Pub Date : 2018-10-22DOI: 10.23919/IPEC.2018.8507572
Y. Machida, Akihisa Goto, A. Takahashi, S. Funabiki
The output power of photovoltaic generation (PV) systems changes with the variation in the solar irradiance and temperature of the PV panel surface. The change in output power influences the power quality of the power system. Therefore, a PV system with an electrolyzer (ELY) is proposed to prevent the degradation of the power quality. The proposed system converts the fluctuating components in the PV power fluctuations into hydrogen, which is supplied to fuel cell vehicles. To realize a stable hydrogen supply chain, it is necessary to manage the hydrogen produced by the ELY. This paper proposes a novel method for energy management of a hydrogen-storage PV system with a function of suppressing the short-period components in the PV power. It is verified that the proposed energy management method is effective for reducing the fluctuations of the PV power and the establishment of a hydrogen supply chain.
{"title":"Energy Management of Hydrogen-Storage Photovoltaic Generation System with a Function of Suppressing Short-Period Components","authors":"Y. Machida, Akihisa Goto, A. Takahashi, S. Funabiki","doi":"10.23919/IPEC.2018.8507572","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8507572","url":null,"abstract":"The output power of photovoltaic generation (PV) systems changes with the variation in the solar irradiance and temperature of the PV panel surface. The change in output power influences the power quality of the power system. Therefore, a PV system with an electrolyzer (ELY) is proposed to prevent the degradation of the power quality. The proposed system converts the fluctuating components in the PV power fluctuations into hydrogen, which is supplied to fuel cell vehicles. To realize a stable hydrogen supply chain, it is necessary to manage the hydrogen produced by the ELY. This paper proposes a novel method for energy management of a hydrogen-storage PV system with a function of suppressing the short-period components in the PV power. It is verified that the proposed energy management method is effective for reducing the fluctuations of the PV power and the establishment of a hydrogen supply chain.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"62 1","pages":"2449-2455"},"PeriodicalIF":0.0,"publicationDate":"2018-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88021992","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 : 2018-10-22DOI: 10.23919/IPEC.2018.8508025
Katsuhiro Hata, Kensuke Hanajiri, T. Imura, H. Fujimoto, Y. Hori, Motoki Sato, D. Gunji
In-motion wireless power transfer (WPT) has the capability to drastically increase a cruising distance of electric vehicles (EVs). A vehicle detection technique is important for a road facility to reduce standby power consumption and to prevent an unnecessary magnetic field leakage. A sensorless vehicle detection method using voltage pulses has been proposed and fundamental experiments have been demonstrated with small-scale equipment. In this paper, a full-scale in-motion WPT system is implemented and a test vehicle is developed with the second generation wireless in-wheel motor (W-IWM2). The sensorless vehicle detection method is applied to the implemented in-motion WPT system and the feasibility of the proposed system is verified by the driving experiment with the test vehicle.
{"title":"Driving Test Evaluation of Sensorless Vehicle Detection Method for In-motion Wireless Power Transfer","authors":"Katsuhiro Hata, Kensuke Hanajiri, T. Imura, H. Fujimoto, Y. Hori, Motoki Sato, D. Gunji","doi":"10.23919/IPEC.2018.8508025","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8508025","url":null,"abstract":"In-motion wireless power transfer (WPT) has the capability to drastically increase a cruising distance of electric vehicles (EVs). A vehicle detection technique is important for a road facility to reduce standby power consumption and to prevent an unnecessary magnetic field leakage. A sensorless vehicle detection method using voltage pulses has been proposed and fundamental experiments have been demonstrated with small-scale equipment. In this paper, a full-scale in-motion WPT system is implemented and a test vehicle is developed with the second generation wireless in-wheel motor (W-IWM2). The sensorless vehicle detection method is applied to the implemented in-motion WPT system and the feasibility of the proposed system is verified by the driving experiment with the test vehicle.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"23 1","pages":"663-668"},"PeriodicalIF":0.0,"publicationDate":"2018-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78632271","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 : 2018-10-22DOI: 10.23919/IPEC.2018.8507657
Y. Zhang, M. Roes, M. Hendrix, J. Duarte
In this paper an add-on control method is proposed to damp oscillations in the LCL filter of a grid-connected converter. An observer is used to estimate the capacitor current, and successively, a conventional active damping technique is applied. Since the capacitor current is estimated from already available measurements, the proposed active damping method does not need an extra current sensor for the capacitor current. Model analysis and simulation validate the effectiveness of the proposed control method.
{"title":"Observer-based active damping for grid-connected converters with LCL filter","authors":"Y. Zhang, M. Roes, M. Hendrix, J. Duarte","doi":"10.23919/IPEC.2018.8507657","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8507657","url":null,"abstract":"In this paper an add-on control method is proposed to damp oscillations in the LCL filter of a grid-connected converter. An observer is used to estimate the capacitor current, and successively, a conventional active damping technique is applied. Since the capacitor current is estimated from already available measurements, the proposed active damping method does not need an extra current sensor for the capacitor current. Model analysis and simulation validate the effectiveness of the proposed control method.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"18 1","pages":"2697-2702"},"PeriodicalIF":0.0,"publicationDate":"2018-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77182802","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 : 2018-10-22DOI: 10.23919/IPEC.2018.8507924
Zhan Shen, Yanfeng Shen, Zian Qin, Huai Wang
The transformer in the dual active bridge converter (DAB) is the key element which provides galvanic insulation and voltage conversion. The parasitic parameters, including winding capacitance, ac resistance, and leakage inductance, are the primary considerations in its winding design. Without proper consideration of those parameters could result in issues on current ringing, high power loss, and overheating. In this paper, a comprehensive study is devoted to those parameters. A winding design method is presented by taking all those parameters into consideration. Special attention is paid to the impact of displacement winding, which is quite often in the manufacture and especially in prototype design phase. Both the normal and displacement winding will be studied and compared, with analytical, simulation, and experimental methods. Through comparison, additional coefficients are introduced to the simple analytical equations so that they could also be applied for displacement windings. Several considerations are given to control those parameters within a reasonable range in the design and manufacture phase. Finally, the analysis and design method are verified by finite element method and the experimental results on a 120 kHz prototype, and can be extended to other high-frequency magnetic designs.
{"title":"Modeling and Optimization of Displacement Windings for Transformers in Dual Active Bridge Converters","authors":"Zhan Shen, Yanfeng Shen, Zian Qin, Huai Wang","doi":"10.23919/IPEC.2018.8507924","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8507924","url":null,"abstract":"The transformer in the dual active bridge converter (DAB) is the key element which provides galvanic insulation and voltage conversion. The parasitic parameters, including winding capacitance, ac resistance, and leakage inductance, are the primary considerations in its winding design. Without proper consideration of those parameters could result in issues on current ringing, high power loss, and overheating. In this paper, a comprehensive study is devoted to those parameters. A winding design method is presented by taking all those parameters into consideration. Special attention is paid to the impact of displacement winding, which is quite often in the manufacture and especially in prototype design phase. Both the normal and displacement winding will be studied and compared, with analytical, simulation, and experimental methods. Through comparison, additional coefficients are introduced to the simple analytical equations so that they could also be applied for displacement windings. Several considerations are given to control those parameters within a reasonable range in the design and manufacture phase. Finally, the analysis and design method are verified by finite element method and the experimental results on a 120 kHz prototype, and can be extended to other high-frequency magnetic designs.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"51 1","pages":"1925-1930"},"PeriodicalIF":0.0,"publicationDate":"2018-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90421206","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 : 2018-10-22DOI: 10.23919/IPEC.2018.8507806
N. Ha Pham, Tomoyuki Mannen, K. Wada
This paper proposes a three-phase grid connected solar inverter with integrated boost function. The circuit operating principle is based on current unfolding and injection method, which is similar to that of a SWISS rectifier. This approach requires only two high frequency switches operating at only half voltage stress, thus leading to a significant reduction in switching losses. Other switches only operate at line frequency, and therefore can be optimized to reduce conduction losses. The proposed inverter therefore can deliver high efficiency. This paper discusses the basic operating principle as well as control method for the inverter. It is revealed that the output currents of the proposed inverter contains intrinsic oscillation due to current unfolding operation. In order to solve this problem, an active damping method is proposed to stabilize the operation. As a result, stable operation of the proposed method is confirmed by simulation. The feasibility of the proposed inverter is also confirmed using a mini laboratory prototype.
{"title":"Boost Integrated Three-Phase Solar Inverter using Current Unfolding and Active Damping Methods","authors":"N. Ha Pham, Tomoyuki Mannen, K. Wada","doi":"10.23919/IPEC.2018.8507806","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8507806","url":null,"abstract":"This paper proposes a three-phase grid connected solar inverter with integrated boost function. The circuit operating principle is based on current unfolding and injection method, which is similar to that of a SWISS rectifier. This approach requires only two high frequency switches operating at only half voltage stress, thus leading to a significant reduction in switching losses. Other switches only operate at line frequency, and therefore can be optimized to reduce conduction losses. The proposed inverter therefore can deliver high efficiency. This paper discusses the basic operating principle as well as control method for the inverter. It is revealed that the output currents of the proposed inverter contains intrinsic oscillation due to current unfolding operation. In order to solve this problem, an active damping method is proposed to stabilize the operation. As a result, stable operation of the proposed method is confirmed by simulation. The feasibility of the proposed inverter is also confirmed using a mini laboratory prototype.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"11 1","pages":"1414-1420"},"PeriodicalIF":0.0,"publicationDate":"2018-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88518346","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 : 2018-10-22DOI: 10.23919/IPEC.2018.8507771
Jia-You Lee, I-Lin Chen, Chien-Tzu Ko
The paper aims to develop a dual-slot type power-pickup suitable for the inductive power track system for contactless power transmission. A new strip type inductive power track with high magnetic flux density and magnetic field uniformity is proposed. By means of equivalent magnetic circuit model analysis, a dual-slot type power-pickup with high magnetic flux linkage is designed to improve the power transmission capacity and efficiency. To verify the contactless transmission characteristics of the proposed strip type inductive power track system, an inductive power track with 1.2 m long is constructed. The SPLSC topology is chosen as the compound resonant circuit of a full bridge inverter. In accordance with the experimental results, the maximum output power of overall system is 775 W with transfer efficiency of 64.58%, and the maximum transmission efficiency is 72.52% at an output power of 289.52 W.
{"title":"Dual-Slot Power-Pickup Structure for Contactless Strip Inductive Power Track System","authors":"Jia-You Lee, I-Lin Chen, Chien-Tzu Ko","doi":"10.23919/IPEC.2018.8507771","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8507771","url":null,"abstract":"The paper aims to develop a dual-slot type power-pickup suitable for the inductive power track system for contactless power transmission. A new strip type inductive power track with high magnetic flux density and magnetic field uniformity is proposed. By means of equivalent magnetic circuit model analysis, a dual-slot type power-pickup with high magnetic flux linkage is designed to improve the power transmission capacity and efficiency. To verify the contactless transmission characteristics of the proposed strip type inductive power track system, an inductive power track with 1.2 m long is constructed. The SPLSC topology is chosen as the compound resonant circuit of a full bridge inverter. In accordance with the experimental results, the maximum output power of overall system is 775 W with transfer efficiency of 64.58%, and the maximum transmission efficiency is 72.52% at an output power of 289.52 W.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"3 1","pages":"2107-2112"},"PeriodicalIF":0.0,"publicationDate":"2018-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87793454","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 : 2018-10-22DOI: 10.23919/IPEC.2018.8507408
Yi Zhang, Huai Wang, Zhongxu Wang, Yongheng Yang, F. Blaabjerg
The reliability of the Modular Multilevel Converter (MMC) is of great interest in industrial applications, where the dominant failure mechanism of IGBT modules in an MMC system is temperature-related. In this regard, thermal modeling is critical to map the power losses to thermal profiles and then to predict the lifetime. Even though the Thermal Interface Materials (TIMs) in IGBT modules have a considerable influence on the thermal resistance, the thickness of TIMs is often spuriously considered as a constant according to the thermal conductivity or information in the datasheet. This may lead to misleading results in the lifetime prediction. Hence, this paper investigates the impact of the TIM thickness on the estimated lifetime of IGBT modules in an MMC system for offshore wind power applications, including the starting assembly thickness and the Bond-Line Thickness (BLT) of TIMs. In a 30-MW MMC case study, the lifetime of the IGBT modules is discussed with respect to two values of starting thickness and variable BLT from 20 µm to 60 µm. Experiments are also carried out on a scaled-down system to validate the impact of the TIM thicknesses on the reliability prediction.
{"title":"Impact of the Thermal-Interface-Material Thickness on IGBT Module Reliability in the Modular Multilevel Converter","authors":"Yi Zhang, Huai Wang, Zhongxu Wang, Yongheng Yang, F. Blaabjerg","doi":"10.23919/IPEC.2018.8507408","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8507408","url":null,"abstract":"The reliability of the Modular Multilevel Converter (MMC) is of great interest in industrial applications, where the dominant failure mechanism of IGBT modules in an MMC system is temperature-related. In this regard, thermal modeling is critical to map the power losses to thermal profiles and then to predict the lifetime. Even though the Thermal Interface Materials (TIMs) in IGBT modules have a considerable influence on the thermal resistance, the thickness of TIMs is often spuriously considered as a constant according to the thermal conductivity or information in the datasheet. This may lead to misleading results in the lifetime prediction. Hence, this paper investigates the impact of the TIM thickness on the estimated lifetime of IGBT modules in an MMC system for offshore wind power applications, including the starting assembly thickness and the Bond-Line Thickness (BLT) of TIMs. In a 30-MW MMC case study, the lifetime of the IGBT modules is discussed with respect to two values of starting thickness and variable BLT from 20 µm to 60 µm. Experiments are also carried out on a scaled-down system to validate the impact of the TIM thicknesses on the reliability prediction.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"17 1","pages":"2743-2749"},"PeriodicalIF":0.0,"publicationDate":"2018-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85896355","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 : 2018-10-22DOI: 10.23919/IPEC.2018.8508020
Y. Miyama, H. Kometani, K. Akatsu
This work investigates a method to reduce the carrier harmonic current and the carrier harmonic losses of a permanent-magnet synchronous motor (PMSM) with dual three-phase windings. The motor input impedance of the carrier harmonics is increased to reduce the carrier harmonic current by reinforcing the carrier harmonic gap flux density of the dual three-phase windings. Our study is carried out based on a theoretical approach by calculating the gap flux density, including the space, time, and carrier harmonics. The result of our theoretical approach is confirmed by finite element analysis (FEA) based on a 12-slot, 10-pole phase-shift winding dual three-phase PMSM. The measured result of our manufactured motor also reveals that the target harmonic current was reduced by applying our proposed technique.
{"title":"Carrier Harmonic Loss Reduction Technique on Dual Three-Phase Permanent-Magnet Synchronous Motors with Phase-Shift PWM","authors":"Y. Miyama, H. Kometani, K. Akatsu","doi":"10.23919/IPEC.2018.8508020","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8508020","url":null,"abstract":"This work investigates a method to reduce the carrier harmonic current and the carrier harmonic losses of a permanent-magnet synchronous motor (PMSM) with dual three-phase windings. The motor input impedance of the carrier harmonics is increased to reduce the carrier harmonic current by reinforcing the carrier harmonic gap flux density of the dual three-phase windings. Our study is carried out based on a theoretical approach by calculating the gap flux density, including the space, time, and carrier harmonics. The result of our theoretical approach is confirmed by finite element analysis (FEA) based on a 12-slot, 10-pole phase-shift winding dual three-phase PMSM. The measured result of our manufactured motor also reveals that the target harmonic current was reduced by applying our proposed technique.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"4 1","pages":"711-717"},"PeriodicalIF":0.0,"publicationDate":"2018-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86580901","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 : 2018-10-22DOI: 10.23919/IPEC.2018.8507519
D. Yamaguchi, H. Fujita
This paper proposes a grid-connection control method of the previously-proposed PV converter using a symmetrically-connected boost converter. The proposed circuit has an advantage in its switching operation since the symmetrically connected boost converter and the inverter can alternately stop switching, reducing the switching power losses. In the proposed grid-connection control method, the boost converter performs feedback control of the dc link voltage to make the grid current sinusoidal during the switching interval in the inverter. This paper theoretically clarifies the operating principle of the proposed grid-connection control method and confirms its operating performance using a 8-kW experimental system. As a result, the proposed grid-connection control method makes it possible to control the grid current as a sinusoidal waveform.
{"title":"Experimental Verification of Grid-Connection of a PV Converter Using a Symmetrically Connected Boost Converter for a High-Leg Delta Transformer","authors":"D. Yamaguchi, H. Fujita","doi":"10.23919/IPEC.2018.8507519","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8507519","url":null,"abstract":"This paper proposes a grid-connection control method of the previously-proposed PV converter using a symmetrically-connected boost converter. The proposed circuit has an advantage in its switching operation since the symmetrically connected boost converter and the inverter can alternately stop switching, reducing the switching power losses. In the proposed grid-connection control method, the boost converter performs feedback control of the dc link voltage to make the grid current sinusoidal during the switching interval in the inverter. This paper theoretically clarifies the operating principle of the proposed grid-connection control method and confirms its operating performance using a 8-kW experimental system. As a result, the proposed grid-connection control method makes it possible to control the grid current as a sinusoidal waveform.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"25 1","pages":"3940-3944"},"PeriodicalIF":0.0,"publicationDate":"2018-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85230870","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 : 2018-10-22DOI: 10.23919/IPEC.2018.8507692
Ta-Wei Huang, Wei-Jing Tseng, Jun-Xian Huang
Individual LED dimming control is required for RGB light mixing applications by controlling LED currents independently with multiple-output LED drivers. In this thesis, a single-inductor multiple-output dimmable LED driver with buck converter is designed. According to the overall output power and input voltage conditions, the buck converter with the primary-side control can be operated in QR mode, frequency limitation and frequency reduction mode. The varied frequency controlled signal method is proposed to control the dimming sequence and the conducting times of the RGB LED strings. Finally, the buck-type SIMO LED driver with the universal input voltages 90 - 264 Vrms to drive Red (25 V/0.2 A), Green (40 V/0.2 A) and Blue (40.5 V/0.2 A) LED lamps is implemented. The dimming range is from 5 % to 100 % individually. The highest error of the dimming is 10% and the highest efficiency is 94%.
{"title":"Single-Inductor Multiple-Outputs Dimmable LED Driver with Buck Converter","authors":"Ta-Wei Huang, Wei-Jing Tseng, Jun-Xian Huang","doi":"10.23919/IPEC.2018.8507692","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8507692","url":null,"abstract":"Individual LED dimming control is required for RGB light mixing applications by controlling LED currents independently with multiple-output LED drivers. In this thesis, a single-inductor multiple-output dimmable LED driver with buck converter is designed. According to the overall output power and input voltage conditions, the buck converter with the primary-side control can be operated in QR mode, frequency limitation and frequency reduction mode. The varied frequency controlled signal method is proposed to control the dimming sequence and the conducting times of the RGB LED strings. Finally, the buck-type SIMO LED driver with the universal input voltages 90 - 264 Vrms to drive Red (25 V/0.2 A), Green (40 V/0.2 A) and Blue (40.5 V/0.2 A) LED lamps is implemented. The dimming range is from 5 % to 100 % individually. The highest error of the dimming is 10% and the highest efficiency is 94%.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"1 1","pages":"1626-1633"},"PeriodicalIF":0.0,"publicationDate":"2018-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84230765","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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