Pub Date : 2009-10-30DOI: 10.1109/ASEMD.2009.5306685
Xiaoming Yang, Bo Zhang, X. Luo, Tianqian Li
A back-gate silicon on insulator (SOI) high voltage device with a compound layer (BG CL SOI-LDMOS) is proposed to enhance breakdown voltage of SOI device. Introducing of compound layer(CL) can effectively suppress gain of surface electric field at source side, and increase electric field in the buried oxide layer. Thus breakdown voltage of device is increased remarkably with invariable specific on-resistance. The breakdown voltage and electric field profile are researched for the new structure by using 2D MEDICI software. Simulation result shows that BG CL SOI-LDMOS can reach 557 V, 165.8 % higher than conventional SOI, at 1μm-thick buried oxide layer, 40 μm-length drift region and 240V back-gate voltage.
{"title":"A new back-gate SOI high voltage device with a compound layer","authors":"Xiaoming Yang, Bo Zhang, X. Luo, Tianqian Li","doi":"10.1109/ASEMD.2009.5306685","DOIUrl":"https://doi.org/10.1109/ASEMD.2009.5306685","url":null,"abstract":"A back-gate silicon on insulator (SOI) high voltage device with a compound layer (BG CL SOI-LDMOS) is proposed to enhance breakdown voltage of SOI device. Introducing of compound layer(CL) can effectively suppress gain of surface electric field at source side, and increase electric field in the buried oxide layer. Thus breakdown voltage of device is increased remarkably with invariable specific on-resistance. The breakdown voltage and electric field profile are researched for the new structure by using 2D MEDICI software. Simulation result shows that BG CL SOI-LDMOS can reach 557 V, 165.8 % higher than conventional SOI, at 1μm-thick buried oxide layer, 40 μm-length drift region and 240V back-gate voltage.","PeriodicalId":354649,"journal":{"name":"2009 International Conference on Applied Superconductivity and Electromagnetic Devices","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125646015","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 : 2009-10-30DOI: 10.1109/ASEMD.2009.5306693
Xuhua Gao, Sibo Wang, Tongzhen Wei
For some kinds of motor drive systems, such as the variable-pitch wind power system, the back-up power needs to output very high power in a short time to meet the emergency. And the work temperature range and cycle life is required more strictly. Supercapacitors are very suitable to be the energy storage component due to its advantages of high power density, high charging speed and extremely high cycling capability. However, the energy density of supercapacitor is relatively low, so the energy management method of supercapacitors based UPS is very important to increase the energy usage efficiency. In this paper the finite state machines theory is applied as management method for supercapacitors based uninterruptable power supply (UPS). Design procedure is discussed in detail. Finally, the simulation and experimental results are provided to verify the design.
{"title":"Energy management method of supercapacitors storage system for UPS applications","authors":"Xuhua Gao, Sibo Wang, Tongzhen Wei","doi":"10.1109/ASEMD.2009.5306693","DOIUrl":"https://doi.org/10.1109/ASEMD.2009.5306693","url":null,"abstract":"For some kinds of motor drive systems, such as the variable-pitch wind power system, the back-up power needs to output very high power in a short time to meet the emergency. And the work temperature range and cycle life is required more strictly. Supercapacitors are very suitable to be the energy storage component due to its advantages of high power density, high charging speed and extremely high cycling capability. However, the energy density of supercapacitor is relatively low, so the energy management method of supercapacitors based UPS is very important to increase the energy usage efficiency. In this paper the finite state machines theory is applied as management method for supercapacitors based uninterruptable power supply (UPS). Design procedure is discussed in detail. Finally, the simulation and experimental results are provided to verify the design.","PeriodicalId":354649,"journal":{"name":"2009 International Conference on Applied Superconductivity and Electromagnetic Devices","volume":"272 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131519195","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 : 2009-10-30DOI: 10.1109/ASEMD.2009.5306687
Xupeng Fang, Zhiqiao Chen
This paper proposes a current-fed Z-source matrix converter topology. It combines the current-fed Z-source ac-ac converter with traditional current-fed matrix converter, and can overcome the conceptual and theoretical barriers and limitations of the traditional matrix converter. It can output lower voltage and has higher reliability. Analysis and simulation results are given, and the simulation results verify the rationality of the proposed matrix converter topology.
{"title":"Current-fed Z-source matrix converter","authors":"Xupeng Fang, Zhiqiao Chen","doi":"10.1109/ASEMD.2009.5306687","DOIUrl":"https://doi.org/10.1109/ASEMD.2009.5306687","url":null,"abstract":"This paper proposes a current-fed Z-source matrix converter topology. It combines the current-fed Z-source ac-ac converter with traditional current-fed matrix converter, and can overcome the conceptual and theoretical barriers and limitations of the traditional matrix converter. It can output lower voltage and has higher reliability. Analysis and simulation results are given, and the simulation results verify the rationality of the proposed matrix converter topology.","PeriodicalId":354649,"journal":{"name":"2009 International Conference on Applied Superconductivity and Electromagnetic Devices","volume":"149 11-12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132846019","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 : 2009-10-30DOI: 10.1109/ASEMD.2009.5306706
L. Zheng, J. Jin
Recent progresses of high temperature superconducting (HTS) bulk technology have made various applications realistic, especially the compact and highly efficient electric motors, magnetic levitation systems and flywheel energy storage systems. In these applications, the HTS bulks are always exposed to the AC external magnetic field. It has previously observed that the trapped magnetic field of a HTS bulk is influenced even attenuated to zero when applied by the AC external magnetic field. Therefore it is important to clarify the trapped field attenuation characteristic in external AC magnetic field. In this work, the trapped field attenuation characteristics of HTS bulk magnet exposed to external AC magnetic field are studied with results presented. The models of HTS bulk with their properties are also summarized. Different magnetization methods are applied to magnetize the HTS bulks, and the magnetization characteristics having differences are illustrated with experimental results.
{"title":"Characteristics of high temprature superconducting bulk magnet","authors":"L. Zheng, J. Jin","doi":"10.1109/ASEMD.2009.5306706","DOIUrl":"https://doi.org/10.1109/ASEMD.2009.5306706","url":null,"abstract":"Recent progresses of high temperature superconducting (HTS) bulk technology have made various applications realistic, especially the compact and highly efficient electric motors, magnetic levitation systems and flywheel energy storage systems. In these applications, the HTS bulks are always exposed to the AC external magnetic field. It has previously observed that the trapped magnetic field of a HTS bulk is influenced even attenuated to zero when applied by the AC external magnetic field. Therefore it is important to clarify the trapped field attenuation characteristic in external AC magnetic field. In this work, the trapped field attenuation characteristics of HTS bulk magnet exposed to external AC magnetic field are studied with results presented. The models of HTS bulk with their properties are also summarized. Different magnetization methods are applied to magnetize the HTS bulks, and the magnetization characteristics having differences are illustrated with experimental results.","PeriodicalId":354649,"journal":{"name":"2009 International Conference on Applied Superconductivity and Electromagnetic Devices","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132929376","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 : 2009-10-30DOI: 10.1109/ASEMD.2009.5306658
Yong Tang, Ming Chen, Bo Wang
The Insulated Gate Bipolar Transistor (IGBT) has been extensively used in all kinds of power electronics devices. But for a long time, the absence of effective methods for its parameters extraction limited the employment of simulator models, which also restricted the development of device application level. Base excess carrier lifetime (Tau) is an important parameter for tail-current and on-state voltage of IGBT, and is also a key one for IGBT physical model. However, the device manufacturer doesn't provide this value in the technical datasheet, and the exited extraction method is so complicated and hard to be carried out by common laboratories and researchers. Based on its turn-off characteristic and semiconductor theory, theoretic analysis and formulary derivation have been carried on in this paper. An improved simplified method for parameter extraction and data processing has also been put forward according to the different turn off characteristics and tail-current of NPT and Trenchstop IGBTs. At last, the experiment circuit has been designed and the experimental result shows the feasibility and accuracy of the new method.
{"title":"An improved method for IGBT base excess carrier lifetime extraction","authors":"Yong Tang, Ming Chen, Bo Wang","doi":"10.1109/ASEMD.2009.5306658","DOIUrl":"https://doi.org/10.1109/ASEMD.2009.5306658","url":null,"abstract":"The Insulated Gate Bipolar Transistor (IGBT) has been extensively used in all kinds of power electronics devices. But for a long time, the absence of effective methods for its parameters extraction limited the employment of simulator models, which also restricted the development of device application level. Base excess carrier lifetime (Tau) is an important parameter for tail-current and on-state voltage of IGBT, and is also a key one for IGBT physical model. However, the device manufacturer doesn't provide this value in the technical datasheet, and the exited extraction method is so complicated and hard to be carried out by common laboratories and researchers. Based on its turn-off characteristic and semiconductor theory, theoretic analysis and formulary derivation have been carried on in this paper. An improved simplified method for parameter extraction and data processing has also been put forward according to the different turn off characteristics and tail-current of NPT and Trenchstop IGBTs. At last, the experiment circuit has been designed and the experimental result shows the feasibility and accuracy of the new method.","PeriodicalId":354649,"journal":{"name":"2009 International Conference on Applied Superconductivity and Electromagnetic Devices","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122175820","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 : 2009-10-30DOI: 10.1109/ASEMD.2009.5306631
Zong Ming, Yangmeng Tian, Fengge Zhang
Arc Fault Detection System (AFDS) is a device intended to protect the power system against the arc fault that may cause fire. When there is an arc fault, the scale of fault current is lower than the initialization of most of the protection devices installed in the lowers, hence AFDS is an effective device to detect the arc fault successfully and interrupt the circuit in time. The characteristics of arc, how it ignites, and what losses it may cause were discussed. The basic structure of AFDS and the primary principles of that AFDS detect arc fault were proposed. For efficiently realizing the global optimization, the single function problem of conventional Arc Fault Circuit Interrupter (AFCI) was solved by setting up a detection system. Composed with detectors, controllers and host computer database, system achieved the automatic detection of arc fault, high temperature fault and leakage current fault to protect the conductors, the equipments and ensure human's safety. Detectors, controllers and host computer database were communicated with CAN bus. Device realized the expectations of reducing the communication cost and improving the communication quality.
{"title":"Design of arc fault detection system based on CAN bus","authors":"Zong Ming, Yangmeng Tian, Fengge Zhang","doi":"10.1109/ASEMD.2009.5306631","DOIUrl":"https://doi.org/10.1109/ASEMD.2009.5306631","url":null,"abstract":"Arc Fault Detection System (AFDS) is a device intended to protect the power system against the arc fault that may cause fire. When there is an arc fault, the scale of fault current is lower than the initialization of most of the protection devices installed in the lowers, hence AFDS is an effective device to detect the arc fault successfully and interrupt the circuit in time. The characteristics of arc, how it ignites, and what losses it may cause were discussed. The basic structure of AFDS and the primary principles of that AFDS detect arc fault were proposed. For efficiently realizing the global optimization, the single function problem of conventional Arc Fault Circuit Interrupter (AFCI) was solved by setting up a detection system. Composed with detectors, controllers and host computer database, system achieved the automatic detection of arc fault, high temperature fault and leakage current fault to protect the conductors, the equipments and ensure human's safety. Detectors, controllers and host computer database were communicated with CAN bus. Device realized the expectations of reducing the communication cost and improving the communication quality.","PeriodicalId":354649,"journal":{"name":"2009 International Conference on Applied Superconductivity and Electromagnetic Devices","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127421561","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 : 2009-10-30DOI: 10.1109/ASEMD.2009.5306654
Yu Lei, Lin Lei
In order to improve optimization performance of Double-Particle Swarm Optimization (DPSO) algorithm, an Improved Double-Particle Swarm Optimization (IDPSO) algorithm is proposed and applied to the sensor's optimization scheduling of wireless sensor network (WSN). Adaptive inertia coefficient, time-varying synchronous study factor and speed variability factor are introduced into IDPSO algorithm so as to increase the diversity of species group and improve the ability of global optimization. Based on IDPSO algorithm, selected the sensor resource allocation model of wireless sensor network as the objective function, The experiment has been proved that IDPSO algorithm can obtain more ideal sensor's resource allocation than DPSO algorithm.
{"title":"Sensor's optimization scheduling based on improved Double-Particle Swarm Optimization (DPSO) algorithm","authors":"Yu Lei, Lin Lei","doi":"10.1109/ASEMD.2009.5306654","DOIUrl":"https://doi.org/10.1109/ASEMD.2009.5306654","url":null,"abstract":"In order to improve optimization performance of Double-Particle Swarm Optimization (DPSO) algorithm, an Improved Double-Particle Swarm Optimization (IDPSO) algorithm is proposed and applied to the sensor's optimization scheduling of wireless sensor network (WSN). Adaptive inertia coefficient, time-varying synchronous study factor and speed variability factor are introduced into IDPSO algorithm so as to increase the diversity of species group and improve the ability of global optimization. Based on IDPSO algorithm, selected the sensor resource allocation model of wireless sensor network as the objective function, The experiment has been proved that IDPSO algorithm can obtain more ideal sensor's resource allocation than DPSO algorithm.","PeriodicalId":354649,"journal":{"name":"2009 International Conference on Applied Superconductivity and Electromagnetic Devices","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114935326","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 : 2009-10-30DOI: 10.1109/ASEMD.2009.5306681
Shuqin Wan, Zhenhai Chen, Zongguang Yu, Songren Huang, H. Ji
An embedded 14-bit 1-GS/s digital-to-analog converter for Direct Digital Frequency Synthesizer (DDFS) application is presented. The DAC is implemented using a segmented current-steering architecture, with the top 6bits and the remaining 8 bits. The output stage of dual return-to-zero scheme is used to enhance the dynamic performance of spurious-free dynamic range (SFDR). The DAC core is fabricated in a 1P6M 0.18 μm standard CMOS technology occupies a die area of only 1.6 × 1.5 mm2. The measured differential nonlinearity lies between −0.8 LSB and 0.3LSB, integral nonlinearity lies between −1.5LSB and 1LSB. And the SFDR is 76.47 dB for 80 MHz output at 0.8GHz sampling clock rate.
{"title":"An embedded 14-bit 800MS/s DAC for direct digital frequency synthesizer in 0.18-μm CMOS","authors":"Shuqin Wan, Zhenhai Chen, Zongguang Yu, Songren Huang, H. Ji","doi":"10.1109/ASEMD.2009.5306681","DOIUrl":"https://doi.org/10.1109/ASEMD.2009.5306681","url":null,"abstract":"An embedded 14-bit 1-GS/s digital-to-analog converter for Direct Digital Frequency Synthesizer (DDFS) application is presented. The DAC is implemented using a segmented current-steering architecture, with the top 6bits and the remaining 8 bits. The output stage of dual return-to-zero scheme is used to enhance the dynamic performance of spurious-free dynamic range (SFDR). The DAC core is fabricated in a 1P6M 0.18 μm standard CMOS technology occupies a die area of only 1.6 × 1.5 mm2. The measured differential nonlinearity lies between −0.8 LSB and 0.3LSB, integral nonlinearity lies between −1.5LSB and 1LSB. And the SFDR is 76.47 dB for 80 MHz output at 0.8GHz sampling clock rate.","PeriodicalId":354649,"journal":{"name":"2009 International Conference on Applied Superconductivity and Electromagnetic Devices","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130454987","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 : 2009-10-30DOI: 10.1109/ASEMD.2009.5306651
Hongkui Li, Yan Li, Xi Sun, Dongxue Li, Youteng Jing
This research studies the forces on the windings of transformer due to magnetic inrush current. These forces are compared with the corresponding forces due to short-circuit of the windings. Three dimensional finite element computation of three-phase power transformer is carried out based on the maximum permissible magnetic inrush current value where its amplitude is the same as the rated short-circuit current. To verify the computation results, they are compared with those obtained using Ansys software simulation.
{"title":"Analysis of three-phase power transformer windings forces caused by magnetic inrush and short-circuit currents","authors":"Hongkui Li, Yan Li, Xi Sun, Dongxue Li, Youteng Jing","doi":"10.1109/ASEMD.2009.5306651","DOIUrl":"https://doi.org/10.1109/ASEMD.2009.5306651","url":null,"abstract":"This research studies the forces on the windings of transformer due to magnetic inrush current. These forces are compared with the corresponding forces due to short-circuit of the windings. Three dimensional finite element computation of three-phase power transformer is carried out based on the maximum permissible magnetic inrush current value where its amplitude is the same as the rated short-circuit current. To verify the computation results, they are compared with those obtained using Ansys software simulation.","PeriodicalId":354649,"journal":{"name":"2009 International Conference on Applied Superconductivity and Electromagnetic Devices","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132233036","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 : 2009-10-30DOI: 10.1109/ASEMD.2009.5306655
Zhiming Li, Lin Lei
Wireless sensor networks (WSNs) is always consist of stationary and mobile sensor nodes, sensor node deployment is one of the key topics addressed in the researches of WSNs, traditional virtual force(VF) algorithm is presented. This paper proposes a method of improved particle swarm optimization to solve the problem. The simulation results show that the improved particle swarm optimization has better performance on the sensor node deployment problem and reduce the network energy consumption and increase the whole coverage ratio.
{"title":"Sensor node deployment in wireless sensor networks based on improved particle swarm optimization","authors":"Zhiming Li, Lin Lei","doi":"10.1109/ASEMD.2009.5306655","DOIUrl":"https://doi.org/10.1109/ASEMD.2009.5306655","url":null,"abstract":"Wireless sensor networks (WSNs) is always consist of stationary and mobile sensor nodes, sensor node deployment is one of the key topics addressed in the researches of WSNs, traditional virtual force(VF) algorithm is presented. This paper proposes a method of improved particle swarm optimization to solve the problem. The simulation results show that the improved particle swarm optimization has better performance on the sensor node deployment problem and reduce the network energy consumption and increase the whole coverage ratio.","PeriodicalId":354649,"journal":{"name":"2009 International Conference on Applied Superconductivity and Electromagnetic Devices","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133347998","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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