Pub Date : 2001-08-18DOI: 10.1109/ICEMS.2001.970626
Cheng Shiyuan
In this paper, ventilation systems of a large hydro-generator are analyzed. A new method named network analyses is presented to calculate ventilation circuits. The general equations are obtained by the electrical network theory. The equations are solved numerically with the successive iterative method. A general program of FORTRAN language is worked out. The ventilation system of the hydrogenerator in Sanxia power station is calculated with the network analyses method.
{"title":"Network analyses of ventilation system for large hydrogenerator","authors":"Cheng Shiyuan","doi":"10.1109/ICEMS.2001.970626","DOIUrl":"https://doi.org/10.1109/ICEMS.2001.970626","url":null,"abstract":"In this paper, ventilation systems of a large hydro-generator are analyzed. A new method named network analyses is presented to calculate ventilation circuits. The general equations are obtained by the electrical network theory. The equations are solved numerically with the successive iterative method. A general program of FORTRAN language is worked out. The ventilation system of the hydrogenerator in Sanxia power station is calculated with the network analyses method.","PeriodicalId":143007,"journal":{"name":"ICEMS'2001. Proceedings of the Fifth International Conference on Electrical Machines and Systems (IEEE Cat. No.01EX501)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2001-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130085529","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.2001.970618
Lu Xianliang, Wu Hanguang
This paper presents the maximum efficiency controlling strategy for induction machine. The Theoretical and experimental study have been done to investigate the relationship between the highest efficiency and the rate of iron loss to copper loss in this paper. The significant equations have been derived and highest efficiency controlling algorithm will be introduced. The method to get control parameters from experiment is also discussed here.
{"title":"Maximum efficiency control strategy for induction machine","authors":"Lu Xianliang, Wu Hanguang","doi":"10.1109/ICEMS.2001.970618","DOIUrl":"https://doi.org/10.1109/ICEMS.2001.970618","url":null,"abstract":"This paper presents the maximum efficiency controlling strategy for induction machine. The Theoretical and experimental study have been done to investigate the relationship between the highest efficiency and the rate of iron loss to copper loss in this paper. The significant equations have been derived and highest efficiency controlling algorithm will be introduced. The method to get control parameters from experiment is also discussed here.","PeriodicalId":143007,"journal":{"name":"ICEMS'2001. Proceedings of the Fifth International Conference on Electrical Machines and Systems (IEEE Cat. No.01EX501)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2001-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121096095","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.2001.970739
Zhang Junhong, W. Hongfang
In this paper, a novel welding inverter power source system with constant current output characteristics is proposed, in order to get an independent control of spatter control, weld formation and arc length stability in CO/sub 2/ Gas Metal Arc Welding. In the system, the waveform fuzzy logic control method is built to guarantee the arc length stability. Some experiments are carried out with the designed system and the results are provided and discussed.
{"title":"A novel welding inverter power source system with constant current output characteristic based on fuzzy logic control","authors":"Zhang Junhong, W. Hongfang","doi":"10.1109/ICEMS.2001.970739","DOIUrl":"https://doi.org/10.1109/ICEMS.2001.970739","url":null,"abstract":"In this paper, a novel welding inverter power source system with constant current output characteristics is proposed, in order to get an independent control of spatter control, weld formation and arc length stability in CO/sub 2/ Gas Metal Arc Welding. In the system, the waveform fuzzy logic control method is built to guarantee the arc length stability. Some experiments are carried out with the designed system and the results are provided and discussed.","PeriodicalId":143007,"journal":{"name":"ICEMS'2001. Proceedings of the Fifth International Conference on Electrical Machines and Systems (IEEE Cat. No.01EX501)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2001-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122342272","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.2001.970760
Zhu Qing, Zhou Youqing, Hu Juan
Superconducting techniques will be used in electrical power systems widely. Installing a high temperature superconducting fault current limiter (HSCFCL) in electrical power systems is an effective measure to limit the fault short circuit current and to reduce breaking capacity of the circuit breaker. In this paper, the scope of critical current of a superconductor is defined. A rectifier type HSCFCL is selected. The fault current-limiting duration of HSCFCL is determined and its principle is sized up. At the end of this paper, the creative characteristics of this scheme are raised.
{"title":"The research of a rectifier type high temperature superconducting fault current limiter","authors":"Zhu Qing, Zhou Youqing, Hu Juan","doi":"10.1109/ICEMS.2001.970760","DOIUrl":"https://doi.org/10.1109/ICEMS.2001.970760","url":null,"abstract":"Superconducting techniques will be used in electrical power systems widely. Installing a high temperature superconducting fault current limiter (HSCFCL) in electrical power systems is an effective measure to limit the fault short circuit current and to reduce breaking capacity of the circuit breaker. In this paper, the scope of critical current of a superconductor is defined. A rectifier type HSCFCL is selected. The fault current-limiting duration of HSCFCL is determined and its principle is sized up. At the end of this paper, the creative characteristics of this scheme are raised.","PeriodicalId":143007,"journal":{"name":"ICEMS'2001. Proceedings of the Fifth International Conference on Electrical Machines and Systems (IEEE Cat. No.01EX501)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2001-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122357789","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.2001.970723
Lin Chengwu, Z. Jianguang, Wang Fengxiang
This paper puts forward a multi-functional power converter design based on 8XCI96MC single-chip computer control. The converter subtly integrates a rectifier, chopper and inverter, which not only reduces cost and size but also extends the functions of the power converter. Four different operational models of the converter are analyzed, and some experiment results are presented in the paper.
{"title":"A multi-functional converter controlled by 8XC196MC","authors":"Lin Chengwu, Z. Jianguang, Wang Fengxiang","doi":"10.1109/ICEMS.2001.970723","DOIUrl":"https://doi.org/10.1109/ICEMS.2001.970723","url":null,"abstract":"This paper puts forward a multi-functional power converter design based on 8XCI96MC single-chip computer control. The converter subtly integrates a rectifier, chopper and inverter, which not only reduces cost and size but also extends the functions of the power converter. Four different operational models of the converter are analyzed, and some experiment results are presented in the paper.","PeriodicalId":143007,"journal":{"name":"ICEMS'2001. Proceedings of the Fifth International Conference on Electrical Machines and Systems (IEEE Cat. No.01EX501)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2001-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125696403","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.2001.970637
X.A. Morera, A. Espinosa
A contactor is a switching device, usually operated by an electromagnet. They are widely used to operate relays that turn on electric motors and other electrical apparatus. The main components of a contactor are contacts, the springs, the magnets and a coil, so the designer of contactors needs to predict their mechanical and electrical performance. This is a coupled problem of electromagnetic fields, transient circuits and mechanical movement. This paper presents a methodology for dynamic analysis of AC cotactor, the model is based on the electro-magnetic system equations and mechanical dynamic properties of a real contactor.
{"title":"Modeling of contact bounce of AC contactor","authors":"X.A. Morera, A. Espinosa","doi":"10.1109/ICEMS.2001.970637","DOIUrl":"https://doi.org/10.1109/ICEMS.2001.970637","url":null,"abstract":"A contactor is a switching device, usually operated by an electromagnet. They are widely used to operate relays that turn on electric motors and other electrical apparatus. The main components of a contactor are contacts, the springs, the magnets and a coil, so the designer of contactors needs to predict their mechanical and electrical performance. This is a coupled problem of electromagnetic fields, transient circuits and mechanical movement. This paper presents a methodology for dynamic analysis of AC cotactor, the model is based on the electro-magnetic system equations and mechanical dynamic properties of a real contactor.","PeriodicalId":143007,"journal":{"name":"ICEMS'2001. Proceedings of the Fifth International Conference on Electrical Machines and Systems (IEEE Cat. No.01EX501)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2001-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124369755","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.2001.970613
Ying Liming, Chen Yunping, Liu Dicheng, Xu Donghui
The general mathematical model of SEIG under unbalanced conditions was presented in this paper. The model is derived from using symmetrical components theory and the sequence equivalent circuits of the generator. The method avoids lengthy and tedious algebraic derivations. Performance characteristics of a SEIG under unbalanced conditions were analyzed. There is a good agreement between the calculated and experimental measured values.
{"title":"Performance analysis of self-excited induction generators under unbalanced conditions","authors":"Ying Liming, Chen Yunping, Liu Dicheng, Xu Donghui","doi":"10.1109/ICEMS.2001.970613","DOIUrl":"https://doi.org/10.1109/ICEMS.2001.970613","url":null,"abstract":"The general mathematical model of SEIG under unbalanced conditions was presented in this paper. The model is derived from using symmetrical components theory and the sequence equivalent circuits of the generator. The method avoids lengthy and tedious algebraic derivations. Performance characteristics of a SEIG under unbalanced conditions were analyzed. There is a good agreement between the calculated and experimental measured values.","PeriodicalId":143007,"journal":{"name":"ICEMS'2001. Proceedings of the Fifth International Conference on Electrical Machines and Systems (IEEE Cat. No.01EX501)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2001-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124424518","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.2001.970610
Chang-soon Park
Condenser motors are widely used because the motor needs the 1-phase voltage source we have everywhere. The single phase motor creates an elliptical rotating field that may cause some problems such as noise, vibrations and more losses that bring low efficiency and a rise in temperature. This paper describes optimum design of the motor in consideration of the maximum torque, efficiency, swing torque and starting torque for a sewing machine.
{"title":"A study on the efficiency improvement and suppression of rising temperature of the 1-phase condenser motor","authors":"Chang-soon Park","doi":"10.1109/ICEMS.2001.970610","DOIUrl":"https://doi.org/10.1109/ICEMS.2001.970610","url":null,"abstract":"Condenser motors are widely used because the motor needs the 1-phase voltage source we have everywhere. The single phase motor creates an elliptical rotating field that may cause some problems such as noise, vibrations and more losses that bring low efficiency and a rise in temperature. This paper describes optimum design of the motor in consideration of the maximum torque, efficiency, swing torque and starting torque for a sewing machine.","PeriodicalId":143007,"journal":{"name":"ICEMS'2001. Proceedings of the Fifth International Conference on Electrical Machines and Systems (IEEE Cat. No.01EX501)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2001-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128763007","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.2001.971893
J. Mukosiej
The paper presents the problem of calculating the dependence of temperature of different parts of electric machines on changes of thermal resistances in the network branches. The method of equivalent thermal networks and the method of thermal coefficients, whose principles are shown in the paper, were used for analysis. The analysis is illustrated by examples of calculation concerning a totally enclosed motor with a ribbed frame. The calculation example serves to illustrate the dependence of temperature on resistances and to compare the effect of change of different resistances on heating of different machine parts.
{"title":"Effect of thermal resistances on value and temperature distribution of electric machines","authors":"J. Mukosiej","doi":"10.1109/ICEMS.2001.971893","DOIUrl":"https://doi.org/10.1109/ICEMS.2001.971893","url":null,"abstract":"The paper presents the problem of calculating the dependence of temperature of different parts of electric machines on changes of thermal resistances in the network branches. The method of equivalent thermal networks and the method of thermal coefficients, whose principles are shown in the paper, were used for analysis. The analysis is illustrated by examples of calculation concerning a totally enclosed motor with a ribbed frame. The calculation example serves to illustrate the dependence of temperature on resistances and to compare the effect of change of different resistances on heating of different machine parts.","PeriodicalId":143007,"journal":{"name":"ICEMS'2001. Proceedings of the Fifth International Conference on Electrical Machines and Systems (IEEE Cat. No.01EX501)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2001-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129111211","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.2001.971886
Sun Jianzhong, Bai Fengxian, Tang Renyuan
Improvements on an intelligent simulated annealing (ISA) algorithm for the optimal design of electromagnetic devices is investigated in this paper. By using a fuzzy inference method, the ISA can not only reject infeasible design schemes before design calculation, but can also circumscribe the whereabouts of the global optimum and automatically narrow the search scope. In case of making improper decisions in ISA searching, a criterion of recognizing error judgment is developed. The algorithm is applied to the optimal design of induction motors used in electric locomotives, and satisfactory results are achieved.
{"title":"Optimization design of special induction motors using improved intelligent simulated annealing algorithm","authors":"Sun Jianzhong, Bai Fengxian, Tang Renyuan","doi":"10.1109/ICEMS.2001.971886","DOIUrl":"https://doi.org/10.1109/ICEMS.2001.971886","url":null,"abstract":"Improvements on an intelligent simulated annealing (ISA) algorithm for the optimal design of electromagnetic devices is investigated in this paper. By using a fuzzy inference method, the ISA can not only reject infeasible design schemes before design calculation, but can also circumscribe the whereabouts of the global optimum and automatically narrow the search scope. In case of making improper decisions in ISA searching, a criterion of recognizing error judgment is developed. The algorithm is applied to the optimal design of induction motors used in electric locomotives, and satisfactory results are achieved.","PeriodicalId":143007,"journal":{"name":"ICEMS'2001. Proceedings of the Fifth International Conference on Electrical Machines and Systems (IEEE Cat. No.01EX501)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2001-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129197131","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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