The details of the methods used in programming a programmable logic controller (PLC) system for improving the roll cooling control on a three-stand aluminium rolling hot finishing mill with a coolant spray system for work roll temperature control of narrow zones across the width of the work rolls are discussed. The operator functions, the programmable controller's handling of data, the program structure, and a detailed description of the program for controlling the sprays are described.<>
{"title":"Programmable controller software aluminium hot mill spray control","authors":"S. Bates","doi":"10.1109/IAS.1990.152365","DOIUrl":"https://doi.org/10.1109/IAS.1990.152365","url":null,"abstract":"The details of the methods used in programming a programmable logic controller (PLC) system for improving the roll cooling control on a three-stand aluminium rolling hot finishing mill with a coolant spray system for work roll temperature control of narrow zones across the width of the work rolls are discussed. The operator functions, the programmable controller's handling of data, the program structure, and a detailed description of the program for controlling the sprays are described.<<ETX>>","PeriodicalId":185839,"journal":{"name":"Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122243826","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}
The auxiliary resonant commutated pole (ARCP), a new power converter topology that fully achieves soft switching without increasing primary device voltage or current ratings, is discussed. The ARCP converter is capable of true pulse-width modulation (PWM) control of each phase. The power circuit relies on the addition of an auxiliary triggered resonant commutation circuit or snubber to commutate the inductive load current from a main diode to an active device, allowing a zero voltage turn-off of the main devices. The auxiliary devices operate in a zero current soft switching mode, thereby requiring minimal current turn-off capability. The operation and control of the ARCP converter are discussed. Its performance is analyzed, and a simulation is presented. It is shown that the ARCP converter is capable of operation at elevated switching frequencies (10-30 kHz), high power levels (200-1000 kW), and high conversion efficiencies. the auxiliary devices will typically account for a 20% increase in the total silicon area of a three-phase power converter.<>
{"title":"The auxiliary resonant commutated pole converter","authors":"R. W. D. Doncker, James Patrick Lyons","doi":"10.1109/IAS.1990.152341","DOIUrl":"https://doi.org/10.1109/IAS.1990.152341","url":null,"abstract":"The auxiliary resonant commutated pole (ARCP), a new power converter topology that fully achieves soft switching without increasing primary device voltage or current ratings, is discussed. The ARCP converter is capable of true pulse-width modulation (PWM) control of each phase. The power circuit relies on the addition of an auxiliary triggered resonant commutation circuit or snubber to commutate the inductive load current from a main diode to an active device, allowing a zero voltage turn-off of the main devices. The auxiliary devices operate in a zero current soft switching mode, thereby requiring minimal current turn-off capability. The operation and control of the ARCP converter are discussed. Its performance is analyzed, and a simulation is presented. It is shown that the ARCP converter is capable of operation at elevated switching frequencies (10-30 kHz), high power levels (200-1000 kW), and high conversion efficiencies. the auxiliary devices will typically account for a 20% increase in the total silicon area of a three-phase power converter.<<ETX>>","PeriodicalId":185839,"journal":{"name":"Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131072720","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}
A DC/DC power converter that is capable of generating high voltage is described. The design employs capacitive energy transfer to accomplish voltage conversion. The converter contains arrays of integrated-circuit power switches and capacitors. A transfer gain of 36 is achieved, making it possible to step up a nominal input of 67.5 V DC to 2430 V DC. The circuit configuration, performance characteristics, and merits of the design are discussed.<>
描述了一种能够产生高压的DC/DC功率变换器。该设计采用电容能量传递实现电压转换。转换器包含集成电路电源开关和电容器阵列。实现了36的传输增益，从而可以将67.5 V DC的标称输入提升到2430 V DC。讨论了电路结构、性能特点和设计的优点。
{"title":"Transformerless DC/DC converter for production of high voltage","authors":"G. Sridharan","doi":"10.1109/IAS.1990.152350","DOIUrl":"https://doi.org/10.1109/IAS.1990.152350","url":null,"abstract":"A DC/DC power converter that is capable of generating high voltage is described. The design employs capacitive energy transfer to accomplish voltage conversion. The converter contains arrays of integrated-circuit power switches and capacitors. A transfer gain of 36 is achieved, making it possible to step up a nominal input of 67.5 V DC to 2430 V DC. The circuit configuration, performance characteristics, and merits of the design are discussed.<<ETX>>","PeriodicalId":185839,"journal":{"name":"Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132382426","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}
A brushless AC servomotor drive has been developed to take advantage of the higher efficiency of IGBT transistors and a novel method for continuous torque-angle compensation in two directions. The drive employs CPU management to provide an extensive array of protection functions. The authors present the philosophy, theory and principles behind this innovative approach to AC servo-drive design and discuss the current loop, current-sensor closed loop, velocity loop, and the performance and protection functions built into the drive.<>
{"title":"New brushless AC servo drive uses isolated gate bipolar power transistors and a CPU, to obtain high dynamic performance with exceptionally high reliability and efficiency","authors":"S. Vlahu","doi":"10.1109/IAS.1990.152259","DOIUrl":"https://doi.org/10.1109/IAS.1990.152259","url":null,"abstract":"A brushless AC servomotor drive has been developed to take advantage of the higher efficiency of IGBT transistors and a novel method for continuous torque-angle compensation in two directions. The drive employs CPU management to provide an extensive array of protection functions. The authors present the philosophy, theory and principles behind this innovative approach to AC servo-drive design and discuss the current loop, current-sensor closed loop, velocity loop, and the performance and protection functions built into the drive.<<ETX>>","PeriodicalId":185839,"journal":{"name":"Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128373463","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}
Optoelectrostatic micromanipulation utilizing the electrostatic force in combination with the optical pressure of a focused laser beam has been used for handling of plant protoplasts and for microinjection of fine latex particles into plant protoplasts. Cabbage or carrot protoplasts were used. Cabbage protoplasts could be moved by the optical pressure at 10 to 80 mu m/s. Using a parallel electrode system, the protoplasts were connected to form a pearl chain. An argon ion laser was then focused on one protoplast at the tip of a pearl chain. All the protoplasts were trapped at the electrode by the dielectrophoretic force. and only the protoplast irradiated by the laser could be separated selectively. Microinjection of 0.2-0.4 mu m latex particles to the cabbages or carrot protoplasts was made using optoelectrostatic micromanipulation. The latex particles were transported to the surface of the protoplasts inside a parallel-plate electrode system. Then a pulsed high voltage was applied several times to inject one latex particle attached on the surface of the protoplast. The injected latex particle could be manipulated inside the protoplast by the optical pressure. The experimental apparatus and the results are reported.<>
{"title":"Opto-electrostatic micro-manipulation of protoplasts and fine particles","authors":"A. Mizuno, K. Hosoi, H. Sakano","doi":"10.1109/IAS.1990.152265","DOIUrl":"https://doi.org/10.1109/IAS.1990.152265","url":null,"abstract":"Optoelectrostatic micromanipulation utilizing the electrostatic force in combination with the optical pressure of a focused laser beam has been used for handling of plant protoplasts and for microinjection of fine latex particles into plant protoplasts. Cabbage or carrot protoplasts were used. Cabbage protoplasts could be moved by the optical pressure at 10 to 80 mu m/s. Using a parallel electrode system, the protoplasts were connected to form a pearl chain. An argon ion laser was then focused on one protoplast at the tip of a pearl chain. All the protoplasts were trapped at the electrode by the dielectrophoretic force. and only the protoplast irradiated by the laser could be separated selectively. Microinjection of 0.2-0.4 mu m latex particles to the cabbages or carrot protoplasts was made using optoelectrostatic micromanipulation. The latex particles were transported to the surface of the protoplasts inside a parallel-plate electrode system. Then a pulsed high voltage was applied several times to inject one latex particle attached on the surface of the protoplast. The injected latex particle could be manipulated inside the protoplast by the optical pressure. The experimental apparatus and the results are reported.<<ETX>>","PeriodicalId":185839,"journal":{"name":"Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134319425","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}
A power electronic VAr generator that provides reactive power compensation for symmetrical and nonsymmetrical nonlinear consumers is described. The control system provides inertial operation of the compensating system. By a stepwise change of the load current, some value of an active power is delivered by the VAr generator to the line during a few AC voltage periods. It is shown that this power electronic system can be used as an active filter for unwanted current harmonics reduction.<>
{"title":"Compensation of the reactive power drawn from the line by nonlinear consumers","authors":"H. Supronowicz, J. Janczak","doi":"10.1109/IAS.1990.152321","DOIUrl":"https://doi.org/10.1109/IAS.1990.152321","url":null,"abstract":"A power electronic VAr generator that provides reactive power compensation for symmetrical and nonsymmetrical nonlinear consumers is described. The control system provides inertial operation of the compensating system. By a stepwise change of the load current, some value of an active power is delivered by the VAr generator to the line during a few AC voltage periods. It is shown that this power electronic system can be used as an active filter for unwanted current harmonics reduction.<<ETX>>","PeriodicalId":185839,"journal":{"name":"Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133464503","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 induction electrohydrodynamic (EHD) pump in a horizontal configuration was built. Different dielectric fluids were compared to establish which produced the best pumping performance. Experimental results show that pumping performance depends on fluid properties, primarily fluid viscosity and electrical conductivity. Pumping velocities as high as 35 cm/s with doped, 100 p.p.m., n-hexane were achieved. This improvement makes induction EHD pumping attractive for certain industrial applications.<>
{"title":"Induction electrohydrodynamic pumping-selecting an optimum working fluid","authors":"B.J. Bohinsky, J. Seyed-Yagoobi","doi":"10.1109/IAS.1990.152277","DOIUrl":"https://doi.org/10.1109/IAS.1990.152277","url":null,"abstract":"An induction electrohydrodynamic (EHD) pump in a horizontal configuration was built. Different dielectric fluids were compared to establish which produced the best pumping performance. Experimental results show that pumping performance depends on fluid properties, primarily fluid viscosity and electrical conductivity. Pumping velocities as high as 35 cm/s with doped, 100 p.p.m., n-hexane were achieved. This improvement makes induction EHD pumping attractive for certain industrial applications.<<ETX>>","PeriodicalId":185839,"journal":{"name":"Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131750538","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}
The magnetic fields produced by the stator windings and induced via the rotor of a composite, cascade induction machine are investigated with simplified operating assumptions. The rotor used is the single-layer, modified cage developed by A. R. W. Broadway and L. Burbridge (see Proc. IEE, vol.117, p.1277-90, 1970). The input and control circuits share the same stator coils. The operation of the machine is dependent upon spatial harmonics of the stator and rotor conductor structures; therefore, the spatial harmonic contents of the excitation and induced fields are determined. A design formula for minimizing low-order, undesirable harmonics produced by the stator coils is presented. The form of the field harmonics and their direction of travel with respect to the rotor are established. Based upon the physical interactions of the rotor fields, a novel steady-state equivalent circuit with two excitation sources is established, along with the form of the requisite coupling factors. Contributions of the harmonic fields to the instantaneous and average torques are considered.<>
在简化的工作假设下，研究了复合串级感应电机的定子绕组产生的经转子感应的磁场。使用的转子是单层，改进笼由A. R. W. Broadway和L. Burbridge(见Proc. IEE, vol.117, p.1277- 90,1970)。输入电路和控制电路共用同一个定子线圈。机器的运行依赖于定子和转子导体结构的空间谐波;因此，确定了激发场和感应场的空间谐波含量。提出了一种使定子线圈产生的低次谐波最小化的设计公式。建立了磁场谐波的形式及其相对于转子的传播方向。基于转子磁场的物理相互作用，建立了一种新型的双励磁源稳态等效电路，并给出了所需耦合因子的形式。考虑了谐波场对瞬时力矩和平均力矩的贡献。
{"title":"Characterization of the brushless, doubly-fed machine by magnetic field analysis","authors":"G. C. Alexander","doi":"10.1109/IAS.1990.152166","DOIUrl":"https://doi.org/10.1109/IAS.1990.152166","url":null,"abstract":"The magnetic fields produced by the stator windings and induced via the rotor of a composite, cascade induction machine are investigated with simplified operating assumptions. The rotor used is the single-layer, modified cage developed by A. R. W. Broadway and L. Burbridge (see Proc. IEE, vol.117, p.1277-90, 1970). The input and control circuits share the same stator coils. The operation of the machine is dependent upon spatial harmonics of the stator and rotor conductor structures; therefore, the spatial harmonic contents of the excitation and induced fields are determined. A design formula for minimizing low-order, undesirable harmonics produced by the stator coils is presented. The form of the field harmonics and their direction of travel with respect to the rotor are established. Based upon the physical interactions of the rotor fields, a novel steady-state equivalent circuit with two excitation sources is established, along with the form of the requisite coupling factors. Contributions of the harmonic fields to the instantaneous and average torques are considered.<<ETX>>","PeriodicalId":185839,"journal":{"name":"Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122532934","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}
A finite-element-based three-dimensional field solution for the magnetically saturable chokes that are used in many industrial electronics systems is presented. The inductances computed based on the finite-element field solution are compared with the estimated nonlinear inductances from actual measurements. The results show the adequacy of the three-dimensional finite-elements simulation. The results of the field solution are used to study the factors that influence the nonlinear characteristics of the chokes, such as the air-gap geometry, the equivalent winding turns and the property of material anisotropy.<>
{"title":"Design of saturable chokes for industrial electronic systems","authors":"H. Tsai, A. Keyhani","doi":"10.1109/IAS.1990.152355","DOIUrl":"https://doi.org/10.1109/IAS.1990.152355","url":null,"abstract":"A finite-element-based three-dimensional field solution for the magnetically saturable chokes that are used in many industrial electronics systems is presented. The inductances computed based on the finite-element field solution are compared with the estimated nonlinear inductances from actual measurements. The results show the adequacy of the three-dimensional finite-elements simulation. The results of the field solution are used to study the factors that influence the nonlinear characteristics of the chokes, such as the air-gap geometry, the equivalent winding turns and the property of material anisotropy.<<ETX>>","PeriodicalId":185839,"journal":{"name":"Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting","volume":"716 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122993234","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}
A vector control system for a slip-frequency controlled induction motor is introduced. The system has a simple structure, fair performance, and convenient operation. It is realized by two single-chip microprocessors and fed from a sinusoidal PWM-GTR inverter. The whole system is combined from two subsystems, both 8031 single-chip microprocessors. The communication between them is coordinated by the full-duplex serial port within the chip in an ask-and-answer communication manner. The adopted error-correcting means has improved the operational reliability of the system. Experimental results on a 3 kW induction motor are given.<>
{"title":"Multiprocessor control for a AC motor slip-frequency vector control system","authors":"Xu Yinguan, Cui Gejin","doi":"10.1109/IAS.1990.152257","DOIUrl":"https://doi.org/10.1109/IAS.1990.152257","url":null,"abstract":"A vector control system for a slip-frequency controlled induction motor is introduced. The system has a simple structure, fair performance, and convenient operation. It is realized by two single-chip microprocessors and fed from a sinusoidal PWM-GTR inverter. The whole system is combined from two subsystems, both 8031 single-chip microprocessors. The communication between them is coordinated by the full-duplex serial port within the chip in an ask-and-answer communication manner. The adopted error-correcting means has improved the operational reliability of the system. Experimental results on a 3 kW induction motor are given.<<ETX>>","PeriodicalId":185839,"journal":{"name":"Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124105914","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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