Pub Date : 1999-07-27DOI: 10.1109/PEDS.1999.794592
P. Chhawchbaria, S. Tsui, D. Cheng
Random selection of PCB layout and placement of the surge protection devices in the protection circuitry results in a large overshoot with oscillatory response. The clamped output voltage level includes the overshoot due to distant placement of the suppressor devices and EMI filter capacitors. This degrades the performance of transient voltage surge suppression systems. The three fold decrease in track width deteriorates the performance substantially. An experimental study with supporting formulae is reported. Effects of different PCB layouts and placement of varistors driven with a 1.2/50 /spl mu/s combination wave is reported. The effect on the performance due to location of the EMI filter capacitors and varistors on the PCB track is discussed along with the results. The resulting waveforms are reported to depict the effect and results are discussed with conclusions.
{"title":"Effects of the PCB layout on the surge suppression in power convertors with coordinated surge suppressor devices","authors":"P. Chhawchbaria, S. Tsui, D. Cheng","doi":"10.1109/PEDS.1999.794592","DOIUrl":"https://doi.org/10.1109/PEDS.1999.794592","url":null,"abstract":"Random selection of PCB layout and placement of the surge protection devices in the protection circuitry results in a large overshoot with oscillatory response. The clamped output voltage level includes the overshoot due to distant placement of the suppressor devices and EMI filter capacitors. This degrades the performance of transient voltage surge suppression systems. The three fold decrease in track width deteriorates the performance substantially. An experimental study with supporting formulae is reported. Effects of different PCB layouts and placement of varistors driven with a 1.2/50 /spl mu/s combination wave is reported. The effect on the performance due to location of the EMI filter capacitors and varistors on the PCB track is discussed along with the results. The resulting waveforms are reported to depict the effect and results are discussed with conclusions.","PeriodicalId":254764,"journal":{"name":"Proceedings of the IEEE 1999 International Conference on Power Electronics and Drive Systems. PEDS'99 (Cat. No.99TH8475)","volume":"8 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":"131566551","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.1999.794606
Hae-Ryong Choi, H. Mok, G. Choe, Chung-Yun Won, Kyu Sik Kim
An inverter arc welding machine applying a DCM boost converter is presented in this paper. First, the basic operation and principle is reviewed. Controller design is intended to force voltage ripple to minimize, and dynamic response to enhance. A feedforward scheme for an inverter arc welding machine is developed, and that is verified by simulation and experiment. The improved power factor characteristics of inverter arc welding machine known as low power factor system with nonlinear property, are shown and evaluated compared to the conventional scheme.
{"title":"Enhanced characteristics of DCM boost converter for inverter arc welding system","authors":"Hae-Ryong Choi, H. Mok, G. Choe, Chung-Yun Won, Kyu Sik Kim","doi":"10.1109/PEDS.1999.794606","DOIUrl":"https://doi.org/10.1109/PEDS.1999.794606","url":null,"abstract":"An inverter arc welding machine applying a DCM boost converter is presented in this paper. First, the basic operation and principle is reviewed. Controller design is intended to force voltage ripple to minimize, and dynamic response to enhance. A feedforward scheme for an inverter arc welding machine is developed, and that is verified by simulation and experiment. The improved power factor characteristics of inverter arc welding machine known as low power factor system with nonlinear property, are shown and evaluated compared to the conventional scheme.","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":"130862565","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.1999.792833
Yaow-Ming Chen, Yuan-Ming Cheng
The proposed analog-based modified PWM control scheme for the DC-AC inverter can eliminate the low order harmonic components caused by the nonconstant DC voltage source. A simple high power factor full-bridge rectifier with the valley-fill filter is selected to realize the nonconstant DC voltage source. Operation modes of the valley fill filter are included in the paper. The performance of the proposed modified PWM control scheme is verified by computer simulation and experimental results.
{"title":"Modified PWM control for the DC-AC inverter with a non-constant voltage source","authors":"Yaow-Ming Chen, Yuan-Ming Cheng","doi":"10.1109/PEDS.1999.792833","DOIUrl":"https://doi.org/10.1109/PEDS.1999.792833","url":null,"abstract":"The proposed analog-based modified PWM control scheme for the DC-AC inverter can eliminate the low order harmonic components caused by the nonconstant DC voltage source. A simple high power factor full-bridge rectifier with the valley-fill filter is selected to realize the nonconstant DC voltage source. Operation modes of the valley fill filter are included in the paper. The performance of the proposed modified PWM control scheme is verified by computer simulation and experimental results.","PeriodicalId":254764,"journal":{"name":"Proceedings of the IEEE 1999 International Conference on Power Electronics and Drive Systems. PEDS'99 (Cat. No.99TH8475)","volume":"5 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":"132048134","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.1999.794529
D. Cheng, W. K. Mo, Y. Lee
This paper summaries the geometrical effects on the winding loss performance of a low profile inductor with spiral coil. Relevant winding loss equations are derived and applied to an optimization algorithm that searches for the design that minimizes the total winding loss at a given core height and footprint area. It has been found that the curves of winding loss versus winding arrangement with different core height show a minimum loss at a critical winding arrangement and core height. Below or above these critical factors, the loss increases drastically. Finally, a new concept of critical frequency is developed to simplify the analysis of AC winding loss of spiral coil.
{"title":"Winding geometrical effects on the high frequency loss of low profile inductor design","authors":"D. Cheng, W. K. Mo, Y. Lee","doi":"10.1109/PEDS.1999.794529","DOIUrl":"https://doi.org/10.1109/PEDS.1999.794529","url":null,"abstract":"This paper summaries the geometrical effects on the winding loss performance of a low profile inductor with spiral coil. Relevant winding loss equations are derived and applied to an optimization algorithm that searches for the design that minimizes the total winding loss at a given core height and footprint area. It has been found that the curves of winding loss versus winding arrangement with different core height show a minimum loss at a critical winding arrangement and core height. Below or above these critical factors, the loss increases drastically. Finally, a new concept of critical frequency is developed to simplify the analysis of AC winding loss of spiral coil.","PeriodicalId":254764,"journal":{"name":"Proceedings of the IEEE 1999 International Conference on Power Electronics and Drive Systems. PEDS'99 (Cat. No.99TH8475)","volume":"192 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133911914","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.1999.794611
Y. Feng, Y. Konishi, M. Nakaoka
A novel deadbeat control of a three-phase current-fed PFC power converter with an optimum PWM pattern is presented to improve its dynamic state performance. In order to improve the utility-side current THD characteristics of this converter, the feasible optimum PWM pattern under conditions of lower switching frequency for large capacity applications is introduced. By using a moving-average that provides a digital filter function for measured variables, the ripple component of carrier frequency can be removed. This deadbeat control scheme with proposed optimum PWM for current-fed three-phase PWM converter could be successfully applied to improve the transient response of utility-power source line current. It is proven from a simulation point of view that sinewave line current shaping can be achieved for a three-phase current source converter operating under unity power factor and proposed control system provides a fast transient response.
{"title":"Deadbeat control scheme for three phase current-fed PFC converter with an optimum PWM strategy","authors":"Y. Feng, Y. Konishi, M. Nakaoka","doi":"10.1109/PEDS.1999.794611","DOIUrl":"https://doi.org/10.1109/PEDS.1999.794611","url":null,"abstract":"A novel deadbeat control of a three-phase current-fed PFC power converter with an optimum PWM pattern is presented to improve its dynamic state performance. In order to improve the utility-side current THD characteristics of this converter, the feasible optimum PWM pattern under conditions of lower switching frequency for large capacity applications is introduced. By using a moving-average that provides a digital filter function for measured variables, the ripple component of carrier frequency can be removed. This deadbeat control scheme with proposed optimum PWM for current-fed three-phase PWM converter could be successfully applied to improve the transient response of utility-power source line current. It is proven from a simulation point of view that sinewave line current shaping can be achieved for a three-phase current source converter operating under unity power factor and proposed control system provides a fast transient response.","PeriodicalId":254764,"journal":{"name":"Proceedings of the IEEE 1999 International Conference on Power Electronics and Drive Systems. PEDS'99 (Cat. No.99TH8475)","volume":"22 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":"115676197","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.1999.794587
A. Kaddouri, B. Khodabakhchian, L. Dessaint, R. Champagne, L. Snider
This paper introduces two powerful and user-friendly simulation tools for the analysis of power systems, power electronics and drive systems. The first tool consists in the Power System Blockset (an offline simulation tool) and the second one is the fully digital real-time simulator Hypersim. Their performances are demonstrated by an application example based on an induction machine AC drive.
本文介绍了两个功能强大且用户友好的仿真工具，用于电力系统、电力电子和驱动系统的分析。第一个工具包括Power System Blockset(离线仿真工具)，第二个工具是全数字实时模拟器Hypersim。最后以感应电机交流传动为例，对其性能进行了验证。
{"title":"A new generation of simulation tools for electric drives and power electronics","authors":"A. Kaddouri, B. Khodabakhchian, L. Dessaint, R. Champagne, L. Snider","doi":"10.1109/PEDS.1999.794587","DOIUrl":"https://doi.org/10.1109/PEDS.1999.794587","url":null,"abstract":"This paper introduces two powerful and user-friendly simulation tools for the analysis of power systems, power electronics and drive systems. The first tool consists in the Power System Blockset (an offline simulation tool) and the second one is the fully digital real-time simulator Hypersim. Their performances are demonstrated by an application example based on an induction machine AC drive.","PeriodicalId":254764,"journal":{"name":"Proceedings of the IEEE 1999 International Conference on Power Electronics and Drive Systems. PEDS'99 (Cat. No.99TH8475)","volume":"58 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":"116136300","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.1999.794609
M.L. Zhang, B. Wu, Y. Xiao, F. Dewinter, R. Sotudeh
A novel rectifier topology for high power (0.5 to 10 MVA) current source based AC motor drives is proposed. This rectifier is composed of a multi-winding transformer, a multilevel diode rectifier and a multi-level buck converter. The rectifier produces near unity input power factor and sinusoidal input current under any operating conditions. In addition, the proposed rectifier has a few other features such as reliable operation and high voltage operation capability. This paper addresses a number of system design considerations such as switching pattern, input power quality and the effects of discrepancies of transformer leakage inductances on the system performance. Experimental results on a 5 kVA/208 V four-level prototype are also included.
{"title":"A multi-level buck converter based rectifier with sinusoidal inputs and unity power factor for medium voltage (4160-7200 V) applications","authors":"M.L. Zhang, B. Wu, Y. Xiao, F. Dewinter, R. Sotudeh","doi":"10.1109/PEDS.1999.794609","DOIUrl":"https://doi.org/10.1109/PEDS.1999.794609","url":null,"abstract":"A novel rectifier topology for high power (0.5 to 10 MVA) current source based AC motor drives is proposed. This rectifier is composed of a multi-winding transformer, a multilevel diode rectifier and a multi-level buck converter. The rectifier produces near unity input power factor and sinusoidal input current under any operating conditions. In addition, the proposed rectifier has a few other features such as reliable operation and high voltage operation capability. This paper addresses a number of system design considerations such as switching pattern, input power quality and the effects of discrepancies of transformer leakage inductances on the system performance. Experimental results on a 5 kVA/208 V four-level prototype are also included.","PeriodicalId":254764,"journal":{"name":"Proceedings of the IEEE 1999 International Conference on Power Electronics and Drive Systems. PEDS'99 (Cat. No.99TH8475)","volume":"67 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":"116008847","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.1999.792810
P. Boyagoda, M. Nakaoka
A novel neural network (NN) based trajectory tracking controller for a servo system that also incorporates a knowledge-based control scheme is proposed in this paper. A decentralized control scheme, which neither requires a priori knowledge of the plant nor learning of the system dynamics, is introduced to deactivate the coupled dynamics associated with certain systems like robotic manipulators. The NN is employed to classify the system input-output measurements into several patterns depending on the displacement and velocity deviations from the respective desired trajectories. A proportional plus derivative gain control action is determined from a look-up table corresponding to the classification from the NN. Furthermore, an integrator is applied to enhance system performance. Several PD gains are introduced in a staggered format relative to the magnitudes of the displacement and velocity tracking errors, resulting in a controller that is robust to both structured and unstructured uncertainties.
{"title":"A servo system tracking controller based on neural networks","authors":"P. Boyagoda, M. Nakaoka","doi":"10.1109/PEDS.1999.792810","DOIUrl":"https://doi.org/10.1109/PEDS.1999.792810","url":null,"abstract":"A novel neural network (NN) based trajectory tracking controller for a servo system that also incorporates a knowledge-based control scheme is proposed in this paper. A decentralized control scheme, which neither requires a priori knowledge of the plant nor learning of the system dynamics, is introduced to deactivate the coupled dynamics associated with certain systems like robotic manipulators. The NN is employed to classify the system input-output measurements into several patterns depending on the displacement and velocity deviations from the respective desired trajectories. A proportional plus derivative gain control action is determined from a look-up table corresponding to the classification from the NN. Furthermore, an integrator is applied to enhance system performance. Several PD gains are introduced in a staggered format relative to the magnitudes of the displacement and velocity tracking errors, resulting in a controller that is robust to both structured and unstructured uncertainties.","PeriodicalId":254764,"journal":{"name":"Proceedings of the IEEE 1999 International Conference on Power Electronics and Drive Systems. PEDS'99 (Cat. No.99TH8475)","volume":"2 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":"130851559","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.1999.794596
P. Mukherjee, B. Majumdar, F. A. Talukdar, A. Ganguly, S. K. Biswas
In an UPS, the battery acts as a reservoir of energy. However the available energy is dependent upon several parameters like the charging time, charging rate, self discharge, aging of the cells and the permitted voltage up to which discharge is to be allowed. Thus the stored energy content must be known accurately to predict the backup operation time left in the event of abnormal mains supply, after which the UPS has to be shut down. This paper presents a method of online calculation of the battery backup time depending on the actual rate of discharge and its terminal voltage. This technique takes into account the charge condition of the battery, the self-discharge aging and change in load current to give a true estimate of backup time. This information is sent to the computer via a serial port and is displayed at one corner of the user monitor screen. Such a facility helps the user to save and close all the running programs before the shut down of the UPS.
{"title":"Accurate prediction of backup time in an UPS and its display on user computer monitor screen","authors":"P. Mukherjee, B. Majumdar, F. A. Talukdar, A. Ganguly, S. K. Biswas","doi":"10.1109/PEDS.1999.794596","DOIUrl":"https://doi.org/10.1109/PEDS.1999.794596","url":null,"abstract":"In an UPS, the battery acts as a reservoir of energy. However the available energy is dependent upon several parameters like the charging time, charging rate, self discharge, aging of the cells and the permitted voltage up to which discharge is to be allowed. Thus the stored energy content must be known accurately to predict the backup operation time left in the event of abnormal mains supply, after which the UPS has to be shut down. This paper presents a method of online calculation of the battery backup time depending on the actual rate of discharge and its terminal voltage. This technique takes into account the charge condition of the battery, the self-discharge aging and change in load current to give a true estimate of backup time. This information is sent to the computer via a serial port and is displayed at one corner of the user monitor screen. Such a facility helps the user to save and close all the running programs before the shut down of the UPS.","PeriodicalId":254764,"journal":{"name":"Proceedings of the IEEE 1999 International Conference on Power Electronics and Drive Systems. PEDS'99 (Cat. No.99TH8475)","volume":"17 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":"126472832","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.1999.792737
Zheng Lijun, Ren Tian-liang
A topology of a multiple flyback DC-DC power converter is proposed in this paper. Because of the use of this topology, the problem of designing a switched mode power converter for a high input-bus voltage has been solved successfully. The advantages of this topology are discussed and some useful circuits are also given.
{"title":"The topology design of the multiple flyback DC-DC converter","authors":"Zheng Lijun, Ren Tian-liang","doi":"10.1109/PEDS.1999.792737","DOIUrl":"https://doi.org/10.1109/PEDS.1999.792737","url":null,"abstract":"A topology of a multiple flyback DC-DC power converter is proposed in this paper. Because of the use of this topology, the problem of designing a switched mode power converter for a high input-bus voltage has been solved successfully. The advantages of this topology are discussed and some useful circuits are also given.","PeriodicalId":254764,"journal":{"name":"Proceedings of the IEEE 1999 International Conference on Power Electronics and Drive Systems. PEDS'99 (Cat. No.99TH8475)","volume":"5 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":"127750398","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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