Pub Date : 2010-06-21DOI: 10.1109/IPEC.2010.5543657
Doo-yong Jung, Young-Hyok Ji, Jun-Ho Kim, C. Won, Yong-Chae Jung
In this paper, a soft switching interleaved boost converter for photovoltaic power generation system is proposed. It is a topology, which raises efficiency for DC-DC converter of photovoltaic PCS(Power Conditioning System). And it minimizes switching losses, input current ripple and output voltage ripple by adopting soft switching method using resonance. The detailed mode analysis of proposed topology is presented. The feasibility of proposed topology is experimentally verified on a 3.3 [kW] prototype.
{"title":"Ripple analysis of interleaved soft switching boost converter for photovoltaic applications","authors":"Doo-yong Jung, Young-Hyok Ji, Jun-Ho Kim, C. Won, Yong-Chae Jung","doi":"10.1109/IPEC.2010.5543657","DOIUrl":"https://doi.org/10.1109/IPEC.2010.5543657","url":null,"abstract":"In this paper, a soft switching interleaved boost converter for photovoltaic power generation system is proposed. It is a topology, which raises efficiency for DC-DC converter of photovoltaic PCS(Power Conditioning System). And it minimizes switching losses, input current ripple and output voltage ripple by adopting soft switching method using resonance. The detailed mode analysis of proposed topology is presented. The feasibility of proposed topology is experimentally verified on a 3.3 [kW] prototype.","PeriodicalId":353540,"journal":{"name":"The 2010 International Power Electronics Conference - ECCE ASIA -","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122025856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-06-21DOI: 10.1109/IPEC.2010.5543584
T. Kohama, Akio Inoue
Method for eliminating magnetic saturation in low-voltage and high-current DC-DC converter with fast dynamic response is described. The magnetic saturation is observed in onboard isolated bridge-type DC-DC converter due to inherently asymmetrical PWM signal during transient condition. The saturation is not eliminated by using ac-coupling capacitor for transformer. Mechanism of the saturation is analyzed and confirmed by experiments. Based on the analysis a solution for the magnetic saturation is proposed. The effectiveness of proposed method is also confirmed by experiments.
{"title":"Method for eliminating magnetic saturation due to fast transient response in DC-DC converter","authors":"T. Kohama, Akio Inoue","doi":"10.1109/IPEC.2010.5543584","DOIUrl":"https://doi.org/10.1109/IPEC.2010.5543584","url":null,"abstract":"Method for eliminating magnetic saturation in low-voltage and high-current DC-DC converter with fast dynamic response is described. The magnetic saturation is observed in onboard isolated bridge-type DC-DC converter due to inherently asymmetrical PWM signal during transient condition. The saturation is not eliminated by using ac-coupling capacitor for transformer. Mechanism of the saturation is analyzed and confirmed by experiments. Based on the analysis a solution for the magnetic saturation is proposed. The effectiveness of proposed method is also confirmed by experiments.","PeriodicalId":353540,"journal":{"name":"The 2010 International Power Electronics Conference - ECCE ASIA -","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124076339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-06-21DOI: 10.1109/IPEC.2010.5543857
Won-Seok Kang, S. Young, Taeyoung Ahn, Seong-Wook Chang
A latest super-junction MOSFET is applied to hard switching, high power PFC application and compared to soft switched IGBT. With reduced on-resistance and enhanced switching characteristics, the super-junction MOSFET can compete with soft switched IGBT. A 1.5kW rated CCM PFC circuit is designed and ZVS logic has implemented for performance evaluation of both configurations. Limit line of power rating is discussed through analyzing switching and conduction losses.
{"title":"Power device consideration on high power PFC pre-regulator for optimized design","authors":"Won-Seok Kang, S. Young, Taeyoung Ahn, Seong-Wook Chang","doi":"10.1109/IPEC.2010.5543857","DOIUrl":"https://doi.org/10.1109/IPEC.2010.5543857","url":null,"abstract":"A latest super-junction MOSFET is applied to hard switching, high power PFC application and compared to soft switched IGBT. With reduced on-resistance and enhanced switching characteristics, the super-junction MOSFET can compete with soft switched IGBT. A 1.5kW rated CCM PFC circuit is designed and ZVS logic has implemented for performance evaluation of both configurations. Limit line of power rating is discussed through analyzing switching and conduction losses.","PeriodicalId":353540,"journal":{"name":"The 2010 International Power Electronics Conference - ECCE ASIA -","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124085029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-06-21DOI: 10.1109/IPEC.2010.5542218
T. Ching
A transition-mode (TM) dimmable high brightness light-emitting-diode (LED) driver for general and residential illumination applications is presented. An improved pulse-width modulation dimming technique utilizing a low cost micro-controller is studied and implemented with a current-regulated LED drive. Under universal input voltage operation, high power factor and high efficiency can be achieved by a coupled inductor flyback converter, regulated by a TM power-factor-correction controller. The operation principles of the proposed LED driver will be discussed and evaluated. A laboratory prototype is also designed and tested for verification.
{"title":"Transition-mode dimmable LED driver for illumination applications","authors":"T. Ching","doi":"10.1109/IPEC.2010.5542218","DOIUrl":"https://doi.org/10.1109/IPEC.2010.5542218","url":null,"abstract":"A transition-mode (TM) dimmable high brightness light-emitting-diode (LED) driver for general and residential illumination applications is presented. An improved pulse-width modulation dimming technique utilizing a low cost micro-controller is studied and implemented with a current-regulated LED drive. Under universal input voltage operation, high power factor and high efficiency can be achieved by a coupled inductor flyback converter, regulated by a TM power-factor-correction controller. The operation principles of the proposed LED driver will be discussed and evaluated. A laboratory prototype is also designed and tested for verification.","PeriodicalId":353540,"journal":{"name":"The 2010 International Power Electronics Conference - ECCE ASIA -","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124663345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-06-21DOI: 10.1109/IPEC.2010.5543130
Myungbok Kim
A novel two-phase interleaved LLC resonant converter is proposed, which can manage the number of phases by output loading. In the proposed scheme, the output load current is detected with sensing resistor in the output terminal. The measured value is compared with the threshold value for phase management and the signal is generated to trigger the gate driver. As a result, it is possible to improve the efficiency at a light load condition.
{"title":"Two-phase interleaved LLC resonant converter with phase shedding control","authors":"Myungbok Kim","doi":"10.1109/IPEC.2010.5543130","DOIUrl":"https://doi.org/10.1109/IPEC.2010.5543130","url":null,"abstract":"A novel two-phase interleaved LLC resonant converter is proposed, which can manage the number of phases by output loading. In the proposed scheme, the output load current is detected with sensing resistor in the output terminal. The measured value is compared with the threshold value for phase management and the signal is generated to trigger the gate driver. As a result, it is possible to improve the efficiency at a light load condition.","PeriodicalId":353540,"journal":{"name":"The 2010 International Power Electronics Conference - ECCE ASIA -","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127162273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-06-21DOI: 10.1109/IPEC.2010.5543624
Feng Zheng, Zhengfeng Ming, Xiang Zheng
This paper investigates in detail the design procedures of an integrated magnetics (IM), blended with inductor and transformer functions. Comparison between IMs and coupled inductors in current handling abilities reveals that all of the IM design task can be substituted by the implementation of proper coupled inductors. A design flow-chart for the IM design tasks is then proposed following this result. The IM used in current-doubler rectifier (CDR) circuits is chosen as a representative of such a device for a case study which demonstrates the design procedures. The problem of how to select the proper magnetic core for IMs is also addressed based on our earlier works. The particular issue for IM winding cross-sectional-area optimization is carried out. A prototype following the design flow chart is constructed to verify the design procedures.
{"title":"General design method for various integrated magnetics components in CDR","authors":"Feng Zheng, Zhengfeng Ming, Xiang Zheng","doi":"10.1109/IPEC.2010.5543624","DOIUrl":"https://doi.org/10.1109/IPEC.2010.5543624","url":null,"abstract":"This paper investigates in detail the design procedures of an integrated magnetics (IM), blended with inductor and transformer functions. Comparison between IMs and coupled inductors in current handling abilities reveals that all of the IM design task can be substituted by the implementation of proper coupled inductors. A design flow-chart for the IM design tasks is then proposed following this result. The IM used in current-doubler rectifier (CDR) circuits is chosen as a representative of such a device for a case study which demonstrates the design procedures. The problem of how to select the proper magnetic core for IMs is also addressed based on our earlier works. The particular issue for IM winding cross-sectional-area optimization is carried out. A prototype following the design flow chart is constructed to verify the design procedures.","PeriodicalId":353540,"journal":{"name":"The 2010 International Power Electronics Conference - ECCE ASIA -","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129957091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-06-21DOI: 10.1109/IPEC.2010.5544588
Ping-Min Hsu, Chun‐Liang Lin
This paper concerns the congestion control problem for local wireless sensor networks. A novel design strategy for time-delay compensation without the consideration of delay estimation is proposed. With the aid of this method, a time-varying delay can be compensated and a congestion controller combined with this compensator is designed. The approach is fully verified by the network simulator NS2.
{"title":"Congestion control for local wireless sensor network using time-delay compensator","authors":"Ping-Min Hsu, Chun‐Liang Lin","doi":"10.1109/IPEC.2010.5544588","DOIUrl":"https://doi.org/10.1109/IPEC.2010.5544588","url":null,"abstract":"This paper concerns the congestion control problem for local wireless sensor networks. A novel design strategy for time-delay compensation without the consideration of delay estimation is proposed. With the aid of this method, a time-varying delay can be compensated and a congestion controller combined with this compensator is designed. The approach is fully verified by the network simulator NS2.","PeriodicalId":353540,"journal":{"name":"The 2010 International Power Electronics Conference - ECCE ASIA -","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130096558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-06-21DOI: 10.1109/IPEC.2010.5542224
Hung-Liang Cheng, C. Moo, Chun K. Huang, Chung-Sheng. Yang
The paper presents a single-stage high-power-factor electronic ballast for metal halide lamps. The proposed ballast integrates a buck-boost converter, a buck converter and a full-bridge inverter into a single power conversion circuit. The buck-boost converter served as a power-factor corrector (PFC) is designed to operate at discontinuous conduction mode (DCM) to achieve nearly a unity power factor at the input line. By adjusting the duty-ratio of the active switches of the PFC, the lamp power is remained at rated value for universal input voltage ranged from 90 Vrms to 264 Vrms. The four active switches of the full-bridge inverter, an inductor and a capacitor form a bidirectional buck converter which supplies a low frequency square-wave current for the lamp at to avoid the lamp from happing acoustic resonance. The circuit operation is analyzed in detail to derive the design equations. A prototype electronic ballast for a 70 W metal halide lamp is built and tested. Experimental measurements are provided to verify that the proposed ballast has the merits of a nearly unity input power factor, high circuit efficiency and the metal halide lamp is free of acoustic resonance.
{"title":"Analysis and implementation of a novel single-stage low-frequency electronic ballast for HID lamps","authors":"Hung-Liang Cheng, C. Moo, Chun K. Huang, Chung-Sheng. Yang","doi":"10.1109/IPEC.2010.5542224","DOIUrl":"https://doi.org/10.1109/IPEC.2010.5542224","url":null,"abstract":"The paper presents a single-stage high-power-factor electronic ballast for metal halide lamps. The proposed ballast integrates a buck-boost converter, a buck converter and a full-bridge inverter into a single power conversion circuit. The buck-boost converter served as a power-factor corrector (PFC) is designed to operate at discontinuous conduction mode (DCM) to achieve nearly a unity power factor at the input line. By adjusting the duty-ratio of the active switches of the PFC, the lamp power is remained at rated value for universal input voltage ranged from 90 Vrms to 264 Vrms. The four active switches of the full-bridge inverter, an inductor and a capacitor form a bidirectional buck converter which supplies a low frequency square-wave current for the lamp at to avoid the lamp from happing acoustic resonance. The circuit operation is analyzed in detail to derive the design equations. A prototype electronic ballast for a 70 W metal halide lamp is built and tested. Experimental measurements are provided to verify that the proposed ballast has the merits of a nearly unity input power factor, high circuit efficiency and the metal halide lamp is free of acoustic resonance.","PeriodicalId":353540,"journal":{"name":"The 2010 International Power Electronics Conference - ECCE ASIA -","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131029289","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-06-21DOI: 10.1109/IPEC.2010.5542248
C. Hua, Hsi-Chin Chiang
This paper presents that a detailed steady-state and small-signal analysis of a modified Sheppard-Taylor converter using an average mode is designed for PEM fuel cell applications. Thus, a small-signal average model has all been obtained. According to the analysis above, transfer functions between duty cycle and output voltage and between input and output voltages have been also obtained, so some simplifications and design rules have been proposed to facilitate the design of the feedback loop. Simulink results are given to show the overall system performance.
{"title":"A modified Sheppard-Taylor converter suitable for PEM fuel cell","authors":"C. Hua, Hsi-Chin Chiang","doi":"10.1109/IPEC.2010.5542248","DOIUrl":"https://doi.org/10.1109/IPEC.2010.5542248","url":null,"abstract":"This paper presents that a detailed steady-state and small-signal analysis of a modified Sheppard-Taylor converter using an average mode is designed for PEM fuel cell applications. Thus, a small-signal average model has all been obtained. According to the analysis above, transfer functions between duty cycle and output voltage and between input and output voltages have been also obtained, so some simplifications and design rules have been proposed to facilitate the design of the feedback loop. Simulink results are given to show the overall system performance.","PeriodicalId":353540,"journal":{"name":"The 2010 International Power Electronics Conference - ECCE ASIA -","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123737093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2010-06-21DOI: 10.1109/IPEC.2010.5543348
M. Tsai, Dan Y. Chen, Ching-Jan Chen, Chen-Hua Chiu, Wei-Hsu Chang
A current-balancing loop is often used in a voltage-mode multiphase interleaved voltage regulator (VR). It serves not only to balance the phase current but also to suppress the beat-frequency phase current oscillation in driving high-frequency dynamic loads such as recent central processing units (CPUs). In this paper, models were developed to predict the control characteristics of both the functions mentioned above. Two loop gain expressions were developed, one from the perspective of current balancing and the other from the perspective of suppressing beat-frequency oscillation. Based on the modeling results, a design guideline for current-loop compensation was proposed for balancing phase current and suppressing beat-frequency oscillation.
{"title":"Modeling and design of current balancing control in voltage-mode multiphase interleaved voltage regulators","authors":"M. Tsai, Dan Y. Chen, Ching-Jan Chen, Chen-Hua Chiu, Wei-Hsu Chang","doi":"10.1109/IPEC.2010.5543348","DOIUrl":"https://doi.org/10.1109/IPEC.2010.5543348","url":null,"abstract":"A current-balancing loop is often used in a voltage-mode multiphase interleaved voltage regulator (VR). It serves not only to balance the phase current but also to suppress the beat-frequency phase current oscillation in driving high-frequency dynamic loads such as recent central processing units (CPUs). In this paper, models were developed to predict the control characteristics of both the functions mentioned above. Two loop gain expressions were developed, one from the perspective of current balancing and the other from the perspective of suppressing beat-frequency oscillation. Based on the modeling results, a design guideline for current-loop compensation was proposed for balancing phase current and suppressing beat-frequency oscillation.","PeriodicalId":353540,"journal":{"name":"The 2010 International Power Electronics Conference - ECCE ASIA -","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130539430","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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