Pub Date : 1999-07-27DOI: 10.1109/PEDS.1999.794627
Guoguang Zhang
Our purpose is to develop systematic analysis and design methods for a two-inertia system. A conventional PI speed control system with a torsional load is redesigned, and the damping characteristic of the system is derived and analyzed. It is shown that the dynamic characteristic of the system strongly depends on the inertia ratio of load to motor. Three kinds of typical pole assignments with identical radius/damping coefficient/real-part are applied and compared, and the merits of each pole assignment design are concluded. Furthermore, for small inertia ratio, we show how to improve the damping by a derivative feedback of motor speed.
{"title":"Speed control of two-inertia system by PI/PID control","authors":"Guoguang Zhang","doi":"10.1109/PEDS.1999.794627","DOIUrl":"https://doi.org/10.1109/PEDS.1999.794627","url":null,"abstract":"Our purpose is to develop systematic analysis and design methods for a two-inertia system. A conventional PI speed control system with a torsional load is redesigned, and the damping characteristic of the system is derived and analyzed. It is shown that the dynamic characteristic of the system strongly depends on the inertia ratio of load to motor. Three kinds of typical pole assignments with identical radius/damping coefficient/real-part are applied and compared, and the merits of each pole assignment design are concluded. Furthermore, for small inertia ratio, we show how to improve the damping by a derivative feedback of motor speed.","PeriodicalId":254764,"journal":{"name":"Proceedings of the IEEE 1999 International Conference on Power Electronics and Drive Systems. PEDS'99 (Cat. No.99TH8475)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122777703","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 : 1999-07-27DOI: 10.1109/PEDS.1999.794577
M. Tsai, T. Cheng, C. Tsai
This paper presents a feasible method for AC power source burn-in test. The proposed architecture consists of two power stages, the AC/DC converter and the DC/AC inverter, where the former imitates the load characteristic and the latter sends back the recycling energy to the utility. Both two stages are regulated by conventional pulse width modulation (PWM) and operated in current-mode control. It consumes a less amount of energy than conventional method and provides extra flexibility for the test load. In addition, it can also correct the utility current which is rich in high harmonic distortion. To implement the proposed idea, a simple control strategy and system design are presented in this paper. Case study for AC motor driver is demonstrated by means of prototype experiment to prove its performance and effectiveness.
{"title":"High-efficiency energy recycling system for AC power source burn-in test","authors":"M. Tsai, T. Cheng, C. Tsai","doi":"10.1109/PEDS.1999.794577","DOIUrl":"https://doi.org/10.1109/PEDS.1999.794577","url":null,"abstract":"This paper presents a feasible method for AC power source burn-in test. The proposed architecture consists of two power stages, the AC/DC converter and the DC/AC inverter, where the former imitates the load characteristic and the latter sends back the recycling energy to the utility. Both two stages are regulated by conventional pulse width modulation (PWM) and operated in current-mode control. It consumes a less amount of energy than conventional method and provides extra flexibility for the test load. In addition, it can also correct the utility current which is rich in high harmonic distortion. To implement the proposed idea, a simple control strategy and system design are presented in this paper. Case study for AC motor driver is demonstrated by means of prototype experiment to prove its performance and effectiveness.","PeriodicalId":254764,"journal":{"name":"Proceedings of the IEEE 1999 International Conference on Power Electronics and Drive Systems. PEDS'99 (Cat. No.99TH8475)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115141702","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 : 1999-07-27DOI: 10.1109/PEDS.1999.792817
N. Yamamura, M. Ishida, T. Hori
The authors propose an inexpensive wind power generating system in this paper. Existing wind power generating systems are mostly of large capacity (over 100 kW) and high-priced (about 1000 USS/kW). Because of the erratic changes of wind power and of smoothing peak power, an AC/DC converter-fed battery system is recommended. Thus, one requires the exact rotating speed of generators (especially in the case of synchronous generators) to use AC/DC converters with high quality. These factors are increasing the cost of such systems. The authors adopt a compact permanent magnet type synchronous generator, which doesn't need exciting current, and a step-up/down buck-boost chopper to wind power generating system of a few kW output without position or speed sensor. In addition, they employ an inexpensive rectifier circuit using a diode bridge instead of an AC/DC power converter with PWM method. Using these methods, they achieve a simple and inexpensive wind power generating system.
{"title":"A simple wind power generating system with permanent magnet type synchronous generator","authors":"N. Yamamura, M. Ishida, T. Hori","doi":"10.1109/PEDS.1999.792817","DOIUrl":"https://doi.org/10.1109/PEDS.1999.792817","url":null,"abstract":"The authors propose an inexpensive wind power generating system in this paper. Existing wind power generating systems are mostly of large capacity (over 100 kW) and high-priced (about 1000 USS/kW). Because of the erratic changes of wind power and of smoothing peak power, an AC/DC converter-fed battery system is recommended. Thus, one requires the exact rotating speed of generators (especially in the case of synchronous generators) to use AC/DC converters with high quality. These factors are increasing the cost of such systems. The authors adopt a compact permanent magnet type synchronous generator, which doesn't need exciting current, and a step-up/down buck-boost chopper to wind power generating system of a few kW output without position or speed sensor. In addition, they employ an inexpensive rectifier circuit using a diode bridge instead of an AC/DC power converter with PWM method. Using these methods, they achieve a simple and inexpensive wind power generating system.","PeriodicalId":254764,"journal":{"name":"Proceedings of the IEEE 1999 International Conference on Power Electronics and Drive Systems. PEDS'99 (Cat. No.99TH8475)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131831962","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 : 1999-07-27DOI: 10.1109/PEDS.1999.792822
K. Satoh, M. Yamamoto, K. Morishita, Y. Yamaguchi, H. Iwamoto
GCT (gate commutated turn-off thyristor) is a new high power device with snubberless turn-off operation which was developed in the mid-1990s, and is growing up to be the main device instead of GTO (gate turn-off thyristor) for high power application. For PWM current source inverters used in AC drive, symmetrical GCT with reverse blocking characteristics are expected. However, the symmetrical structure generally gives smaller turn-off capability compared with asymmetrical GCT, which has already been developed. This paper presents new GCT technologies, characteristics of 6 kV/4 kA symmetrical GCT and comparison of loss between current source inverter and voltage source inverter by using GCT.
{"title":"High power symmetrical GCT for current source inverter","authors":"K. Satoh, M. Yamamoto, K. Morishita, Y. Yamaguchi, H. Iwamoto","doi":"10.1109/PEDS.1999.792822","DOIUrl":"https://doi.org/10.1109/PEDS.1999.792822","url":null,"abstract":"GCT (gate commutated turn-off thyristor) is a new high power device with snubberless turn-off operation which was developed in the mid-1990s, and is growing up to be the main device instead of GTO (gate turn-off thyristor) for high power application. For PWM current source inverters used in AC drive, symmetrical GCT with reverse blocking characteristics are expected. However, the symmetrical structure generally gives smaller turn-off capability compared with asymmetrical GCT, which has already been developed. This paper presents new GCT technologies, characteristics of 6 kV/4 kA symmetrical GCT and comparison of loss between current source inverter and voltage source inverter by using GCT.","PeriodicalId":254764,"journal":{"name":"Proceedings of the IEEE 1999 International Conference on Power Electronics and Drive Systems. PEDS'99 (Cat. No.99TH8475)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124301885","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 : 1999-07-27DOI: 10.1109/PEDS.1999.794528
D. Sutanto
Summary form only as given. The emergency of new breeds of power electronics and improved battery technology has created renewed interests in battery energy storage system (BESS). BESS is a modern cost-effective solution that can help both electric utilities and industrial and commercial businesses to meet the growing need of controlling peak energy usage, power quality and environmental problems. BESS provide electric utilities with alternatives to conventional storage technologies, such as pumped hydro. As a generation resource, a BESS can store off-peak energy and provide power when it is needed. As a distribution resource, a BESS can defer or possibly eliminate the need for new transmission or distribution lines, resulting in cost savings and greater asset utilisation. The incorporation of battery storage with renewable energy generators will provide greater grid stability and reliability, thus allowing increased use of these resources. In industrial and commercial applications, BESS is a controllable demand-side management option that can provide industrial manufacturing companies and commercial customers improved power quality, uninterruptible power, and energy management capability. This capability provides for power demand reduction and peak-saving by storing lower cost energy at night and using it during peak hours of the day when energy costs typically are much higher, while simultaneously protecting most economically critical and sensitive of customer loads by providing uninterruptible power supply and active harmonic filtering. This paper describes the current state-of-the-art BESS, including a brief description of the most recently commissioned 20 MW BESS in Puerto Rico. The paper also discusses the future potential of battery energy systems utilising electrical vehicle batteries, and research work at the Hong Kong Polytechnic University in developing advanced energy storage systems.
{"title":"Power management solutions for energy management, power quality and environment using battery energy storage systems","authors":"D. Sutanto","doi":"10.1109/PEDS.1999.794528","DOIUrl":"https://doi.org/10.1109/PEDS.1999.794528","url":null,"abstract":"Summary form only as given. The emergency of new breeds of power electronics and improved battery technology has created renewed interests in battery energy storage system (BESS). BESS is a modern cost-effective solution that can help both electric utilities and industrial and commercial businesses to meet the growing need of controlling peak energy usage, power quality and environmental problems. BESS provide electric utilities with alternatives to conventional storage technologies, such as pumped hydro. As a generation resource, a BESS can store off-peak energy and provide power when it is needed. As a distribution resource, a BESS can defer or possibly eliminate the need for new transmission or distribution lines, resulting in cost savings and greater asset utilisation. The incorporation of battery storage with renewable energy generators will provide greater grid stability and reliability, thus allowing increased use of these resources. In industrial and commercial applications, BESS is a controllable demand-side management option that can provide industrial manufacturing companies and commercial customers improved power quality, uninterruptible power, and energy management capability. This capability provides for power demand reduction and peak-saving by storing lower cost energy at night and using it during peak hours of the day when energy costs typically are much higher, while simultaneously protecting most economically critical and sensitive of customer loads by providing uninterruptible power supply and active harmonic filtering. This paper describes the current state-of-the-art BESS, including a brief description of the most recently commissioned 20 MW BESS in Puerto Rico. The paper also discusses the future potential of battery energy systems utilising electrical vehicle batteries, and research work at the Hong Kong Polytechnic University in developing advanced energy storage systems.","PeriodicalId":254764,"journal":{"name":"Proceedings of the IEEE 1999 International Conference on Power Electronics and Drive Systems. PEDS'99 (Cat. No.99TH8475)","volume":"346 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124272470","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 : 1999-07-27DOI: 10.1109/PEDS.1999.794560
F. Flinders, J. Zhang, W. Oghanna
The paper presents an experimental investigation on excessive brush and commutator wear in DC traction machines. An advanced computer measurement system is employed for data acquisition so that all measured data are recorded continuously in revenue raising services. The measured parameters include the mechanical vibration of the motor and its carbon brushes, a video camera image of sparking at the brush-commutator interface, transient currents of armature winding and carbon brushes. The paper reveals the relationship between harmonic currents and mechanical vibrations in DC traction motors. It concludes that the mechanical resonance of a motor at a certain locomotive speed is a major cause for the excessive brush and commutator wear.
{"title":"Investigation on excessive commutator and brush wears in DC traction machines","authors":"F. Flinders, J. Zhang, W. Oghanna","doi":"10.1109/PEDS.1999.794560","DOIUrl":"https://doi.org/10.1109/PEDS.1999.794560","url":null,"abstract":"The paper presents an experimental investigation on excessive brush and commutator wear in DC traction machines. An advanced computer measurement system is employed for data acquisition so that all measured data are recorded continuously in revenue raising services. The measured parameters include the mechanical vibration of the motor and its carbon brushes, a video camera image of sparking at the brush-commutator interface, transient currents of armature winding and carbon brushes. The paper reveals the relationship between harmonic currents and mechanical vibrations in DC traction motors. It concludes that the mechanical resonance of a motor at a certain locomotive speed is a major cause for the excessive brush and commutator wear.","PeriodicalId":254764,"journal":{"name":"Proceedings of the IEEE 1999 International Conference on Power Electronics and Drive Systems. PEDS'99 (Cat. No.99TH8475)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131978756","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 : 1999-07-27DOI: 10.1109/PEDS.1999.794536
F.F. Perez-Guerrero, K. Venkatesan, Ray, Richard L. Patterson
Low-temperature operation of a closed loop three level buck DC-to-DC power converter with charge pump controller has been experimentally investigated. The power converter system has been designed and built with standard commercially available components. Performance characteristics such as efficiency and regulation are studied for different temperatures from 25/spl deg/C down to -184/spl deg/C. CMOSICs, MOSFET switches and ultrafast diodes prove to be suited to operate in a wide temperature range. The performance of the output filter inductor and capacitor does not change significantly at 77/spl deg/K compared to room temperature.
{"title":"Low temperature performance of a closed loop three level buck converter","authors":"F.F. Perez-Guerrero, K. Venkatesan, Ray, Richard L. Patterson","doi":"10.1109/PEDS.1999.794536","DOIUrl":"https://doi.org/10.1109/PEDS.1999.794536","url":null,"abstract":"Low-temperature operation of a closed loop three level buck DC-to-DC power converter with charge pump controller has been experimentally investigated. The power converter system has been designed and built with standard commercially available components. Performance characteristics such as efficiency and regulation are studied for different temperatures from 25/spl deg/C down to -184/spl deg/C. CMOSICs, MOSFET switches and ultrafast diodes prove to be suited to operate in a wide temperature range. The performance of the output filter inductor and capacitor does not change significantly at 77/spl deg/K compared to room temperature.","PeriodicalId":254764,"journal":{"name":"Proceedings of the IEEE 1999 International Conference on Power Electronics and Drive Systems. PEDS'99 (Cat. No.99TH8475)","volume":"21 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132496715","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 : 1999-07-27DOI: 10.1109/PEDS.1999.794549
H. Tan, S. Ho
The torque output in a permanent magnet brushless DC motor (BLDCM) is usually controlled by regulating the motor phase currents. In this paper, three kinds of PWM strategies together with some critical review on traditional current measurements in a BLDCM drive system are discussed. A novel method for assessing the PWM information and measuring the motor phase currents by a DC link current sensor is also proposed. The attractive feature of this method is the simplicity with the current sample processing because there is no need to incorporate the conduction information of the power switches or diodes. Only the single sided PWM or the double sided complementary PWM is needed with the proposed technique.
{"title":"A novel single current sensor technique suitable for BLDCM drives","authors":"H. Tan, S. Ho","doi":"10.1109/PEDS.1999.794549","DOIUrl":"https://doi.org/10.1109/PEDS.1999.794549","url":null,"abstract":"The torque output in a permanent magnet brushless DC motor (BLDCM) is usually controlled by regulating the motor phase currents. In this paper, three kinds of PWM strategies together with some critical review on traditional current measurements in a BLDCM drive system are discussed. A novel method for assessing the PWM information and measuring the motor phase currents by a DC link current sensor is also proposed. The attractive feature of this method is the simplicity with the current sample processing because there is no need to incorporate the conduction information of the power switches or diodes. Only the single sided PWM or the double sided complementary PWM is needed with the proposed technique.","PeriodicalId":254764,"journal":{"name":"Proceedings of the IEEE 1999 International Conference on Power Electronics and Drive Systems. PEDS'99 (Cat. No.99TH8475)","volume":"430 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133852000","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 : 1999-07-27DOI: 10.1109/PEDS.1999.794582
Jianxin Tang
This paper addresses real-time control of DC motors using the MATLAB interfaced low cost TMS320C31 digital signal processing starter kit (DSK). A controller is designed using MATLAB functions to generate a set of coefficients associated with a desired controller's characteristics and included in a generic controller program transparent to the user. While the time response is plotted on the PC monitor screen using MATLAB, the controller is implemented on the DSK in real time to achieve the desired control functions. Test results on a motor speed control system show that actual output speeds agree with theoretical calculations.
{"title":"Real-time DC motor control using the MATLAB interfaced TMS320C31 digital signal processing starter kit (DSK)","authors":"Jianxin Tang","doi":"10.1109/PEDS.1999.794582","DOIUrl":"https://doi.org/10.1109/PEDS.1999.794582","url":null,"abstract":"This paper addresses real-time control of DC motors using the MATLAB interfaced low cost TMS320C31 digital signal processing starter kit (DSK). A controller is designed using MATLAB functions to generate a set of coefficients associated with a desired controller's characteristics and included in a generic controller program transparent to the user. While the time response is plotted on the PC monitor screen using MATLAB, the controller is implemented on the DSK in real time to achieve the desired control functions. Test results on a motor speed control system show that actual output speeds agree with theoretical calculations.","PeriodicalId":254764,"journal":{"name":"Proceedings of the IEEE 1999 International Conference on Power Electronics and Drive Systems. PEDS'99 (Cat. No.99TH8475)","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117195509","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 : 1999-07-27DOI: 10.1109/PEDS.1999.792760
E. Dede, J. Jordán, V. Esteve, J. Espí, S. Casan
Series and parallel resonant inverters are the common structures in high power industrial generators for induction heating applications. In practical working conditions, short-circuit of the heating coil is very common, normally producing overvoltages that can damage the power transistors of the inverter if no special precautions are taken. The aim of the paper is to show the mechanism of how overvoltages are generated under short-circuit conditions of the heating coil for series and parallel inverters.
{"title":"Series and parallel resonant inverters for induction heating under short-circuit conditions considering parasitic components","authors":"E. Dede, J. Jordán, V. Esteve, J. Espí, S. Casan","doi":"10.1109/PEDS.1999.792760","DOIUrl":"https://doi.org/10.1109/PEDS.1999.792760","url":null,"abstract":"Series and parallel resonant inverters are the common structures in high power industrial generators for induction heating applications. In practical working conditions, short-circuit of the heating coil is very common, normally producing overvoltages that can damage the power transistors of the inverter if no special precautions are taken. The aim of the paper is to show the mechanism of how overvoltages are generated under short-circuit conditions of the heating coil for series and parallel inverters.","PeriodicalId":254764,"journal":{"name":"Proceedings of the IEEE 1999 International Conference on Power Electronics and Drive Systems. PEDS'99 (Cat. No.99TH8475)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117341528","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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