This paper proposes a sensorless IPMSM position control system based on a high frequency injection method. The proposed method uses 12-bit low resolution A/D converters to covert the stator currents of the IPMSM. In addition, a 0.67kHz injection voltage, which has a 30 V amplitude, is used. By measuring the stator currents, the injection current components related to the injection voltage can be obtained. Then an estimation method is proposed to obtain the estimated rotor position. After that, a compensation algorithm related to the saturation of the mutual inductance is implemented to reduce the rotor position estimation margin of error. Finally, a closed-loop system based on the high frequency injection method is implemented. Measured results show the proposed method can achieve satisfactory performance with a margin of error of only ±4 degree.
{"title":"Sensorless IPMSM position control system using a high frequency injection method","authors":"Tian‐Hua Liu, Shao-Kai Tseng, Ting-Wei Lin, Jui-Ling Chen","doi":"10.1109/SPEC.2016.7845526","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7845526","url":null,"abstract":"This paper proposes a sensorless IPMSM position control system based on a high frequency injection method. The proposed method uses 12-bit low resolution A/D converters to covert the stator currents of the IPMSM. In addition, a 0.67kHz injection voltage, which has a 30 V amplitude, is used. By measuring the stator currents, the injection current components related to the injection voltage can be obtained. Then an estimation method is proposed to obtain the estimated rotor position. After that, a compensation algorithm related to the saturation of the mutual inductance is implemented to reduce the rotor position estimation margin of error. Finally, a closed-loop system based on the high frequency injection method is implemented. Measured results show the proposed method can achieve satisfactory performance with a margin of error of only ±4 degree.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121273771","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 : 2016-12-01DOI: 10.1109/SPEC.2016.7846126
Daming Zhang
This paper presents a new method for operating microgrid. Basic control methodology is to de-couple PQ control for grid-forming distributed generator (DG) whose new extra role is to act as reactive power sensor besides generating real power into the microgrid. Reactive power from the grid-forming DG is transferred to and from the instantaneous var compensator when there is a switch-in or switch-off of inductive load. By doing so, accurate control of real power becomes feasible so long its reactive power output is kept at low value. Generations of real power reference of both grid-forming and grid-supporting DGs are based on voltage variation at their terminals, so they don't need instruction from energy management center and are de-centralized. A multiplying factor is introduced to expedite such real-time real power reference generation to cope with fast switch-in and switch-off of large loads. Each of grid-forming and grid-feeding DGs performs within their respective generation capability. The system steady-state voltages can be maintained almost at rated value. The system operates at constant 50Hz. The proposed method is validated using real-time modeling in SIMULINK.
{"title":"Operation of islanded microgrid at constant frequency with distributed grid-supporting generators","authors":"Daming Zhang","doi":"10.1109/SPEC.2016.7846126","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7846126","url":null,"abstract":"This paper presents a new method for operating microgrid. Basic control methodology is to de-couple PQ control for grid-forming distributed generator (DG) whose new extra role is to act as reactive power sensor besides generating real power into the microgrid. Reactive power from the grid-forming DG is transferred to and from the instantaneous var compensator when there is a switch-in or switch-off of inductive load. By doing so, accurate control of real power becomes feasible so long its reactive power output is kept at low value. Generations of real power reference of both grid-forming and grid-supporting DGs are based on voltage variation at their terminals, so they don't need instruction from energy management center and are de-centralized. A multiplying factor is introduced to expedite such real-time real power reference generation to cope with fast switch-in and switch-off of large loads. Each of grid-forming and grid-feeding DGs performs within their respective generation capability. The system steady-state voltages can be maintained almost at rated value. The system operates at constant 50Hz. The proposed method is validated using real-time modeling in SIMULINK.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128011200","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 : 2016-12-01DOI: 10.1109/SPEC.2016.7846022
A. Razi, Ahmad Syafiq Ab Wahab, S. A. A. Shukor
Nowadays, power electronics inverters are widely used due to the increasing of the power demand. Thus the device such as multilevel inverter was used to perform the required energy conversion. However, multilevel inverter is operated without harmonic-less. This total harmonic distortion (THD) producing from multilevel inverter is generated from the sinusoidal output waveform. This paper presents level-shifted SPWM technique of single-phase 5-level Cascaded H-Bridge (CHB) inverter. This research aims of assessing the importance of accuracy of the pattern of the wave shape and harmonic distortions of the output voltage by controlling the modulation indices. The proposed method uses Phase Opposite Disposition (POD) modulation strategy to evaluate the waveform and harmonic performances. The simulation results were verified through experimental study.
{"title":"Improved wave shape-pattern performance using Phase Opposite Disposition (POD) method for cascaded multilevel inverter","authors":"A. Razi, Ahmad Syafiq Ab Wahab, S. A. A. Shukor","doi":"10.1109/SPEC.2016.7846022","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7846022","url":null,"abstract":"Nowadays, power electronics inverters are widely used due to the increasing of the power demand. Thus the device such as multilevel inverter was used to perform the required energy conversion. However, multilevel inverter is operated without harmonic-less. This total harmonic distortion (THD) producing from multilevel inverter is generated from the sinusoidal output waveform. This paper presents level-shifted SPWM technique of single-phase 5-level Cascaded H-Bridge (CHB) inverter. This research aims of assessing the importance of accuracy of the pattern of the wave shape and harmonic distortions of the output voltage by controlling the modulation indices. The proposed method uses Phase Opposite Disposition (POD) modulation strategy to evaluate the waveform and harmonic performances. The simulation results were verified through experimental study.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132750145","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 : 2016-12-01DOI: 10.1109/SPEC.2016.7846068
Jin Jia, H. Omori, Masahiro Tsuno, T. Morizane, N. Kimura, M. Nakaoka
This paper is mainly about the efficiency and leakage magnetic field of five types of power transfer coils with different structures in a magnetic resonant WPT system with a single-ended inverter. Five pairs of square coils have been formed, so as to compare the efficiency and magnetic field reducing effects by simulation.
{"title":"A comparative study on efficiency and leakage magnetic field of transfer coils with different structures in a magnetic resonant WPT system","authors":"Jin Jia, H. Omori, Masahiro Tsuno, T. Morizane, N. Kimura, M. Nakaoka","doi":"10.1109/SPEC.2016.7846068","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7846068","url":null,"abstract":"This paper is mainly about the efficiency and leakage magnetic field of five types of power transfer coils with different structures in a magnetic resonant WPT system with a single-ended inverter. Five pairs of square coils have been formed, so as to compare the efficiency and magnetic field reducing effects by simulation.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134641665","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 : 2016-12-01DOI: 10.1109/SPEC.2016.7846157
Gang Zhang, Yongheng Yang, F. Iannuzzo, Kai Li, F. Blaabjerg, Hongbing Xu
The three-level (3L) Active Neutral-Point-Clamped (ANPC) topology has been introduced to resolve the uneven loss distribution issue in the classical 3L Neutral-Point-Clamped (NPC) topology. The Pulse-Width-Modulation (PWM) strategy is then an important means to fully explore the potential benefits of the 3L-ANPC topology. This paper presents a novel loss balancing modulation strategy — Splitting Switching Loss Distribution PWM (SSLD-PWM) strategy to achieve more even loss distribution in the 3L-ANPC converter. Basically, in the proposed PWM strategy, the switching-on losses and switching-off losses are separated in order to improve the loss distribution among the power devices. A comparison between the proposed strategy and other major PWM strategies for the loss distribution is also carried out in this paper. Benchmarking results show that the proposed strategy has effective and superior performance in contrast to the prior-art PWM strategies in terms of even power loss distribution.
{"title":"Loss distribution analysis of three-level active neutral-point-clamped (3L-ANPC) converter with different PWM strategies","authors":"Gang Zhang, Yongheng Yang, F. Iannuzzo, Kai Li, F. Blaabjerg, Hongbing Xu","doi":"10.1109/SPEC.2016.7846157","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7846157","url":null,"abstract":"The three-level (3L) Active Neutral-Point-Clamped (ANPC) topology has been introduced to resolve the uneven loss distribution issue in the classical 3L Neutral-Point-Clamped (NPC) topology. The Pulse-Width-Modulation (PWM) strategy is then an important means to fully explore the potential benefits of the 3L-ANPC topology. This paper presents a novel loss balancing modulation strategy — Splitting Switching Loss Distribution PWM (SSLD-PWM) strategy to achieve more even loss distribution in the 3L-ANPC converter. Basically, in the proposed PWM strategy, the switching-on losses and switching-off losses are separated in order to improve the loss distribution among the power devices. A comparison between the proposed strategy and other major PWM strategies for the loss distribution is also carried out in this paper. Benchmarking results show that the proposed strategy has effective and superior performance in contrast to the prior-art PWM strategies in terms of even power loss distribution.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134148382","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 : 2016-12-01DOI: 10.1109/SPEC.2016.7846215
Monaaf D. A. Al-Falahi, Kutaiba Sabah Nimma, S. Jayasinghe, H. Enshaei
This paper presents optimal sizing, modeling and performance analysis of a standalone PV/Wind/Battery Hybrid Energy System (PWB-HES) for an off-grid residential application in Ansons Bay, Tasmania, Australia. The aim of the study is to find the optimal size of the photovoltaic (PV) panel, wind generation system (WGS) and battery storage (BS) that can satisfy the varying load demand throughout the year. In the proposed PWB-HES sources and the battery are connected to a common DC bus. A voltage source inverter is used to connect the dc bus to the ac side. The optimal combination of sources and energy storage was obtained based on solar irradiance, wind speed and typical residential demand of the selected site. The optimal sizing algorithm was implemented using the HOMER software. The optimal system is then modeled and simulated with SIMULINK software in order to examine the complementary characteristics of the solar and the wind power system to satisfy the load demand. Simulation results showed that the PWB-HES with optimal size obtained through HOMER is able to meet the load demand amidst the changes in solar irradiance and wind speed.
{"title":"Sizing and modeling of a standalone hybrid renewable energy system","authors":"Monaaf D. A. Al-Falahi, Kutaiba Sabah Nimma, S. Jayasinghe, H. Enshaei","doi":"10.1109/SPEC.2016.7846215","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7846215","url":null,"abstract":"This paper presents optimal sizing, modeling and performance analysis of a standalone PV/Wind/Battery Hybrid Energy System (PWB-HES) for an off-grid residential application in Ansons Bay, Tasmania, Australia. The aim of the study is to find the optimal size of the photovoltaic (PV) panel, wind generation system (WGS) and battery storage (BS) that can satisfy the varying load demand throughout the year. In the proposed PWB-HES sources and the battery are connected to a common DC bus. A voltage source inverter is used to connect the dc bus to the ac side. The optimal combination of sources and energy storage was obtained based on solar irradiance, wind speed and typical residential demand of the selected site. The optimal sizing algorithm was implemented using the HOMER software. The optimal system is then modeled and simulated with SIMULINK software in order to examine the complementary characteristics of the solar and the wind power system to satisfy the load demand. Simulation results showed that the PWB-HES with optimal size obtained through HOMER is able to meet the load demand amidst the changes in solar irradiance and wind speed.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129126578","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 : 2016-12-01DOI: 10.1109/SPEC.2016.7846158
S. Bhadra, D. Gregory, H. Patangia
Selective Harmonic Elimination (SHE) is an established technique to eliminate unwanted harmonics that causes aliasing effect in communication systems and affects power quality in electrical systems. In this paper, an analytical approach for SHE is proposed for harmonic elimination in a multilevel inverter. Traditionally, numerical methods like Newton Raphson Algorithm are opted to solve the transcendental SHE equations. The disadvantage in iterative computation is overhead in computational effort and the solution time can be problematic in real-time operation. Additionally, the numerical methods are sensitive to initial values and produce just one solution depending on the initial values. It doesn't provide insight into the possible solution sets. The closed-form equations generate the appropriate transition angles, single or multiples and the modulation ratio can be programmed into a microcontroller to vary the fundamental while eliminating the targeted harmonics. The approach has been illustrated to eliminate up to 7th harmonic in a seven level single phase inverter and up to 11th in a three phase system (no triplen harmonic elimination). Simulation results are included to verify theoretical formulation. A low voltage seven level inverter was built with a H-bridge and the experimental results verify the theoretical findings. Results include both single phase and triplen systems.
{"title":"An analytical solution of switching angles for Selective Harmonic Elimination (SHE) in a cascaded seven level inverter","authors":"S. Bhadra, D. Gregory, H. Patangia","doi":"10.1109/SPEC.2016.7846158","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7846158","url":null,"abstract":"Selective Harmonic Elimination (SHE) is an established technique to eliminate unwanted harmonics that causes aliasing effect in communication systems and affects power quality in electrical systems. In this paper, an analytical approach for SHE is proposed for harmonic elimination in a multilevel inverter. Traditionally, numerical methods like Newton Raphson Algorithm are opted to solve the transcendental SHE equations. The disadvantage in iterative computation is overhead in computational effort and the solution time can be problematic in real-time operation. Additionally, the numerical methods are sensitive to initial values and produce just one solution depending on the initial values. It doesn't provide insight into the possible solution sets. The closed-form equations generate the appropriate transition angles, single or multiples and the modulation ratio can be programmed into a microcontroller to vary the fundamental while eliminating the targeted harmonics. The approach has been illustrated to eliminate up to 7th harmonic in a seven level single phase inverter and up to 11th in a three phase system (no triplen harmonic elimination). Simulation results are included to verify theoretical formulation. A low voltage seven level inverter was built with a H-bridge and the experimental results verify the theoretical findings. Results include both single phase and triplen systems.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134393790","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 : 2016-12-01DOI: 10.1109/SPEC.2016.7845998
Wan Tianfeng, Liu Xin, T. Hou-jun, Dong Yayun, Yang Xi-jun
In many practical applications of wireless power transfer (WPT) system, high power transmission efficiency is required and has been widely studied as an important issue. This paper presents and analyzes a Series-Parallel compensated WPT system with a Z-source inverter network inserted. To obtain higher efficiency, asymmetrical voltage-cancellation (AVC) control is applied and the ZVS operation is achieved. The AVC control algorithm should also be modified to help Z-source inverter to realize voltage boosted and fully utilize the null state existed in the AVC control. On account of the ZVS operation, the power factor of the system decreases inevitably, but it decreases less in Series-Parallel compensated topology than in Series-Series compensated topology. To verify the feasibility of the proposed method, a small-signal model is fully analyzed, and a controller is designed to help to realize AVC control. Finally, a simulation model is established and the result agrees with the analysis.
{"title":"Modeling and advanced control of wireless power transfer system with Z-source inverter","authors":"Wan Tianfeng, Liu Xin, T. Hou-jun, Dong Yayun, Yang Xi-jun","doi":"10.1109/SPEC.2016.7845998","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7845998","url":null,"abstract":"In many practical applications of wireless power transfer (WPT) system, high power transmission efficiency is required and has been widely studied as an important issue. This paper presents and analyzes a Series-Parallel compensated WPT system with a Z-source inverter network inserted. To obtain higher efficiency, asymmetrical voltage-cancellation (AVC) control is applied and the ZVS operation is achieved. The AVC control algorithm should also be modified to help Z-source inverter to realize voltage boosted and fully utilize the null state existed in the AVC control. On account of the ZVS operation, the power factor of the system decreases inevitably, but it decreases less in Series-Parallel compensated topology than in Series-Series compensated topology. To verify the feasibility of the proposed method, a small-signal model is fully analyzed, and a controller is designed to help to realize AVC control. Finally, a simulation model is established and the result agrees with the analysis.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134554076","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 : 2016-12-01DOI: 10.1109/SPEC.2016.7846200
Ngoc Dat Dao, Dong-Choon Lee
In this paper, a new operating scheme for five-level hybrid flying-capacitor (5L-HFC) inverters is proposed, of which structure is derived from the conventional five-level active neutral-point-clamped (5L-ANPC) topology by splitting the DC-link into three capacitors in series. In this inverter, the lower number of switching devices is required, thus its cost is reduced considerably compared with the existing five-level inverter topologies. In addition, a balancing scheme of the DC-link and flying capacitor voltages is developed. Simulation and experiment results have verified the validity of the proposed topology.
{"title":"A novel operating scheme of five-level hybrid inverters for medium voltage applications","authors":"Ngoc Dat Dao, Dong-Choon Lee","doi":"10.1109/SPEC.2016.7846200","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7846200","url":null,"abstract":"In this paper, a new operating scheme for five-level hybrid flying-capacitor (5L-HFC) inverters is proposed, of which structure is derived from the conventional five-level active neutral-point-clamped (5L-ANPC) topology by splitting the DC-link into three capacitors in series. In this inverter, the lower number of switching devices is required, thus its cost is reduced considerably compared with the existing five-level inverter topologies. In addition, a balancing scheme of the DC-link and flying capacitor voltages is developed. Simulation and experiment results have verified the validity of the proposed topology.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133907716","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 : 2016-12-01DOI: 10.1109/SPEC.2016.7846011
Yayun Dong, Wenwen Li, Weikun Cai, C. Yao, D. Ma, Houjun Tang
In this paper, we propose a concise unit-cell design of magnetic metamaterial. The effective permeability of the unit cell is derived by S parameter method and can be flexibly adjusted to meet specific requirements. 6×6 planar metamaterial slabs are constructed by the proposed unit cells to verify their effects in a 6.78MHz wireless power transfer system. The effects of 1-slab and 2-slab metamaterials on efficiency enhancement are analyzed by both S parameter measurement and power experiment. The optimal position of the 1-slab metamaterial and the optimal gap between two slabs are acquired by analyzing the transmission and reflection coefficients of the system. Finally, we set up a medium-power wireless power transfer system to explicitly demonstrate the efficiency enhancement by lighting up a 15W light bulb.
{"title":"Experimental investigation of 6.78MHz metamaterials for efficiency enhancement of wireless power transfer system","authors":"Yayun Dong, Wenwen Li, Weikun Cai, C. Yao, D. Ma, Houjun Tang","doi":"10.1109/SPEC.2016.7846011","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7846011","url":null,"abstract":"In this paper, we propose a concise unit-cell design of magnetic metamaterial. The effective permeability of the unit cell is derived by S parameter method and can be flexibly adjusted to meet specific requirements. 6×6 planar metamaterial slabs are constructed by the proposed unit cells to verify their effects in a 6.78MHz wireless power transfer system. The effects of 1-slab and 2-slab metamaterials on efficiency enhancement are analyzed by both S parameter measurement and power experiment. The optimal position of the 1-slab metamaterial and the optimal gap between two slabs are acquired by analyzing the transmission and reflection coefficients of the system. Finally, we set up a medium-power wireless power transfer system to explicitly demonstrate the efficiency enhancement by lighting up a 15W light bulb.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133566009","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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