EPE Association: EPE 2007 - Subtopic 10-6

EPE 2007 - Subtopic 10-6 - DS: Electrical Machines
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2007 - Conference > EPE 2007 - Topic 10: 'Electrical machines' > EPE 2007 - Subtopic 10-6 - DS: Electrical Machines

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   A New Model of Vector-Controlled Doubly-Salient Permanent Magnet Motor in Brushless AC Operation
By CHEN Zhe; CHENG Ming; HUA Wei; ZHANG Jianzhong [View]
[Download]

Abstract: The abstract is not available.

   Comparison of Signal Injection Methods for Sensorless Control of PMSM at Very Low Speeds
By WU Shanshan; LI Yongdong [View]
[Download]

Abstract: This paper presents two different sensorless vector control methods for permanent magnet synchronous motor (PMSM) drive at very low speed range. One is high-frequency (HF) signal injection method, which utilizes the electromagnetic saliency of PMSM. The other one is low-frequency (LF) signal injection method, which is based only on the fundamental-wave model of PMSM. This paper compares the two methods by various simulations and experiments and finally some useful conclusions will be given.

   Detection of Rotor Faults in Torque Controlled Induction Motor Drives
By CUNHA Carla; CARDOSO FILHO Braz; LYRA Renato [View]
[Download]

Abstract: In the supervision of electrical equipment, the task of diagnostic system is to detect an upcoming machine fault as soon as possible, in order to save expensive manufacturing processes or to replace fault parts. An important issue in such effort is the modelling of the induction machine (IM) including rotor bar and end-ring faults, with a minimum of computational complexity. In this paper, a simpler method is employed in the simulation of an induction motor with rotor asymmetries. Simulation of classical and dynamic space vector models, Finite Element Analysis and experimental results are presented to support the proposed model. The need for detection of rotor faults at an earlier stage has pushed the development of monitoring methods with increasing sensitivity and noise immunity. Addressing diagnostic techniques based on current signatures analysis (MCSA), the characteristic components introduced by specific faults in the current spectrum are investigated and a diagnosis procedure correlates the amplitudes of such components to the fault extent. The impact of feedback control on asymmetric rotor cage induction machine behavior is also analyzed. It is shown that the variables usually employed in diagnosis procedures assuming open-loop operation are no longer effective under closed-loop operation. Simulation results show that signals already present at the drive are suitable to effective diagnostic procedure. The utilization of the current regulator error signals in rotor failure detection are the aim of the present work. The use of a band-pass filter bank to detect the presence of sidebands is also proposed.

   Fault detection in Induction Machines by using Continuous and Discrete Wavelet Decomposition
By GARCIA Antoni; ORTEGA Juan Antonio; CUSIDO Jordi; ROSERO Javier; ROMERAL Luis [View]
[Download]

Abstract: Motor Current Signature Analysis has been successfully used in induction machines for fault diagnosis. The method however does not always achieve good results when the load torque is not constant. This paper proposes a new approach to motor fault detection, by Wavelet decomposition analysis. Theoretical development and experimental results are presented to support the research.

   Harmonics and negative sequence voltage compensation under nonlinear load
By FATU Marius; TEODORESCU Remus; BOLDEA Ion; TUTELEA Lucian [View]
[Download]

Abstract: The present paper introduces a novel harmonics voltage compensation solution for nonlinear (diode rectifier) load operation in stand alone PMSG with bidirectional converter motion sensorless vector control. Both the case of three phases and two phase output of the load side converter, with voltage symmetrisation by negative component active cancellation, are treated. The latter is called unbalanced load handling. The main solutions for motion sensorless vector control of the two back-to-back PWM converters with loops to compensate output voltage harmonics and its negative sequence for diode rectifier load are introduced, implemented and validated through experimental results on 2.2 Kw PMSG systems.

   Induction Machines Fault Simulation Based on FEM Modelling
By ROMERAL Luis; GARCIA Antoni; ORTEGA Juan Antonio; CUSIDO Jordi [View]
[Download]

Abstract: Induction machines operated by inverter use to present efficiency decrease and sometimes present additional rotor and stator fault as well. FEM has been used for faulty motor simulation and shows results of motor fault effects. Experimental results corroborate the simulation and theoretical effects of the faults.

   Optimal Design of a Flux Switching Permanent Magnet Machine for Minimum Cogging Torque
By CHEN Zhe; ZHANG Jianzhong; CHENG Ming [View]
[Download]

Abstract: The abstract is not available.

   Small-Signal Model for Saturated Deep-Bar Induction Machines
By HINKKANEN Marko; CEDERHOLM Mikaela; REPO Anna-Kaisa; LUOMI Jorma [View]
[Download]

Abstract: A small-signal model is presented for saturated deep-bar induction machines. Inductances are allowed to saturate as a function of their own current (or flux), and the mutual saturation effect originating mainly from closed or skewed rotor slots is also included in the model. The model fulfills the reciprocity conditions, and it can applied to parameter estimation and to the analysis and development of flux angle estimation methods. The model is applied to estimating the parameters of a 37-kW deep-bar cage-induction machine, using the data from time-stepping finite-element analysis (FEA). The proposed model fits very well to the FEA data in a wide frequency range.

   Steel Power losses simulation based on Inverter/Induction Machine Design
By CARVALHO Adriano; ARAÃšJO Armando; SOARES Orlando; GONCALVES Henrique [View]
[Download]

Abstract: Induction machines and the adjustable speed applications are a well established reality of todays industry. In a growing domain, adjustable speed is being utilized not only for industrial processes but for energy generation as well. However the performance of the induction machine is different either if it is fed by a static power converter or if it is fed directly from the grid. Surely, there are not technological limitations, but imposed limitations of a standard construction, for generic use at constant voltage and frequency. Traditional design methodologies are not able to satisfy these new application demands what implies to establish a new integrated methodology based on integrating simultaneous analysis of the whole system. This way the constraints imposed on the machine by standard design can be overcome. The proposed methodology in this paper combines the design of the power converter operating within real electrical conditions with the finite element design of the machine, in order to optimize machine and overall operation. It gives a contribution to the knowledge of converter and machine interactions in the whole system and carries out a better characterization of the power losses what reflects in a more efficient thermal sizing and reduces the overrating of the machine.

   The System Simulation for Small size and Ultra-High Speed Motor Drive System using Coupled analysis
By OYAMA Jun; ABE Takashi; HIGUCHI Tsuyoshi; SHIGEMATSU Koichi [View]
[Download]

Abstract: A trial small size and ultra-high speed motor drive system of 5kW and 240,000rpm is designed and built. And we had described our prototype drive system and some experimental results in previous papers. For evaluating the motor drive system, we also are working on an electric and magnetic coupled-analysis in which we use not only the motor model from FEM but also the drive and control system models in the circuit simulation. This paper describes how total motor drive systems are modeled by using the coupled analysis to represent for entire system simulation. The simulation results are verified in comparison with the experimental results.

   Two rotors designs' comparison of permanent magnet brushless synchronousmotor for an electric power steering application
By JUNAK Jacek; OMBACH Grzegorz [View]
[Download]

Abstract: The paper presents a comparison of two permanent brushless synchronous magnet motor structures realized with same stator geometry and with different types of rotor: the radial ring magnet rotor (RM) and the inerior permanent magnet (IPM) rotor type. There motors are designed for a mass production for an electric power steering application. The important factors for an electric power steering applications like: cogging torque, power density, sizing and robustness are compared.

EPE 2007 - Subtopic 10-6 - DS: Electrical Machines
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2007 - Conference > EPE 2007 - Topic 10: 'Electrical machines' > EPE 2007 - Subtopic 10-6 - DS: Electrical Machines
	[return to parent folder]

	A New Model of Vector-Controlled Doubly-Salient Permanent Magnet Motor in Brushless AC Operation By CHEN Zhe; CHENG Ming; HUA Wei; ZHANG Jianzhong	[View] [Download]
Abstract: The abstract is not available.

	Comparison of Signal Injection Methods for Sensorless Control of PMSM at Very Low Speeds By WU Shanshan; LI Yongdong	[View] [Download]
Abstract: This paper presents two different sensorless vector control methods for permanent magnet synchronous motor (PMSM) drive at very low speed range. One is high-frequency (HF) signal injection method, which utilizes the electromagnetic saliency of PMSM. The other one is low-frequency (LF) signal injection method, which is based only on the fundamental-wave model of PMSM. This paper compares the two methods by various simulations and experiments and finally some useful conclusions will be given.

	Detection of Rotor Faults in Torque Controlled Induction Motor Drives By CUNHA Carla; CARDOSO FILHO Braz; LYRA Renato	[View] [Download]
Abstract: In the supervision of electrical equipment, the task of diagnostic system is to detect an upcoming machine fault as soon as possible, in order to save expensive manufacturing processes or to replace fault parts. An important issue in such effort is the modelling of the induction machine (IM) including rotor bar and end-ring faults, with a minimum of computational complexity. In this paper, a simpler method is employed in the simulation of an induction motor with rotor asymmetries. Simulation of classical and dynamic space vector models, Finite Element Analysis and experimental results are presented to support the proposed model. The need for detection of rotor faults at an earlier stage has pushed the development of monitoring methods with increasing sensitivity and noise immunity. Addressing diagnostic techniques based on current signatures analysis (MCSA), the characteristic components introduced by specific faults in the current spectrum are investigated and a diagnosis procedure correlates the amplitudes of such components to the fault extent. The impact of feedback control on asymmetric rotor cage induction machine behavior is also analyzed. It is shown that the variables usually employed in diagnosis procedures assuming open-loop operation are no longer effective under closed-loop operation. Simulation results show that signals already present at the drive are suitable to effective diagnostic procedure. The utilization of the current regulator error signals in rotor failure detection are the aim of the present work. The use of a band-pass filter bank to detect the presence of sidebands is also proposed.

	Fault detection in Induction Machines by using Continuous and Discrete Wavelet Decomposition By GARCIA Antoni; ORTEGA Juan Antonio; CUSIDO Jordi; ROSERO Javier; ROMERAL Luis	[View] [Download]
Abstract: Motor Current Signature Analysis has been successfully used in induction machines for fault diagnosis. The method however does not always achieve good results when the load torque is not constant. This paper proposes a new approach to motor fault detection, by Wavelet decomposition analysis. Theoretical development and experimental results are presented to support the research.

	Harmonics and negative sequence voltage compensation under nonlinear load By FATU Marius; TEODORESCU Remus; BOLDEA Ion; TUTELEA Lucian	[View] [Download]
Abstract: The present paper introduces a novel harmonics voltage compensation solution for nonlinear (diode rectifier) load operation in stand alone PMSG with bidirectional converter motion sensorless vector control. Both the case of three phases and two phase output of the load side converter, with voltage symmetrisation by negative component active cancellation, are treated. The latter is called unbalanced load handling. The main solutions for motion sensorless vector control of the two back-to-back PWM converters with loops to compensate output voltage harmonics and its negative sequence for diode rectifier load are introduced, implemented and validated through experimental results on 2.2 Kw PMSG systems.

	Induction Machines Fault Simulation Based on FEM Modelling By ROMERAL Luis; GARCIA Antoni; ORTEGA Juan Antonio; CUSIDO Jordi	[View] [Download]
Abstract: Induction machines operated by inverter use to present efficiency decrease and sometimes present additional rotor and stator fault as well. FEM has been used for faulty motor simulation and shows results of motor fault effects. Experimental results corroborate the simulation and theoretical effects of the faults.

	Optimal Design of a Flux Switching Permanent Magnet Machine for Minimum Cogging Torque By CHEN Zhe; ZHANG Jianzhong; CHENG Ming	[View] [Download]
Abstract: The abstract is not available.

	Small-Signal Model for Saturated Deep-Bar Induction Machines By HINKKANEN Marko; CEDERHOLM Mikaela; REPO Anna-Kaisa; LUOMI Jorma	[View] [Download]
Abstract: A small-signal model is presented for saturated deep-bar induction machines. Inductances are allowed to saturate as a function of their own current (or flux), and the mutual saturation effect originating mainly from closed or skewed rotor slots is also included in the model. The model fulfills the reciprocity conditions, and it can applied to parameter estimation and to the analysis and development of flux angle estimation methods. The model is applied to estimating the parameters of a 37-kW deep-bar cage-induction machine, using the data from time-stepping finite-element analysis (FEA). The proposed model fits very well to the FEA data in a wide frequency range.

	Steel Power losses simulation based on Inverter/Induction Machine Design By CARVALHO Adriano; ARAÃšJO Armando; SOARES Orlando; GONCALVES Henrique	[View] [Download]
Abstract: Induction machines and the adjustable speed applications are a well established reality of todays industry. In a growing domain, adjustable speed is being utilized not only for industrial processes but for energy generation as well. However the performance of the induction machine is different either if it is fed by a static power converter or if it is fed directly from the grid. Surely, there are not technological limitations, but imposed limitations of a standard construction, for generic use at constant voltage and frequency. Traditional design methodologies are not able to satisfy these new application demands what implies to establish a new integrated methodology based on integrating simultaneous analysis of the whole system. This way the constraints imposed on the machine by standard design can be overcome. The proposed methodology in this paper combines the design of the power converter operating within real electrical conditions with the finite element design of the machine, in order to optimize machine and overall operation. It gives a contribution to the knowledge of converter and machine interactions in the whole system and carries out a better characterization of the power losses what reflects in a more efficient thermal sizing and reduces the overrating of the machine.

	The System Simulation for Small size and Ultra-High Speed Motor Drive System using Coupled analysis By OYAMA Jun; ABE Takashi; HIGUCHI Tsuyoshi; SHIGEMATSU Koichi	[View] [Download]
Abstract: A trial small size and ultra-high speed motor drive system of 5kW and 240,000rpm is designed and built. And we had described our prototype drive system and some experimental results in previous papers. For evaluating the motor drive system, we also are working on an electric and magnetic coupled-analysis in which we use not only the motor model from FEM but also the drive and control system models in the circuit simulation. This paper describes how total motor drive systems are modeled by using the coupled analysis to represent for entire system simulation. The simulation results are verified in comparison with the experimental results.

	Two rotors designs' comparison of permanent magnet brushless synchronousmotor for an electric power steering application By JUNAK Jacek; OMBACH Grzegorz	[View] [Download]
Abstract: The paper presents a comparison of two permanent brushless synchronous magnet motor structures realized with same stator geometry and with different types of rotor: the radial ring magnet rotor (RM) and the inerior permanent magnet (IPM) rotor type. There motors are designed for a mass production for an electric power steering application. The important factors for an electric power steering applications like: cogging torque, power density, sizing and robustness are compared.