Pub Date : 2010-06-21DOI: 10.1109/IPEC.2010.5542367
Xiao Li, Wenping Zhang, Chengrui Du, K. Ma, Xiaotian Wu, Dehong Xu
Since the fuel cell (FC) is expensive now, it is worth to optimize the performance of power conversion system (PCS) for raising utilization of fuel cell. This paper presents an approach to investigate the power conversion topology for fuel cell power generation system. Firstly, through analyzing the demands of fuel cell power conversion system, the PCS structures are synthesized and an optimal PCS structure is derived. Secondly, four implemented power conversion circuits of the optimal PCS structure are obtained and evaluated. In addition, a novel power management unit (PMU) a novel power management unit (PMU) scheme is presented. It can not only complement the function of fuel cell, but also act as DC bus capacitors to suppress the fluctuation of neutral point voltage and prevent fuel cell from the low frequency current ripple under unbalanced load. In this way, the electrolytic capacitors can be eliminated.
{"title":"Investigation to power conversion topology for fuel cell power generation system","authors":"Xiao Li, Wenping Zhang, Chengrui Du, K. Ma, Xiaotian Wu, Dehong Xu","doi":"10.1109/IPEC.2010.5542367","DOIUrl":"https://doi.org/10.1109/IPEC.2010.5542367","url":null,"abstract":"Since the fuel cell (FC) is expensive now, it is worth to optimize the performance of power conversion system (PCS) for raising utilization of fuel cell. This paper presents an approach to investigate the power conversion topology for fuel cell power generation system. Firstly, through analyzing the demands of fuel cell power conversion system, the PCS structures are synthesized and an optimal PCS structure is derived. Secondly, four implemented power conversion circuits of the optimal PCS structure are obtained and evaluated. In addition, a novel power management unit (PMU) a novel power management unit (PMU) scheme is presented. It can not only complement the function of fuel cell, but also act as DC bus capacitors to suppress the fluctuation of neutral point voltage and prevent fuel cell from the low frequency current ripple under unbalanced load. In this way, the electrolytic capacitors can be eliminated.","PeriodicalId":353540,"journal":{"name":"The 2010 International Power Electronics Conference - ECCE ASIA -","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129102743","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 : 2010-06-21DOI: 10.1109/IPEC.2010.5544554
K. Ito, M. Sanada, S. Morimoto
A reduction in the use of rare-earth elements in permanent magnets (PMs) is desirable though motors using such rare earth PMs deliver high performance. In order to obtain high torque and high power without rare-earth PMs, a permanent magnet assisted synchronous reluctance motor (PMASynRM) with a ferrite magnet and a three-dimensional (3-D) air-gap structure has been developed. In this paper, the 3-D air-gap structure is demonstrated to be equivalent to shortening the actual gap length to approximately 70% of its original value. Moreover, the effects on the torque and output power of shortening the gap length of the PMASynRM with ferrite magnet are examined.
{"title":"Basic research on Permanent Magnet Assisted Synchronous Reluctance Motor with three-dimensional gap structure","authors":"K. Ito, M. Sanada, S. Morimoto","doi":"10.1109/IPEC.2010.5544554","DOIUrl":"https://doi.org/10.1109/IPEC.2010.5544554","url":null,"abstract":"A reduction in the use of rare-earth elements in permanent magnets (PMs) is desirable though motors using such rare earth PMs deliver high performance. In order to obtain high torque and high power without rare-earth PMs, a permanent magnet assisted synchronous reluctance motor (PMASynRM) with a ferrite magnet and a three-dimensional (3-D) air-gap structure has been developed. In this paper, the 3-D air-gap structure is demonstrated to be equivalent to shortening the actual gap length to approximately 70% of its original value. Moreover, the effects on the torque and output power of shortening the gap length of the PMASynRM with ferrite magnet are examined.","PeriodicalId":353540,"journal":{"name":"The 2010 International Power Electronics Conference - ECCE ASIA -","volume":"2012 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123910875","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 : 2010-06-21DOI: 10.1109/IPEC.2010.5543841
Weimin Zhang, M. Deng, Y. Pei, Zhaoan Wang
In this paper, a low voltage high current electroplating power supply of high efficiency is described. In order to improve efficiency and thermal performance, structural design and optimization of the power supply is taken into consideration. ZVS phase-shift full bridge with synchronous rectification in output side is realized in the DC-DC part. A novel kind of power MOSFET module for synchronous rectification is proposed. Detailed thermal simulation to verify the thermal performance of this module is realized. Meanwhile, in order to make the system more flexible and intelligent, a digital control system is fully applied. Detailed structural design of prototype is also discussed in this paper.
{"title":"Design and optimization of high current power supply for electrochemistry","authors":"Weimin Zhang, M. Deng, Y. Pei, Zhaoan Wang","doi":"10.1109/IPEC.2010.5543841","DOIUrl":"https://doi.org/10.1109/IPEC.2010.5543841","url":null,"abstract":"In this paper, a low voltage high current electroplating power supply of high efficiency is described. In order to improve efficiency and thermal performance, structural design and optimization of the power supply is taken into consideration. ZVS phase-shift full bridge with synchronous rectification in output side is realized in the DC-DC part. A novel kind of power MOSFET module for synchronous rectification is proposed. Detailed thermal simulation to verify the thermal performance of this module is realized. Meanwhile, in order to make the system more flexible and intelligent, a digital control system is fully applied. Detailed structural design of prototype is also discussed in this paper.","PeriodicalId":353540,"journal":{"name":"The 2010 International Power Electronics Conference - ECCE ASIA -","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124238732","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 : 2010-06-21DOI: 10.1109/IPEC.2010.5543381
G. Waltrich, J. Duarte, Marcel A. M. Hendrix
A bi-directional multi-port converter can accommodate various energy storages and sources. Therefore, a multiport converter will be a good candidate for application as a future universal converter for (hybrid) electrical vehicles or local distribution systems. For the multiport converter proposed in this paper, the main design challenge is the design of its three-phase symmetrical transformer. In this converter, symmetry of the leakage inductances is essential to ensure balanced three-phase currents (transferred power). These currents are interconnected by three single-phase high-frequency link transformers. To realize the equality of the leakage inductances a specific transformer design is necessary. Since conventionally wound three-phase transformer core shapes suitable for high-frequency are expensive and difficult to build, a coaxially wound transformer will be designed in this paper.
{"title":"Multiport converters for fast chargers of electrical vehicles - Focus on high-frequency coaxial transformers","authors":"G. Waltrich, J. Duarte, Marcel A. M. Hendrix","doi":"10.1109/IPEC.2010.5543381","DOIUrl":"https://doi.org/10.1109/IPEC.2010.5543381","url":null,"abstract":"A bi-directional multi-port converter can accommodate various energy storages and sources. Therefore, a multiport converter will be a good candidate for application as a future universal converter for (hybrid) electrical vehicles or local distribution systems. For the multiport converter proposed in this paper, the main design challenge is the design of its three-phase symmetrical transformer. In this converter, symmetry of the leakage inductances is essential to ensure balanced three-phase currents (transferred power). These currents are interconnected by three single-phase high-frequency link transformers. To realize the equality of the leakage inductances a specific transformer design is necessary. Since conventionally wound three-phase transformer core shapes suitable for high-frequency are expensive and difficult to build, a coaxially wound transformer will be designed in this paper.","PeriodicalId":353540,"journal":{"name":"The 2010 International Power Electronics Conference - ECCE ASIA -","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121166907","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 : 2010-06-21DOI: 10.1109/IPEC.2010.5544568
O. Hikone, H. Kubota, K. Matsuse, I. Miki
This paper presents position sensor-less control of low-inductance and high-speed permanent magnet synchronous motor (PMSM) drives. The proposed method estimates flux from a reduced order observer and estimates pole position with estimated flux. For low-inductance PMSM, current detection is difficult, because the current varies rapidly. Therefore, pole position estimation with the measured current is difficult. This paper proposes a sensor-less method with the reference current instead of the measured current.
{"title":"Stabilization of Position Sensor-less Control for Low-Inductance and High-Speed PMSM with Reduced Order Flux Observer","authors":"O. Hikone, H. Kubota, K. Matsuse, I. Miki","doi":"10.1109/IPEC.2010.5544568","DOIUrl":"https://doi.org/10.1109/IPEC.2010.5544568","url":null,"abstract":"This paper presents position sensor-less control of low-inductance and high-speed permanent magnet synchronous motor (PMSM) drives. The proposed method estimates flux from a reduced order observer and estimates pole position with estimated flux. For low-inductance PMSM, current detection is difficult, because the current varies rapidly. Therefore, pole position estimation with the measured current is difficult. This paper proposes a sensor-less method with the reference current instead of the measured current.","PeriodicalId":353540,"journal":{"name":"The 2010 International Power Electronics Conference - ECCE ASIA -","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116245443","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 : 2010-06-21DOI: 10.1109/IPEC.2010.5543295
T. Yamazaki, Y. Onozawa, M. Otsuki, N. Fujishima, Y. Seki
The latest 6th generation (6G) IGBTs chip technology suitable for industrial motor drive applications is described in this paper. The 6G-IGBTs with micro-P structure provide better turn-on di/dt controllability, lower turn-off oscillation and better Von-Eoff trade-off relationship. By using the 6G-IGBTs with micro-P, the turn-on power dissipation can be reduced compared to the conventional IGBTs with floating p-base under the operating condition to set the same FWD reverse recovery dv/dt. The trade-off relationship between the on-state voltage drop and the turn-off power dissipation has been improved without the turn-off oscillation even in a severe condition. The impact of the micro-P structure on these characteristics has been demonstrated by using 600V and 1200V class IGBTs.
{"title":"Advanced IGBT chip technology for industrial motor drive applications","authors":"T. Yamazaki, Y. Onozawa, M. Otsuki, N. Fujishima, Y. Seki","doi":"10.1109/IPEC.2010.5543295","DOIUrl":"https://doi.org/10.1109/IPEC.2010.5543295","url":null,"abstract":"The latest 6th generation (6G) IGBTs chip technology suitable for industrial motor drive applications is described in this paper. The 6G-IGBTs with micro-P structure provide better turn-on di/dt controllability, lower turn-off oscillation and better Von-Eoff trade-off relationship. By using the 6G-IGBTs with micro-P, the turn-on power dissipation can be reduced compared to the conventional IGBTs with floating p-base under the operating condition to set the same FWD reverse recovery dv/dt. The trade-off relationship between the on-state voltage drop and the turn-off power dissipation has been improved without the turn-off oscillation even in a severe condition. The impact of the micro-P structure on these characteristics has been demonstrated by using 600V and 1200V class IGBTs.","PeriodicalId":353540,"journal":{"name":"The 2010 International Power Electronics Conference - ECCE ASIA -","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116356052","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 : 2010-06-21DOI: 10.1109/IPEC.2010.5543855
B. Song, M. Kye, Rae-Young Kim
This paper presents a new cost-effective, high power density dc-dc converter for magnetron power supply applications. The proposed dc-dc converter consists of three main circuitry; front-end quasi-resonant flyback converter, high-frequency transformer, and diode rectifier circuit. Experimental results are provided to verify the superiority of the proposed converter under 200W/4kV magnetron operations. The magnetron power supply, based on the proposed soft-switched converter, has achieved an overall efficiency of 85%.
{"title":"Design of a cost-effective DC-DC converter with high power density for magnetron power supplies","authors":"B. Song, M. Kye, Rae-Young Kim","doi":"10.1109/IPEC.2010.5543855","DOIUrl":"https://doi.org/10.1109/IPEC.2010.5543855","url":null,"abstract":"This paper presents a new cost-effective, high power density dc-dc converter for magnetron power supply applications. The proposed dc-dc converter consists of three main circuitry; front-end quasi-resonant flyback converter, high-frequency transformer, and diode rectifier circuit. Experimental results are provided to verify the superiority of the proposed converter under 200W/4kV magnetron operations. The magnetron power supply, based on the proposed soft-switched converter, has achieved an overall efficiency of 85%.","PeriodicalId":353540,"journal":{"name":"The 2010 International Power Electronics Conference - ECCE ASIA -","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114743256","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 : 2010-06-21DOI: 10.1109/IPEC.2010.5542167
R. T. Li, H. Chung
This paper presents an output current control method for grid-connected voltage-source inverter (VSI) with LCL output filter. LCL filter has been shown to provide a high attenuation to high-frequency harmonics with small physical size than other types of filters, like L and LC filters. However, filter oscillation is the major concern in this type of filter. Different passive and active damping methods have been proposed to tackle this issue, but they have their respective limitations, like slow dynamic response, power dissipation, etc. The control method proposed in this paper utilizes the natural oscillation, but without sustained oscillations, to achieve fast dynamic response.
{"title":"Output current control for grid-connected VSI with LCL filter","authors":"R. T. Li, H. Chung","doi":"10.1109/IPEC.2010.5542167","DOIUrl":"https://doi.org/10.1109/IPEC.2010.5542167","url":null,"abstract":"This paper presents an output current control method for grid-connected voltage-source inverter (VSI) with LCL output filter. LCL filter has been shown to provide a high attenuation to high-frequency harmonics with small physical size than other types of filters, like L and LC filters. However, filter oscillation is the major concern in this type of filter. Different passive and active damping methods have been proposed to tackle this issue, but they have their respective limitations, like slow dynamic response, power dissipation, etc. The control method proposed in this paper utilizes the natural oscillation, but without sustained oscillations, to achieve fast dynamic response.","PeriodicalId":353540,"journal":{"name":"The 2010 International Power Electronics Conference - ECCE ASIA -","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114776710","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 : 2010-06-21DOI: 10.1109/IPEC.2010.5543219
M. Tamate, A. Toba, Y. Matsumoto, K. Wada, Toshihisa Shimizu
A method is proposed for the analysis of conducted electromagnetic interference (EMI) in multiple power converters connected to the same power line. This method is focused on the phase differences of the sub-harmonic modulation carrier signal for each power converter. It is confirmed that the phase difference among the power converters determines the EMI noise value in a multi-converter system by analyzing waveform of the common-mode current. In addition, EMI noise suppressions based on a novel phase-difference control technique are also proposed. In order to reduce volume of EMI filter effectively, phase difference θ should be set to 360/nN°, here n is high-order harmonic component near 150 kHz, and N is the number of power converters. On the other hand, in order to prevent radio disturbance, another phase-difference τ should be set to 180fc/fx° not depending on the number of converters (N), here fC is carrier frequency of the converters, and fX is center frequency of frequency band of AM radio. Therefore, Conducted EMI noise can be reduced effectively based on the proposed phase-control for any purpose.
{"title":"Analytical method and suppression technique of conducted EMI noise in a multi-converter system","authors":"M. Tamate, A. Toba, Y. Matsumoto, K. Wada, Toshihisa Shimizu","doi":"10.1109/IPEC.2010.5543219","DOIUrl":"https://doi.org/10.1109/IPEC.2010.5543219","url":null,"abstract":"A method is proposed for the analysis of conducted electromagnetic interference (EMI) in multiple power converters connected to the same power line. This method is focused on the phase differences of the sub-harmonic modulation carrier signal for each power converter. It is confirmed that the phase difference among the power converters determines the EMI noise value in a multi-converter system by analyzing waveform of the common-mode current. In addition, EMI noise suppressions based on a novel phase-difference control technique are also proposed. In order to reduce volume of EMI filter effectively, phase difference θ should be set to 360/nN°, here n is high-order harmonic component near 150 kHz, and N is the number of power converters. On the other hand, in order to prevent radio disturbance, another phase-difference τ should be set to 180fc/fx° not depending on the number of converters (N), here fC is carrier frequency of the converters, and fX is center frequency of frequency band of AM radio. Therefore, Conducted EMI noise can be reduced effectively based on the proposed phase-control for any purpose.","PeriodicalId":353540,"journal":{"name":"The 2010 International Power Electronics Conference - ECCE ASIA -","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124540645","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 : 2010-06-21DOI: 10.1109/IPEC.2010.5543703
D. Sheridan, A. Ritenour, R. Kelley, V. Bondarenko, J. Casady
The unique wide bandgap properties of SiC allow the creation of high performance normally-off vertical JFET power device. Due to the vertical nature of the device, it can easily be designed with blocking capability exceeding 2kV with RDS(ON), sp > 3mΩ-cm2, resulting in the lowest specific on-resistance for enhancement mode SiC devices with VBR < 1200V. The low RDS(ON), sp yields a small die size that translates into switching losses that are 5–10X smaller than similarly rated Si IGBTs. When used as an IGBT replacement, a significant reduction in losses can be achieved, greatly increasing the overall system efficiency of solar inverters and other renewable power systems.
{"title":"Advances in SiC VJFETs for renewable and high-efficiency power electronics applications","authors":"D. Sheridan, A. Ritenour, R. Kelley, V. Bondarenko, J. Casady","doi":"10.1109/IPEC.2010.5543703","DOIUrl":"https://doi.org/10.1109/IPEC.2010.5543703","url":null,"abstract":"The unique wide bandgap properties of SiC allow the creation of high performance normally-off vertical JFET power device. Due to the vertical nature of the device, it can easily be designed with blocking capability exceeding 2kV with RDS(ON), sp > 3mΩ-cm2, resulting in the lowest specific on-resistance for enhancement mode SiC devices with VBR < 1200V. The low RDS(ON), sp yields a small die size that translates into switching losses that are 5–10X smaller than similarly rated Si IGBTs. When used as an IGBT replacement, a significant reduction in losses can be achieved, greatly increasing the overall system efficiency of solar inverters and other renewable power systems.","PeriodicalId":353540,"journal":{"name":"The 2010 International Power Electronics Conference - ECCE ASIA -","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124059485","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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