Pub Date : 2013-03-17DOI: 10.1109/APEC.2013.6520771
A. Ravindranath, O. Ray, S. Mishra, A. Joshi
Switched Boost Inverter (SBI) is a single stage power converter that can generate a dc output and an ac output simultaneously from a single dc input voltage source. Unlike the traditional buck type Voltage Source Inverter (VSI), the SBI can produce an AC output voltage that is either greater or less than the available DC input voltage. Other advantages of SBI when compared to the VSI include (a) tolerance to shoot-through in the inverter phase legs, (b) robust EMI noise immunity, and (c) no dead-time requirement. These features make the SBI suitable for stand-alone and utility connected residential power applications supplied from renewable energy sources such as solar panel or fuel cell. This paper presents the DSP based closed loop control of a single phase utility connected SBI supplying a 250 W DC load while injecting 250 W active power into the grid at unity power factor. The grid synchronization of SBI is achieved using a Second Order Generalized Integrator (SOGI) based Phase Locked Loop (PLL) and the grid current regulation is done using Synchronous Reference Frame (SRF) approach. The closed loop control strategy has been implemented in digital domain using TMS320F28335 Digital Signal Processor (DSP). The DSP based closed loop control strategy is also verified using a 500 W experimental prototype of single phase utility connected SBI. The experimental results presented in the paper show good correlation with the theoretical analysis.
{"title":"Single phase utility interactive Switched Boost Inverter for renewable energy based residential power applications","authors":"A. Ravindranath, O. Ray, S. Mishra, A. Joshi","doi":"10.1109/APEC.2013.6520771","DOIUrl":"https://doi.org/10.1109/APEC.2013.6520771","url":null,"abstract":"Switched Boost Inverter (SBI) is a single stage power converter that can generate a dc output and an ac output simultaneously from a single dc input voltage source. Unlike the traditional buck type Voltage Source Inverter (VSI), the SBI can produce an AC output voltage that is either greater or less than the available DC input voltage. Other advantages of SBI when compared to the VSI include (a) tolerance to shoot-through in the inverter phase legs, (b) robust EMI noise immunity, and (c) no dead-time requirement. These features make the SBI suitable for stand-alone and utility connected residential power applications supplied from renewable energy sources such as solar panel or fuel cell. This paper presents the DSP based closed loop control of a single phase utility connected SBI supplying a 250 W DC load while injecting 250 W active power into the grid at unity power factor. The grid synchronization of SBI is achieved using a Second Order Generalized Integrator (SOGI) based Phase Locked Loop (PLL) and the grid current regulation is done using Synchronous Reference Frame (SRF) approach. The closed loop control strategy has been implemented in digital domain using TMS320F28335 Digital Signal Processor (DSP). The DSP based closed loop control strategy is also verified using a 500 W experimental prototype of single phase utility connected SBI. The experimental results presented in the paper show good correlation with the theoretical analysis.","PeriodicalId":256756,"journal":{"name":"2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130729183","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 : 2013-03-17DOI: 10.1109/APEC.2013.6520603
H. Krishnamoorthy, D. Rana, P. Enjeti
In this paper, a new medium-voltage (MV) wind turbine generator (WTG) - energy storage grid interface converter topology with medium-frequency (MF) link transformer isolation is introduced. The system forms a 3-port network in which several series stacked AC-AC converters transform the low-frequency (50/60 Hz) utility MV into MF (0.4 to 2 kHz) AC voltage by modulating it with MF square wave. This voltage is then fed to the MF transformer primary windings. The secondary and tertiary windings interface with the WTG side and the battery energy storage side respectively after power conversion. The power generated by WTG is transferred to the MF transformer secondary windings through a 3-phase PWM rectifier and a 3-phase PWM inverter, whereas the power transfer between the energy storage and the tertiary winding occurs through a 3-phase PWM inverter. It is shown that the utility grid sinusoidal currents, the battery current and the WTG output currents can be controlled to be of good quality using PI and DQ control strategies. Thus, the proposed MF transformer based 3-port topology results in smaller converter weight/volume. Moreover, the control can effectively handle voltage sags/swells and provide low voltage ride through (LVRT) capability without significant change in the topology. Simulation waveforms along with preliminary experimental results are discussed in this paper.
{"title":"A new wind turbine generator / battery energy storage utility interface converter topology with medium-frequency transformer","authors":"H. Krishnamoorthy, D. Rana, P. Enjeti","doi":"10.1109/APEC.2013.6520603","DOIUrl":"https://doi.org/10.1109/APEC.2013.6520603","url":null,"abstract":"In this paper, a new medium-voltage (MV) wind turbine generator (WTG) - energy storage grid interface converter topology with medium-frequency (MF) link transformer isolation is introduced. The system forms a 3-port network in which several series stacked AC-AC converters transform the low-frequency (50/60 Hz) utility MV into MF (0.4 to 2 kHz) AC voltage by modulating it with MF square wave. This voltage is then fed to the MF transformer primary windings. The secondary and tertiary windings interface with the WTG side and the battery energy storage side respectively after power conversion. The power generated by WTG is transferred to the MF transformer secondary windings through a 3-phase PWM rectifier and a 3-phase PWM inverter, whereas the power transfer between the energy storage and the tertiary winding occurs through a 3-phase PWM inverter. It is shown that the utility grid sinusoidal currents, the battery current and the WTG output currents can be controlled to be of good quality using PI and DQ control strategies. Thus, the proposed MF transformer based 3-port topology results in smaller converter weight/volume. Moreover, the control can effectively handle voltage sags/swells and provide low voltage ride through (LVRT) capability without significant change in the topology. Simulation waveforms along with preliminary experimental results are discussed in this paper.","PeriodicalId":256756,"journal":{"name":"2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130992122","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 : 2013-03-17DOI: 10.1109/APEC.2013.6520773
Yuanjun Zhang, Chen Hu, Xinke Wu
By utilizing the charge balance in one capacitor, the current in two LED strings can be balanced in the LLCC resonant converter [1]. In order to balance four LED strings, a new LLCC resonant converter with two secondary side windings in main transformer, two secondary resonant capacitors in and an additional current sharing transformer (CST) is proposed. Each secondary resonant capacitor can balance the currents in one pair of outputs. And it bears the DC output voltage difference between two outputs of each pair. Meanwhile, the CST is used to balance currents of two pairs. The circuit operation principle, steady state characteristic and design considerations are discussed. A prototype of 140W four-channel LED driver is built to verify the proposed current sharing circuit.
{"title":"Analysis and design of LLCC resonant four-channel DC-DC LED driver with current sharing transformer","authors":"Yuanjun Zhang, Chen Hu, Xinke Wu","doi":"10.1109/APEC.2013.6520773","DOIUrl":"https://doi.org/10.1109/APEC.2013.6520773","url":null,"abstract":"By utilizing the charge balance in one capacitor, the current in two LED strings can be balanced in the LLCC resonant converter [1]. In order to balance four LED strings, a new LLCC resonant converter with two secondary side windings in main transformer, two secondary resonant capacitors in and an additional current sharing transformer (CST) is proposed. Each secondary resonant capacitor can balance the currents in one pair of outputs. And it bears the DC output voltage difference between two outputs of each pair. Meanwhile, the CST is used to balance currents of two pairs. The circuit operation principle, steady state characteristic and design considerations are discussed. A prototype of 140W four-channel LED driver is built to verify the proposed current sharing circuit.","PeriodicalId":256756,"journal":{"name":"2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132907822","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 : 2013-03-17DOI: 10.1109/APEC.2013.6520480
H. Keyhani, H. Toliyat
This paper introduces soft-switched high-frequency ac-link dc-dc converters. An ac inductor and a small ac capacitor form the parallel high-frequency ac link. The link inductor is the main element for transferring power, and the link capacitor creates partial resonances to obtain zero-voltage turn-on and turn-off for the converter's switches. Both link inductor and capacitor handle ac voltages and currents with low reactive ratings, so they are considerably small and efficient. Moreover, the converters have the ability to make the step-up and step-down operations by using two reverse-blocking switches for unidirectional power flow and two bidirectional switches for bidirectional operation. The converters' link frequency varies slightly by changing the input voltage and load current. The basic operation of the resonant converters includes four modes, which are described in detail. The comprehensive analysis of the proposed topologies is carried out as well. Various simulation and experimental results are provided to verify the performance of the proposed power converters.
{"title":"A new generation of buck-boost resonant AC-link DC-DC converters","authors":"H. Keyhani, H. Toliyat","doi":"10.1109/APEC.2013.6520480","DOIUrl":"https://doi.org/10.1109/APEC.2013.6520480","url":null,"abstract":"This paper introduces soft-switched high-frequency ac-link dc-dc converters. An ac inductor and a small ac capacitor form the parallel high-frequency ac link. The link inductor is the main element for transferring power, and the link capacitor creates partial resonances to obtain zero-voltage turn-on and turn-off for the converter's switches. Both link inductor and capacitor handle ac voltages and currents with low reactive ratings, so they are considerably small and efficient. Moreover, the converters have the ability to make the step-up and step-down operations by using two reverse-blocking switches for unidirectional power flow and two bidirectional switches for bidirectional operation. The converters' link frequency varies slightly by changing the input voltage and load current. The basic operation of the resonant converters includes four modes, which are described in detail. The comprehensive analysis of the proposed topologies is carried out as well. Various simulation and experimental results are provided to verify the performance of the proposed power converters.","PeriodicalId":256756,"journal":{"name":"2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133419218","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 : 2013-03-17DOI: 10.1109/APEC.2013.6520222
A. H. Chang, S. Leeb
Switched-capacitor (SC) techniques have been proposed for energy buffering applications between DC and AC grids. These techniques have been implemented using film or ceramic capacitors and have been shown to achieve high energy utilization and comparable effective energy density to electrolytic capacitors. Practical applications require control schemes capable of handling transients. This paper takes a comprehensive view of the SC energy buffer design space and examines tradeoffs regarding circuit topology, switching configuration, and control complexity. A two-step control methodology that mitigates undesirable transient responses is proposed.
{"title":"Improved transient response control strategy and design considerations for switched-capacitor (SC) energy buffer architectures","authors":"A. H. Chang, S. Leeb","doi":"10.1109/APEC.2013.6520222","DOIUrl":"https://doi.org/10.1109/APEC.2013.6520222","url":null,"abstract":"Switched-capacitor (SC) techniques have been proposed for energy buffering applications between DC and AC grids. These techniques have been implemented using film or ceramic capacitors and have been shown to achieve high energy utilization and comparable effective energy density to electrolytic capacitors. Practical applications require control schemes capable of handling transients. This paper takes a comprehensive view of the SC energy buffer design space and examines tradeoffs regarding circuit topology, switching configuration, and control complexity. A two-step control methodology that mitigates undesirable transient responses is proposed.","PeriodicalId":256756,"journal":{"name":"2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"331 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133464320","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 : 2013-03-17DOI: 10.1109/APEC.2013.6520577
Jing Wang, B. Lu
Synchronous rectifier (SR) is widely used in LLC resonant converter to reduce the conduction loss. Due to different operation modes, the SR control is complicated and increases system cost. In this paper, based on the observation on LLC diode conduction time, an open-loop fixed-on-time SR driving method is proposed. The optimal on-time is used to control the SR to simplify the implementation in different operation mode and reduce the system cost while maintains large efficiency improvement. The total efficiency of LLC resonant converter with SR driven by the proposed scheme is proved to increase by 2% under different load conditions with minimum system cost.
{"title":"Open loop synchronous rectifier driver for LLC resonant converter","authors":"Jing Wang, B. Lu","doi":"10.1109/APEC.2013.6520577","DOIUrl":"https://doi.org/10.1109/APEC.2013.6520577","url":null,"abstract":"Synchronous rectifier (SR) is widely used in LLC resonant converter to reduce the conduction loss. Due to different operation modes, the SR control is complicated and increases system cost. In this paper, based on the observation on LLC diode conduction time, an open-loop fixed-on-time SR driving method is proposed. The optimal on-time is used to control the SR to simplify the implementation in different operation mode and reduce the system cost while maintains large efficiency improvement. The total efficiency of LLC resonant converter with SR driven by the proposed scheme is proved to increase by 2% under different load conditions with minimum system cost.","PeriodicalId":256756,"journal":{"name":"2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132162393","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 : 2013-03-17DOI: 10.1109/APEC.2013.6520705
Z. Johnson, N. McFowland, L. Muller, K. Peterson, J. Jensby, J. Kimball
A new approach to photovoltaic (PV) arrays is proposed based on a parallel connection scheme. In a series-connected array, differing insolation due to shading or obstructions causes disproportionate reduction in power output. Because operating voltage is governed more by temperature than by insolation, a parallel-connected array is much more robust to the shading effect. Direct paralleling is inappropriate due to the low voltage of a conventional PV module. Therefore, high-gain dc-dc converters are introduced in the proposed system. Three converter types are discussed. Two use transformers to increase gain and one uses a tapped inductor. Experimental results validate the concept and demonstrate tracking accuracy up to 99.87% despite a 39% difference in insolation, and weighted efficiency of up to 92.9%.
{"title":"High-gain DC-DC conversion for parallel photovoltaic arrays","authors":"Z. Johnson, N. McFowland, L. Muller, K. Peterson, J. Jensby, J. Kimball","doi":"10.1109/APEC.2013.6520705","DOIUrl":"https://doi.org/10.1109/APEC.2013.6520705","url":null,"abstract":"A new approach to photovoltaic (PV) arrays is proposed based on a parallel connection scheme. In a series-connected array, differing insolation due to shading or obstructions causes disproportionate reduction in power output. Because operating voltage is governed more by temperature than by insolation, a parallel-connected array is much more robust to the shading effect. Direct paralleling is inappropriate due to the low voltage of a conventional PV module. Therefore, high-gain dc-dc converters are introduced in the proposed system. Three converter types are discussed. Two use transformers to increase gain and one uses a tapped inductor. Experimental results validate the concept and demonstrate tracking accuracy up to 99.87% despite a 39% difference in insolation, and weighted efficiency of up to 92.9%.","PeriodicalId":256756,"journal":{"name":"2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"44 21","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132737923","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 : 2013-03-17DOI: 10.1109/APEC.2013.6520279
D. Reusch, J. Strydom
The introduction of enhancement mode gallium nitride based power devices such as the eGaN®FET offers the potential to achieve higher efficiencies and higher switching frequencies than possible with Silicon MOSFETs. With the improvements in switching performance and low parasitic packaging provided by eGaN FETs, the PCB layout becomes critical to converter performance. This paper will study the effect of PCB layout parasitic inductance on efficiency and peak device voltage stress for an eGaN FET based point of load (POL) converter operating at a switching frequency of 1 MHz, an input voltage range of 12-28 V, an output voltage of 1.2 V, and an output current up to 20 A. This work will also compare the parasitic inductances of conventional PCB layouts and propose an improved PCB design providing a 40% decrease in parasitic inductance over the best conventional PCB design.
{"title":"Understanding the effect of PCB layout on circuit performance in a high frequency gallium nitride based point of load converter","authors":"D. Reusch, J. Strydom","doi":"10.1109/APEC.2013.6520279","DOIUrl":"https://doi.org/10.1109/APEC.2013.6520279","url":null,"abstract":"The introduction of enhancement mode gallium nitride based power devices such as the eGaN®FET offers the potential to achieve higher efficiencies and higher switching frequencies than possible with Silicon MOSFETs. With the improvements in switching performance and low parasitic packaging provided by eGaN FETs, the PCB layout becomes critical to converter performance. This paper will study the effect of PCB layout parasitic inductance on efficiency and peak device voltage stress for an eGaN FET based point of load (POL) converter operating at a switching frequency of 1 MHz, an input voltage range of 12-28 V, an output voltage of 1.2 V, and an output current up to 20 A. This work will also compare the parasitic inductances of conventional PCB layouts and propose an improved PCB design providing a 40% decrease in parasitic inductance over the best conventional PCB design.","PeriodicalId":256756,"journal":{"name":"2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127817270","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 : 2013-03-17DOI: 10.1109/APEC.2013.6520485
Zhiyuan Hu, Ya-jie Qiu, Yanfei Liu, P. Sen
Interleaving frequency-controlled LLC resonant converters will encounter load-sharing problem due to the tolerance of the resonant components. In this paper, full-wave and half-wave switch-controlled capacitors (SCCs) are used in LLC stages to solve this problem. By using resonant capacitance as a control variable, the output current can be modulated even when all the LLC stages are synchronized at the same switching frequency. A design procedure is developed. A 600W prototype is built to verify the feasibility.
{"title":"An interleaving and load sharing method for multiphase LLC converters","authors":"Zhiyuan Hu, Ya-jie Qiu, Yanfei Liu, P. Sen","doi":"10.1109/APEC.2013.6520485","DOIUrl":"https://doi.org/10.1109/APEC.2013.6520485","url":null,"abstract":"Interleaving frequency-controlled LLC resonant converters will encounter load-sharing problem due to the tolerance of the resonant components. In this paper, full-wave and half-wave switch-controlled capacitors (SCCs) are used in LLC stages to solve this problem. By using resonant capacitance as a control variable, the output current can be modulated even when all the LLC stages are synchronized at the same switching frequency. A design procedure is developed. A 600W prototype is built to verify the feasibility.","PeriodicalId":256756,"journal":{"name":"2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127198343","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 : 2013-03-17DOI: 10.1109/APEC.2013.6520264
H. Bui-Ngoc, H. Chazal, Y. Lembeye, J. Keradec, J. Schanen
This paper presents a new μPEEC formulation that suits for modeling 2D ferrite core transformers. μPEEC method is based on the representation of magnetic materials by equivalent current densities flowing, for insulating ferrites, on the surface of the core. Firstly, the limits of available μPEEC algorithms are pointed out and improvements are achieved to overcome calculation inaccuracies linked to magnetic angular cavities (windows) dug in power electronics transformers. Secondly, the new μPEEC formulation is implemented and used to evaluate the specific inductance per turns squared (Al) of a 9kVA, 290g, 3-winding planar transformer core and results are compared to core manufacturer data. Finally, interest for power electronics engineers of having a fast and accurate computing method for designing inductors and transformers is highlighted.
{"title":"New μPEEC formulation for modeling 2D core transformer. Principles, academic and industrial applications","authors":"H. Bui-Ngoc, H. Chazal, Y. Lembeye, J. Keradec, J. Schanen","doi":"10.1109/APEC.2013.6520264","DOIUrl":"https://doi.org/10.1109/APEC.2013.6520264","url":null,"abstract":"This paper presents a new μPEEC formulation that suits for modeling 2D ferrite core transformers. μPEEC method is based on the representation of magnetic materials by equivalent current densities flowing, for insulating ferrites, on the surface of the core. Firstly, the limits of available μPEEC algorithms are pointed out and improvements are achieved to overcome calculation inaccuracies linked to magnetic angular cavities (windows) dug in power electronics transformers. Secondly, the new μPEEC formulation is implemented and used to evaluate the specific inductance per turns squared (Al) of a 9kVA, 290g, 3-winding planar transformer core and results are compared to core manufacturer data. Finally, interest for power electronics engineers of having a fast and accurate computing method for designing inductors and transformers is highlighted.","PeriodicalId":256756,"journal":{"name":"2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115385509","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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