The Experts below are selected from a list of 294 Experts worldwide ranked by ideXlab platform

Do-kwan Hong - One of the best experts on this subject based on the ideXlab platform.

  • Unbalance response analysis and experimental validation of an ultra high speed Motor-Generator for microturbine Generators considering balancing.
    Sensors, 2014
    Co-Authors: Do-kwan Hong
    Abstract:

    The objective of the present study was to deal with the rotordynamics of the rotor of an ultra-high speed PM type synchronous Motor-Generator for a 500 W rated micro gas turbine Generator. This paper introduces dynamic analysis, and experiments on the Motor-Generator. The focus is placed on an analytical approach considering the mechanical dynamic problems. It is essential to deal with dynamic stability at ultra-high speeds. Unbalance response analysis is performed by calculating the unbalance with and without balancing using a balancing machine. Critical speed analysis is performed to determine the operating speed with sufficient separation margin. The unbalance response analysis is compared with the experimental results considering the balancing grade (ISO 1940-1) and predicted vibration displacement with and without balancing. Based on these results, a high-speed Motor-Generator was successfully developed.

  • Development of a super high speed Motor-Generator and controller
    Journal of Applied Physics, 2014
    Co-Authors: Do-kwan Hong
    Abstract:

    To develop a super high speed Motor-Generator, it is essential to deal with magnetic analysis, dynamic analysis, and experimental evaluation of the heart of the MTG (Microturbine Generator) system, the Motor-Generator. An amorphous core is applied to a stator core for reduction of iron loss at high speed, and the Motor-Generator is analyzed with considerations focused on magnetic losses and the statistical optimum design. The performance of the amorphous core is validated by the analysis and experiment by back-to-back tests considering the AC load. Rotor dynamics is performed for dynamic stability at high speed using transient analysis orbit diagrams and compared with the experimental results. The simulation results of the Generator are compared with the experiment. Also a super high speed controller of the MTG system is developed using a sensorless algorithm, power stack, gate driver, digital signal processing, analog circuit, and radiation heat design. Based on these results, a high speed Motor-Generator and controller are successfully developed.

  • Performance verification of a high speed Motor-Generator for a microturbine Generator
    International Journal of Precision Engineering and Manufacturing, 2013
    Co-Authors: Do-kwan Hong, Yeon-ho Jeong
    Abstract:

    The Research Institute is developing a Motor-Generator that fits into a microturbine Generator (MTG) system with a power density of 500W. This paper introduces the design, analysis, production and assessment of the heart of an MTG system, the Motor-Generator, whereby an amorphous core is applied creatively to a stator core. The Motor-Generator is designed and analyzed with consideration to losses and the circuit by magnetic analysis. The centrifugal force analysis is performed for the static stability, and rotor dynamics is performed for dynamic stability at high speed. Back-to-back tests are done to assess the power generation characteristic of the Motor-Generator. The noise, vibration, and the internal temperature of the Motor-Generator are considered. Based on these results, a high speed Motor-Generator is successfully developed.

  • Investigations on a Super High Speed Motor-Generator for Microturbine Applications Using Amorphous Core
    IEEE Transactions on Magnetics, 2013
    Co-Authors: Do-kwan Hong, Yeon-ho Jeong
    Abstract:

    The research institute is developing a Motor-Generator that fits into a microturbine Generator (MTG) system with a power density of 500 W. This paper introduces the design, analysis, production and assessment of the heart of an MTG system, the Motor-Generator, whereby an amorphous core is applied creatively to a stator core. The Motor-Generator is designed and analyzed with consideration to losses and the circuit by magnetic analysis. The centrifugal force analysis is performed for the static stability, and rotor dynamics and unbalance analysis are performed for dynamic stability at high speed. CFD results are compared with the experiment, and are within a 3.2% deviation. Based on these results, a high-speed Motor-Generator is successfully developed.

  • THE PERFORMANCE ANALYSIS OF ULTRA HIGH SPEED PM TYPE SYNCHRONOUS Motor-Generator FOR MICRO TURBINE
    2012
    Co-Authors: Do-kwan Hong, Yeon-ho Jeong
    Abstract:

    This paper deals with loss analysis, structural, thermal-fluid and rotordynamics (critical speed and unbalance) which need in developing the Motor-Generator. This machine has designed of a Generator of 800 W, 400 krpm and a starter of 400 W, 200 krpm. The generated losses of Motor-Generator are derived by magnetic analysis. Thermal-fluid analysis is performed using loss analysis result. The critical speed is extracted by Campbell diagram. Unbalance vibration response analysis enable to predict the expected vibration amplitude by unbalance. The Motor-Generator is well-developed using the applied several techniques of analysis.

Yeon-ho Jeong - One of the best experts on this subject based on the ideXlab platform.

  • Performance verification of a high speed Motor-Generator for a microturbine Generator
    International Journal of Precision Engineering and Manufacturing, 2013
    Co-Authors: Do-kwan Hong, Yeon-ho Jeong
    Abstract:

    The Research Institute is developing a Motor-Generator that fits into a microturbine Generator (MTG) system with a power density of 500W. This paper introduces the design, analysis, production and assessment of the heart of an MTG system, the Motor-Generator, whereby an amorphous core is applied creatively to a stator core. The Motor-Generator is designed and analyzed with consideration to losses and the circuit by magnetic analysis. The centrifugal force analysis is performed for the static stability, and rotor dynamics is performed for dynamic stability at high speed. Back-to-back tests are done to assess the power generation characteristic of the Motor-Generator. The noise, vibration, and the internal temperature of the Motor-Generator are considered. Based on these results, a high speed Motor-Generator is successfully developed.

  • Investigations on a Super High Speed Motor-Generator for Microturbine Applications Using Amorphous Core
    IEEE Transactions on Magnetics, 2013
    Co-Authors: Do-kwan Hong, Yeon-ho Jeong
    Abstract:

    The research institute is developing a Motor-Generator that fits into a microturbine Generator (MTG) system with a power density of 500 W. This paper introduces the design, analysis, production and assessment of the heart of an MTG system, the Motor-Generator, whereby an amorphous core is applied creatively to a stator core. The Motor-Generator is designed and analyzed with consideration to losses and the circuit by magnetic analysis. The centrifugal force analysis is performed for the static stability, and rotor dynamics and unbalance analysis are performed for dynamic stability at high speed. CFD results are compared with the experiment, and are within a 3.2% deviation. Based on these results, a high-speed Motor-Generator is successfully developed.

  • THE PERFORMANCE ANALYSIS OF ULTRA HIGH SPEED PM TYPE SYNCHRONOUS Motor-Generator FOR MICRO TURBINE
    2012
    Co-Authors: Do-kwan Hong, Yeon-ho Jeong
    Abstract:

    This paper deals with loss analysis, structural, thermal-fluid and rotordynamics (critical speed and unbalance) which need in developing the Motor-Generator. This machine has designed of a Generator of 800 W, 400 krpm and a starter of 400 W, 200 krpm. The generated losses of Motor-Generator are derived by magnetic analysis. Thermal-fluid analysis is performed using loss analysis result. The critical speed is extracted by Campbell diagram. Unbalance vibration response analysis enable to predict the expected vibration amplitude by unbalance. The Motor-Generator is well-developed using the applied several techniques of analysis.

  • Analysis of cogging torque for high speed Motor/Generator
    Sixth International Conference on Electrical Machines and Systems 2003. ICEMS 2003., 2003
    Co-Authors: Seok-myoeng Jang, Yeon-ho Jeong
    Abstract:

    This paper deals with the magnetic field analysis and computation of cogging torque using an analytical method in high speed brushless Motor/Generator. The magnetic field is analyzed by solving space harmonics field analysis due to magnetizing distribution and the cogging torque is analyzed by combining field analysis with relative permeance.

A. W. F. V. Silveira - One of the best experts on this subject based on the ideXlab platform.

  • DSP based switched reluctance Motor/Generator
    2010 IEEE International Symposium on Industrial Electronics, 2010
    Co-Authors: A. W. F. V. Silveira, D. A. Andrade, A. Fleury, L. C. Gomes, C. A. Bissochi, L. C. Freitas
    Abstract:

    This article present a switched reluctance Motor/Generator drive. The half-bridge electronic converter topology is used to attain Motor operation mode. To change from Motor operational mode to generation mode the electronic converter structure is strategically modified through a relay switch, allowing the flux of power go to the load. Simulation and experimental results obtained for a 6×4 switched reluctance machine prototype operating as a Motor/Generator are presented. They show the behavior of the electrical machine during the transition between both operational modes. The DSP based control is successfully tested. Results presented here sustain the applicability of the switched reluctance machine as a Motor/Generator solution for general application.

  • Control of the SRM operating as a Motor/Generator
    2009 IEEE International Symposium on Industrial Electronics, 2009
    Co-Authors: A. W. F. V. Silveira, D. A. Andrade, L. C. Gomes, A. V. S. Fleury, C. A. Bissochi
    Abstract:

    This paper deals with switched reluctance machine used as a Motor/Generator drive. The Motoring operation is achieved with a half-bridge converter. A strategic modification in the electronic converter topology is required to allow the Generator operation mode. It is achieved automatically as well as the phase switching angles control is simultaneously provided. Three different techniques to control the voltage delivered to the load when the machine is operating as a Generator are evaluated. All of them exert control on the machine magnetization level. Simulated results are included to show the feasibility of the proposed techniques and to confirm the applicability of the switched reluctance machine as a Motor/Generator device.

  • Generated voltage control of the SRM operating as Motor/Generator
    2009 Brazilian Power Electronics Conference, 2009
    Co-Authors: A. W. F. V. Silveira, D. A. Andrade, L. C. Gomes, C. A. Bissochi, A. V. S. Fleury, R. J. Dias
    Abstract:

    This article treats the switched reluctance Motor/Generator drive for general purpose. A typical half-bridge converter topology is used to attain the Motor operation mode. Although, the converter topology is strategically modified to make possible the Generator operation mode. It is achieved automatically through a relay and so the phase demagnetization generates power to the load. Also the switching angles control must be simultaneously provided. Three techniques are proposed here to control the load voltage when the machine is operating as a Generator. All of them exert control on the machine magnetization level. Some simulated results are presented here to show that the proposed techniques are capable of been dealt with successfully. It is showing the applicability of the switched reluctance machine as a Motor/Generator device.

C. A. Bissochi - One of the best experts on this subject based on the ideXlab platform.

  • DSP based switched reluctance Motor/Generator
    2010 IEEE International Symposium on Industrial Electronics, 2010
    Co-Authors: A. W. F. V. Silveira, D. A. Andrade, A. Fleury, L. C. Gomes, C. A. Bissochi, L. C. Freitas
    Abstract:

    This article present a switched reluctance Motor/Generator drive. The half-bridge electronic converter topology is used to attain Motor operation mode. To change from Motor operational mode to generation mode the electronic converter structure is strategically modified through a relay switch, allowing the flux of power go to the load. Simulation and experimental results obtained for a 6×4 switched reluctance machine prototype operating as a Motor/Generator are presented. They show the behavior of the electrical machine during the transition between both operational modes. The DSP based control is successfully tested. Results presented here sustain the applicability of the switched reluctance machine as a Motor/Generator solution for general application.

  • Control of the SRM operating as a Motor/Generator
    2009 IEEE International Symposium on Industrial Electronics, 2009
    Co-Authors: A. W. F. V. Silveira, D. A. Andrade, L. C. Gomes, A. V. S. Fleury, C. A. Bissochi
    Abstract:

    This paper deals with switched reluctance machine used as a Motor/Generator drive. The Motoring operation is achieved with a half-bridge converter. A strategic modification in the electronic converter topology is required to allow the Generator operation mode. It is achieved automatically as well as the phase switching angles control is simultaneously provided. Three different techniques to control the voltage delivered to the load when the machine is operating as a Generator are evaluated. All of them exert control on the machine magnetization level. Simulated results are included to show the feasibility of the proposed techniques and to confirm the applicability of the switched reluctance machine as a Motor/Generator device.

  • Generated voltage control of the SRM operating as Motor/Generator
    2009 Brazilian Power Electronics Conference, 2009
    Co-Authors: A. W. F. V. Silveira, D. A. Andrade, L. C. Gomes, C. A. Bissochi, A. V. S. Fleury, R. J. Dias
    Abstract:

    This article treats the switched reluctance Motor/Generator drive for general purpose. A typical half-bridge converter topology is used to attain the Motor operation mode. Although, the converter topology is strategically modified to make possible the Generator operation mode. It is achieved automatically through a relay and so the phase demagnetization generates power to the load. Also the switching angles control must be simultaneously provided. Three techniques are proposed here to control the load voltage when the machine is operating as a Generator. All of them exert control on the machine magnetization level. Some simulated results are presented here to show that the proposed techniques are capable of been dealt with successfully. It is showing the applicability of the switched reluctance machine as a Motor/Generator device.

Dagui Huang - One of the best experts on this subject based on the ideXlab platform.

  • Research on energy recovery for electric vehicle based on Motor-Generator integration system
    2013 IEEE International Conference on Mechatronics and Automation, 2013
    Co-Authors: Dagui Huang
    Abstract:

    This paper took electric vehicle as research object and concentrated on its energy recovery system. In our experimental project, the idea of Motor-Generator integration was proposed. Theory and method to accomplish the integration was also presented in detail. Additionally, an intelligent gearbox was assembled into our vehicle model, which is a relatively new attempt to the research of electric vehicle. The significant role played by gearbox in energy recovery system was revealed in the paper as well. Finally, a specific simulation model was built up with CRUISE to verify our supposition. Results indicated our supposition was scientific.