Pub Date : 1993-06-21DOI: 10.1109/PAPCON.1993.255822
R. Olsson
Feedback tachometer generators have been used in the pulp and paper industry for decades. The author briefly traces historical trends and developments in an effort to determine the needs of the industry today. The electrical evolution of feedback tachometer generators from inaccurate analog devices to precise digital devices has improved drive system accuracy and stability. Changes have also occurred in the mechanical configurations to improve reliability. The latest trend is toward higher resolution of up to 2048 pulses per revolution and mechanical designs that eliminate failure prone components. Six case histories are included that show how today's designs solve problems, improve performance, and increase reliability. Included in these case histories are modular designs and shaft mounted designs.<>
{"title":"Trends and developments in feedback devices for adjustable speed drives","authors":"R. Olsson","doi":"10.1109/PAPCON.1993.255822","DOIUrl":"https://doi.org/10.1109/PAPCON.1993.255822","url":null,"abstract":"Feedback tachometer generators have been used in the pulp and paper industry for decades. The author briefly traces historical trends and developments in an effort to determine the needs of the industry today. The electrical evolution of feedback tachometer generators from inaccurate analog devices to precise digital devices has improved drive system accuracy and stability. Changes have also occurred in the mechanical configurations to improve reliability. The latest trend is toward higher resolution of up to 2048 pulses per revolution and mechanical designs that eliminate failure prone components. Six case histories are included that show how today's designs solve problems, improve performance, and increase reliability. Included in these case histories are modular designs and shaft mounted designs.<<ETX>>","PeriodicalId":129476,"journal":{"name":"Conference Record of 1993 Annual Pulp and Paper Industry Technical Conference","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131708191","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 : 1993-06-21DOI: 10.1109/PAPCON.1993.255815
E. Owen
Many power engineers have struggled with ideas of standard and special synchronous motor designs as those concepts relate to LCI (load commutators inverter) drives. Today many engineers accept the premise that LCI motors belong in a category unto themselves, different from 'standard' synchronous motors. Some points of view bearing upon this theme are discussed. Operating principles, application methodologies and criteria, machine design, and field experience are reviewed. Some concepts of standard motor design are described and compared to corresponding aspects of LCI motor designs.<>
{"title":"Synchronous motors for AC adjustable-speed drives","authors":"E. Owen","doi":"10.1109/PAPCON.1993.255815","DOIUrl":"https://doi.org/10.1109/PAPCON.1993.255815","url":null,"abstract":"Many power engineers have struggled with ideas of standard and special synchronous motor designs as those concepts relate to LCI (load commutators inverter) drives. Today many engineers accept the premise that LCI motors belong in a category unto themselves, different from 'standard' synchronous motors. Some points of view bearing upon this theme are discussed. Operating principles, application methodologies and criteria, machine design, and field experience are reviewed. Some concepts of standard motor design are described and compared to corresponding aspects of LCI motor designs.<<ETX>>","PeriodicalId":129476,"journal":{"name":"Conference Record of 1993 Annual Pulp and Paper Industry Technical Conference","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129230506","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 : 1993-06-21DOI: 10.1109/PAPCON.1993.255802
D. L. Swindler
A number of vacuum and SF/sub 6/ circuit breaker characteristics are reviewed, and field experience is discussed. The purpose of this effort is to provide the engineer with useful information for system planning. Outdoor and indoor application recommendations are given.<>
{"title":"Application of SF/sub 6/ and vacuum medium voltage circuit breakers","authors":"D. L. Swindler","doi":"10.1109/PAPCON.1993.255802","DOIUrl":"https://doi.org/10.1109/PAPCON.1993.255802","url":null,"abstract":"A number of vacuum and SF/sub 6/ circuit breaker characteristics are reviewed, and field experience is discussed. The purpose of this effort is to provide the engineer with useful information for system planning. Outdoor and indoor application recommendations are given.<<ETX>>","PeriodicalId":129476,"journal":{"name":"Conference Record of 1993 Annual Pulp and Paper Industry Technical Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125962007","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 : 1993-06-21DOI: 10.1109/PAPCON.1993.255819
J.R. Thompson
A diagnostic networking base system installation is described. It has been in service for one year. The purpose of this effect is to provide information on what one paper mill has accomplished in the diagnostic area and not the specifics of 'how' it was done.<>
{"title":"Integrated paper machine diagnostic system","authors":"J.R. Thompson","doi":"10.1109/PAPCON.1993.255819","DOIUrl":"https://doi.org/10.1109/PAPCON.1993.255819","url":null,"abstract":"A diagnostic networking base system installation is described. It has been in service for one year. The purpose of this effect is to provide information on what one paper mill has accomplished in the diagnostic area and not the specifics of 'how' it was done.<<ETX>>","PeriodicalId":129476,"journal":{"name":"Conference Record of 1993 Annual Pulp and Paper Industry Technical Conference","volume":"2016 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125645087","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 : 1993-06-21DOI: 10.1109/PAPCON.1993.255797
R. Valdes
A practical view of high-voltage insulation encountered mainly in rotating electrical machines is presented, with only the essential mathematics in elementary form. Insulation fundamentals are discussed, and specific insulation materials and applications are described.<>
{"title":"Fundamentals of high voltage insulation","authors":"R. Valdes","doi":"10.1109/PAPCON.1993.255797","DOIUrl":"https://doi.org/10.1109/PAPCON.1993.255797","url":null,"abstract":"A practical view of high-voltage insulation encountered mainly in rotating electrical machines is presented, with only the essential mathematics in elementary form. Insulation fundamentals are discussed, and specific insulation materials and applications are described.<<ETX>>","PeriodicalId":129476,"journal":{"name":"Conference Record of 1993 Annual Pulp and Paper Industry Technical Conference","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133609364","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 : 1993-06-21DOI: 10.1109/PAPCON.1993.255817
L. Manz
The need for not only thinking about what additional features are required when specifying an AC motor for use on an adjustable-speed drive (ASD), but also for considering the possibility of relaxing some of the requirements historically specified is discussed. How cost is added and benefits are sacrificed if some of these features are specified when not necessary is examined.<>
{"title":"Specifying a motor for use on an adjustable speed drive from the motor designer's point of view","authors":"L. Manz","doi":"10.1109/PAPCON.1993.255817","DOIUrl":"https://doi.org/10.1109/PAPCON.1993.255817","url":null,"abstract":"The need for not only thinking about what additional features are required when specifying an AC motor for use on an adjustable-speed drive (ASD), but also for considering the possibility of relaxing some of the requirements historically specified is discussed. How cost is added and benefits are sacrificed if some of these features are specified when not necessary is examined.<<ETX>>","PeriodicalId":129476,"journal":{"name":"Conference Record of 1993 Annual Pulp and Paper Industry Technical Conference","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122164253","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}
An effort to employ artificial intelligence (AI) in the form of a harmonics analysis expert system (HAES) is reported. The resulting PC-based software progrem has captured the knowledge of expert power system engineers in a rule base which can be applied to information about the topology, power signature, operating practices symptoms, equipment type and ratings, and chronology of system development to diagnose the power system for harmonics-caused problems.<>
{"title":"Expert system for analysis of electric power system harmonics","authors":"D. Shipp, M. Swartz, W. Vilcheck, N. Woodley","doi":"10.1109/2943.384625","DOIUrl":"https://doi.org/10.1109/2943.384625","url":null,"abstract":"An effort to employ artificial intelligence (AI) in the form of a harmonics analysis expert system (HAES) is reported. The resulting PC-based software progrem has captured the knowledge of expert power system engineers in a rule base which can be applied to information about the topology, power signature, operating practices symptoms, equipment type and ratings, and chronology of system development to diagnose the power system for harmonics-caused problems.<<ETX>>","PeriodicalId":129476,"journal":{"name":"Conference Record of 1993 Annual Pulp and Paper Industry Technical Conference","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130145153","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 : 1993-06-21DOI: 10.1109/PAPCON.1993.255813
A. Bonnett
Bearing failures have accounted for an increased percentage of motor failures. This is due in part to improved stator and rotor construction, which may result in the bearings being the weak link. Also many bearings are being operated at increased loads, temperatures, and speeds. The environment is another major factor affecting bearing life. All too often the failed bearing is replaced without proper identification of the root cause of the failure. Hence, proper corrective actions may not be taken to minimize or avoid future failures, and extend bearing life. A methodology for identifying the cause of failure for antifriction bearings used in electric motors using antifriction bearings is presented.<>
{"title":"Cause and analysis of anti-friction bearing failures in AC induction motors","authors":"A. Bonnett","doi":"10.1109/PAPCON.1993.255813","DOIUrl":"https://doi.org/10.1109/PAPCON.1993.255813","url":null,"abstract":"Bearing failures have accounted for an increased percentage of motor failures. This is due in part to improved stator and rotor construction, which may result in the bearings being the weak link. Also many bearings are being operated at increased loads, temperatures, and speeds. The environment is another major factor affecting bearing life. All too often the failed bearing is replaced without proper identification of the root cause of the failure. Hence, proper corrective actions may not be taken to minimize or avoid future failures, and extend bearing life. A methodology for identifying the cause of failure for antifriction bearings used in electric motors using antifriction bearings is presented.<<ETX>>","PeriodicalId":129476,"journal":{"name":"Conference Record of 1993 Annual Pulp and Paper Industry Technical Conference","volume":"18 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120992676","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 : 1993-06-21DOI: 10.1109/PAPCON.1993.255820
R. Hughey
A description of how one company is using the small expert system approach is given. Expert systems are described and reasons for using them are given. A comparison between large systems and small systems is also given.<>
{"title":"Expert systems in manufacturing","authors":"R. Hughey","doi":"10.1109/PAPCON.1993.255820","DOIUrl":"https://doi.org/10.1109/PAPCON.1993.255820","url":null,"abstract":"A description of how one company is using the small expert system approach is given. Expert systems are described and reasons for using them are given. A comparison between large systems and small systems is also given.<<ETX>>","PeriodicalId":129476,"journal":{"name":"Conference Record of 1993 Annual Pulp and Paper Industry Technical Conference","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134261994","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 : 1993-06-21DOI: 10.1109/PAPCON.1993.255799
K.L. Box
Low-voltage motor control centers (LVMCCs) built prior to the 1980s may have inadequate bus bracing. Unit substations are being expanded in order to meet the demands of an expanding electrical distribution system. The electrical system requirements in many pulp and paper mills are being enlarged with greater kVA capacity transformers. Consequently, the available RMS symmetrical fault currents are likely to be in excess of the original bus bracing rating for the LVMCC. A reliable and cost-effective means of upgrading bus bracing in LVMCCs is discussed.<>
{"title":"Upgrading bus bracing in low voltage motor control centers","authors":"K.L. Box","doi":"10.1109/PAPCON.1993.255799","DOIUrl":"https://doi.org/10.1109/PAPCON.1993.255799","url":null,"abstract":"Low-voltage motor control centers (LVMCCs) built prior to the 1980s may have inadequate bus bracing. Unit substations are being expanded in order to meet the demands of an expanding electrical distribution system. The electrical system requirements in many pulp and paper mills are being enlarged with greater kVA capacity transformers. Consequently, the available RMS symmetrical fault currents are likely to be in excess of the original bus bracing rating for the LVMCC. A reliable and cost-effective means of upgrading bus bracing in LVMCCs is discussed.<<ETX>>","PeriodicalId":129476,"journal":{"name":"Conference Record of 1993 Annual Pulp and Paper Industry Technical Conference","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121282734","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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