The Experts below are selected from a list of 324 Experts worldwide ranked by ideXlab platform

Enrique C. Quispe - One of the best experts on this subject based on the ideXlab platform.

  • Implementation of a Procedure to Determine Induction Motor Efficiency According to the IEC 60034-2-1 Standard
    2018 IEEE ANDESCON, 2018
    Co-Authors: Rogger I. Rivera, Tálaga C. Joyman, Castrillón M. Rosaura, Enrique C. Quispe
    Abstract:

    This paper presents the development of two procedures to determine induction Motor Efficiency according to the IEC 60034 2-1 standard. In first instance, with the Motor at environment temperature, the Efficiency is calculate by the direct measurement method (method 2-1-1A). Then keeping the Motor at full load, it is operating until the thermal equilibrium, in this moment the Efficiency is determinate by direct method. Finally, the method of separation of losses is implemented (method 2-1-1B), which requires more analysis in order to obtaining the different types of losses according its nature.

  • Procedure for Determining Induction Motor Efficiency Working Under Distorted Grid Voltages
    IEEE Transactions on Energy Conversion, 2015
    Co-Authors: Vladimir Sousa Santos, Percy Viego R. Felipe, Julio Gómez R. Sarduy, Norberto A. Lemozy, Alejandro Jurado, Enrique C. Quispe
    Abstract:

    In electric power systems, it is very common to find problems of power quality. The flow of harmonics significantly affect the operation of three-phase induction Motors, and its energy characterization becomes difficult. There are different methods in situ to estimate Motor Efficiency. However, it is necessary to deepen the in situ Efficiency analysis under nonsinusoidal voltage conditions. In this paper, a procedure is presented based on the equivalent circuits with losses segregation and using a bacterial foraging algorithm (BFA). It allows induction Motors' energy Efficiency determination in field conditions with low invasiveness and working under harmonic distortion. The method was successfully tested on a 1.5 kW Motor fed with significant levels of voltage harmonic.

Vusumuzi Dlamini - One of the best experts on this subject based on the ideXlab platform.

  • An Improved Non-Intrusive Induction Motor Efficiency Estimation Technique for Non-Ideal Supply Voltage Conditions
    Electric Power Components and Systems, 2018
    Co-Authors: Vusumuzi Dlamini, Ramesh C. Bansal, Robin Naidoo
    Abstract:

    AbstractMethods of accurately determining the Efficiency of Motors in situ without costly plant downtime are required to implement online Motor management strategies that can lead to energy and cost savings. An ideal method must perform in practical power system conditions where there is variation in the supply voltage. An improved non-intrusive compensated slip technique utilising vibration signature analysis has been proposed for accurately estimating induction Motor Efficiency. The performance of this technique is evaluated through experimental data under ideal and non-ideal supply voltage conditions. The proposed method of estimating Motor Efficiency is found to be accurate and easy to implement. The proposed technique is robust in under-voltage and over-voltage power supply conditions.

  • An improved Motor replacement strategy using non-intrusive Motor Efficiency estimation
    2014 International Conference on the Eleventh industrial and Commercial Use of Energy, 2014
    Co-Authors: Vusumuzi Dlamini, Ramesh C. Bansal, Robin Naidoo
    Abstract:

    With increasing energy costs and a renewed focus on using energy in ways that support the environment, a structured approach is required to ensure that energy is used efficiently. Knowing the Efficiency of installed Motors is essential for effective Motor energy management. The Efficiency data can be used in the identification of opportunities for improving energy Efficiency by replacing inefficient Motors with high-Efficiency Motors and improving the Motor-driven processes. In this paper, a non-invasive technique for estimating the Efficiency of in-service induction Motors without process interruption is presented. The Motor Efficiency is estimated using the non-intrusive compensated slip method. The accuracy of this technique is verified through experimental data. A comprehensive Motor replacement strategy to reduce Motor life cycle costs while increasing reliability is proposed. The application of energy management principles is combined with benefits that can be obtained from using energy-efficient Motors. Tools for the economic analysis of the potential financial benefits of replacing Motors with energy efficient Motors are developed. The strategy presented incorporates benefits that can be obtained from using in-situ Motor Efficiency estimation. The replacement Motor can be compared to the installed Motor using the actual Efficiency across the load profile for the application for which the Motor is used. A case study of the application of the strategy is presented.

  • A non-intrusive method for estimating Motor Efficiency using vibration signature analysis
    International Journal of Electrical Power & Energy Systems, 2013
    Co-Authors: Vusumuzi Dlamini, Robin Naidoo, M. Manyage
    Abstract:

    Abstract An accurate method of estimating the Efficiency of in-service Motors is needed in order to determine the performance of installed Motors without disrupting the Motor driven process. In this paper, the Motor Efficiency is estimated using a non-intrusive implementation of the compensated slip method. The Motor speed is accurately estimated using Motor vibration signature analysis. A few other Efficiency estimation techniques are implemented and their performance is compared to the proposed method. It was found that the non-intrusive compensated slip method produced relatively accurate results without having an adverse impact on the availability of the Motor under test. This method provides an attractive alternative to highly intrusive techniques that offer similar accuracy.

  • A non-intrusive compensated slip method for Motor Efficiency estimation using vibration signature analysis
    IEEE Africon '11, 2011
    Co-Authors: Vusumuzi Dlamini, Robin Naidoo, M. Manyage
    Abstract:

    An accurate method of estimating the Efficiency of in-service Motors is needed in order to determine the performance of installed Motors without disrupting the Motor driven process. In this paper, the Motor Efficiency is estimated using a non-intrusive implementation of the compensated slip method. The Motor speed is accurately estimated using Motor vibration signature analysis. A few other Efficiency estimation techniques are implemented and their performance is compared to the proposed method. It was found that the non-intrusive compensated slip method produced relatively accurate results without having an adverse impact on the availability of the Motor under test. This method provides an attractive alternative to highly intrusive techniques that offer similar accuracy.

Robin Naidoo - One of the best experts on this subject based on the ideXlab platform.

  • An Improved Non-Intrusive Induction Motor Efficiency Estimation Technique for Non-Ideal Supply Voltage Conditions
    Electric Power Components and Systems, 2018
    Co-Authors: Vusumuzi Dlamini, Ramesh C. Bansal, Robin Naidoo
    Abstract:

    AbstractMethods of accurately determining the Efficiency of Motors in situ without costly plant downtime are required to implement online Motor management strategies that can lead to energy and cost savings. An ideal method must perform in practical power system conditions where there is variation in the supply voltage. An improved non-intrusive compensated slip technique utilising vibration signature analysis has been proposed for accurately estimating induction Motor Efficiency. The performance of this technique is evaluated through experimental data under ideal and non-ideal supply voltage conditions. The proposed method of estimating Motor Efficiency is found to be accurate and easy to implement. The proposed technique is robust in under-voltage and over-voltage power supply conditions.

  • An improved Motor replacement strategy using non-intrusive Motor Efficiency estimation
    2014 International Conference on the Eleventh industrial and Commercial Use of Energy, 2014
    Co-Authors: Vusumuzi Dlamini, Ramesh C. Bansal, Robin Naidoo
    Abstract:

    With increasing energy costs and a renewed focus on using energy in ways that support the environment, a structured approach is required to ensure that energy is used efficiently. Knowing the Efficiency of installed Motors is essential for effective Motor energy management. The Efficiency data can be used in the identification of opportunities for improving energy Efficiency by replacing inefficient Motors with high-Efficiency Motors and improving the Motor-driven processes. In this paper, a non-invasive technique for estimating the Efficiency of in-service induction Motors without process interruption is presented. The Motor Efficiency is estimated using the non-intrusive compensated slip method. The accuracy of this technique is verified through experimental data. A comprehensive Motor replacement strategy to reduce Motor life cycle costs while increasing reliability is proposed. The application of energy management principles is combined with benefits that can be obtained from using energy-efficient Motors. Tools for the economic analysis of the potential financial benefits of replacing Motors with energy efficient Motors are developed. The strategy presented incorporates benefits that can be obtained from using in-situ Motor Efficiency estimation. The replacement Motor can be compared to the installed Motor using the actual Efficiency across the load profile for the application for which the Motor is used. A case study of the application of the strategy is presented.

  • A non-intrusive method for estimating Motor Efficiency using vibration signature analysis
    International Journal of Electrical Power & Energy Systems, 2013
    Co-Authors: Vusumuzi Dlamini, Robin Naidoo, M. Manyage
    Abstract:

    Abstract An accurate method of estimating the Efficiency of in-service Motors is needed in order to determine the performance of installed Motors without disrupting the Motor driven process. In this paper, the Motor Efficiency is estimated using a non-intrusive implementation of the compensated slip method. The Motor speed is accurately estimated using Motor vibration signature analysis. A few other Efficiency estimation techniques are implemented and their performance is compared to the proposed method. It was found that the non-intrusive compensated slip method produced relatively accurate results without having an adverse impact on the availability of the Motor under test. This method provides an attractive alternative to highly intrusive techniques that offer similar accuracy.

  • A non-intrusive compensated slip method for Motor Efficiency estimation using vibration signature analysis
    IEEE Africon '11, 2011
    Co-Authors: Vusumuzi Dlamini, Robin Naidoo, M. Manyage
    Abstract:

    An accurate method of estimating the Efficiency of in-service Motors is needed in order to determine the performance of installed Motors without disrupting the Motor driven process. In this paper, the Motor Efficiency is estimated using a non-intrusive implementation of the compensated slip method. The Motor speed is accurately estimated using Motor vibration signature analysis. A few other Efficiency estimation techniques are implemented and their performance is compared to the proposed method. It was found that the non-intrusive compensated slip method produced relatively accurate results without having an adverse impact on the availability of the Motor under test. This method provides an attractive alternative to highly intrusive techniques that offer similar accuracy.

Tiew On Ting - One of the best experts on this subject based on the ideXlab platform.

  • ITSC - Partial speed trajectory optimization for urban rail vehicles with considerations on Motor Efficiency
    2017 IEEE 20th International Conference on Intelligent Transportation Systems (ITSC), 2017
    Co-Authors: Shaofeng Lu, Jie Yang, Tiew On Ting
    Abstract:

    Among different Efficiency-enhancing techniques on railway traction energy, speed trajectory optimization is regarded as a promising and feasible method as it requires no further upgrade on the railway infrastructures. This paper focuses on a special speed trajectory optimization problem for urban railway transportation, in which the train is required to alter its speed from one to another either by traction or regenerative braking within the time and distance constraints. Previous papers in this area propose a comprehensive Mixed Integer Linear Programming (MILP) model to solve this problem considering route gradients and speed limits etc. Further to the previous work, this paper tries to contribute in two aspects. First, this paper explicitly proves the rationality of the assumption of monotonicity of the speeds during the speed-changing process using Pontriyagin's Maximum Principle with some basic assumptions for engineering applications. Second, this paper proposes an improved optimization model which takes into account the Motor Efficiency during traction and braking. Optimization results verify and demonstrate the significant impact of the Motor Efficiency on energy saving.

  • Partial speed trajectory optimization for urban rail vehicles with considerations on Motor Efficiency
    2017 IEEE 20th International Conference on Intelligent Transportation Systems (ITSC), 2017
    Co-Authors: Shaofeng Lu, Jie Yang, Tiew On Ting
    Abstract:

    Among different Efficiency-enhancing techniques on railway traction energy, speed trajectory optimization is regarded as a promising and feasible method as it requires no further upgrade on the railway infrastructures. This paper focuses on a special speed trajectory optimization problem for urban railway transportation, in which the train is required to alter its speed from one to another either by traction or regenerative braking within the time and distance constraints. Previous papers in this area propose a comprehensive Mixed Integer Linear Programming (MILP) model to solve this problem considering route gradients and speed limits etc. Further to the previous work, this paper tries to contribute in two aspects. First, this paper explicitly proves the rationality of the assumption of monotonicity of the speeds during the speed-changing process using Pontriyagin's Maximum Principle with some basic assumptions for engineering applications. Second, this paper proposes an improved optimization model which takes into account the Motor Efficiency during traction and braking. Optimization results verify and demonstrate the significant impact of the Motor Efficiency on energy saving.

Vladimir Sousa Santos - One of the best experts on this subject based on the ideXlab platform.

  • Procedure for Determining Induction Motor Efficiency Working Under Distorted Grid Voltages
    IEEE Transactions on Energy Conversion, 2015
    Co-Authors: Vladimir Sousa Santos, Percy Viego R. Felipe, Julio Gómez R. Sarduy, Norberto A. Lemozy, Alejandro Jurado, Enrique C. Quispe
    Abstract:

    In electric power systems, it is very common to find problems of power quality. The flow of harmonics significantly affect the operation of three-phase induction Motors, and its energy characterization becomes difficult. There are different methods in situ to estimate Motor Efficiency. However, it is necessary to deepen the in situ Efficiency analysis under nonsinusoidal voltage conditions. In this paper, a procedure is presented based on the equivalent circuits with losses segregation and using a bacterial foraging algorithm (BFA). It allows induction Motors' energy Efficiency determination in field conditions with low invasiveness and working under harmonic distortion. The method was successfully tested on a 1.5 kW Motor fed with significant levels of voltage harmonic.