The Experts below are selected from a list of 807 Experts worldwide ranked by ideXlab platform

Daniel Sadarnac - One of the best experts on this subject based on the ideXlab platform.

  • Double-Phase High-Efficiency, Wide Load Range High- Voltage/Low-Voltage LLC DC/DC Converter for Electric/Hybrid Vehicles
    IEEE Transactions on Power Electronics, 2017
    Co-Authors: Gang Yang, Patrick Dubus, Daniel Sadarnac
    Abstract:

    In this paper, a 2.5-kW 330–410-V/14-V, 250-kHz dc/dc converter prototype is developed targeted for Electric ve-hicle/Hybrid vehicle applications. Benefiting from numerous ad-vantages brought by the LLC resonant topology, this converter is able to perform high efficiency, high power density, and low EMI. To arrange high-output current, this paper proposes a parallel-connected LLC structure with developed novel double-loop control to realize an equal current distribution and an overall efficiency improvement. Considering the LLC cell's dimensioning, this paper establishes a more precise model by taking the secondary leak-age inductance into consideration. System amelioration and design considerations of the developed LLC are also presented in this pa-per. A special transformer is presented, and various types of power losses are quantified to improve its efficiency. This converter also implements synchronous rectification, power semiconductor mod-ule, and an air-cooling system. The power conversion performance of this prototype is measured and the developed prototype attains a peak efficiency of 95% and efficiency is higher than 94% from 500 W to 2 kW, with a power density of 1 W/cm 3 . Finally, the EMC results of this prototype are also measured and presented.

  • double phase high efficiency wide load range high voltage low voltage llc dc dc converter for Electric Hybrid Vehicles
    IEEE Transactions on Power Electronics, 2015
    Co-Authors: Gang Yang, Patrick Dubus, Daniel Sadarnac
    Abstract:

    In this paper, a 2.5-kW 330–410-V/14-V, 250-kHz dc/dc converter prototype is developed targeted for Electric vehicle/Hybrid vehicle applications. Benefiting from numerous advantages brought by the LLC resonant topology, this converter is able to perform high efficiency, high power density, and low EMI. To arrange high-output current, this paper proposes a parallel-connected LLC structure with developed novel double-loop control to realize an equal current distribution and an overall efficiency improvement. Considering the LLC cell's dimensioning, this paper establishes a more precise model by taking the secondary leakage inductance into consideration. System amelioration and design considerations of the developed LLC are also presented in this paper. A special transformer is presented, and various types of power losses are quantified to improve its efficiency. This converter also implements synchronous rectification, power semiconductor module, and an air-cooling system. The power conversion performance of this prototype is measured and the developed prototype attains a peak efficiency of 95% and efficiency is higher than 94% from 500 W to 2 kW, with a power density of 1 W/cm3. Finally, the EMC results of this prototype are also measured and presented.

  • High efficiency parallel-parallel LLC resonant converter for HV/LV power conversion in Electric/Hybrid Vehicles
    PCIM Europe 2014; International Exhibition and Conference for Power Electronics Intelligent Motion Renewable Energy and Energy Management, 2014
    Co-Authors: Gang Yang, Patrick Dubus, Pierre Sardat, Daniel Sadarnac
    Abstract:

    The design of a Hybrid/Electric automobile oriented 2.5kW, 250kHz, HV/LV double phase parallel-parallel connected LLC resonant converter is presented. This paper proposed the concept of double phase LLC with its double loop control strategy to share the power equally between the two power cells and to maintain a high efficiency among a wide output power range. Design considerations, including the MOSFETs power module, magnetic components integration and air-cooling system are presented in detail. The final developed prototype, which can almost be directly industrialized, is targeted for future utilization in Electric Vehicles/Hybrid Vehicles. The total prototype performs 3kg, 2.5L, and a high power density 1W/cm(exp 3). Experimental results prove that a peak efficiency of 95% is obtained and efficiency is above 94% from 500W to 2kW.

Gang Yang - One of the best experts on this subject based on the ideXlab platform.

  • Double-Phase High-Efficiency, Wide Load Range High- Voltage/Low-Voltage LLC DC/DC Converter for Electric/Hybrid Vehicles
    IEEE Transactions on Power Electronics, 2017
    Co-Authors: Gang Yang, Patrick Dubus, Daniel Sadarnac
    Abstract:

    In this paper, a 2.5-kW 330–410-V/14-V, 250-kHz dc/dc converter prototype is developed targeted for Electric ve-hicle/Hybrid vehicle applications. Benefiting from numerous ad-vantages brought by the LLC resonant topology, this converter is able to perform high efficiency, high power density, and low EMI. To arrange high-output current, this paper proposes a parallel-connected LLC structure with developed novel double-loop control to realize an equal current distribution and an overall efficiency improvement. Considering the LLC cell's dimensioning, this paper establishes a more precise model by taking the secondary leak-age inductance into consideration. System amelioration and design considerations of the developed LLC are also presented in this pa-per. A special transformer is presented, and various types of power losses are quantified to improve its efficiency. This converter also implements synchronous rectification, power semiconductor mod-ule, and an air-cooling system. The power conversion performance of this prototype is measured and the developed prototype attains a peak efficiency of 95% and efficiency is higher than 94% from 500 W to 2 kW, with a power density of 1 W/cm 3 . Finally, the EMC results of this prototype are also measured and presented.

  • Design of High Efficiency High Power Density 10.5kW Three Phase On-board-charger for Electric/Hybrid Vehicles
    PCIM Europe 2016; International Exhibition and Conference for Power Electronics Intelligent Motion Renewable Energy and Energy Management, 2016
    Co-Authors: Gang Yang, Eirik Draugedalen, Torbjorn Sorsdahl, Roar Lindseth
    Abstract:

    The design of an Electric/Hybrid automobile oriented 10.5kW, AC-to-DC three phase onboard-charger is presented in this paper. In order to achieve full power ability when plugged into a three phase grid and single phase grid, three single phase AC/DC converters are paralleled together to offer full power delivery from AC grid to DC high voltage battery. Each phase AC/DC converter is composed by a PFC and a LLC resonant converter while the output current of each phase is regulated to an equal reference to get an equal power distribution. Benefiting from the ZVS characteristics of LLC resonant converter, the converter achieves high power efficiency and low volume. The total prototype performs 6L, and a high power density 1.75W/cm(exp 3). Experimental results prove that a peak efficiency of 95.5% is obtained and efficiency is higher than 94% from 1.6kW to 10.5kW.

  • double phase high efficiency wide load range high voltage low voltage llc dc dc converter for Electric Hybrid Vehicles
    IEEE Transactions on Power Electronics, 2015
    Co-Authors: Gang Yang, Patrick Dubus, Daniel Sadarnac
    Abstract:

    In this paper, a 2.5-kW 330–410-V/14-V, 250-kHz dc/dc converter prototype is developed targeted for Electric vehicle/Hybrid vehicle applications. Benefiting from numerous advantages brought by the LLC resonant topology, this converter is able to perform high efficiency, high power density, and low EMI. To arrange high-output current, this paper proposes a parallel-connected LLC structure with developed novel double-loop control to realize an equal current distribution and an overall efficiency improvement. Considering the LLC cell's dimensioning, this paper establishes a more precise model by taking the secondary leakage inductance into consideration. System amelioration and design considerations of the developed LLC are also presented in this paper. A special transformer is presented, and various types of power losses are quantified to improve its efficiency. This converter also implements synchronous rectification, power semiconductor module, and an air-cooling system. The power conversion performance of this prototype is measured and the developed prototype attains a peak efficiency of 95% and efficiency is higher than 94% from 500 W to 2 kW, with a power density of 1 W/cm3. Finally, the EMC results of this prototype are also measured and presented.

  • High efficiency parallel-parallel LLC resonant converter for HV/LV power conversion in Electric/Hybrid Vehicles
    PCIM Europe 2014; International Exhibition and Conference for Power Electronics Intelligent Motion Renewable Energy and Energy Management, 2014
    Co-Authors: Gang Yang, Patrick Dubus, Pierre Sardat, Daniel Sadarnac
    Abstract:

    The design of a Hybrid/Electric automobile oriented 2.5kW, 250kHz, HV/LV double phase parallel-parallel connected LLC resonant converter is presented. This paper proposed the concept of double phase LLC with its double loop control strategy to share the power equally between the two power cells and to maintain a high efficiency among a wide output power range. Design considerations, including the MOSFETs power module, magnetic components integration and air-cooling system are presented in detail. The final developed prototype, which can almost be directly industrialized, is targeted for future utilization in Electric Vehicles/Hybrid Vehicles. The total prototype performs 3kg, 2.5L, and a high power density 1W/cm(exp 3). Experimental results prove that a peak efficiency of 95% is obtained and efficiency is above 94% from 500W to 2kW.

Patrick Dubus - One of the best experts on this subject based on the ideXlab platform.

  • Double-Phase High-Efficiency, Wide Load Range High- Voltage/Low-Voltage LLC DC/DC Converter for Electric/Hybrid Vehicles
    IEEE Transactions on Power Electronics, 2017
    Co-Authors: Gang Yang, Patrick Dubus, Daniel Sadarnac
    Abstract:

    In this paper, a 2.5-kW 330–410-V/14-V, 250-kHz dc/dc converter prototype is developed targeted for Electric ve-hicle/Hybrid vehicle applications. Benefiting from numerous ad-vantages brought by the LLC resonant topology, this converter is able to perform high efficiency, high power density, and low EMI. To arrange high-output current, this paper proposes a parallel-connected LLC structure with developed novel double-loop control to realize an equal current distribution and an overall efficiency improvement. Considering the LLC cell's dimensioning, this paper establishes a more precise model by taking the secondary leak-age inductance into consideration. System amelioration and design considerations of the developed LLC are also presented in this pa-per. A special transformer is presented, and various types of power losses are quantified to improve its efficiency. This converter also implements synchronous rectification, power semiconductor mod-ule, and an air-cooling system. The power conversion performance of this prototype is measured and the developed prototype attains a peak efficiency of 95% and efficiency is higher than 94% from 500 W to 2 kW, with a power density of 1 W/cm 3 . Finally, the EMC results of this prototype are also measured and presented.

  • double phase high efficiency wide load range high voltage low voltage llc dc dc converter for Electric Hybrid Vehicles
    IEEE Transactions on Power Electronics, 2015
    Co-Authors: Gang Yang, Patrick Dubus, Daniel Sadarnac
    Abstract:

    In this paper, a 2.5-kW 330–410-V/14-V, 250-kHz dc/dc converter prototype is developed targeted for Electric vehicle/Hybrid vehicle applications. Benefiting from numerous advantages brought by the LLC resonant topology, this converter is able to perform high efficiency, high power density, and low EMI. To arrange high-output current, this paper proposes a parallel-connected LLC structure with developed novel double-loop control to realize an equal current distribution and an overall efficiency improvement. Considering the LLC cell's dimensioning, this paper establishes a more precise model by taking the secondary leakage inductance into consideration. System amelioration and design considerations of the developed LLC are also presented in this paper. A special transformer is presented, and various types of power losses are quantified to improve its efficiency. This converter also implements synchronous rectification, power semiconductor module, and an air-cooling system. The power conversion performance of this prototype is measured and the developed prototype attains a peak efficiency of 95% and efficiency is higher than 94% from 500 W to 2 kW, with a power density of 1 W/cm3. Finally, the EMC results of this prototype are also measured and presented.

  • High efficiency parallel-parallel LLC resonant converter for HV/LV power conversion in Electric/Hybrid Vehicles
    PCIM Europe 2014; International Exhibition and Conference for Power Electronics Intelligent Motion Renewable Energy and Energy Management, 2014
    Co-Authors: Gang Yang, Patrick Dubus, Pierre Sardat, Daniel Sadarnac
    Abstract:

    The design of a Hybrid/Electric automobile oriented 2.5kW, 250kHz, HV/LV double phase parallel-parallel connected LLC resonant converter is presented. This paper proposed the concept of double phase LLC with its double loop control strategy to share the power equally between the two power cells and to maintain a high efficiency among a wide output power range. Design considerations, including the MOSFETs power module, magnetic components integration and air-cooling system are presented in detail. The final developed prototype, which can almost be directly industrialized, is targeted for future utilization in Electric Vehicles/Hybrid Vehicles. The total prototype performs 3kg, 2.5L, and a high power density 1W/cm(exp 3). Experimental results prove that a peak efficiency of 95% is obtained and efficiency is above 94% from 500W to 2kW.

Hamid Gualous - One of the best experts on this subject based on the ideXlab platform.

  • Online Lifetime Estimation of Supercapacitors
    IEEE Transactions on Power Electronics, 2017
    Co-Authors: Hicham Chaoui, Hamid Gualous
    Abstract:

    This paper proposes an online lifetime estimation methodology for supercapacitors. The online technique uses a Lyapunov-based adaptation law to estimate online the supercapacitor's parameters. Unlike offline time- or frequency-domain characterization techniques that require discontinuation of the system's normal operation, the proposed approach is more suitable for real-time applications, such as Electric/Hybrid Vehicles, as it provides online lifetime estimation. Furthermore, convergence and stability analysis is provided by Lyapunov's stability theory as opposed to many online estimators available in the literature. The effectiveness of the proposed strategy is validated through experiments along with comparison against two different methods.

  • Prediction Aging Model for Supercapacitor's Calendar Life in Vehicular Applications
    IEEE Transactions on Vehicular Technology, 2016
    Co-Authors: Asmae El Mejdoubi, Jalal Sabor, Amrane Oukaour, Hicham Chaoui, Hamid Gualous, Youssef Slamani
    Abstract:

    Supercapacitors have received increasing interest from the vehicular community due to their high power density and compact size, making them good candidates for high-performance applications, such as Electric/Hybrid Vehicles and railway transportation. However, supercapacitors have a finite lifespan due to the occurrence of unwanted physical changes. These changes are usually irreversible, which yield capacitance loss and performance deterioration, regardless of the components' usage. Most of the available aging models are based on particular assumptions of capacitance loss. Unlike these techniques, this paper considers different capacitance aging models and compared them to verify their accuracy. In addition, a generalized prediction aging model for the calendar life is presented based on chemical reactions causing degradation. The performance of the proposed model is compared with the classical and modified Eyring's law. To better show the effectiveness of the proposed prediction aging strategy and capacitance loss models, 12 supercapacitors are tested under 12 different operating temperatures and bias voltage conditions. Experimental results highlight the high estimation accuracy of the proposed prediction aging model under various operating conditions.

  • Experimental investigation of aging calendar parameters for supercapacitors
    2015 3rd International Renewable and Sustainable Energy Conference (IRSEC), 2015
    Co-Authors: Asmae El Mejdoubi, Amrane Oukaour, Hicham Chaoui, Hamid Gualous, Jalal Sabor
    Abstract:

    Supercapacitors have received an increasing interest from the power electronics community due to their high power density and compact size. These advantages make them good candidates for high-performance applications, such as Electric/Hybrid Vehicles. In transportation application, the calendar phase presents an important part in the supercapcacitor life cycle. Understanding the aging calendar behavior allows us to manage well the aging parameters, as the operating temperature and the bias voltage. In order to achieve this goal, an investigation has been conducted on supercapacitor aging calendar conditions. Various tests are carried-out on 12 supercapacitors under 3 bias voltages (2,8V, 2,9V, and 3V) and 4 temperatures (55°C, 60°C, 65°C, and 70°C) until the limit of aging is reached for each supercapacitor. The supercapacitors' resistances and capacitances evolution are studied to establish the aging rate law with respect to the aging parameters variation.

Hicham Chaoui - One of the best experts on this subject based on the ideXlab platform.

  • Online Lifetime Estimation of Supercapacitors
    IEEE Transactions on Power Electronics, 2017
    Co-Authors: Hicham Chaoui, Hamid Gualous
    Abstract:

    This paper proposes an online lifetime estimation methodology for supercapacitors. The online technique uses a Lyapunov-based adaptation law to estimate online the supercapacitor's parameters. Unlike offline time- or frequency-domain characterization techniques that require discontinuation of the system's normal operation, the proposed approach is more suitable for real-time applications, such as Electric/Hybrid Vehicles, as it provides online lifetime estimation. Furthermore, convergence and stability analysis is provided by Lyapunov's stability theory as opposed to many online estimators available in the literature. The effectiveness of the proposed strategy is validated through experiments along with comparison against two different methods.

  • Prediction Aging Model for Supercapacitor's Calendar Life in Vehicular Applications
    IEEE Transactions on Vehicular Technology, 2016
    Co-Authors: Asmae El Mejdoubi, Jalal Sabor, Amrane Oukaour, Hicham Chaoui, Hamid Gualous, Youssef Slamani
    Abstract:

    Supercapacitors have received increasing interest from the vehicular community due to their high power density and compact size, making them good candidates for high-performance applications, such as Electric/Hybrid Vehicles and railway transportation. However, supercapacitors have a finite lifespan due to the occurrence of unwanted physical changes. These changes are usually irreversible, which yield capacitance loss and performance deterioration, regardless of the components' usage. Most of the available aging models are based on particular assumptions of capacitance loss. Unlike these techniques, this paper considers different capacitance aging models and compared them to verify their accuracy. In addition, a generalized prediction aging model for the calendar life is presented based on chemical reactions causing degradation. The performance of the proposed model is compared with the classical and modified Eyring's law. To better show the effectiveness of the proposed prediction aging strategy and capacitance loss models, 12 supercapacitors are tested under 12 different operating temperatures and bias voltage conditions. Experimental results highlight the high estimation accuracy of the proposed prediction aging model under various operating conditions.

  • Experimental investigation of aging calendar parameters for supercapacitors
    2015 3rd International Renewable and Sustainable Energy Conference (IRSEC), 2015
    Co-Authors: Asmae El Mejdoubi, Amrane Oukaour, Hicham Chaoui, Hamid Gualous, Jalal Sabor
    Abstract:

    Supercapacitors have received an increasing interest from the power electronics community due to their high power density and compact size. These advantages make them good candidates for high-performance applications, such as Electric/Hybrid Vehicles. In transportation application, the calendar phase presents an important part in the supercapcacitor life cycle. Understanding the aging calendar behavior allows us to manage well the aging parameters, as the operating temperature and the bias voltage. In order to achieve this goal, an investigation has been conducted on supercapacitor aging calendar conditions. Various tests are carried-out on 12 supercapacitors under 3 bias voltages (2,8V, 2,9V, and 3V) and 4 temperatures (55°C, 60°C, 65°C, and 70°C) until the limit of aging is reached for each supercapacitor. The supercapacitors' resistances and capacitances evolution are studied to establish the aging rate law with respect to the aging parameters variation.