The Experts below are selected from a list of 415824 Experts worldwide ranked by ideXlab platform
Juha Pyrhonen - One of the best experts on this subject based on the ideXlab platform.
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high speed high output solid Rotor induction motor technology for gas compression
IEEE Transactions on Industrial Electronics, 2010Co-Authors: Juha Pyrhonen, P. Kurronen, Janne Nerg, U LauberAbstract:This paper investigates the suitability of solid-Rotor induction-motor technology for a natural-gas-compression application with a high power output. To this end, a new solid-Rotor design for an 8-MW 6.6-kV 12 000-min-1 motor without any copper parts in the Rotor was developed, and the motor performance was tested. In this paper, solid-Rotor material selection, Rotor slitting, and the end effects of the purely solid Rotor are discussed. A frequency-dependent end-effect correction factor is introduced, and a method for the Rotor-end-leakage correction is presented. The performance of the proposed end-effect correction factor is verified by comparing the calculated torque and power factor with the measured values.
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Electromagnetic and mechanical design aspects of a high-speed solid-Rotor induction machine with no separate copper electric circuit in the megawatt range
Electrical Engineering, 2009Co-Authors: Juha Pyrhonen, Janne Nerg, Aki Mikkola, Jussi Sopanen, Tuomo AhoAbstract:The most crucial electro-magnetic and mechanical design aspects of an integrated electrical-motor–gas-compressor system in high speed and high power operation are presented. The electric motor type considered is a solid-Rotor induction motor with properties of which are particularly well suited in high-speed operation. The effect of the electro-magnetic material properties of the solid Rotor core material on the performance of the machine is discussed. Guidelines to improve the performance of the solid-Rotor induction motor are given. Thermal design aspects of a solid-Rotor induction motor are presented. The mechanical properties of a solid Rotor are discussed. Bearing arrangements as well as the Rotor dynamics of an integrated system are presented.
U Lauber - One of the best experts on this subject based on the ideXlab platform.
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high speed high output solid Rotor induction motor technology for gas compression
IEEE Transactions on Industrial Electronics, 2010Co-Authors: Juha Pyrhonen, P. Kurronen, Janne Nerg, U LauberAbstract:This paper investigates the suitability of solid-Rotor induction-motor technology for a natural-gas-compression application with a high power output. To this end, a new solid-Rotor design for an 8-MW 6.6-kV 12 000-min-1 motor without any copper parts in the Rotor was developed, and the motor performance was tested. In this paper, solid-Rotor material selection, Rotor slitting, and the end effects of the purely solid Rotor are discussed. A frequency-dependent end-effect correction factor is introduced, and a method for the Rotor-end-leakage correction is presented. The performance of the proposed end-effect correction factor is verified by comparing the calculated torque and power factor with the measured values.
Janne Nerg - One of the best experts on this subject based on the ideXlab platform.
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high speed high output solid Rotor induction motor technology for gas compression
IEEE Transactions on Industrial Electronics, 2010Co-Authors: Juha Pyrhonen, P. Kurronen, Janne Nerg, U LauberAbstract:This paper investigates the suitability of solid-Rotor induction-motor technology for a natural-gas-compression application with a high power output. To this end, a new solid-Rotor design for an 8-MW 6.6-kV 12 000-min-1 motor without any copper parts in the Rotor was developed, and the motor performance was tested. In this paper, solid-Rotor material selection, Rotor slitting, and the end effects of the purely solid Rotor are discussed. A frequency-dependent end-effect correction factor is introduced, and a method for the Rotor-end-leakage correction is presented. The performance of the proposed end-effect correction factor is verified by comparing the calculated torque and power factor with the measured values.
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Electromagnetic and mechanical design aspects of a high-speed solid-Rotor induction machine with no separate copper electric circuit in the megawatt range
Electrical Engineering, 2009Co-Authors: Juha Pyrhonen, Janne Nerg, Aki Mikkola, Jussi Sopanen, Tuomo AhoAbstract:The most crucial electro-magnetic and mechanical design aspects of an integrated electrical-motor–gas-compressor system in high speed and high power operation are presented. The electric motor type considered is a solid-Rotor induction motor with properties of which are particularly well suited in high-speed operation. The effect of the electro-magnetic material properties of the solid Rotor core material on the performance of the machine is discussed. Guidelines to improve the performance of the solid-Rotor induction motor are given. Thermal design aspects of a solid-Rotor induction motor are presented. The mechanical properties of a solid Rotor are discussed. Bearing arrangements as well as the Rotor dynamics of an integrated system are presented.
Ye Ming - One of the best experts on this subject based on the ideXlab platform.
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A Parallel Speed and Rotor Time Constant Identification Scheme for Indirect Field Oriented Induction Motor Drives
IEEE Transactions on Power Electronics, 2016Co-Authors: Lihang Zhao, Jin Huang, Jiahao Chen, Ye MingAbstract:Rotor time constant identification is necessary for high-performance indirect field oriented control of induction motor drives. Meanwhile, speed sensorless technique has many advantages such as low cost and reduced hardware complexity. In recent years, the estimation methods for motor speed have respectively grown to maturity, but the research in the identification of Rotor time constant remains to be extended. In this paper, an online scheme for parallel motor speed and Rotor time constant identification is proposed according to parameter features, with the operating frequencies of all modules carefully considered. First, the speed is estimated via Rotor slot harmonic extraction technique. On the premise of estimated speed, a derivative form of induction motor model is proposed for Rotor time constant identification, which overcomes the problems of pure integration in Rotor flux calculation. Correspondingly, instead of Rotor flux, derivative Rotor flux is used in the proposed model. Finally, an adjusted particle swarm optimization method is utilized on the proposed model to track the Rotor time constant. The robustness and effectiveness of the proposed scheme have been validated experimentally.
Thomas Anthony Lipo - One of the best experts on this subject based on the ideXlab platform.
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Rotor design optimization of synchronous reluctance machine
IEEE Transactions on Energy Conversion, 1994Co-Authors: T Matsuo, Thomas Anthony LipoAbstract:It is demonstrated that the Rotor design of synchronous reluctance machines can be optimized in terms of a key geometric parameter, i.e., the ratio of the Rotor insulation width to the Rotor iron width so as to obtain maximum torque production. The equation which gives the maximum motor power factor in terms of the saliency ratio has been derived and it is shown that the power factor of 0.8 is a realizable value with the optimal Rotor design. An experimental motor has been fabricated and the results of measurements of the motor parameters prove the validity of the Rotor design optimization
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Rotor position detection scheme for synchronous reluctance motor based on current measurements
Proceedings of 1994 IEEE Industry Applications Society Annual Meeting, 1Co-Authors: T Matsuo, Thomas Anthony LipoAbstract:A Rotor position detection scheme which utilizes the characteristics of the synchronous reluctance motor is proposed. In particular, the dependence of the self and mutual inductances on the Rotor position is utilized. The motor currents are controlled by a transistor inverter in the manner of hysteresis current control. The inverter switching creates ripples in the phase currents. The rate change of current in the ripples is then detected and converted to a Rotor position signal. The proposed scheme is aimed at providing Rotor position information particularly at low Rotor speed, even at zero Rotor speed. Numerical analysis of the rate change of the phase current of the synchronous reluctance motor is also discussed. >