Pub Date : 2007-12-26DOI: 10.1109/ICEMS.2007.4412325
S. Kim, K. Kawakami, M. Nishimoto, Y. Okimoto, T. Nakano, S. Murase
We have been investigating a three-dimensional (3-D) superconducting actuator using HTS bulk to develop the transportation device with non-contact and move in free space. Proposed superconducting actuator consists of the stator constructed by two-dimensional arranged electromagnets and HTS bulk superconductor as a mover. The 2-D arranged electromagnets were individually controlled to move the HTS bulk. It is expected that our proposed 3-D superconducting actuator will be useful as a transporter used in clean room which manufactures the silicon wafer where dislikes mechanical contact and dust. To realize the superconducting actuator with HTS bulks, the electromagnetic characteristics of HTS bulk, such as trapped field strength and patterns, should be clarified and the optimized controlling system is also required. Therefore, in this study, to construct the optimal 3-D actuator system, the fundamental characteristics of the levitation for HTS bulks with individually controlled four electromagnets were investigated experimentally.
{"title":"Development of superconducting actuator for the contactless transporter","authors":"S. Kim, K. Kawakami, M. Nishimoto, Y. Okimoto, T. Nakano, S. Murase","doi":"10.1109/ICEMS.2007.4412325","DOIUrl":"https://doi.org/10.1109/ICEMS.2007.4412325","url":null,"abstract":"We have been investigating a three-dimensional (3-D) superconducting actuator using HTS bulk to develop the transportation device with non-contact and move in free space. Proposed superconducting actuator consists of the stator constructed by two-dimensional arranged electromagnets and HTS bulk superconductor as a mover. The 2-D arranged electromagnets were individually controlled to move the HTS bulk. It is expected that our proposed 3-D superconducting actuator will be useful as a transporter used in clean room which manufactures the silicon wafer where dislikes mechanical contact and dust. To realize the superconducting actuator with HTS bulks, the electromagnetic characteristics of HTS bulk, such as trapped field strength and patterns, should be clarified and the optimized controlling system is also required. Therefore, in this study, to construct the optimal 3-D actuator system, the fundamental characteristics of the levitation for HTS bulks with individually controlled four electromagnets were investigated experimentally.","PeriodicalId":211729,"journal":{"name":"2007 International Conference on Electrical Machines and Systems (ICEMS)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123692670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2007-12-26DOI: 10.1109/ICEMS.2007.4411973
I. Hirotsuka, K. Kawakami, K. Tsuboi, H. Matsura, T. Mizuno
Recently, three-phase squirrel-cage induction motor (IM) has been frequently used as variable-speed motor driven by an inverter system. Generally, its losses increase and efficiency decrease when it is operated at high speed. Therefore, in this paper, we discuss the characteristics of eight motors with different gap lengths in relation to the experimental results.
{"title":"Characteristics of high-speed constant-voltage operation of squirrel-cage induction motors -the influence of gap length in 4- and 8-pole induction-","authors":"I. Hirotsuka, K. Kawakami, K. Tsuboi, H. Matsura, T. Mizuno","doi":"10.1109/ICEMS.2007.4411973","DOIUrl":"https://doi.org/10.1109/ICEMS.2007.4411973","url":null,"abstract":"Recently, three-phase squirrel-cage induction motor (IM) has been frequently used as variable-speed motor driven by an inverter system. Generally, its losses increase and efficiency decrease when it is operated at high speed. Therefore, in this paper, we discuss the characteristics of eight motors with different gap lengths in relation to the experimental results.","PeriodicalId":211729,"journal":{"name":"2007 International Conference on Electrical Machines and Systems (ICEMS)","volume":"430 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133940500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2007-12-26DOI: 10.1080/02726340902718450
J. Faiz, B. Ebrahimi, B. Asaie, R. Rajabioun, H. Toliyat
In this paper a novel criterion function is introduced to diagnose the breakage in rotor bars, which uses wavelet transform (WT) to process the stator current signal in faulty induction motors. This criterion function facilitates the diagnosis of fault in induction motors under load variation, precisely. The proposed function is based on wavelet coefficients of stator current in a specific frequency band. Meanwhile, in this paper broken rotor bar in induction motor is detected using spectrum analysis of stator current. It is also shown that increasing the load makes an increase in harmonic components amplitude of a faulty induction motor. A Time stepping finite element (TSFE) method is used for modeling broken rotor bar faults in induction motors. In this modeling, the effects of the spatial distribution of the stator winding, non uniform air-gap permeance, geometrical and physical characteristics of different parts of the motor, and finally non-linearity of the core materials are taken into account. The proposed algorithm is applied to the stator current of a healthy and faulty induction motor. The simulation results are obtained and their accuracy is verified by experimental results.
{"title":"A criterion function for broken bar fault diagnosis in induction motor under load variation using wavelet transform","authors":"J. Faiz, B. Ebrahimi, B. Asaie, R. Rajabioun, H. Toliyat","doi":"10.1080/02726340902718450","DOIUrl":"https://doi.org/10.1080/02726340902718450","url":null,"abstract":"In this paper a novel criterion function is introduced to diagnose the breakage in rotor bars, which uses wavelet transform (WT) to process the stator current signal in faulty induction motors. This criterion function facilitates the diagnosis of fault in induction motors under load variation, precisely. The proposed function is based on wavelet coefficients of stator current in a specific frequency band. Meanwhile, in this paper broken rotor bar in induction motor is detected using spectrum analysis of stator current. It is also shown that increasing the load makes an increase in harmonic components amplitude of a faulty induction motor. A Time stepping finite element (TSFE) method is used for modeling broken rotor bar faults in induction motors. In this modeling, the effects of the spatial distribution of the stator winding, non uniform air-gap permeance, geometrical and physical characteristics of different parts of the motor, and finally non-linearity of the core materials are taken into account. The proposed algorithm is applied to the stator current of a healthy and faulty induction motor. The simulation results are obtained and their accuracy is verified by experimental results.","PeriodicalId":211729,"journal":{"name":"2007 International Conference on Electrical Machines and Systems (ICEMS)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124248610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2007-12-26DOI: 10.1109/ICEMS.2007.4412287
J. Joo, S. Kim, K. Hitomi, S. Murase
We have been developing a new type of 3-D superconducting actuator using the strong pinning force of HTS (high temperature superconducting) bulk. The system includes HTS bulk and two-dimensionally arranged multiple electromagnets. The application of HTS bulk enables stable levitation and suspension, and its performance is determined mainly by the spatial distribution of the generated magnetic field of the electromagnets. To enhance the levitation force in the actuator, it is necessary to design the optimized geometry of the electromagnets. The target of the design is to lead to an intensive concentration and abrupt gradient increase of the perpendicular component in the magnetic field through the HTS bulk over the electromagnets. For the optimized design of the electromagnets, we calculated the spatial distribution of the trapped magnetic field and the levitation force of the HTS bulk using 3-D FEM analysis that is adopted the critical state model.
{"title":"Design of Electromagnet for high levitation force in 3D superconducting actuator","authors":"J. Joo, S. Kim, K. Hitomi, S. Murase","doi":"10.1109/ICEMS.2007.4412287","DOIUrl":"https://doi.org/10.1109/ICEMS.2007.4412287","url":null,"abstract":"We have been developing a new type of 3-D superconducting actuator using the strong pinning force of HTS (high temperature superconducting) bulk. The system includes HTS bulk and two-dimensionally arranged multiple electromagnets. The application of HTS bulk enables stable levitation and suspension, and its performance is determined mainly by the spatial distribution of the generated magnetic field of the electromagnets. To enhance the levitation force in the actuator, it is necessary to design the optimized geometry of the electromagnets. The target of the design is to lead to an intensive concentration and abrupt gradient increase of the perpendicular component in the magnetic field through the HTS bulk over the electromagnets. For the optimized design of the electromagnets, we calculated the spatial distribution of the trapped magnetic field and the levitation force of the HTS bulk using 3-D FEM analysis that is adopted the critical state model.","PeriodicalId":211729,"journal":{"name":"2007 International Conference on Electrical Machines and Systems (ICEMS)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124317696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2007-12-26DOI: 10.1109/ICEMS12746.2007.4412237
Zhou Peng, Yikang He
This paper proposes a novel crowbar control technique and a stator voltage oriented direct power control (SVODPC strategy for the doubly fed induction generator (DFIG) used in wind power generation systems. The main difficulty for a DFIG to ride through a severe symmetrical grid voltage dip is the big transient currents induced in the rotor windings, which may damage the AC excitation converter. The proposed SVODPC is capable of suppressing the transient oscillations of the fault currents and electromagnetic torque. The crowbar protection is able to limit the peak values of the rotor currents under a preset threshold. Moreover, reactive current is injected in good time to assist the recovery of the grid voltage. Simulation results prove that with this control scheme the DFIG is able to ride through the severe grid voltage dips.
{"title":"Control strategy of an active crowbar for DFIG based wind turbine under grid voltage dips","authors":"Zhou Peng, Yikang He","doi":"10.1109/ICEMS12746.2007.4412237","DOIUrl":"https://doi.org/10.1109/ICEMS12746.2007.4412237","url":null,"abstract":"This paper proposes a novel crowbar control technique and a stator voltage oriented direct power control (SVODPC strategy for the doubly fed induction generator (DFIG) used in wind power generation systems. The main difficulty for a DFIG to ride through a severe symmetrical grid voltage dip is the big transient currents induced in the rotor windings, which may damage the AC excitation converter. The proposed SVODPC is capable of suppressing the transient oscillations of the fault currents and electromagnetic torque. The crowbar protection is able to limit the peak values of the rotor currents under a preset threshold. Moreover, reactive current is injected in good time to assist the recovery of the grid voltage. Simulation results prove that with this control scheme the DFIG is able to ride through the severe grid voltage dips.","PeriodicalId":211729,"journal":{"name":"2007 International Conference on Electrical Machines and Systems (ICEMS)","volume":"2012 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129835913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2007-12-26DOI: 10.1080/15325000903376974
A. M. Howlader, N. Urasaki, Kousuke Uchida, A. Yona, T. Senjyu, Chul-Hwan Kim, A. Saber
Wind energy is a significant and powerful resource. It is safe, clean, and abundant. Variable speed power generation for a wind turbine is attractive, because maximum efficiency can be achieved at all wind velocities. However, this system requires parameters of wind turbine for calculation of the optimum wind turbine operation speed. In this paper, a technique is proposed for maximum power point tracking control of a wind generation system. The optimum operation speed to which the maximization of the output power of the wind turbine is determined takes into consideration identification of parameters by an iterative least squares technique. The effectiveness of maximum power point tracking control with the identified parameters is verified by simulations for the wind power generation system. Additionally, the paper addresses the effect on the rotational speed and output power in the event that the wind turbine parameters used in optimum rotational speed determination have error.
{"title":"Parameter identification of wind turbine for maximum power point tracking control","authors":"A. M. Howlader, N. Urasaki, Kousuke Uchida, A. Yona, T. Senjyu, Chul-Hwan Kim, A. Saber","doi":"10.1080/15325000903376974","DOIUrl":"https://doi.org/10.1080/15325000903376974","url":null,"abstract":"Wind energy is a significant and powerful resource. It is safe, clean, and abundant. Variable speed power generation for a wind turbine is attractive, because maximum efficiency can be achieved at all wind velocities. However, this system requires parameters of wind turbine for calculation of the optimum wind turbine operation speed. In this paper, a technique is proposed for maximum power point tracking control of a wind generation system. The optimum operation speed to which the maximization of the output power of the wind turbine is determined takes into consideration identification of parameters by an iterative least squares technique. The effectiveness of maximum power point tracking control with the identified parameters is verified by simulations for the wind power generation system. Additionally, the paper addresses the effect on the rotational speed and output power in the event that the wind turbine parameters used in optimum rotational speed determination have error.","PeriodicalId":211729,"journal":{"name":"2007 International Conference on Electrical Machines and Systems (ICEMS)","volume":"142 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133958857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2007-12-26DOI: 10.1109/ICEMS.2007.4411947
B. Akin, H. Toliyat, U. Orguner, M. Rayner
In this paper, two simple digital signal processor (DSP)-based motor fault signature detection techniques are presented. First, the reference frame theory and its applications to fault diagnosis of electric machinery are introduced. Second, phase sensitive detection (PSD) of motor fault signatures is presented. Both techniques provide very simple and robust way to find the magnitude and phase of the specified fault signatures in the line current. Particularly, PSD has a powerful line current noise suppression capability while detecting the fault signatures. Various faults are experimentally tested both offline using the data acquisition system, and online employing the TMS320F2812 DSP to prove the efficacy of the proposed tools. The advantages of these methods include the following: (1) no need to employ external hardware or a PC running a high level program; (2) provides instantaneous fault monitoring using a DSP controller in real time; (3) embedded into the motor drive; thus, readily available drive sensors and the core processor are used without employing additional hardware; (4) no need to store machine currents data, and thus no need for large memory size; (5) very short convergence time capability; (6) immune to non- idealities like sensor dc offsets, imbalance, etc. ; (7) no need for a notch filter to filter out the fundamental harmonic; (8) steady state or stationary current signal assumptions are not necessary; (9) a familiar concept for motor control engineers; and (10) applicable to all multi-phase and single phase motors.
{"title":"Simple realtime condition monitoring tools for low-cost motor drives","authors":"B. Akin, H. Toliyat, U. Orguner, M. Rayner","doi":"10.1109/ICEMS.2007.4411947","DOIUrl":"https://doi.org/10.1109/ICEMS.2007.4411947","url":null,"abstract":"In this paper, two simple digital signal processor (DSP)-based motor fault signature detection techniques are presented. First, the reference frame theory and its applications to fault diagnosis of electric machinery are introduced. Second, phase sensitive detection (PSD) of motor fault signatures is presented. Both techniques provide very simple and robust way to find the magnitude and phase of the specified fault signatures in the line current. Particularly, PSD has a powerful line current noise suppression capability while detecting the fault signatures. Various faults are experimentally tested both offline using the data acquisition system, and online employing the TMS320F2812 DSP to prove the efficacy of the proposed tools. The advantages of these methods include the following: (1) no need to employ external hardware or a PC running a high level program; (2) provides instantaneous fault monitoring using a DSP controller in real time; (3) embedded into the motor drive; thus, readily available drive sensors and the core processor are used without employing additional hardware; (4) no need to store machine currents data, and thus no need for large memory size; (5) very short convergence time capability; (6) immune to non- idealities like sensor dc offsets, imbalance, etc. ; (7) no need for a notch filter to filter out the fundamental harmonic; (8) steady state or stationary current signal assumptions are not necessary; (9) a familiar concept for motor control engineers; and (10) applicable to all multi-phase and single phase motors.","PeriodicalId":211729,"journal":{"name":"2007 International Conference on Electrical Machines and Systems (ICEMS)","volume":"1069 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132185050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2007-12-26DOI: 10.1109/ICEMS.2007.4412320
H. Kusayanagi, M. Takemoto, Y. Tanaka, A. Chiba, T. Fukao
Various types of permanent-magnet type bearingless motors, which have integrated magnetic bearings with permanent magnet synchronous motors, have been developed actively. However, these motors cannot effectively generate electromagnetic suspension force for rotor shaft suspension, because suspension flux is attenuated owing to passing through high magnetic reluctance of permanent magnets. Accordingly, the authors have proposed a novel permanent-magnet type bearingless motor with positive salient pole that inductance Ld in the q-axis direction is greater than inductance Lq in the q-axis direction. In previous papers, it was shown with 2D-FEM that the proposed motor can generate the suspension force effectively, because the suspension flux does not pass through the permanent magnets. This paper introduces basic characteristics of torque and suspension force in the proposed motor with test results of a prototype machine.
{"title":"Basic characteristics of a permanent-magnet type bearingless motor with positive salient pole","authors":"H. Kusayanagi, M. Takemoto, Y. Tanaka, A. Chiba, T. Fukao","doi":"10.1109/ICEMS.2007.4412320","DOIUrl":"https://doi.org/10.1109/ICEMS.2007.4412320","url":null,"abstract":"Various types of permanent-magnet type bearingless motors, which have integrated magnetic bearings with permanent magnet synchronous motors, have been developed actively. However, these motors cannot effectively generate electromagnetic suspension force for rotor shaft suspension, because suspension flux is attenuated owing to passing through high magnetic reluctance of permanent magnets. Accordingly, the authors have proposed a novel permanent-magnet type bearingless motor with positive salient pole that inductance Ld in the q-axis direction is greater than inductance Lq in the q-axis direction. In previous papers, it was shown with 2D-FEM that the proposed motor can generate the suspension force effectively, because the suspension flux does not pass through the permanent magnets. This paper introduces basic characteristics of torque and suspension force in the proposed motor with test results of a prototype machine.","PeriodicalId":211729,"journal":{"name":"2007 International Conference on Electrical Machines and Systems (ICEMS)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125593029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Irreversible demagnetization which occurs in permanent magnet (PM) due to high temperature is main issue in design of traction motor for hybrid electric vehicle. In order to prevent irreversible demagnetization, eddy current loss in PM should be minimized. This paper deals with the optimum design to reduce eddy current loss in PM. Indirect method is used to instead of direct calculation of eddy current loss which uses 3D transient magnetic field analysis. To estimate eddy current loss indirectly, magneto-static field analysis is employed and the obtained flux density variation in PM is used based on the fact that eddy current loss is proportional to square of flux density and frequency. Response surface methodology coupled with design of experiment is used for optimum design in the objective function of peak-peak value and total harmonic distortion of flux density variation in PM Motor design process ensuring minimum variation of flux density in PM is presented and a transient analysis is used for verification of optimum design.
{"title":"Optimum design for eddy current reduction in permanent magnet to prevent irreversible demagnetization","authors":"Jae-Woo Jung, Sang-Ho Lee, Jung-Pyo Hong, Kinam Kim, Hyoungjun Cho, Sanghoon Moon","doi":"10.1109/ICEMS.2007.4412226","DOIUrl":"https://doi.org/10.1109/ICEMS.2007.4412226","url":null,"abstract":"Irreversible demagnetization which occurs in permanent magnet (PM) due to high temperature is main issue in design of traction motor for hybrid electric vehicle. In order to prevent irreversible demagnetization, eddy current loss in PM should be minimized. This paper deals with the optimum design to reduce eddy current loss in PM. Indirect method is used to instead of direct calculation of eddy current loss which uses 3D transient magnetic field analysis. To estimate eddy current loss indirectly, magneto-static field analysis is employed and the obtained flux density variation in PM is used based on the fact that eddy current loss is proportional to square of flux density and frequency. Response surface methodology coupled with design of experiment is used for optimum design in the objective function of peak-peak value and total harmonic distortion of flux density variation in PM Motor design process ensuring minimum variation of flux density in PM is presented and a transient analysis is used for verification of optimum design.","PeriodicalId":211729,"journal":{"name":"2007 International Conference on Electrical Machines and Systems (ICEMS)","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127234019","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2007-12-26DOI: 10.1109/ICEMS12746.2007.4412293
Jinqi Ren, Yao-hua Li
Due to the dynamic end effect, the parameters of SLIM (single sided Linear induction motor) can vary greatly during the operation stage, and cannot be obtained accurately through offline parameter identification method. An adjustable dynamic motor model based on state space equations of LIM is established and a new online identification method based on MRAS is presented, magnetizing inductance of LIM under moving condition can be calculated accurately. The algorithm is validated by simulation and experimental results and show good convergence ability and calculation accuracy. The parameter identification result is in agreement with the LIM dynamic characteristics and the output current of regulated model is almost identical to that of the real motor.
{"title":"MRAS based online magnetizing inductance estimation of linear induction motor","authors":"Jinqi Ren, Yao-hua Li","doi":"10.1109/ICEMS12746.2007.4412293","DOIUrl":"https://doi.org/10.1109/ICEMS12746.2007.4412293","url":null,"abstract":"Due to the dynamic end effect, the parameters of SLIM (single sided Linear induction motor) can vary greatly during the operation stage, and cannot be obtained accurately through offline parameter identification method. An adjustable dynamic motor model based on state space equations of LIM is established and a new online identification method based on MRAS is presented, magnetizing inductance of LIM under moving condition can be calculated accurately. The algorithm is validated by simulation and experimental results and show good convergence ability and calculation accuracy. The parameter identification result is in agreement with the LIM dynamic characteristics and the output current of regulated model is almost identical to that of the real motor.","PeriodicalId":211729,"journal":{"name":"2007 International Conference on Electrical Machines and Systems (ICEMS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131217265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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