The Experts below are selected from a list of 1023 Experts worldwide ranked by ideXlab platform

John D. Herbst - One of the best experts on this subject based on the ideXlab platform.

  • as part of the Federal Railroad Administration’s Next
    2014
    Co-Authors: Brian T. Murphy, Hamid Ouroua, Matthew T. Caprio, John D. Herbst
    Abstract:

    The Center for Electromechanics at the University of Texas at Austin is developing a power averaging Flywheel Battery for a high speed passenger locomotiv

  • as part of the Federal Railroad Administration’s Next
    2014
    Co-Authors: Matthew T. Caprio, Brian T. Murphy, John D. Herbst
    Abstract:

    The Center for Electromechanics at the University of Texas at Austin is developing a power averaging Flywheel Battery for use on high speed passenger train

  • permanent magnet bias homopolar magnetic bearings for a 130 kw hr composite Flywheel
    2004
    Co-Authors: Brian T. Murphy, Matthew T. Caprio, A Ouroua, John D. Herbst
    Abstract:

    The Center for Electromechanics at the University of Texas at Austin is developing a power averaging Flywheel Battery for a high speed passenger locomotive as part of the Federal Railroad Administration’s Next Generation High Speed Rail Program. The Flywheel rotor, which weighs 5100 lb, is designed to store 130 kW-hr of energy at a top design speed of 15,000 rpm. The vertical rotor, which runs in a vacuum, is supported by a 5 axis magnetic bearing system. The Flywheel housing is gimbal mounted to isolate the vehicle chassis from the gyroscopic forces in this dynamic application. A high speed 2 MW motor-generator, which is outside the vacuum, is directly coupled to the Flywheel with the use of a rotary vacuum seal. This paper discusses the design of the magnetic bearing actuators. There are two identical radial bearings and a double acting thrust bearing, each employing permanent magnet homopolar bias fields coupled with active control coils. The bearings employ permanent magnet homopolar bias fields. Some electromagnetic design analysis of the actuators is presented, along with test results for static electromagnetic fields measured within the bearing air gaps. Measured hysteresis loss in the radial bearing laminations is also presented. Analytical estimates of actuator bandwidth are compared to measurements. A preliminary build of the Flywheel rotor (the design of which is discussed in a companion paper) has been successfully spin tested to 13,600 rpm with the use of a digital bearing controller. Performance of the position sensors, fiber optic for radial and eddy current for axial, has thus far been adequate.

Pragasen Pillay - One of the best experts on this subject based on the ideXlab platform.

  • The potential impact of small-scale Flywheel energy storage technology on Uganda’s energy sector
    University of Cape Town, 2017
    Co-Authors: R Okou, A B Sebitosi, Azeem Khan, Pragasen Pillay
    Abstract:

    The energy crisis in Uganda has caused a sharp decline in the growth of the industry sector from 10.8% to 4.5% between 2004/5 and 2005/6. This crisis has escalated the power disruptions, which have had adverse effects on various sectors. While business owners have resorted to importation of fossil fuel generators that have increased the cost of production, others have resorted to Battery energy storage systems to cater for short outages, which are limited in life span, depth of discharge, among others. These interventions have, thus, further in-creased the cost of goods and services. In addition, the rural populations using solar home systems incur high Battery maintenance and replacement costs. In this paper an electromechanical Flywheel Battery is proposed as a better alternative in mitigating energy storage problems. It is found that by replacing the Battery storage systems with the electromechanical Flywheel Battery, a saving of up to 35% on cost of energy can be made in the solar home systems and for the industry sector, the power disruptions could be reduced

  • the potential impact of small scale Flywheel energy storage technology on uganda s energy sector
    Journal of Energy in Southern Africa, 2009
    Co-Authors: R Okou, A B Sebitosi, Azeem Khan, Pragasen Pillay
    Abstract:

    The energy crisis in Uganda has caused a sharp decline in the growth of the industry sector from 10.8% to 4.5% between 2004/5 and 2005/6. This crisis has escalated the power disruptions, which have had adverse effects on various sectors. While business owners have resorted to importation of fossil fuel generators that have increased the cost of production, others have resorted to Battery energy storage systems to cater for short outages, which are limited in life span, depth of discharge, among others. These interventions have, thus, further increased the cost of goods and services. In addition, the rural populations using solar home systems incur high Battery maintenance and replacement costs. In this paper an electromechanical Flywheel Battery is proposed as a better alternative in mitigating energy storage problems. It is found that by replacing the Battery storage systems with the electromechanical Flywheel Battery, a saving of up to 35% on cost of energy can be made in the solar home systems and for the industry sector, the power disruptions could be reduced.

Brian T. Murphy - One of the best experts on this subject based on the ideXlab platform.

  • as part of the Federal Railroad Administration’s Next
    2014
    Co-Authors: Brian T. Murphy, Hamid Ouroua, Matthew T. Caprio, John D. Herbst
    Abstract:

    The Center for Electromechanics at the University of Texas at Austin is developing a power averaging Flywheel Battery for a high speed passenger locomotiv

  • as part of the Federal Railroad Administration’s Next
    2014
    Co-Authors: Matthew T. Caprio, Brian T. Murphy, John D. Herbst
    Abstract:

    The Center for Electromechanics at the University of Texas at Austin is developing a power averaging Flywheel Battery for use on high speed passenger train

  • permanent magnet bias homopolar magnetic bearings for a 130 kw hr composite Flywheel
    2004
    Co-Authors: Brian T. Murphy, Matthew T. Caprio, A Ouroua, John D. Herbst
    Abstract:

    The Center for Electromechanics at the University of Texas at Austin is developing a power averaging Flywheel Battery for a high speed passenger locomotive as part of the Federal Railroad Administration’s Next Generation High Speed Rail Program. The Flywheel rotor, which weighs 5100 lb, is designed to store 130 kW-hr of energy at a top design speed of 15,000 rpm. The vertical rotor, which runs in a vacuum, is supported by a 5 axis magnetic bearing system. The Flywheel housing is gimbal mounted to isolate the vehicle chassis from the gyroscopic forces in this dynamic application. A high speed 2 MW motor-generator, which is outside the vacuum, is directly coupled to the Flywheel with the use of a rotary vacuum seal. This paper discusses the design of the magnetic bearing actuators. There are two identical radial bearings and a double acting thrust bearing, each employing permanent magnet homopolar bias fields coupled with active control coils. The bearings employ permanent magnet homopolar bias fields. Some electromagnetic design analysis of the actuators is presented, along with test results for static electromagnetic fields measured within the bearing air gaps. Measured hysteresis loss in the radial bearing laminations is also presented. Analytical estimates of actuator bandwidth are compared to measurements. A preliminary build of the Flywheel rotor (the design of which is discussed in a companion paper) has been successfully spin tested to 13,600 rpm with the use of a digital bearing controller. Performance of the position sensors, fiber optic for radial and eddy current for axial, has thus far been adequate.

R Okou - One of the best experts on this subject based on the ideXlab platform.

  • The potential impact of small-scale Flywheel energy storage technology on Uganda’s energy sector
    University of Cape Town, 2017
    Co-Authors: R Okou, A B Sebitosi, Azeem Khan, Pragasen Pillay
    Abstract:

    The energy crisis in Uganda has caused a sharp decline in the growth of the industry sector from 10.8% to 4.5% between 2004/5 and 2005/6. This crisis has escalated the power disruptions, which have had adverse effects on various sectors. While business owners have resorted to importation of fossil fuel generators that have increased the cost of production, others have resorted to Battery energy storage systems to cater for short outages, which are limited in life span, depth of discharge, among others. These interventions have, thus, further in-creased the cost of goods and services. In addition, the rural populations using solar home systems incur high Battery maintenance and replacement costs. In this paper an electromechanical Flywheel Battery is proposed as a better alternative in mitigating energy storage problems. It is found that by replacing the Battery storage systems with the electromechanical Flywheel Battery, a saving of up to 35% on cost of energy can be made in the solar home systems and for the industry sector, the power disruptions could be reduced

  • the potential impact of small scale Flywheel energy storage technology on uganda s energy sector
    Journal of Energy in Southern Africa, 2009
    Co-Authors: R Okou, A B Sebitosi, Azeem Khan, Pragasen Pillay
    Abstract:

    The energy crisis in Uganda has caused a sharp decline in the growth of the industry sector from 10.8% to 4.5% between 2004/5 and 2005/6. This crisis has escalated the power disruptions, which have had adverse effects on various sectors. While business owners have resorted to importation of fossil fuel generators that have increased the cost of production, others have resorted to Battery energy storage systems to cater for short outages, which are limited in life span, depth of discharge, among others. These interventions have, thus, further increased the cost of goods and services. In addition, the rural populations using solar home systems incur high Battery maintenance and replacement costs. In this paper an electromechanical Flywheel Battery is proposed as a better alternative in mitigating energy storage problems. It is found that by replacing the Battery storage systems with the electromechanical Flywheel Battery, a saving of up to 35% on cost of energy can be made in the solar home systems and for the industry sector, the power disruptions could be reduced.

Matthew T. Caprio - One of the best experts on this subject based on the ideXlab platform.

  • as part of the Federal Railroad Administration’s Next
    2014
    Co-Authors: Brian T. Murphy, Hamid Ouroua, Matthew T. Caprio, John D. Herbst
    Abstract:

    The Center for Electromechanics at the University of Texas at Austin is developing a power averaging Flywheel Battery for a high speed passenger locomotiv

  • as part of the Federal Railroad Administration’s Next
    2014
    Co-Authors: Matthew T. Caprio, Brian T. Murphy, John D. Herbst
    Abstract:

    The Center for Electromechanics at the University of Texas at Austin is developing a power averaging Flywheel Battery for use on high speed passenger train

  • permanent magnet bias homopolar magnetic bearings for a 130 kw hr composite Flywheel
    2004
    Co-Authors: Brian T. Murphy, Matthew T. Caprio, A Ouroua, John D. Herbst
    Abstract:

    The Center for Electromechanics at the University of Texas at Austin is developing a power averaging Flywheel Battery for a high speed passenger locomotive as part of the Federal Railroad Administration’s Next Generation High Speed Rail Program. The Flywheel rotor, which weighs 5100 lb, is designed to store 130 kW-hr of energy at a top design speed of 15,000 rpm. The vertical rotor, which runs in a vacuum, is supported by a 5 axis magnetic bearing system. The Flywheel housing is gimbal mounted to isolate the vehicle chassis from the gyroscopic forces in this dynamic application. A high speed 2 MW motor-generator, which is outside the vacuum, is directly coupled to the Flywheel with the use of a rotary vacuum seal. This paper discusses the design of the magnetic bearing actuators. There are two identical radial bearings and a double acting thrust bearing, each employing permanent magnet homopolar bias fields coupled with active control coils. The bearings employ permanent magnet homopolar bias fields. Some electromagnetic design analysis of the actuators is presented, along with test results for static electromagnetic fields measured within the bearing air gaps. Measured hysteresis loss in the radial bearing laminations is also presented. Analytical estimates of actuator bandwidth are compared to measurements. A preliminary build of the Flywheel rotor (the design of which is discussed in a companion paper) has been successfully spin tested to 13,600 rpm with the use of a digital bearing controller. Performance of the position sensors, fiber optic for radial and eddy current for axial, has thus far been adequate.