The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform

J Laskar - One of the best experts on this subject based on the ideXlab platform.

  • a high power cmos switch using a novel adaptive voltage swing Distribution Method in multistack fets
    IEEE Transactions on Microwave Theory and Techniques, 2008
    Co-Authors: J Laskar
    Abstract:

    A high-power CMOS switch using a novel adaptive voltage swing Distribution Method in a multistack field-effect transistor (FET) scheme is proposed. The proposed adaptive voltage swing Distribution Method in multistack FETs is very effective in preventing unwanted channel formation with low control voltage supply in OFF-state FETs. This, in turn, increases power-handling capability when a large-signal voltage swing is applied. In the proposed CMOS switch, the behavior of the voltage swing in OFF-state multistack FETs shows a difference with respect to the level of input voltage swing. The characteristics of voltage swing Distribution and leakage channel formation in the CMOS switch is fully analyzed with incorporation of the novel adaptive voltage swing Distribution Method into a three-stacked nMOS Rx switch in a standard 0.18-mum triple-well CMOS process. In addition, linearity of the proposed technique is verified through the measurement data of the single-pole double-throw switches that employ the proposed technique in the Rx switch. Two different types of configurations are implemented and characterized at the Rx switches, which consist of four-stacked nMOS devices, to demonstrate the Method of minimizing voltage stress issues on one of the multistacked FETs. Layout consideration was also taken to prevent interference between leakage signals at the substrate. The measured performance of the proposed design shows an input 0.3-dB compression point of 33.5 dBm at 1.9 GHz. To the best of our knowledge, this is the highest power-handling capability of a CMOS switch in a standard CMOS process ever reported. The insertion losses of the Tx and Rx switches are 1.6 and 1.9 dB, respectively, at 1.9 GHz. The isolation of the Tx and Rx switches is around 20 and 30 dB, respectively, at 1.9 GHz.

  • a high power cmos switch using a novel adaptive voltage swing Distribution Method in multistack fets
    IEEE Transactions on Microwave Theory and Techniques, 2008
    Co-Authors: Minsik Ahn, Changho Lee, Byungsung Kim, J Laskar
    Abstract:

    A high-power CMOS switch using a novel adaptive voltage swing Distribution Method in a multistack field-effect transistor (FET) scheme is proposed. The proposed adaptive voltage swing Distribution Method in multistack FETs is very effective in preventing unwanted channel formation with low control voltage supply in OFF-state FETs. This, in turn, increases power-handling capability when a large-signal voltage swing is applied. In the proposed CMOS switch, the behavior of the voltage swing in OFF-state multistack FETs shows a difference with respect to the level of input voltage swing. The characteristics of voltage swing Distribution and leakage channel formation in the CMOS switch is fully analyzed with incorporation of the novel adaptive voltage swing Distribution Method into a three-stacked nMOS Rx switch in a standard 0.18-mum triple-well CMOS process. In addition, linearity of the proposed technique is verified through the measurement data of the single-pole double-throw switches that employ the proposed technique in the Rx switch. Two different types of configurations are implemented and characterized at the Rx switches, which consist of four-stacked nMOS devices, to demonstrate the Method of minimizing voltage stress issues on one of the multistacked FETs. Layout consideration was also taken to prevent interference between leakage signals at the substrate. The measured performance of the proposed design shows an input 0.3-dB compression point of 33.5 dBm at 1.9 GHz. To the best of our knowledge, this is the highest power-handling capability of a CMOS switch in a standard CMOS process ever reported. The insertion losses of the Tx and Rx switches are 1.6 and 1.9 dB, respectively, at 1.9 GHz. The isolation of the Tx and Rx switches is around 20 and 30 dB, respectively, at 1.9 GHz.

Meiyan Wang - One of the best experts on this subject based on the ideXlab platform.

  • vsc mtdc system integrating offshore wind farms based optimal Distribution Method for financial improvement on wind producers
    IEEE Transactions on Industry Applications, 2019
    Co-Authors: Kaiqi Sun, Wei-jen Lee, Zhuodi Wang, Weiyu Bao, Zhijie Liu, Meiyan Wang
    Abstract:

    As the typical clean and renewable energy, wind energy has witnessed a continuous annual increase in the last few decades. Due to the random and intermittent characteristics, the wind producers in the electric market meet serious financial losses caused by the deviation between the actual power output and forecasting result. It is difficult to increase the accuracy of forecasting in a short time. How to improve the financial income has become a major task to wind producers and academia. Being the backbone network of the offshore wind farms (OWFs), voltage source converter-based multi-terminal HVdc system (VSC-MTdc) has been regarded as one of the effective solutions to transport wind power. In this paper, an optimal Distribution Method is proposed for VSC-MTdc system integrating OWFs to reduce the financial loss due to wind power output deviation. The proposed Method could be divided into two optimizing functions. The first optimizing function of the proposed Method is to analyze the onshore external system according to the historical system operation data and adjust the droop coefficient with the analytic hierarchy process. The second optimizing function of the proposed Method is to do further adjusting with the regulating price. With the case study, the proposed optimal Distribution Method has proved that it can bring more benefit to wind producers.

  • vsc mtdc system integrating offshore wind farms based optimal Distribution Method for financial improvement on wind producers
    IEEE Industry Applications Society Annual Meeting, 2018
    Co-Authors: Kaiqi Sun, Wei-jen Lee, Zhuodi Wang, Weiyu Bao, Zhijie Liu, Meiyan Wang
    Abstract:

    As the typical clean and renewable energy, wind energy has witness a continuous annual increase in last few decades. Due to the random and intermittent characteristics, the wind producers in the electric market meet serious financial losses caused by deviation between the actual power output and forecasting result. Increasing the accurate of forecasting is difficult to achieve in a short time, how to improve the financial income has become a major task to wind producers and academia. As the backbone network of the offshore wind farms, VSC-MTDC has been regarded as one of the effective solutions to transport wind power. In this paper, an optimal Distribution Method is proposed for VSC-MTDC system integrating offshore wind farms to reduce the financial loss due to deviation between the actual wind power output and forecasting result. The proposed Method could be divided into two parts. The first part of the proposed Method is to analyze the onshore external system according to the historical system operation data and adjust the droop coefficient with analytic hierarchy process. The second part of the proposed Method is to do the further adjusting according to the regulating price. With the simulation results, the proposed optimal Distribution Method is proved that it could bring more benefit to wind producers without more additional investment.

Imrul Reza Shishir - One of the best experts on this subject based on the ideXlab platform.

  • analysis of wind energy prospect for power generation by three weibull Distribution Methods
    Energy Procedia, 2015
    Co-Authors: A K Azad, M G Rasul, Rubayat Islam, Imrul Reza Shishir
    Abstract:

    Abstract Wind energy is one of the fastest growing sectors in renewable energy. These energy resources are freely available throughout the world. It is one of the zero emission energy sources. The wind energy is used mainly for two purposes namely irrigation (water pumping) and electricity generation. The prospect of wind energy can be analyzed by different Methods. Weibull Distribution Method is one of the widely acceptable Methods for estimating wind energy. In this paper, the prospect of wind energy in Bangladesh is analyzed by Weibull Distribution Method. The data were collected from Meteorological Department of Bangladesh located in different areas of the country. Three different Weibull Distribution Methods were used to find out Weibull parameters which were verified using different widely acceptable statistical tools. Relative percentage error, chi-square error, analysis of variance etc. are the efficient statistical tools to rank the Method which was used in this study. The study identified the most prospects windy site by applying efficient least square Method with minimum error.

Haobin Jiang - One of the best experts on this subject based on the ideXlab platform.

  • multi objective coordination control strategy of distributed drive electric vehicle by orientated tire force Distribution Method
    IEEE Access, 2018
    Co-Authors: Long Chen, Te Chen, Xing Xu, Haobin Jiang
    Abstract:

    In order to improve the extension mileage and ensure the yaw stability of the distributed drive electric vehicle simultaneously, a multi-objective coordination control strategy is presented in this paper, in which the optimal vehicle-state estimation Method and the orientated tire force Distribution Method are designed. The longitudinal force estimation is designed using the unknown input observer Kalman filter, a novel yaw rate and a vehicle sideslip angle estimation scheme is proposed by an observer error compensation Method. A multi-objective hierarchical vehicle motion control strategy is developed to monitor the yaw stability and improve the energy efficiency of vehicle in real time. In the upper layer controller design, a sliding mode controller is proposed to track the desired yaw rate. In the lower layer controller design, the orientated tire force Distribution scheme is presented to improve the motor efficiency and reduce the energy loss caused by vehicle steering resistance while ensuring the yaw stability of vehicle. Finally, the effectiveness of the proposed estimation Method and the global coordination control strategy is validated by simulation in CarSim-Simulink joint platform and road test.

Long Chen - One of the best experts on this subject based on the ideXlab platform.

  • torque Distribution Method based on vibration instability of ps hev transmission system
    Proceedings of the Institution of Mechanical Engineers Part D: Journal of Automobile Engineering, 2020
    Co-Authors: Donghai Hu, Long Chen, Jiajia Wang
    Abstract:

    The power-split hybrid electric vehicle has multiple working modes, which can be switched to different working mode according to different working conditions. The main switching process involved in...

  • multi objective coordination control strategy of distributed drive electric vehicle by orientated tire force Distribution Method
    IEEE Access, 2018
    Co-Authors: Long Chen, Te Chen, Xing Xu, Haobin Jiang
    Abstract:

    In order to improve the extension mileage and ensure the yaw stability of the distributed drive electric vehicle simultaneously, a multi-objective coordination control strategy is presented in this paper, in which the optimal vehicle-state estimation Method and the orientated tire force Distribution Method are designed. The longitudinal force estimation is designed using the unknown input observer Kalman filter, a novel yaw rate and a vehicle sideslip angle estimation scheme is proposed by an observer error compensation Method. A multi-objective hierarchical vehicle motion control strategy is developed to monitor the yaw stability and improve the energy efficiency of vehicle in real time. In the upper layer controller design, a sliding mode controller is proposed to track the desired yaw rate. In the lower layer controller design, the orientated tire force Distribution scheme is presented to improve the motor efficiency and reduce the energy loss caused by vehicle steering resistance while ensuring the yaw stability of vehicle. Finally, the effectiveness of the proposed estimation Method and the global coordination control strategy is validated by simulation in CarSim-Simulink joint platform and road test.