The Experts below are selected from a list of 3153 Experts worldwide ranked by ideXlab platform

William P. Krol - One of the best experts on this subject based on the ideXlab platform.

  • Application of a high-energy-density permanent magnet material in underwater systems
    Journal of Materials Engineering and Performance, 1996
    Co-Authors: C. Peter Cho, C. Egan, William P. Krol
    Abstract:

    This paper addresses the application of high-energy-density permanent magnet (PM) technology to (1) the brushless, axial-field PM Motor and (2) the integrated Electric Motor/Pump system for under-water applications. Finite-element analysis and lumped parameter magnetic circuit analysis were used to calculate Motor parameters and performance characteristics and to conduct tradeoff studies. Compact, efficient, reliable, and quiet underwater systems are attainable with the development of high-energy-density PM material, power electronic devices, and power integrated-circuit technology.

  • FEASIBILITY STUDY OF A NOVEL INTEGRATED Electric Motor/Pump FOR UNDERWATER APPLICATIONS
    Naval Engineers Journal, 1996
    Co-Authors: C. Peter Cho, William P. Krol
    Abstract:

    This paper presents the results of a feasibility study of a novel Electric Motor/Pump system that combines an axial field, permanent magnet Motor with a centrifugal Pump. This system, unique because the Motor permanent magnet (PM) rotor and Pump impeller vanes are a single unit, provides a compact, reliable, low-noise, and high-power-density Electrically driven centrifugal Pump suitable for underwater applications in which minimizing noise, vibration, and volume are major design objectives. Performance tradeoffs for the electromagnetic analysis were made by two- and three-dimensional finite element analysis (FEA) models in conjunction with a lumped parameter magnetic circuit model. The study results reveal that theoretically the new integrated Electric Motor/Pump concept (1) provides up to seventy-three percent electromagnetic efficiency with a significantly reduced volume and weight and (2) substantially increases the power density and reliability with the potential for quiet and high performance. This study is also evidence that new concepts can be explored with expanded computer modeling and simulation techniques.

  • High energy density permanent magnetic Motors for underwater systems
    Proceedings of Symposium on Autonomous Underwater Vehicle Technology, 1
    Co-Authors: William P. Krol, C. Peter Cho
    Abstract:

    This paper addresses the application of high energy density, permanent magnet technology to (1) the brushless, axial field, permanent magnet Motor, and (2) the integrated Electric Motor/Pump impeller system for underwater applications. Finite element analysis (FEA) and lumped parameter magnetic circuit models were developed and used to calculate the Motor parameters and performance characteristics. New compact, efficient, reliable, and quiet underwater systems are attainable due to advances in high energy density permanent magnets, power electronic devices, and power integrated circuit technology.

C. Peter Cho - One of the best experts on this subject based on the ideXlab platform.

  • Application of a high-energy-density permanent magnet material in underwater systems
    Journal of Materials Engineering and Performance, 1996
    Co-Authors: C. Peter Cho, C. Egan, William P. Krol
    Abstract:

    This paper addresses the application of high-energy-density permanent magnet (PM) technology to (1) the brushless, axial-field PM Motor and (2) the integrated Electric Motor/Pump system for under-water applications. Finite-element analysis and lumped parameter magnetic circuit analysis were used to calculate Motor parameters and performance characteristics and to conduct tradeoff studies. Compact, efficient, reliable, and quiet underwater systems are attainable with the development of high-energy-density PM material, power electronic devices, and power integrated-circuit technology.

  • FEASIBILITY STUDY OF A NOVEL INTEGRATED Electric Motor/Pump FOR UNDERWATER APPLICATIONS
    Naval Engineers Journal, 1996
    Co-Authors: C. Peter Cho, William P. Krol
    Abstract:

    This paper presents the results of a feasibility study of a novel Electric Motor/Pump system that combines an axial field, permanent magnet Motor with a centrifugal Pump. This system, unique because the Motor permanent magnet (PM) rotor and Pump impeller vanes are a single unit, provides a compact, reliable, low-noise, and high-power-density Electrically driven centrifugal Pump suitable for underwater applications in which minimizing noise, vibration, and volume are major design objectives. Performance tradeoffs for the electromagnetic analysis were made by two- and three-dimensional finite element analysis (FEA) models in conjunction with a lumped parameter magnetic circuit model. The study results reveal that theoretically the new integrated Electric Motor/Pump concept (1) provides up to seventy-three percent electromagnetic efficiency with a significantly reduced volume and weight and (2) substantially increases the power density and reliability with the potential for quiet and high performance. This study is also evidence that new concepts can be explored with expanded computer modeling and simulation techniques.

  • A novel integrated Electric Motor/Pump for underwater applications
    Journal of Applied Physics, 1996
    Co-Authors: C. Peter Cho, Barry K. Fussell, John Y. Hung
    Abstract:

    This article presents a novel Electric Motor/Pump system that combines an axial field, permanent magnet Motor with a centrifugal Pump. This system, unique because the Motor permanent magnet rotor and Pump impeller vanes are a single unit, provides a compact, reliable, low‐noise, and high‐power density Electrically driven centrifugal Pump suitable for underwater applications in which minimizing noise, vibration, and volume are major design objectives. Performance tradeoffs for the electromagnetic analysis were made by three‐dimensional finite element analysis models in conjunction with a lumped parameter magnetic circuit model.

  • High energy density permanent magnetic Motors for underwater systems
    Proceedings of Symposium on Autonomous Underwater Vehicle Technology, 1
    Co-Authors: William P. Krol, C. Peter Cho
    Abstract:

    This paper addresses the application of high energy density, permanent magnet technology to (1) the brushless, axial field, permanent magnet Motor, and (2) the integrated Electric Motor/Pump impeller system for underwater applications. Finite element analysis (FEA) and lumped parameter magnetic circuit models were developed and used to calculate the Motor parameters and performance characteristics. New compact, efficient, reliable, and quiet underwater systems are attainable due to advances in high energy density permanent magnets, power electronic devices, and power integrated circuit technology.

N Ertugrul - One of the best experts on this subject based on the ideXlab platform.

  • assessing variable speed Pump efficiency in water distribution systems
    Drinking Water Engineering and Science, 2012
    Co-Authors: Angela Marchi, Angus R Simpson, N Ertugrul
    Abstract:

    Abstract. Energy savings and greenhouse gas emission reductions are increasingly becoming important design targets in many industrial systems where fossil fuel based Electrical energy is heavily utilised. In water distribution systems (WDSs) a significant portion of operational cost is related to Pumping. Recent studies have considered variable speed Pumps (VSPs) which aim to vary the operating point of the Pump to match demand to Pumping rate. Depending on the system characteristics, this approach can lead to considerable savings in operational costs. In particular, cost reductions can take advantage of the demand variability and can decrease energy consumption significantly. One of the issues in using variable speed Pumping systems, however, is the total efficiency of the Electric Motor/Pump arrangement under a given operating condition. This paper aims to provide a comprehensive discussion about the components of WDS that incorporate variable speed Pumps (including Electric Motors, variable frequency drives and the Pumps themselves) to provide an insight of ways of increasing the system efficiency and hence to reduce energy consumption. In addition, specific attention is given to selection of Motor types, sizing, duty cycle of Pump (ratio of on-time and time period), losses due to installation and Motor faults. All these factors affect the efficiency of Motor drive/Pump system.

  • assessing variable speed Pump efficiency in water distribution systems
    Drinking Water Engineering and Science, 2012
    Co-Authors: Angela Marchi, Angus R Simpson, N Ertugrul
    Abstract:

    Abstract. Energy savings and greenhouse gas emission reductions are increasingly becoming important design targets in many industrial systems where fossil fuel based Electrical energy is heavily utilised. In water distribution systems (WDSs) a significant portion of operational cost is related to Pumping. Recent studies have considered variable speed Pumps (VSPs) which aim to vary the operating point of the Pump to match demand to Pumping rate. Depending on the system characteristics, this approach can lead to considerable savings in operational costs. In particular, cost reductions can take advantage of the demand variability and can decrease energy consumption significantly. One of the issues in using variable speed Pumping systems, however, is the total efficiency of the Electric Motor/Pump arrangement under a given operating condition. This paper aims to provide a comprehensive discussion about the components of WDS that incorporate variable speed Pumps (including Electric Motors, variable frequency drives and the Pumps themselves) to provide an insight of ways of increasing the system efficiency and hence to reduce energy consumption. In addition, specific attention is given to selection of Motor types, sizing, duty cycle of Pump (ratio of on-time and time period), losses due to installation and Motor faults. All these factors affect the efficiency of Motor drive/Pump system.

  • Assessing variable speed Pump efficiency in water distribution systems
    Drinking Water Engineering and Science Discussions, 2012
    Co-Authors: Angela Marchi, Angus R Simpson, N Ertugrul
    Abstract:

    Abstract. Energy savings and greenhouse gas emission reductions are increasingly becoming important design targets in many industrial systems where fossil fuel based Electrical energy is heavily utilised. In water distribution systems (WDSs) a significant portion of operational cost is related to Pumping. Recent studies have considered variable speed Pumps (VSPs) which aim to vary the operating point of the Pump to match demand to Pumping rate. Depending on the system characteristics, this approach can lead to considerable savings in operational costs. In particular, cost reductions can take advantage of the demand variability and can decrease energy consumption significantly. One of the issues in using variable speed Pumping systems, however, is the total efficiency of the Electric Motor/Pump arrangement under a given operating condition. This paper aims to provide a comprehensive discussion about the components of WDS that incorporate variable speed Pumps (including Electric Motors, inverters and the Pumps themselves) to provide an insight of ways of increasing the system efficiency and hence to reduce energy consumption. In addition, specific attention is given to selection of Motor types, sizing, duty cycle of Pump (ratio of on-time and time period), losses due to installation and Motor faults. All these factors affect the efficiency of Motor drive/Pump system.

Angela Marchi - One of the best experts on this subject based on the ideXlab platform.

  • assessing variable speed Pump efficiency in water distribution systems
    Drinking Water Engineering and Science, 2012
    Co-Authors: Angela Marchi, Angus R Simpson, N Ertugrul
    Abstract:

    Abstract. Energy savings and greenhouse gas emission reductions are increasingly becoming important design targets in many industrial systems where fossil fuel based Electrical energy is heavily utilised. In water distribution systems (WDSs) a significant portion of operational cost is related to Pumping. Recent studies have considered variable speed Pumps (VSPs) which aim to vary the operating point of the Pump to match demand to Pumping rate. Depending on the system characteristics, this approach can lead to considerable savings in operational costs. In particular, cost reductions can take advantage of the demand variability and can decrease energy consumption significantly. One of the issues in using variable speed Pumping systems, however, is the total efficiency of the Electric Motor/Pump arrangement under a given operating condition. This paper aims to provide a comprehensive discussion about the components of WDS that incorporate variable speed Pumps (including Electric Motors, variable frequency drives and the Pumps themselves) to provide an insight of ways of increasing the system efficiency and hence to reduce energy consumption. In addition, specific attention is given to selection of Motor types, sizing, duty cycle of Pump (ratio of on-time and time period), losses due to installation and Motor faults. All these factors affect the efficiency of Motor drive/Pump system.

  • assessing variable speed Pump efficiency in water distribution systems
    Drinking Water Engineering and Science, 2012
    Co-Authors: Angela Marchi, Angus R Simpson, N Ertugrul
    Abstract:

    Abstract. Energy savings and greenhouse gas emission reductions are increasingly becoming important design targets in many industrial systems where fossil fuel based Electrical energy is heavily utilised. In water distribution systems (WDSs) a significant portion of operational cost is related to Pumping. Recent studies have considered variable speed Pumps (VSPs) which aim to vary the operating point of the Pump to match demand to Pumping rate. Depending on the system characteristics, this approach can lead to considerable savings in operational costs. In particular, cost reductions can take advantage of the demand variability and can decrease energy consumption significantly. One of the issues in using variable speed Pumping systems, however, is the total efficiency of the Electric Motor/Pump arrangement under a given operating condition. This paper aims to provide a comprehensive discussion about the components of WDS that incorporate variable speed Pumps (including Electric Motors, variable frequency drives and the Pumps themselves) to provide an insight of ways of increasing the system efficiency and hence to reduce energy consumption. In addition, specific attention is given to selection of Motor types, sizing, duty cycle of Pump (ratio of on-time and time period), losses due to installation and Motor faults. All these factors affect the efficiency of Motor drive/Pump system.

  • Assessing variable speed Pump efficiency in water distribution systems
    Drinking Water Engineering and Science Discussions, 2012
    Co-Authors: Angela Marchi, Angus R Simpson, N Ertugrul
    Abstract:

    Abstract. Energy savings and greenhouse gas emission reductions are increasingly becoming important design targets in many industrial systems where fossil fuel based Electrical energy is heavily utilised. In water distribution systems (WDSs) a significant portion of operational cost is related to Pumping. Recent studies have considered variable speed Pumps (VSPs) which aim to vary the operating point of the Pump to match demand to Pumping rate. Depending on the system characteristics, this approach can lead to considerable savings in operational costs. In particular, cost reductions can take advantage of the demand variability and can decrease energy consumption significantly. One of the issues in using variable speed Pumping systems, however, is the total efficiency of the Electric Motor/Pump arrangement under a given operating condition. This paper aims to provide a comprehensive discussion about the components of WDS that incorporate variable speed Pumps (including Electric Motors, inverters and the Pumps themselves) to provide an insight of ways of increasing the system efficiency and hence to reduce energy consumption. In addition, specific attention is given to selection of Motor types, sizing, duty cycle of Pump (ratio of on-time and time period), losses due to installation and Motor faults. All these factors affect the efficiency of Motor drive/Pump system.

Jiming Zhang - One of the best experts on this subject based on the ideXlab platform.

  • Rotational speed characteristic of rotor immersed in oil within an Electric Motor-Pump
    2015 International Conference on Fluid Power and Mechatronics (FPM), 2015
    Co-Authors: Jinlin Wang, Hong Ji, Wei Ren, Jiming Zhang
    Abstract:

    Aimed at the decline of the rotational speed of rotor in an 11 kW Electric Motor-Pump prototype, the rotational speed characteristic is calculated by means of experiments, theoretical calculations and RMxprt module of Ansoft software. The study shows that viscosity load, which mainly contains air gap and sealing gap, causes the on-load starting, and affects the decline of the rotational speed to some extent. The power loss caused by the viscosity load is 1.185 kW when the oil temperature is 31t, and the power loss decreases rapidly with the increase of oil temperature. Squirrel-cage resistance has a much impact on the rotational speed. The rotational speed and the total power of the Electric Motor-Pump prototype can be improved by adopting squirrel-cage rotor's material with lower resistivity and enlarging the diameter of the rotor-bar and the end-ring.

  • Performance test and analysis of the prototype of the Electric Motor-Pump
    Proceedings of the Institution of Mechanical Engineers Part C: Journal of Mechanical Engineering Science, 2014
    Co-Authors: Ji Hong, Jinlin Wang, Wang Wenlu, Jiming Zhang
    Abstract:

    An Electric Motor-Pump prototype with compact structure has been developed, and a testing system for the prototype has been established to obtain testing data, such as noise, efficiency, and rotational speed. Compared with the performance of the Electric-hydraulic power unit, the noise level of the prototype maximally decreases by 13.4 dB, the volumetric efficiency is nearly 1.3% higher during the delivery pressure rising from 0 MPa to 15 MPa. However, the total efficiency of the prototype is 4.9% lower due to the lower rotational speed and the oil-immersed loss. Aiming at the noise abatement and the decline in efficiency, CFD and Ansoft are used to analyze the suction flow field of main Pump and the rotational speed, and then the key factors that impact on noise and efficiency of the prototype are presented. The research results show that adopting the charging effect measure, setting a centrifugal charging Pump at the inlet of the main Pump, can prevent the cavitation noise caused by insufficient oil suc...