Pub Date : 2012-06-02DOI: 10.1109/IPEMC.2012.6259267
Shu-mei Cui, Ge Hao
Variable-reluctance (VR) resolver is often applied in Electric Vehicles as the motor speed and position sensor for its outstanding reliability and durability. This paper introduces the operation principles and optimized design guidelines of the variable-reluctance (VR) resolver. The number of the stator teeth is determined based on the theory of fractional slot sinusoidal windings, and a special stator structure with slotted teeth is proposed. Simulation and Experiments are carried out to test the angular position accuracy, verifying the feasibility and effectiveness of the optimization methods.
{"title":"Stator structure design and analysis of variable reluctance resolver for hybrid-vehicle motor drive","authors":"Shu-mei Cui, Ge Hao","doi":"10.1109/IPEMC.2012.6259267","DOIUrl":"https://doi.org/10.1109/IPEMC.2012.6259267","url":null,"abstract":"Variable-reluctance (VR) resolver is often applied in Electric Vehicles as the motor speed and position sensor for its outstanding reliability and durability. This paper introduces the operation principles and optimized design guidelines of the variable-reluctance (VR) resolver. The number of the stator teeth is determined based on the theory of fractional slot sinusoidal windings, and a special stator structure with slotted teeth is proposed. Simulation and Experiments are carried out to test the angular position accuracy, verifying the feasibility and effectiveness of the optimization methods.","PeriodicalId":236136,"journal":{"name":"Proceedings of The 7th International Power Electronics and Motion Control Conference","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126038162","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 : 2012-06-02DOI: 10.1109/IPEMC.2012.6258916
A. Jurkov, L. Roslaniec, D. Perreault
A lossless multi-way power combining and outphasing system has recently been proposed for high-frequency inverters and power amplifiers which offers major performance advantages over traditional approaches. This paper presents a new outphasing control strategy for the proposed system that enables output power control through effective load modulation of the inverters while minimizing loading admittance phase. Moreover, we present the first-ever experimental demonstration of the proposed outphasing system. The design of a 27.12 MHz, four-way power combining and outphasing system is described, and used to experimentally verify the power combiner's characteristics and evaluate the effectiveness of the proposed outphasing law to control output power over a 10:1 range.
{"title":"Lossless multi-way power combining and outphasing for high-frequency resonant inverters","authors":"A. Jurkov, L. Roslaniec, D. Perreault","doi":"10.1109/IPEMC.2012.6258916","DOIUrl":"https://doi.org/10.1109/IPEMC.2012.6258916","url":null,"abstract":"A lossless multi-way power combining and outphasing system has recently been proposed for high-frequency inverters and power amplifiers which offers major performance advantages over traditional approaches. This paper presents a new outphasing control strategy for the proposed system that enables output power control through effective load modulation of the inverters while minimizing loading admittance phase. Moreover, we present the first-ever experimental demonstration of the proposed outphasing system. The design of a 27.12 MHz, four-way power combining and outphasing system is described, and used to experimentally verify the power combiner's characteristics and evaluate the effectiveness of the proposed outphasing law to control output power over a 10:1 range.","PeriodicalId":236136,"journal":{"name":"Proceedings of The 7th International Power Electronics and Motion Control Conference","volume":"208 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126088947","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 : 2012-06-02DOI: 10.1109/IPEMC.2012.6258887
P. Tenca, L. Gertmar
The paper proposes a modular conversion concept with integrated energy storage for transferring energy between any combination of AC grids, DC grids and modular renewable parks whose sources need to be close to earth potential whereas the grids they feed feature much higher voltages. By relying on pairs of detachable energy storage elements featuring properly sized capacity, the conversion concept provides high-voltage galvanic insulation, high fault tolerance and simple frequency conversion among all grids without using any transformer. Each pair of energy storage elements is associated to a couple of AC/DC or DC/DC units constituting voltage source cells. In turn, each phase of a grid is structured modularly as proper parallel and series connections of such cells. The pivotal idea is to transfer energy by periodical exchange of the storage elements among the cells, while always avoiding any simultaneous galvanic contact among them. This simple principle assures galvanic insulation and high fault tolerance since the grids or renewable sources never exchange energy directly. The energy exchange is always indirect and mediated by the energy storage elements. Owing to this property no fault is propagated immediately among the interconnect grids and, until sufficient energy is present in the storage elements, one gains precious time for enterprising much better emergency actions in the grids, actions that would be otherwise impossible with the nowadays much reduced time scales. The exchange of storage elements by reconnection can rely on contacts, like the ones for high-voltage tap changers, and on different moving means, like Robots, if physical displacement is envisaged. This latter realization broadens the concept considerably because the storage elements can be transported, via autonomous vehicles, for the long distances which divide the energetically connected entities. A specific reconnection sequence of the storage elements assures their disconnection and reconnection at zero current, thereby maximizing the lifespan of the switches. Although the present state of the art in storage technologies renders the concept still uneconomical and unfeasible today, the ongoing technological advancements could open future scenarios one should be prepared to embrace. This paper is not about a conventional solution for today. It is about highlighting what could be futuristically possible in exchanging large amounts of energy among grids, and/or renewable sources, when material science will provide storage technologies with sufficiently high capacity and number of cycles.
{"title":"Transformerless conversion concept based on storage exchange for future fault tolerant and galvanic insulated interconnection of grids","authors":"P. Tenca, L. Gertmar","doi":"10.1109/IPEMC.2012.6258887","DOIUrl":"https://doi.org/10.1109/IPEMC.2012.6258887","url":null,"abstract":"The paper proposes a modular conversion concept with integrated energy storage for transferring energy between any combination of AC grids, DC grids and modular renewable parks whose sources need to be close to earth potential whereas the grids they feed feature much higher voltages. By relying on pairs of detachable energy storage elements featuring properly sized capacity, the conversion concept provides high-voltage galvanic insulation, high fault tolerance and simple frequency conversion among all grids without using any transformer. Each pair of energy storage elements is associated to a couple of AC/DC or DC/DC units constituting voltage source cells. In turn, each phase of a grid is structured modularly as proper parallel and series connections of such cells. The pivotal idea is to transfer energy by periodical exchange of the storage elements among the cells, while always avoiding any simultaneous galvanic contact among them. This simple principle assures galvanic insulation and high fault tolerance since the grids or renewable sources never exchange energy directly. The energy exchange is always indirect and mediated by the energy storage elements. Owing to this property no fault is propagated immediately among the interconnect grids and, until sufficient energy is present in the storage elements, one gains precious time for enterprising much better emergency actions in the grids, actions that would be otherwise impossible with the nowadays much reduced time scales. The exchange of storage elements by reconnection can rely on contacts, like the ones for high-voltage tap changers, and on different moving means, like Robots, if physical displacement is envisaged. This latter realization broadens the concept considerably because the storage elements can be transported, via autonomous vehicles, for the long distances which divide the energetically connected entities. A specific reconnection sequence of the storage elements assures their disconnection and reconnection at zero current, thereby maximizing the lifespan of the switches. Although the present state of the art in storage technologies renders the concept still uneconomical and unfeasible today, the ongoing technological advancements could open future scenarios one should be prepared to embrace. This paper is not about a conventional solution for today. It is about highlighting what could be futuristically possible in exchanging large amounts of energy among grids, and/or renewable sources, when material science will provide storage technologies with sufficiently high capacity and number of cycles.","PeriodicalId":236136,"journal":{"name":"Proceedings of The 7th International Power Electronics and Motion Control Conference","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123758140","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 : 2012-06-02DOI: 10.1109/IPEMC.2012.6259017
Gab-Su Seo, B. Cho, Kyu-Chan Lee
Electrolytic capacitors to suppress the voltage and current fluctuation at PV side should be deployed in AC interface to ensure high harvest efficiency which makes it difficult to guarantee the lifetime of PV inverters due to the short lifetime electrolytic capacitors. This paper proposes an electrolytic capacitor-less photovoltaic (PV) micro-converter interfaced with DC distribution system. The short-lifetime capacitors can be eliminated in the proposed DC interfaced structure by using film capacitors which is helpful not only to fully guarantee the lifetime of PV generation system but also improve the system efficiency. Directly interfaced to DC distribution system, the proposed boost-type PV micro-converter features simple structure and high efficiency. In this paper, AC and DC interfaced systems are analyzed in view of PV converter lifetime. Different from conventional power converters, PV converters should keep high efficiency even under 50% load operation due to the solar irradiation profile normally below half of the full irradiation. Because the PV converters are operated by light load efficiency improvement technique such as burst mode method, voltage variation in light load range should be considered. Based on the analysis of voltage variation with respect to the light load efficiency improvement methods, PV micro-converter design guide is presented. 140W prototype PV converter shows maximum efficiency of 97.3% and European efficiency of 96.8% achieving light load efficiency higher than 93% as well as high MPPT efficiency is expected, without electrolytic capacitors which verifies the feasibility of this study.
{"title":"Electrolytic capacitor-less PV converter for full lifetime guarantee interfaced with DC distribution","authors":"Gab-Su Seo, B. Cho, Kyu-Chan Lee","doi":"10.1109/IPEMC.2012.6259017","DOIUrl":"https://doi.org/10.1109/IPEMC.2012.6259017","url":null,"abstract":"Electrolytic capacitors to suppress the voltage and current fluctuation at PV side should be deployed in AC interface to ensure high harvest efficiency which makes it difficult to guarantee the lifetime of PV inverters due to the short lifetime electrolytic capacitors. This paper proposes an electrolytic capacitor-less photovoltaic (PV) micro-converter interfaced with DC distribution system. The short-lifetime capacitors can be eliminated in the proposed DC interfaced structure by using film capacitors which is helpful not only to fully guarantee the lifetime of PV generation system but also improve the system efficiency. Directly interfaced to DC distribution system, the proposed boost-type PV micro-converter features simple structure and high efficiency. In this paper, AC and DC interfaced systems are analyzed in view of PV converter lifetime. Different from conventional power converters, PV converters should keep high efficiency even under 50% load operation due to the solar irradiation profile normally below half of the full irradiation. Because the PV converters are operated by light load efficiency improvement technique such as burst mode method, voltage variation in light load range should be considered. Based on the analysis of voltage variation with respect to the light load efficiency improvement methods, PV micro-converter design guide is presented. 140W prototype PV converter shows maximum efficiency of 97.3% and European efficiency of 96.8% achieving light load efficiency higher than 93% as well as high MPPT efficiency is expected, without electrolytic capacitors which verifies the feasibility of this study.","PeriodicalId":236136,"journal":{"name":"Proceedings of The 7th International Power Electronics and Motion Control Conference","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125550222","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 : 2012-06-02DOI: 10.1109/IPEMC.2012.6259321
Shengqing Li, X. Luo, Yongan Li, Lilin Zeng, Zhengping He
There are diverse types of loads and power resources in microgrid, resulting in lots of power quality problems such as a large number of harmonics and voltage fluctuations. This paper established a unified math model of UPQC in micorgrid, a optimizing control method which based on the robust H2/H∞ controllers was proposed. Uncertain parameters of structures are introduced into state equation; meanwhile, both the H∞ disturbance suppression and the optimal H2 performances of the closed-loop control system are satisfied simultaneously for all allowable uncertainties. The robust H2/H∞ controller design was transformed into a optimal problem with constraints of linear matrix inequalities, the output feedback controllers can be applied. The theoretically analysis and simulation show it can get preferable control effect, fast dynamic response and good robustness.
{"title":"Research on robust H2/H∞ optimization control for unified power quality conditioner in micorgrid","authors":"Shengqing Li, X. Luo, Yongan Li, Lilin Zeng, Zhengping He","doi":"10.1109/IPEMC.2012.6259321","DOIUrl":"https://doi.org/10.1109/IPEMC.2012.6259321","url":null,"abstract":"There are diverse types of loads and power resources in microgrid, resulting in lots of power quality problems such as a large number of harmonics and voltage fluctuations. This paper established a unified math model of UPQC in micorgrid, a optimizing control method which based on the robust H2/H∞ controllers was proposed. Uncertain parameters of structures are introduced into state equation; meanwhile, both the H∞ disturbance suppression and the optimal H2 performances of the closed-loop control system are satisfied simultaneously for all allowable uncertainties. The robust H2/H∞ controller design was transformed into a optimal problem with constraints of linear matrix inequalities, the output feedback controllers can be applied. The theoretically analysis and simulation show it can get preferable control effect, fast dynamic response and good robustness.","PeriodicalId":236136,"journal":{"name":"Proceedings of The 7th International Power Electronics and Motion Control Conference","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126850514","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 : 2012-06-02DOI: 10.1109/IPEMC.2012.6259304
Xiaofeng Sun, Zhichao Lee, Lu Gong, Zhe Chen
The dramatic growth of power electronics applications have led to serious harmonic pollutions in the power system. Due to the changeable feature of system characteristic impedance, a curious phenomenon referred to the ‘whack-a-mole’ may occur when using the resistive active power filter (R-APF) to suppress the harmonic in a long distance distribution line. This paper proposes a new approach by installing an APF at the end of the line which is equivalent to the approximate infinitely long transmission line (I-APF, infinite active power filter), to eliminate the reflected wave and mitigate the background harmonic voltage in power distribution systems. The I-APF is able to maintain equivalent to infinitely long transmission line while system characteristic impedance varies under certain conditions that compensation factors of the APF are great enough. Simulations and experiments have been performed to verify the theoretical analysis and demonstrate the effectiveness of the proposed strategy.
{"title":"A novel control strategy of active filter for suppressing background harmonic voltage magnification in power distribution system","authors":"Xiaofeng Sun, Zhichao Lee, Lu Gong, Zhe Chen","doi":"10.1109/IPEMC.2012.6259304","DOIUrl":"https://doi.org/10.1109/IPEMC.2012.6259304","url":null,"abstract":"The dramatic growth of power electronics applications have led to serious harmonic pollutions in the power system. Due to the changeable feature of system characteristic impedance, a curious phenomenon referred to the ‘whack-a-mole’ may occur when using the resistive active power filter (R-APF) to suppress the harmonic in a long distance distribution line. This paper proposes a new approach by installing an APF at the end of the line which is equivalent to the approximate infinitely long transmission line (I-APF, infinite active power filter), to eliminate the reflected wave and mitigate the background harmonic voltage in power distribution systems. The I-APF is able to maintain equivalent to infinitely long transmission line while system characteristic impedance varies under certain conditions that compensation factors of the APF are great enough. Simulations and experiments have been performed to verify the theoretical analysis and demonstrate the effectiveness of the proposed strategy.","PeriodicalId":236136,"journal":{"name":"Proceedings of The 7th International Power Electronics and Motion Control Conference","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115183797","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 : 2012-06-02DOI: 10.1109/IPEMC.2012.6258881
Xiong Liu, P. Loh, Peng Wang, F. Blaabjerg
This paper proposes a multiple-input versatile matrix converter (VMC) to integrate hybrid ac/dc energy resources and storages to a power grid. The VMC is developed based on the indirect matrix converter (IMC) with its six-switch voltage source converter replaced by a nine-switch topology. The nine-switch converter can provide six input terminals for the connections of one three-phase ac source plus three dc sources to the grid. The three-phase utility grid is connected to the VMC's current source side. This configuration allows the input ac/dc sources' voltages lower than the grid voltage. The control and modulation schemes are proposed to extract the commanded current from the input ac/dc sources to the grid and guarantee high quality ac/dc inputs and ac output current waveforms with unity power factors. The proposed modulation scheme for sinusoidal outputs of the VMC is mathematically proved. The experimental results are provided to validate the effectiveness of the control and modulation schemes for the proposed VMC.
{"title":"A direct power conversion topology for grid integrations of hybrid AC/DC resources","authors":"Xiong Liu, P. Loh, Peng Wang, F. Blaabjerg","doi":"10.1109/IPEMC.2012.6258881","DOIUrl":"https://doi.org/10.1109/IPEMC.2012.6258881","url":null,"abstract":"This paper proposes a multiple-input versatile matrix converter (VMC) to integrate hybrid ac/dc energy resources and storages to a power grid. The VMC is developed based on the indirect matrix converter (IMC) with its six-switch voltage source converter replaced by a nine-switch topology. The nine-switch converter can provide six input terminals for the connections of one three-phase ac source plus three dc sources to the grid. The three-phase utility grid is connected to the VMC's current source side. This configuration allows the input ac/dc sources' voltages lower than the grid voltage. The control and modulation schemes are proposed to extract the commanded current from the input ac/dc sources to the grid and guarantee high quality ac/dc inputs and ac output current waveforms with unity power factors. The proposed modulation scheme for sinusoidal outputs of the VMC is mathematically proved. The experimental results are provided to validate the effectiveness of the control and modulation schemes for the proposed VMC.","PeriodicalId":236136,"journal":{"name":"Proceedings of The 7th International Power Electronics and Motion Control Conference","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115357437","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 : 2012-06-02DOI: 10.1109/IPEMC.2012.6259172
Daesik Kim, H. Cha
Lead-acid batteries are used for DC power system in nuclear power plants. Standards of periodic surveillance and determining battery capacity for the batteries in the nuclear power plant are summarized. This paper is investigated for environment service condition, specification, advantages and disadvantages of Class 1E battery bank. Class 1E batteries of nuclear power plants in Korea are summarized in terms of specification, such as capacity, discharge rate, bank configuration, discharge end voltage, etc. This paper summarizes standards, and performance test results of the battery in the nuclear power plant. Also this paper analyses performance test results during 12 years and compared performance degradation in the battery bank.
{"title":"Analysis on lead-acid battery bank for nuclear power plants in Korea","authors":"Daesik Kim, H. Cha","doi":"10.1109/IPEMC.2012.6259172","DOIUrl":"https://doi.org/10.1109/IPEMC.2012.6259172","url":null,"abstract":"Lead-acid batteries are used for DC power system in nuclear power plants. Standards of periodic surveillance and determining battery capacity for the batteries in the nuclear power plant are summarized. This paper is investigated for environment service condition, specification, advantages and disadvantages of Class 1E battery bank. Class 1E batteries of nuclear power plants in Korea are summarized in terms of specification, such as capacity, discharge rate, bank configuration, discharge end voltage, etc. This paper summarizes standards, and performance test results of the battery in the nuclear power plant. Also this paper analyses performance test results during 12 years and compared performance degradation in the battery bank.","PeriodicalId":236136,"journal":{"name":"Proceedings of The 7th International Power Electronics and Motion Control Conference","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122945949","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}
Because of the quantity of demand power depends on the power consumption of power demands on the loads, the utility grid has to secure a supply of electric energy which is larger than the required power consumption under peak load-condition. It means that the waste of electric power could be heavy at the other time than peak-load period. To avoid the waste of power, a 10kW rapid-charger system which has a function of load compensation at the peak-load condition is proposed in this paper. At the peak-load condition, the rapid charger transfer charged energy in the battery of electric vehicle to the grid. The 10kW rapid-charger for electric vehicle is comprised of the three-phase AC-DC PWM converter and isolated bidirectional DC-DC converter. Proposed V2G operation is verified through simulation experiment performed by 10kW rapid-charger.
{"title":"10kW rapid-charger for electric vehicle considering vehicle to grid(V2G)","authors":"Ga-Gang Choi, Doo-yong Jung, Sung-chon Choi, C. Won, Yong-Chae Jung, Jang-Hyoun Youm","doi":"10.1109/IPEMC.2012.6259283","DOIUrl":"https://doi.org/10.1109/IPEMC.2012.6259283","url":null,"abstract":"Because of the quantity of demand power depends on the power consumption of power demands on the loads, the utility grid has to secure a supply of electric energy which is larger than the required power consumption under peak load-condition. It means that the waste of electric power could be heavy at the other time than peak-load period. To avoid the waste of power, a 10kW rapid-charger system which has a function of load compensation at the peak-load condition is proposed in this paper. At the peak-load condition, the rapid charger transfer charged energy in the battery of electric vehicle to the grid. The 10kW rapid-charger for electric vehicle is comprised of the three-phase AC-DC PWM converter and isolated bidirectional DC-DC converter. Proposed V2G operation is verified through simulation experiment performed by 10kW rapid-charger.","PeriodicalId":236136,"journal":{"name":"Proceedings of The 7th International Power Electronics and Motion Control Conference","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114476814","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 : 2012-06-02DOI: 10.1109/IPEMC.2012.6259256
Shi-cheng Zheng, T. Cui, M. Cheng, Long Chen
Working principle of three-level topology and modulation algorithm of space vector pulse width modulation (SVPWM) has been analyzed. And a mathematical expression of the reference voltage has been deduced. Changing the output voltage and frequency synchronously has been realized by changing the dwell time of each vector. And the V/F control demand of electric motor is achieved. In addition, the balancing control strategy of capacitor neutral point voltage balance is presented based on the proposed SVPWM algorithm by adjusting the dwell time of small vector. Finally, the whole system simulation model has been built under the environment of Matlab. The theoretical derivations and control strategies have been verified by simulations. Simulation results show that there are many advantages by using three-level topology with SVPWM control scheme such as high utilization of DC voltage, low harmonics of output voltage, the constant V/f control strategy has been obtained. An important reference value is offered for digital realization of VVVF system in this paper.
{"title":"Research on variable frequency system with three-level topology and SVPWM control","authors":"Shi-cheng Zheng, T. Cui, M. Cheng, Long Chen","doi":"10.1109/IPEMC.2012.6259256","DOIUrl":"https://doi.org/10.1109/IPEMC.2012.6259256","url":null,"abstract":"Working principle of three-level topology and modulation algorithm of space vector pulse width modulation (SVPWM) has been analyzed. And a mathematical expression of the reference voltage has been deduced. Changing the output voltage and frequency synchronously has been realized by changing the dwell time of each vector. And the V/F control demand of electric motor is achieved. In addition, the balancing control strategy of capacitor neutral point voltage balance is presented based on the proposed SVPWM algorithm by adjusting the dwell time of small vector. Finally, the whole system simulation model has been built under the environment of Matlab. The theoretical derivations and control strategies have been verified by simulations. Simulation results show that there are many advantages by using three-level topology with SVPWM control scheme such as high utilization of DC voltage, low harmonics of output voltage, the constant V/f control strategy has been obtained. An important reference value is offered for digital realization of VVVF system in this paper.","PeriodicalId":236136,"journal":{"name":"Proceedings of The 7th International Power Electronics and Motion Control Conference","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114568017","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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