The Experts below are selected from a list of 80121 Experts worldwide ranked by ideXlab platform
Gérard André Capolino - One of the best experts on this subject based on the ideXlab platform.
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planetary gearbox Torsional Vibration effects on wound rotor induction generator electrical signatures
IEEE Transactions on Industry Applications, 2016Co-Authors: Mohammad Hoseintaba Marzebali, Shahin Hedayati Kia, Gérard André Capolino, Humberto Henao, Jawad FaizAbstract:In this paper, Torsional Vibration effects of a planetary gearbox on electrical signatures of a wound-rotor induction generator have been studied in a representative complex electromechanical system through both numerical simulations and experiments. A universal lumped-parameter model has been developed with consideration of impacts of main drive-train mechanical components. This model has been adapted to a reduced-scale wind turbine simulator based on a 5.5-kW three-phase wound-rotor induction generator used for experimental validation at different load conditions. For this system, it has been demonstrated that most of mechanical characteristic frequencies of the planetary gearbox are difficult to be identified in the stator current spectrum. Nevertheless, the proposed approach has been used as an initial stage to assess the effectiveness of noninvasive condition monitoring of a planetary gearbox based on electrical signatures analysis.
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planetary gearbox Torsional Vibration effects on wound rotor induction generator electrical signatures
International Electric Machines and Drives Conference, 2015Co-Authors: Mohammad Hoseintaba Marzebali, Shahin Hedayati Kia, Gérard André Capolino, Humberto Henao, Jawad FaizAbstract:Recently, alternative non-invasive methods based on electrical signature analysis have been proposed as an effective, easy and cheap way for electrical and mechanical faults detection in complex electromechanical systems such as wind turbines and traction systems. This paper aims to study the Torsional Vibration effects of a planetary gearbox which is a vital component of wind turbines on the electrical signatures of a wound rotor induction generator through both numerical simulations and experiments. A lumped model of planetary gearbox which needs minimum number of mechanical parameters is linked to the classical model of wound rotor induction generator in abc reference frame. The numerical simulation results show that some of mechanical characteristic frequencies of the planetary gearbox can be identified in the electromagnetic torque and stator current signatures of wound rotor induction generator. A reduced scale wind turbine simulator based on a 5.5 kW wound rotor induction generator is used for experimental verification of the proposed model at different working conditions.
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Torsional-Vibration assessment and gear-fault diagnosis in railway traction system
IEEE Transactions on Industrial Electronics, 2011Co-Authors: Humberto Henao, Shahin Hedayati Kia, Gérard André CapolinoAbstract:The diagnosis of mechanical faults in railway traction systems (RTSs) has a significant importance on both safety and reliability, which can avoid train crashes. This papaer deals with Torsional-Vibration assessment and gear-fault diagnosis in the mechanical transmission of a high-speed RTS by a fully noninvasive technique. Previous studies on a simple gearbox-based electromechanical system have shown that the influence of gearbox Torsional Vibrations on the torque and on the stator-current signatures are obvious. The aim of this paper is to demonstrate that the traction motor can be considered as a torque sensor through its electromagnetic-torque estimation for TorsionalVibration monitoring without any extra mechanical sensor. The effects of both tooth-damage and surface-wear faults at the output wheel on the stator current and on the estimated electromagnetic torque have been investigated. The results of the estimation are compared with the measured mechanical torque and validated through a reduced-scale RTS in both stationary and nonstationary conditions.
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Torsional Vibration assessment using induction machine electromagnetic torque estimation
IEEE Transactions on Industrial Electronics, 2010Co-Authors: Shahin Hedayati Kia, Humberto Henao, Gérard André CapolinoAbstract:Mechanical anomalies such as load troubles, great torque dynamic variations, and Torsional oscillations result in the shaft fatigue of electrical machine and other mechanical parts such as bearings and gearboxes. Particularly, the Torsional Vibration may attain a significant level at resonant frequencies which damage or cause additional lifetime consumption of mechanical parts. In this way, this paper proposes a noninvasive technique through the electromagnetic torque estimation of driving induction machine as a mean of mechanical Torsional stresses monitoring. The lubrication loss is considered as a gear failure to demonstrate its influence on the Vibration and on the electromagnetic estimated torque signatures. Then, it is shown that the information in the electromagnetic torque can be decomposed into high- and low-frequency bandwidths which are associated to induction machine and gearbox mechanical-related frequencies, respectively. A setup based on a 5.5-kW three-phase squirrel-cage induction motor connected to a 4-kW wound-rotor induction generator via a one-stage gearbox has been used to validate the proposed method in both stationary and nonstationary conditions.
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Torsional Vibration effects on induction machine current and torque signatures in gearbox based electromechanical system
IEEE Transactions on Industrial Electronics, 2009Co-Authors: Humberto Henao, Gérard André CapolinoAbstract:The monitoring of heavy-duty electromechanical systems is crucial for their preventive maintenance planning. In these systems, the mechanical anomalies such as load troubles, great torque dynamic variations, and Torsional oscillations lead to shaft fatigue and aging of other mechanical parts such as bearings and gearboxes. In this paper, a gearbox-based electromechanical system is investigated. Initially, a simple gearbox dynamic model is used to show the effects of rotating input, output, and mesh frequency components on the electromagnetic torque and consequently on the stator current signature. By this model, the influence of transmission error, eccentricities of pinion/wheel, and teeth contact stiffness variation is demonstrated for a healthy gearbox. Then, it is shown that the electrical machine can be considered as a torque sensor through electromagnetic torque estimation for Torsional Vibration monitoring without any extra mechanical sensor. A test-rig based on a 5.5-kW three-phase squirrel-cage induction motor connected to a wound-rotor 4-kW induction generator via a one-stage gearbox has been used to validate the proposed method.
Humberto Henao - One of the best experts on this subject based on the ideXlab platform.
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planetary gearbox Torsional Vibration effects on wound rotor induction generator electrical signatures
IEEE Transactions on Industry Applications, 2016Co-Authors: Mohammad Hoseintaba Marzebali, Shahin Hedayati Kia, Gérard André Capolino, Humberto Henao, Jawad FaizAbstract:In this paper, Torsional Vibration effects of a planetary gearbox on electrical signatures of a wound-rotor induction generator have been studied in a representative complex electromechanical system through both numerical simulations and experiments. A universal lumped-parameter model has been developed with consideration of impacts of main drive-train mechanical components. This model has been adapted to a reduced-scale wind turbine simulator based on a 5.5-kW three-phase wound-rotor induction generator used for experimental validation at different load conditions. For this system, it has been demonstrated that most of mechanical characteristic frequencies of the planetary gearbox are difficult to be identified in the stator current spectrum. Nevertheless, the proposed approach has been used as an initial stage to assess the effectiveness of noninvasive condition monitoring of a planetary gearbox based on electrical signatures analysis.
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planetary gearbox Torsional Vibration effects on wound rotor induction generator electrical signatures
International Electric Machines and Drives Conference, 2015Co-Authors: Mohammad Hoseintaba Marzebali, Shahin Hedayati Kia, Gérard André Capolino, Humberto Henao, Jawad FaizAbstract:Recently, alternative non-invasive methods based on electrical signature analysis have been proposed as an effective, easy and cheap way for electrical and mechanical faults detection in complex electromechanical systems such as wind turbines and traction systems. This paper aims to study the Torsional Vibration effects of a planetary gearbox which is a vital component of wind turbines on the electrical signatures of a wound rotor induction generator through both numerical simulations and experiments. A lumped model of planetary gearbox which needs minimum number of mechanical parameters is linked to the classical model of wound rotor induction generator in abc reference frame. The numerical simulation results show that some of mechanical characteristic frequencies of the planetary gearbox can be identified in the electromagnetic torque and stator current signatures of wound rotor induction generator. A reduced scale wind turbine simulator based on a 5.5 kW wound rotor induction generator is used for experimental verification of the proposed model at different working conditions.
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Torsional-Vibration assessment and gear-fault diagnosis in railway traction system
IEEE Transactions on Industrial Electronics, 2011Co-Authors: Humberto Henao, Shahin Hedayati Kia, Gérard André CapolinoAbstract:The diagnosis of mechanical faults in railway traction systems (RTSs) has a significant importance on both safety and reliability, which can avoid train crashes. This papaer deals with Torsional-Vibration assessment and gear-fault diagnosis in the mechanical transmission of a high-speed RTS by a fully noninvasive technique. Previous studies on a simple gearbox-based electromechanical system have shown that the influence of gearbox Torsional Vibrations on the torque and on the stator-current signatures are obvious. The aim of this paper is to demonstrate that the traction motor can be considered as a torque sensor through its electromagnetic-torque estimation for TorsionalVibration monitoring without any extra mechanical sensor. The effects of both tooth-damage and surface-wear faults at the output wheel on the stator current and on the estimated electromagnetic torque have been investigated. The results of the estimation are compared with the measured mechanical torque and validated through a reduced-scale RTS in both stationary and nonstationary conditions.
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Torsional Vibration assessment using induction machine electromagnetic torque estimation
IEEE Transactions on Industrial Electronics, 2010Co-Authors: Shahin Hedayati Kia, Humberto Henao, Gérard André CapolinoAbstract:Mechanical anomalies such as load troubles, great torque dynamic variations, and Torsional oscillations result in the shaft fatigue of electrical machine and other mechanical parts such as bearings and gearboxes. Particularly, the Torsional Vibration may attain a significant level at resonant frequencies which damage or cause additional lifetime consumption of mechanical parts. In this way, this paper proposes a noninvasive technique through the electromagnetic torque estimation of driving induction machine as a mean of mechanical Torsional stresses monitoring. The lubrication loss is considered as a gear failure to demonstrate its influence on the Vibration and on the electromagnetic estimated torque signatures. Then, it is shown that the information in the electromagnetic torque can be decomposed into high- and low-frequency bandwidths which are associated to induction machine and gearbox mechanical-related frequencies, respectively. A setup based on a 5.5-kW three-phase squirrel-cage induction motor connected to a 4-kW wound-rotor induction generator via a one-stage gearbox has been used to validate the proposed method in both stationary and nonstationary conditions.
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Torsional Vibration effects on induction machine current and torque signatures in gearbox based electromechanical system
IEEE Transactions on Industrial Electronics, 2009Co-Authors: Humberto Henao, Gérard André CapolinoAbstract:The monitoring of heavy-duty electromechanical systems is crucial for their preventive maintenance planning. In these systems, the mechanical anomalies such as load troubles, great torque dynamic variations, and Torsional oscillations lead to shaft fatigue and aging of other mechanical parts such as bearings and gearboxes. In this paper, a gearbox-based electromechanical system is investigated. Initially, a simple gearbox dynamic model is used to show the effects of rotating input, output, and mesh frequency components on the electromagnetic torque and consequently on the stator current signature. By this model, the influence of transmission error, eccentricities of pinion/wheel, and teeth contact stiffness variation is demonstrated for a healthy gearbox. Then, it is shown that the electrical machine can be considered as a torque sensor through electromagnetic torque estimation for Torsional Vibration monitoring without any extra mechanical sensor. A test-rig based on a 5.5-kW three-phase squirrel-cage induction motor connected to a wound-rotor 4-kW induction generator via a one-stage gearbox has been used to validate the proposed method.
Shahin Hedayati Kia - One of the best experts on this subject based on the ideXlab platform.
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planetary gearbox Torsional Vibration effects on wound rotor induction generator electrical signatures
IEEE Transactions on Industry Applications, 2016Co-Authors: Mohammad Hoseintaba Marzebali, Shahin Hedayati Kia, Gérard André Capolino, Humberto Henao, Jawad FaizAbstract:In this paper, Torsional Vibration effects of a planetary gearbox on electrical signatures of a wound-rotor induction generator have been studied in a representative complex electromechanical system through both numerical simulations and experiments. A universal lumped-parameter model has been developed with consideration of impacts of main drive-train mechanical components. This model has been adapted to a reduced-scale wind turbine simulator based on a 5.5-kW three-phase wound-rotor induction generator used for experimental validation at different load conditions. For this system, it has been demonstrated that most of mechanical characteristic frequencies of the planetary gearbox are difficult to be identified in the stator current spectrum. Nevertheless, the proposed approach has been used as an initial stage to assess the effectiveness of noninvasive condition monitoring of a planetary gearbox based on electrical signatures analysis.
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planetary gearbox Torsional Vibration effects on wound rotor induction generator electrical signatures
International Electric Machines and Drives Conference, 2015Co-Authors: Mohammad Hoseintaba Marzebali, Shahin Hedayati Kia, Gérard André Capolino, Humberto Henao, Jawad FaizAbstract:Recently, alternative non-invasive methods based on electrical signature analysis have been proposed as an effective, easy and cheap way for electrical and mechanical faults detection in complex electromechanical systems such as wind turbines and traction systems. This paper aims to study the Torsional Vibration effects of a planetary gearbox which is a vital component of wind turbines on the electrical signatures of a wound rotor induction generator through both numerical simulations and experiments. A lumped model of planetary gearbox which needs minimum number of mechanical parameters is linked to the classical model of wound rotor induction generator in abc reference frame. The numerical simulation results show that some of mechanical characteristic frequencies of the planetary gearbox can be identified in the electromagnetic torque and stator current signatures of wound rotor induction generator. A reduced scale wind turbine simulator based on a 5.5 kW wound rotor induction generator is used for experimental verification of the proposed model at different working conditions.
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Torsional-Vibration assessment and gear-fault diagnosis in railway traction system
IEEE Transactions on Industrial Electronics, 2011Co-Authors: Humberto Henao, Shahin Hedayati Kia, Gérard André CapolinoAbstract:The diagnosis of mechanical faults in railway traction systems (RTSs) has a significant importance on both safety and reliability, which can avoid train crashes. This papaer deals with Torsional-Vibration assessment and gear-fault diagnosis in the mechanical transmission of a high-speed RTS by a fully noninvasive technique. Previous studies on a simple gearbox-based electromechanical system have shown that the influence of gearbox Torsional Vibrations on the torque and on the stator-current signatures are obvious. The aim of this paper is to demonstrate that the traction motor can be considered as a torque sensor through its electromagnetic-torque estimation for TorsionalVibration monitoring without any extra mechanical sensor. The effects of both tooth-damage and surface-wear faults at the output wheel on the stator current and on the estimated electromagnetic torque have been investigated. The results of the estimation are compared with the measured mechanical torque and validated through a reduced-scale RTS in both stationary and nonstationary conditions.
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Torsional Vibration assessment using induction machine electromagnetic torque estimation
IEEE Transactions on Industrial Electronics, 2010Co-Authors: Shahin Hedayati Kia, Humberto Henao, Gérard André CapolinoAbstract:Mechanical anomalies such as load troubles, great torque dynamic variations, and Torsional oscillations result in the shaft fatigue of electrical machine and other mechanical parts such as bearings and gearboxes. Particularly, the Torsional Vibration may attain a significant level at resonant frequencies which damage or cause additional lifetime consumption of mechanical parts. In this way, this paper proposes a noninvasive technique through the electromagnetic torque estimation of driving induction machine as a mean of mechanical Torsional stresses monitoring. The lubrication loss is considered as a gear failure to demonstrate its influence on the Vibration and on the electromagnetic estimated torque signatures. Then, it is shown that the information in the electromagnetic torque can be decomposed into high- and low-frequency bandwidths which are associated to induction machine and gearbox mechanical-related frequencies, respectively. A setup based on a 5.5-kW three-phase squirrel-cage induction motor connected to a 4-kW wound-rotor induction generator via a one-stage gearbox has been used to validate the proposed method in both stationary and nonstationary conditions.
Jiromaru Tsujino - One of the best experts on this subject based on the ideXlab platform.
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load characteristics of ultrasonic motor with a longitudinal Torsional converter and various nonlinear springs for inducing static pressure
Internaltional Ultrasonics Symposium, 2001Co-Authors: Jiromaru Tsujino, A SuzukiAbstract:Ultrasonic rotary motors using a longitudinal-Torsional Vibration converter and a nonlinear spring for inducing static pressure were studied. Using nonlinear static pressure source, static pressure (frictional driving force) increases during forward duty cycle, and the force during opposite retracting cycle decreases resulting small frictional loss, and the load characteristics of the motor were significantly improved. Nonlinear static and dynamic characteristics of various material spring were measured.
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load characteristics and Vibration loci at the driving surfaces of ultrasonic rotary motor using a longitudinal Torsional Vibration converter
Japanese Journal of Applied Physics, 1998Co-Authors: Jiromaru Tsujino, Kentaro Nakai, Kazuhide Sako, Noritada Ikegami, Kohsuke Noda, Ryo SuzukiAbstract:Characteristics of ultrasonic rotary motors using a longitudinal-Torsional Vibration converter, 15 to 50 mm in diameter, are studied. To obtain a large torque, ultrasonic motors using one-dimensional longitudinal-Torsional converters with diagonal slits are proposed. The converters have simple and tough structures and are driven using only a longitudinal Vibration transducer. The Vibration converters are fabricated from metal materials and have diagonal slits cut along the converter circumference, adjacent to a nodal position of longitudinal Vibration. The ultrasonic motors consist of a Vibration converter having a driving part at its free edge, and a rotor part statically pressed to the driving surface using corned disk springs. The Vibration characteristics and Vibration loci at the driving surfaces of these converters and motors are measured under loaded and nonloaded conditions and at forward and reverse rotating conditions, using two laser Doppler vibrometers. Vibration locus shapes are changed according to the load conditions and frequencies. Maximum torques of over 0.2 Nm are obtained by the converters, 15 to 20 mm in diameter, and at frequencies of 56 to 65 kHz. The maximum revolution speed obtained is over 550 r.p.m. using a 15-mm-diameter motor of 56 kHz.
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characteristics of two Vibration system ultrasonic plastic welding with 90 khz and 20 khz Vibration systems at right angles
Japanese Journal of Applied Physics, 1996Co-Authors: Jiromaru Tsujino, Toshiki Tamura, Takako Uchida, Tetsugi UeokaAbstract:The direct welding characteristics of an ultrasonic plastic welding system with an upper 90 kHz longitudinal welding tip with a small Vibration amplitude and a lower 20 kHz low frequency Torsional Vibration welding tip with a large Vibration amplitude at right angles are studied. By using a combination of high and low Vibration frequency systems with small and large Vibration amplitude welding tips, the welding characteristics are improved, resulting in a smaller required Vibration amplitude and less damage to the specimens due to Vibration than those using conventional systems. The two-Vibration-system welding equipment consists of a 90 kHz upper longitudinal Vibration source with six bolt-clamped Langevin-type piezoelectric ceramic (lead-zircon-titanate; PZT) transducers 15 mm in diameter, a 20 kHz Torsional Vibration system 40 mm in diameter and a welding frame. The total required velocity amplitude of the two-Vibration-system welding equipment is decreased and the welding characteristics are improved significantly compared to those of conventional one-Vibration-system for both soft and hard plastic sheet welding.
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load characteristics of ultrasonic rotary motor using a longitudinal Torsional Vibration converter with diagonal slits large torque ultrasonic rotary motor
Ultrasonics, 1996Co-Authors: Jiromaru Tsujino, Ryo Suzuki, Masanobu TakeuchiAbstract:Abstract The characteristics of an ultrasonic rotary motor using a longitudinal-Torsional Vibration converter with a large torque are studied. To obtain a large torque, ultrasonic motors using a slitted longitudinal-Torsional Vibration converter are proposed. The converters have rather simple structures and are driven using only a longitudinal Vibration transducer. The Vibration converters have 8 to 16 diagonal slits of 45 ° and 0.5 to 1.0 mm width. The designed ultrasonic motors consist of a Vibration converter with a driving part at its free edge, and a rotor part pressed statically to a driving surface using corned disk springs. Characteristics of these motors are measured under loading by various weights. Maximum torques over 0.3 to 23 Nm were obtained by converters of 15 to 60 mm in diameter and of 56 to 23 kHz in frequency. Maximum revolution obtained was over 290 r.p.m. using a 15 mm diameter motor of 56 kHz.
Masanobu Takeuchi - One of the best experts on this subject based on the ideXlab platform.
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load characteristics of ultrasonic rotary motor using a longitudinal Torsional Vibration converter with diagonal slits large torque ultrasonic rotary motor
Ultrasonics, 1996Co-Authors: Jiromaru Tsujino, Ryo Suzuki, Masanobu TakeuchiAbstract:Abstract The characteristics of an ultrasonic rotary motor using a longitudinal-Torsional Vibration converter with a large torque are studied. To obtain a large torque, ultrasonic motors using a slitted longitudinal-Torsional Vibration converter are proposed. The converters have rather simple structures and are driven using only a longitudinal Vibration transducer. The Vibration converters have 8 to 16 diagonal slits of 45 ° and 0.5 to 1.0 mm width. The designed ultrasonic motors consist of a Vibration converter with a driving part at its free edge, and a rotor part pressed statically to a driving surface using corned disk springs. Characteristics of these motors are measured under loading by various weights. Maximum torques over 0.3 to 23 Nm were obtained by converters of 15 to 60 mm in diameter and of 56 to 23 kHz in frequency. Maximum revolution obtained was over 290 r.p.m. using a 15 mm diameter motor of 56 kHz.