) actuator has a simple and robust structure. VR actuator does not have a permanent magnet. It is low-cost, easy-to-manufacture, highly reliable and can operate in hostile temperatures. However, it is inherently nonlinear, and is difficult to control and operate as a proportional device. With the advancement of digital signal processing and power electronic drives in recent years, VR actuators have redrawn research interests. The paper describes the investigation and development of a novel two-finger gripper using VR technology. A novel two-finger VR gripper is proposed and fabricated. Measurement and characterization of the actuator is carried out and a mathematical model of the actuator is constructed. Finally, model is simulated and it is verified with experimental results. The actuator exhibits pseudo-linear properties and it is suitable for position and force control applications. The results show that the proposed actuator is an ideal replacement for the higher-cost and less-robust permanent magnet actuators.","PeriodicalId":201844,"journal":{"name":"APEC 2001. Sixteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.01CH37181)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125068131","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":"Stability margin monitoring for DC distributed power systems via current/voltage perturbation","authors":"Jinjun Liu, Xiaogang Feng, F. Lee, D. Borojevich","doi":"10.1109/APEC.2001.912453","DOIUrl":"https://doi.org/10.1109/APEC.2001.912453","url":null,"abstract":"The small-signal stability issues in multi-module power electronics systems, especially DC distributed power systems, are often dealt with by employing the impedance criterion. However, for online system stability monitoring, directly measuring impedance of the source and load subsystems then making comparisons is too complicated and difficult. This paper proposes practical and simple methods, which involve applying current or voltage perturbation to the DC side of distributed power systems then only measuring the amplitude of two currents or voltages in order to monitor the stability margin. For both methods (current perturbation and voltage perturbation), an implementation approach that does not employ external voltage perturbation source is also presented. A comparative evaluation of each method and its corresponding implementation approach is provided.","PeriodicalId":201844,"journal":{"name":"APEC 2001. Sixteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.01CH37181)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125939592","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}