Pub Date : 2001-08-18DOI: 10.1109/ICEMS.2001.970709
Chen Li-an, Zhang Peiming
The various faults of motor like short circuited and overload fault can be simulated by the Simulink and Power System Blockset of MATLAB. By researching the instantaneous procedure of the motor faults, protective methods which are more reliable and safer can be provided.
利用MATLAB中的Simulink和Power System Blockset可以对电动机的短路、过载等各种故障进行仿真。通过对电机故障瞬间过程的研究，可以提供更可靠、更安全的保护方法。
{"title":"Simulation of motor faults and protections based on MATLAB","authors":"Chen Li-an, Zhang Peiming","doi":"10.1109/ICEMS.2001.970709","DOIUrl":"https://doi.org/10.1109/ICEMS.2001.970709","url":null,"abstract":"The various faults of motor like short circuited and overload fault can be simulated by the Simulink and Power System Blockset of MATLAB. By researching the instantaneous procedure of the motor faults, protective methods which are more reliable and safer can be provided.","PeriodicalId":143007,"journal":{"name":"ICEMS'2001. Proceedings of the Fifth International Conference on Electrical Machines and Systems (IEEE Cat. No.01EX501)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117173299","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 : 2001-08-18DOI: 10.1109/ICEMS.2001.970690
Cao Zhi-tong, Chen Hongping, H. Guoguang, E. Ritchie
The fault of broken rotor bars in a three-phase induction motor is diagnosed by using the wavelet multi-resolution analysis in this paper. Daubechies wavelet is selected as the wavelet base, and the wavelet coefficient is obtained from the wavelet transform of the current signal of the faulty induction motor. The wavelet reconstruction of a single branch is then processed. This is the signal in each frequency branch as a function of time. A rotor fault in the induction motor is clearly identified from the distinguishing current characteristics on the high frequency branch, compared with the no fault condition.
{"title":"Rotor fault diagnosis of induction motor based on wavelet reconstruction","authors":"Cao Zhi-tong, Chen Hongping, H. Guoguang, E. Ritchie","doi":"10.1109/ICEMS.2001.970690","DOIUrl":"https://doi.org/10.1109/ICEMS.2001.970690","url":null,"abstract":"The fault of broken rotor bars in a three-phase induction motor is diagnosed by using the wavelet multi-resolution analysis in this paper. Daubechies wavelet is selected as the wavelet base, and the wavelet coefficient is obtained from the wavelet transform of the current signal of the faulty induction motor. The wavelet reconstruction of a single branch is then processed. This is the signal in each frequency branch as a function of time. A rotor fault in the induction motor is clearly identified from the distinguishing current characteristics on the high frequency branch, compared with the no fault condition.","PeriodicalId":143007,"journal":{"name":"ICEMS'2001. Proceedings of the Fifth International Conference on Electrical Machines and Systems (IEEE Cat. No.01EX501)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116797884","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 : 2001-08-18DOI: 10.1109/ICEMS.2001.970755
Song Junying, Chen Yunping, L. Dichen, Huang Xianfeng, Xie Chunlin
An asynchronized synchronous generator's (ASG) nonlinear state space equations, including the cycloconverter's frequency adjusting process, are put forward. According to the state equations, the static stability of an ASG is analyzed, and the relation between the stability and the magnifying coefficient and the damping coefficient is also discussed.
{"title":"Static stability of asynchronized synchronous generator for power system","authors":"Song Junying, Chen Yunping, L. Dichen, Huang Xianfeng, Xie Chunlin","doi":"10.1109/ICEMS.2001.970755","DOIUrl":"https://doi.org/10.1109/ICEMS.2001.970755","url":null,"abstract":"An asynchronized synchronous generator's (ASG) nonlinear state space equations, including the cycloconverter's frequency adjusting process, are put forward. According to the state equations, the static stability of an ASG is analyzed, and the relation between the stability and the magnifying coefficient and the damping coefficient is also discussed.","PeriodicalId":143007,"journal":{"name":"ICEMS'2001. Proceedings of the Fifth International Conference on Electrical Machines and Systems (IEEE Cat. No.01EX501)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116839990","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 : 2001-08-18DOI: 10.1109/ICEMS.2001.971859
Zhang Fengge, Wang Zheng, Wang Fengxiang
Two main types of rotor structure used in doubly-fed brushless machine (DFBM) are the cage and ALA (axially laminated anisotropy) rotors. In order to investigate the effect of different rotor structures on the dynamic characteristic of DFBM, this paper presents the comparative study results between the ALA reluctance rotor and cage rotor machine. It is indicated that the DFBM with cage rotor has better starting characteristic, however, the DFBM with ALA rotor is provided with fine drag-in and dynamic response ability.
{"title":"Open-loop dynamic characteristic comparison of doubly-fed brushless machine with ALA and cage rotor","authors":"Zhang Fengge, Wang Zheng, Wang Fengxiang","doi":"10.1109/ICEMS.2001.971859","DOIUrl":"https://doi.org/10.1109/ICEMS.2001.971859","url":null,"abstract":"Two main types of rotor structure used in doubly-fed brushless machine (DFBM) are the cage and ALA (axially laminated anisotropy) rotors. In order to investigate the effect of different rotor structures on the dynamic characteristic of DFBM, this paper presents the comparative study results between the ALA reluctance rotor and cage rotor machine. It is indicated that the DFBM with cage rotor has better starting characteristic, however, the DFBM with ALA rotor is provided with fine drag-in and dynamic response ability.","PeriodicalId":143007,"journal":{"name":"ICEMS'2001. Proceedings of the Fifth International Conference on Electrical Machines and Systems (IEEE Cat. No.01EX501)","volume":"231 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115325708","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 : 2001-08-18DOI: 10.1109/ICEMS.2001.970616
Youn-Ok Choi, Kang-Yeon Lee, K. Seo, Gi-bum Kim, Byung-Ho Jung, G. Cho, H. Baek, Sam-Yong Jeong
Direct torque control (DTC) of an AC motor has the fast torque and flux dynamic responses even though it has very simple scheme to implement. However, DTC do not show good performance at low speed range with conventional open loop stator flux observer when stator resistance varied. Therefore, authors propose a new nonlinear stator flux observer in order to estimate the stator flux of induction motor at low speed and show its simulation results.
{"title":"Performance analysis of the DTC using a closed loop stator flux observer for induction motor in the low speed range","authors":"Youn-Ok Choi, Kang-Yeon Lee, K. Seo, Gi-bum Kim, Byung-Ho Jung, G. Cho, H. Baek, Sam-Yong Jeong","doi":"10.1109/ICEMS.2001.970616","DOIUrl":"https://doi.org/10.1109/ICEMS.2001.970616","url":null,"abstract":"Direct torque control (DTC) of an AC motor has the fast torque and flux dynamic responses even though it has very simple scheme to implement. However, DTC do not show good performance at low speed range with conventional open loop stator flux observer when stator resistance varied. Therefore, authors propose a new nonlinear stator flux observer in order to estimate the stator flux of induction motor at low speed and show its simulation results.","PeriodicalId":143007,"journal":{"name":"ICEMS'2001. Proceedings of the Fifth International Conference on Electrical Machines and Systems (IEEE Cat. No.01EX501)","volume":"123 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123249511","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 : 2001-08-18DOI: 10.1109/ICEMS.2001.970677
Du Lin, Sun Caixin, Liao Ruijin, Li Jian, Z. Quan
Partial discharge (PD) testing is an effective means to find the internal insulation faults of generators and the acquired signal is the basis for further signal processing and insulation diagnosis. This paper presents the basic scheme of generator PD on-line detection and processing principle of data acquisition flow. A computer based system for digital acquisition, storage of the PD signal is described, the FFT analysis, FIR filter and other processing methods are illustrated. The methods of assessment for the digital measurement system are also illustrated.
{"title":"Digital measurement system for generator on-line PD monitoring system","authors":"Du Lin, Sun Caixin, Liao Ruijin, Li Jian, Z. Quan","doi":"10.1109/ICEMS.2001.970677","DOIUrl":"https://doi.org/10.1109/ICEMS.2001.970677","url":null,"abstract":"Partial discharge (PD) testing is an effective means to find the internal insulation faults of generators and the acquired signal is the basis for further signal processing and insulation diagnosis. This paper presents the basic scheme of generator PD on-line detection and processing principle of data acquisition flow. A computer based system for digital acquisition, storage of the PD signal is described, the FFT analysis, FIR filter and other processing methods are illustrated. The methods of assessment for the digital measurement system are also illustrated.","PeriodicalId":143007,"journal":{"name":"ICEMS'2001. Proceedings of the Fifth International Conference on Electrical Machines and Systems (IEEE Cat. No.01EX501)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129946224","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 : 2001-08-18DOI: 10.1109/ICEMS.2001.970752
D. Flockermann, S. Kulig
In this paper the design of a turbogenerator with high voltage stator winding is presented. In distinction from conventional techniques the stator winding is not built with isolated bars. For this concept, common high voltage cables are used. Therefore it is possible to raise the stator voltage from 110 kV to 400 kV. The advantage of this concept is that the transformer is no longer necessary. The conclusion of this paper is that it is possible to design a turbogenerator with high voltage stator windings, but the new machine is much larger than a common one. Furthermore the efficiency is lower (0.6% resp. 2.3%) than for a conventional machine because of skin effect losses in the cables.
{"title":"Turbogenerator with high voltage stator windings","authors":"D. Flockermann, S. Kulig","doi":"10.1109/ICEMS.2001.970752","DOIUrl":"https://doi.org/10.1109/ICEMS.2001.970752","url":null,"abstract":"In this paper the design of a turbogenerator with high voltage stator winding is presented. In distinction from conventional techniques the stator winding is not built with isolated bars. For this concept, common high voltage cables are used. Therefore it is possible to raise the stator voltage from 110 kV to 400 kV. The advantage of this concept is that the transformer is no longer necessary. The conclusion of this paper is that it is possible to design a turbogenerator with high voltage stator windings, but the new machine is much larger than a common one. Furthermore the efficiency is lower (0.6% resp. 2.3%) than for a conventional machine because of skin effect losses in the cables.","PeriodicalId":143007,"journal":{"name":"ICEMS'2001. Proceedings of the Fifth International Conference on Electrical Machines and Systems (IEEE Cat. No.01EX501)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130350883","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 : 2001-08-18DOI: 10.1109/ICEMS.2001.970754
F. Yanfang, W. Yibo, Chao Qin
The method of wind power modeling, stability analysis and calculation in wind-hydro hybrid power systems is described by the authors in this paper. A case study of wind-hydro hybrid power system in China's Aletai region, Buerjin County, Xinjiang Province is also presented.
{"title":"Wind-hydro hybrid power system stability analysis","authors":"F. Yanfang, W. Yibo, Chao Qin","doi":"10.1109/ICEMS.2001.970754","DOIUrl":"https://doi.org/10.1109/ICEMS.2001.970754","url":null,"abstract":"The method of wind power modeling, stability analysis and calculation in wind-hydro hybrid power systems is described by the authors in this paper. A case study of wind-hydro hybrid power system in China's Aletai region, Buerjin County, Xinjiang Province is also presented.","PeriodicalId":143007,"journal":{"name":"ICEMS'2001. Proceedings of the Fifth International Conference on Electrical Machines and Systems (IEEE Cat. No.01EX501)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130505757","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 : 2001-08-18DOI: 10.1109/ICEMS.2001.971854
Jia Haolai, Chen Yan, Wang Zhenmin
In the paper, a neural network torque model of a switched reluctance motor (SRM) is established, based on the merits of the backpropagation (BP) neural network in the area of modeling and control of nonlinear systems. The simulation results show that the torque model based on BP-neural network is more robust and adaptive, and can reflect the working properties of SRM more accuracy than the local linearization torque model.
{"title":"A torque model study of switched reluctance motor using BP neural network","authors":"Jia Haolai, Chen Yan, Wang Zhenmin","doi":"10.1109/ICEMS.2001.971854","DOIUrl":"https://doi.org/10.1109/ICEMS.2001.971854","url":null,"abstract":"In the paper, a neural network torque model of a switched reluctance motor (SRM) is established, based on the merits of the backpropagation (BP) neural network in the area of modeling and control of nonlinear systems. The simulation results show that the torque model based on BP-neural network is more robust and adaptive, and can reflect the working properties of SRM more accuracy than the local linearization torque model.","PeriodicalId":143007,"journal":{"name":"ICEMS'2001. Proceedings of the Fifth International Conference on Electrical Machines and Systems (IEEE Cat. No.01EX501)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130408111","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 : 2001-08-18DOI: 10.1109/ICEMS.2001.971860
Wang Fengxiang, Zheng Qi-shi, Wang Baoguo
This paper introduces the operation principle of bearingless motors. The electromagnetic torque and magnetic levitation force of a bearingless motor with four rotor structures have been calculated and analyzed by means of finite element analysis. A new type of rotor structure is proposed based on the comparative study on torque and levitation force for different rotor structures.
{"title":"Torque and levitation force comparison of bearingless motor with different rotor structures","authors":"Wang Fengxiang, Zheng Qi-shi, Wang Baoguo","doi":"10.1109/ICEMS.2001.971860","DOIUrl":"https://doi.org/10.1109/ICEMS.2001.971860","url":null,"abstract":"This paper introduces the operation principle of bearingless motors. The electromagnetic torque and magnetic levitation force of a bearingless motor with four rotor structures have been calculated and analyzed by means of finite element analysis. A new type of rotor structure is proposed based on the comparative study on torque and levitation force for different rotor structures.","PeriodicalId":143007,"journal":{"name":"ICEMS'2001. Proceedings of the Fifth International Conference on Electrical Machines and Systems (IEEE Cat. No.01EX501)","volume":"07 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129821885","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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