Pub Date : 2014-11-01DOI: 10.1109/PEAC.2014.7038041
Y. Huo, A. Zhang, Xuelin Zhang, Chunjie Yan, Guojun Yu, H. Chen, Zhou Yang
The stirling convertor is a high efficient power generator, many kinds of heat source can be used in this technology with good suitability, high efficiency, simple structure and long life. As the important component of the stirling convertor, linear generator can adapt well with the stirling engine. The structure of the generator is cylinder type of moving permanent magnet, which is single-phase and single pole and single slot. This paper is about design a linear generator to match characteristics of the stirling convertor. The magnetic circuit structure and electromagnetic design of generator was studied. Including no-load electromagnetic parameters, Analyzing the influence of the motor structure parameters for the no-load electromagnetic parameters, which provides reference for the size of the generator and its optimization. No load electromagnetic parameters including no load air gap magnetic dense, EMF, no-load leakage coefficient, no load inductance. The external characteristic of generator and efficiency characteristics are analyzed too. Such as the factors of impacting these characteristic by the voltage regulation, armature reaction, permanent magnet working point, iron loss, etc.
{"title":"Research of moving magnet linear generator for stirling convertor","authors":"Y. Huo, A. Zhang, Xuelin Zhang, Chunjie Yan, Guojun Yu, H. Chen, Zhou Yang","doi":"10.1109/PEAC.2014.7038041","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7038041","url":null,"abstract":"The stirling convertor is a high efficient power generator, many kinds of heat source can be used in this technology with good suitability, high efficiency, simple structure and long life. As the important component of the stirling convertor, linear generator can adapt well with the stirling engine. The structure of the generator is cylinder type of moving permanent magnet, which is single-phase and single pole and single slot. This paper is about design a linear generator to match characteristics of the stirling convertor. The magnetic circuit structure and electromagnetic design of generator was studied. Including no-load electromagnetic parameters, Analyzing the influence of the motor structure parameters for the no-load electromagnetic parameters, which provides reference for the size of the generator and its optimization. No load electromagnetic parameters including no load air gap magnetic dense, EMF, no-load leakage coefficient, no load inductance. The external characteristic of generator and efficiency characteristics are analyzed too. Such as the factors of impacting these characteristic by the voltage regulation, armature reaction, permanent magnet working point, iron loss, etc.","PeriodicalId":309780,"journal":{"name":"2014 International Power Electronics and Application Conference and Exposition","volume":"BME-26 7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132792752","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 : 2014-11-01DOI: 10.1109/PEAC.2014.7037884
Guangqian Ding, F. Gao, Quanrui Hao, Song Zhang
This paper proposes an improved power sharing control scheme to achieve the accurate power sharing control and offer an improved PCC voltage regulation capability in islanding microgrid. An enhanced virtual impedance design is assumed in the conventional droop control scheme to manage distributed generation (DG) units to export the accurate reactive power in proportion to their rating. A point of common coupling (PCC) voltage restoration control is implemented to eliminate the PCC voltage deviation produced by the droop control effect and voltage drop effect on the impedance. This control scheme of each individual DG unit was designed to only use the locally measured feedback variables of inverter. It can realize accurate reactive power sharing and guarantee the PCC voltage quality. Matlab simulations are presented to show the effectiveness of proposed control performance in islanding microgrid.
{"title":"An improved power sharing control scheme of distributed generation converters in microgrid","authors":"Guangqian Ding, F. Gao, Quanrui Hao, Song Zhang","doi":"10.1109/PEAC.2014.7037884","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7037884","url":null,"abstract":"This paper proposes an improved power sharing control scheme to achieve the accurate power sharing control and offer an improved PCC voltage regulation capability in islanding microgrid. An enhanced virtual impedance design is assumed in the conventional droop control scheme to manage distributed generation (DG) units to export the accurate reactive power in proportion to their rating. A point of common coupling (PCC) voltage restoration control is implemented to eliminate the PCC voltage deviation produced by the droop control effect and voltage drop effect on the impedance. This control scheme of each individual DG unit was designed to only use the locally measured feedback variables of inverter. It can realize accurate reactive power sharing and guarantee the PCC voltage quality. Matlab simulations are presented to show the effectiveness of proposed control performance in islanding microgrid.","PeriodicalId":309780,"journal":{"name":"2014 International Power Electronics and Application Conference and Exposition","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133588995","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 : 2014-11-01DOI: 10.1109/PEAC.2014.7038081
Jianbo Yang, A. Faris, Weiping Zhang
A LC filter can be added to the input of the conventional buck converter to make the converter operate in discontinuous capacitor voltage mode. In this mode, the converter obtains the inherent power factor correction. Besides, both the input and output current will be continuous. This makes it possible for the converter operating at a high power level range. The input current will follow the input voltage automatically by a simple constant duty cycle control. This paper presents a detailed operation analysis of the converter operating in discontinuous capacitor voltage mode. And a 36V/100W prototype was built to verify the theoretical results.
{"title":"Operation analysis for Buck PFC converter in discontinuous capacitor voltage mode","authors":"Jianbo Yang, A. Faris, Weiping Zhang","doi":"10.1109/PEAC.2014.7038081","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7038081","url":null,"abstract":"A LC filter can be added to the input of the conventional buck converter to make the converter operate in discontinuous capacitor voltage mode. In this mode, the converter obtains the inherent power factor correction. Besides, both the input and output current will be continuous. This makes it possible for the converter operating at a high power level range. The input current will follow the input voltage automatically by a simple constant duty cycle control. This paper presents a detailed operation analysis of the converter operating in discontinuous capacitor voltage mode. And a 36V/100W prototype was built to verify the theoretical results.","PeriodicalId":309780,"journal":{"name":"2014 International Power Electronics and Application Conference and Exposition","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122344072","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 : 2014-11-01DOI: 10.1109/PEAC.2014.7037820
Xiaoxia Liang, Jinbin Zhao, K. Qu, Jia-Bao Dai
In order to increase the output voltage range of photovoltaic panels, battery and fuel cell monomer efficiently in the distributed generation system, In this paper, a novel Z-source high step-up boost converter is presented. With a unique X-type Z-source network, clamping voltage of pump capacitor is improved. The proposed converter achieves a high voltage gain without an extremely switch duty cycle. In order to prove above results, detailed steady-state analyses were introduced, and a 50V/300V, 5A prototype converter was built. Simulation results verify the theoretical analysis.
{"title":"Novel Z-source high step-up boost converter","authors":"Xiaoxia Liang, Jinbin Zhao, K. Qu, Jia-Bao Dai","doi":"10.1109/PEAC.2014.7037820","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7037820","url":null,"abstract":"In order to increase the output voltage range of photovoltaic panels, battery and fuel cell monomer efficiently in the distributed generation system, In this paper, a novel Z-source high step-up boost converter is presented. With a unique X-type Z-source network, clamping voltage of pump capacitor is improved. The proposed converter achieves a high voltage gain without an extremely switch duty cycle. In order to prove above results, detailed steady-state analyses were introduced, and a 50V/300V, 5A prototype converter was built. Simulation results verify the theoretical analysis.","PeriodicalId":309780,"journal":{"name":"2014 International Power Electronics and Application Conference and Exposition","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115956345","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 : 2014-11-01DOI: 10.1109/PEAC.2014.7037823
L. Xue, Ping-Jian Wang, Yi-feng Wang, Wei Li
A novel high step-up DC-DC converter is proposed in this paper. In this paper, interleaved inductors are utilized to combine with switched capacitors to generate a simple circuit structure. This topology aims to reduce current stress in low-voltage side further, decrease voltage stress in high-voltage side, and to achieve output voltage regulation with a wide range input. The operating principles and steady-state analyses of 4-phase proposed converter are discussed. Finally, a 200W prototype with 24V input voltage is implemented to verify the performance.
{"title":"High step-up DC-DC converter with switched capacitors and interleaved inductors","authors":"L. Xue, Ping-Jian Wang, Yi-feng Wang, Wei Li","doi":"10.1109/PEAC.2014.7037823","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7037823","url":null,"abstract":"A novel high step-up DC-DC converter is proposed in this paper. In this paper, interleaved inductors are utilized to combine with switched capacitors to generate a simple circuit structure. This topology aims to reduce current stress in low-voltage side further, decrease voltage stress in high-voltage side, and to achieve output voltage regulation with a wide range input. The operating principles and steady-state analyses of 4-phase proposed converter are discussed. Finally, a 200W prototype with 24V input voltage is implemented to verify the performance.","PeriodicalId":309780,"journal":{"name":"2014 International Power Electronics and Application Conference and Exposition","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116474837","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 : 2014-11-01DOI: 10.1109/PEAC.2014.7037821
Hongfei Ma, Bo Zhang, D. Qiu, Junfeng Han
This paper proposes a novel high gain DC-DC converter, the core structure of the circuit is a bridge which is composed of two power switches and two equivalent voltage sources. The two equivalent voltage sources are charged in parallel during the two switches turn on and are discharged in series during the two switches turn off, which makes the converter produce high output voltage to realize high voltage gain without extremely large duty cycle. In addition, the equivalent source is implemented by using coupled inductor voltage multiplier technique, which can further improve voltage gain and reduce switch voltage stress. The simulation and experimental results verify the correctness of the converter derivation and analysis.
{"title":"A novel high gain DC-DC converter with coupled inductor voltage multiplier","authors":"Hongfei Ma, Bo Zhang, D. Qiu, Junfeng Han","doi":"10.1109/PEAC.2014.7037821","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7037821","url":null,"abstract":"This paper proposes a novel high gain DC-DC converter, the core structure of the circuit is a bridge which is composed of two power switches and two equivalent voltage sources. The two equivalent voltage sources are charged in parallel during the two switches turn on and are discharged in series during the two switches turn off, which makes the converter produce high output voltage to realize high voltage gain without extremely large duty cycle. In addition, the equivalent source is implemented by using coupled inductor voltage multiplier technique, which can further improve voltage gain and reduce switch voltage stress. The simulation and experimental results verify the correctness of the converter derivation and analysis.","PeriodicalId":309780,"journal":{"name":"2014 International Power Electronics and Application Conference and Exposition","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116481878","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 : 2014-11-01DOI: 10.1109/PEAC.2014.7037967
Yongchang Zhang, Yubin Peng
Conventional model predictive current control (M-PCC) uses the discrete-time system model to select the best voltage vector by minimizing a cost function, which is related to the current errors. However, due to the limited number of voltage vectors in two-level converters, the sampling frequency has to be high to achieve satisfactory performance. To improve the steady state performance of conventional single-vector-based MPCC, this paper proposes an improved MPCC with optimal duty cycle for a three-phase ac/dc converter. The proposed method allocates only a fraction of control period to the voltage vector selected from conventional MPCC and the rest of time for a zero vector. The duration of the selected voltage vector is obtained based on the principle of current error minimization. Both simulation and experimental results validate the effectiveness of the proposed method.
{"title":"Model predictive current control with optimal duty cycle for three-phase grid-connected AC/DC converters","authors":"Yongchang Zhang, Yubin Peng","doi":"10.1109/PEAC.2014.7037967","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7037967","url":null,"abstract":"Conventional model predictive current control (M-PCC) uses the discrete-time system model to select the best voltage vector by minimizing a cost function, which is related to the current errors. However, due to the limited number of voltage vectors in two-level converters, the sampling frequency has to be high to achieve satisfactory performance. To improve the steady state performance of conventional single-vector-based MPCC, this paper proposes an improved MPCC with optimal duty cycle for a three-phase ac/dc converter. The proposed method allocates only a fraction of control period to the voltage vector selected from conventional MPCC and the rest of time for a zero vector. The duration of the selected voltage vector is obtained based on the principle of current error minimization. Both simulation and experimental results validate the effectiveness of the proposed method.","PeriodicalId":309780,"journal":{"name":"2014 International Power Electronics and Application Conference and Exposition","volume":"336 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116218568","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}
In this paper, a novel power electronic transformer (PET) structure for dc power distribution system is proposed. The proposed converter can achieve very high voltage conversion ratio with high frequency isolation and bidirectional energy flow, thus it can be used as the interface equipment of high voltage and low voltage dc power grid. Different from the conventional structure, only one high frequency transformer is used in the proposed structure, reducing the fabricating cost. Based on the proposed topology, phase shift control method is introduced to output the required power and balance the submodule voltage. A 100kW simulation model is built up in Simulink/MATLAB. The simulation results verify the proposed converter and control method.
{"title":"Power electronic transformer for dc power distribution network","authors":"Zhaohui Wang, Zhen Zhang, Junming Zhang, Kuang Sheng","doi":"10.1109/PEAC.2014.7037961","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7037961","url":null,"abstract":"In this paper, a novel power electronic transformer (PET) structure for dc power distribution system is proposed. The proposed converter can achieve very high voltage conversion ratio with high frequency isolation and bidirectional energy flow, thus it can be used as the interface equipment of high voltage and low voltage dc power grid. Different from the conventional structure, only one high frequency transformer is used in the proposed structure, reducing the fabricating cost. Based on the proposed topology, phase shift control method is introduced to output the required power and balance the submodule voltage. A 100kW simulation model is built up in Simulink/MATLAB. The simulation results verify the proposed converter and control method.","PeriodicalId":309780,"journal":{"name":"2014 International Power Electronics and Application Conference and Exposition","volume":"335 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115668712","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 : 2014-11-01DOI: 10.1109/PEAC.2014.7038018
Dongbin Zhao, F. Lin, Zhongping Yang
In this paper, the mathematical model of the PMSM (permanent magnet synchronous motor) traction drive system is established. After the linearization of the model, the equation of state which takes the fluctuations of the DC traction voltage as input is deduced. Then the effects of the distance between the substation and the motor, the speed of the motor and the dc-link inductor on the PMSM traction drive system are analyzed by using the zero-pole map when the voltage of the DC traction network waved. At last, the simulation results proves the validity of the analysis.
{"title":"Effects of the traction network voltage fluctuation on the permanent magnet synchronous traction drive system","authors":"Dongbin Zhao, F. Lin, Zhongping Yang","doi":"10.1109/PEAC.2014.7038018","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7038018","url":null,"abstract":"In this paper, the mathematical model of the PMSM (permanent magnet synchronous motor) traction drive system is established. After the linearization of the model, the equation of state which takes the fluctuations of the DC traction voltage as input is deduced. Then the effects of the distance between the substation and the motor, the speed of the motor and the dc-link inductor on the PMSM traction drive system are analyzed by using the zero-pole map when the voltage of the DC traction network waved. At last, the simulation results proves the validity of the analysis.","PeriodicalId":309780,"journal":{"name":"2014 International Power Electronics and Application Conference and Exposition","volume":"187 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123358246","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 : 2014-11-01DOI: 10.1109/PEAC.2014.7038063
Mei Liang, T. Zheng, Yan Li
Silicon carbide (SiC) semiconductor devices have received extensive attention with the better performance of the wide band gap material. It is necessary to compare with their silicon (Si) counterparts due to SiC semiconductor devices are new. In this paper, a test platform based on buck converter is constructed to test the switching characteristics of SiC MOSFET, Si CoolMOS and IGBT, the input voltage of which is 400V, the output current of which is 4-10A. Switching waveforms, switching times, switching energy losses, dv/dt, di/dt and reverse recovery characteristic of internal diodes of three devices are presented. Finally, theoretical efficiencies and tested efficiencies of a 2kW dual active bridge (DAB) converter are compared.
{"title":"Performance evaluation of SiC MOSFET, Si CoolMOS and IGBT","authors":"Mei Liang, T. Zheng, Yan Li","doi":"10.1109/PEAC.2014.7038063","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7038063","url":null,"abstract":"Silicon carbide (SiC) semiconductor devices have received extensive attention with the better performance of the wide band gap material. It is necessary to compare with their silicon (Si) counterparts due to SiC semiconductor devices are new. In this paper, a test platform based on buck converter is constructed to test the switching characteristics of SiC MOSFET, Si CoolMOS and IGBT, the input voltage of which is 400V, the output current of which is 4-10A. Switching waveforms, switching times, switching energy losses, dv/dt, di/dt and reverse recovery characteristic of internal diodes of three devices are presented. Finally, theoretical efficiencies and tested efficiencies of a 2kW dual active bridge (DAB) converter are compared.","PeriodicalId":309780,"journal":{"name":"2014 International Power Electronics and Application Conference and Exposition","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121720977","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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