Pub Date : 2003-11-17DOI: 10.1109/PEDS.2003.1283212
H. To, M.F. Rahman, C. Grantham, B. Karawayil
This paper proposes a controller implemented in a current-source active power filter (CS-APF) which can adjust adaptively the reactive power generated by the APF. With this controller, the line current distortion level can be kept within a certain limit whilst the system power factor can be maintained at a highest available level. In an APF with DSP-based controller, the proposed algorithm can be implemented with some modification in the controller software only. Performance of a CS-APF with and without this adaptive controller are simulated and compared to show the validity of the proposed approach.
{"title":"Adaptive controller for reactive power compensation in a current-source active power filter","authors":"H. To, M.F. Rahman, C. Grantham, B. Karawayil","doi":"10.1109/PEDS.2003.1283212","DOIUrl":"https://doi.org/10.1109/PEDS.2003.1283212","url":null,"abstract":"This paper proposes a controller implemented in a current-source active power filter (CS-APF) which can adjust adaptively the reactive power generated by the APF. With this controller, the line current distortion level can be kept within a certain limit whilst the system power factor can be maintained at a highest available level. In an APF with DSP-based controller, the proposed algorithm can be implemented with some modification in the controller software only. Performance of a CS-APF with and without this adaptive controller are simulated and compared to show the validity of the proposed approach.","PeriodicalId":106054,"journal":{"name":"The Fifth International Conference on Power Electronics and Drive Systems, 2003. PEDS 2003.","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128831986","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 : 2003-11-17DOI: 10.1109/PEDS.2003.1283134
Xinke Wu, J.M. Zhang, X.G. Xie, Z. Qian
This paper proposes a novel single-stage PFC converter with soft switching, which operates with lower voltage stress, ZVS and ZCS can be achieved for devices at secondary and primary of the transformer respectively. Simulation and experimental results verify the theoretical analysis.
{"title":"A novel single-stage ZVSZCS PFC half-bridge AC-DC converter with reduced voltage stress","authors":"Xinke Wu, J.M. Zhang, X.G. Xie, Z. Qian","doi":"10.1109/PEDS.2003.1283134","DOIUrl":"https://doi.org/10.1109/PEDS.2003.1283134","url":null,"abstract":"This paper proposes a novel single-stage PFC converter with soft switching, which operates with lower voltage stress, ZVS and ZCS can be achieved for devices at secondary and primary of the transformer respectively. Simulation and experimental results verify the theoretical analysis.","PeriodicalId":106054,"journal":{"name":"The Fifth International Conference on Power Electronics and Drive Systems, 2003. PEDS 2003.","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126625983","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 : 2003-11-17DOI: 10.1109/PEDS.2003.1283124
F. Liu, A. I. Maswood
In this paper, a new method of improving the input current total harmonic distortion (THD) as well as power factor of a three-phase suppressed-link rectifier-inverter is presented. This proposed method makes use of a novel controlled diode rectifier. This paper illustrates how the proposed new method can enable a rectifier-inverter AC motor drive working in a wide power range with near unity power factor and low harmonics. The analysis of the circuit with new control method is described. The main features of the topology are low cost, small size, high efficiency and simplicity.
{"title":"A novel near-unity power factor AC drive","authors":"F. Liu, A. I. Maswood","doi":"10.1109/PEDS.2003.1283124","DOIUrl":"https://doi.org/10.1109/PEDS.2003.1283124","url":null,"abstract":"In this paper, a new method of improving the input current total harmonic distortion (THD) as well as power factor of a three-phase suppressed-link rectifier-inverter is presented. This proposed method makes use of a novel controlled diode rectifier. This paper illustrates how the proposed new method can enable a rectifier-inverter AC motor drive working in a wide power range with near unity power factor and low harmonics. The analysis of the circuit with new control method is described. The main features of the topology are low cost, small size, high efficiency and simplicity.","PeriodicalId":106054,"journal":{"name":"The Fifth International Conference on Power Electronics and Drive Systems, 2003. PEDS 2003.","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123379978","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 : 2003-11-17DOI: 10.1109/PEDS.2003.1283193
K. Kittipeerachon, C. Bunlaksananusorn
This paper presents practical switched mode power supplies (SMPS) compensation circuit design based on the frequency response method. The design is aided by matlab, which facilitates the formulation of transfer functions, construction of Bode plots, and calculation of compensation circuit component values. Design examples are given for a buck and a boost converters. Experimental results obtained from the prototype converters show good output voltage regulation and fast transient response to a step-load change, confirming the practicality and validity of this design method.
{"title":"Practical compensation circuit design of switched mode power supplies","authors":"K. Kittipeerachon, C. Bunlaksananusorn","doi":"10.1109/PEDS.2003.1283193","DOIUrl":"https://doi.org/10.1109/PEDS.2003.1283193","url":null,"abstract":"This paper presents practical switched mode power supplies (SMPS) compensation circuit design based on the frequency response method. The design is aided by matlab, which facilitates the formulation of transfer functions, construction of Bode plots, and calculation of compensation circuit component values. Design examples are given for a buck and a boost converters. Experimental results obtained from the prototype converters show good output voltage regulation and fast transient response to a step-load change, confirming the practicality and validity of this design method.","PeriodicalId":106054,"journal":{"name":"The Fifth International Conference on Power Electronics and Drive Systems, 2003. PEDS 2003.","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123125211","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 : 2003-11-17DOI: 10.1109/PEDS.2003.1283211
Wang Baocheng, Wu Wei-yang, Xiaofeng Sun, Wei Kun
A back propagation neural network is used in this paper to control the three phase converter input current with state vector PWM (SVPWM) performance. The paper presents some characters of the current modulator. To improve the performance in response of current, robustness and insensitivity to system parameters, a online training neural networks proportional integrate modulator is used. Simulation and experimental results are given out.
{"title":"Research on three-phase converter controller based on neural network technique","authors":"Wang Baocheng, Wu Wei-yang, Xiaofeng Sun, Wei Kun","doi":"10.1109/PEDS.2003.1283211","DOIUrl":"https://doi.org/10.1109/PEDS.2003.1283211","url":null,"abstract":"A back propagation neural network is used in this paper to control the three phase converter input current with state vector PWM (SVPWM) performance. The paper presents some characters of the current modulator. To improve the performance in response of current, robustness and insensitivity to system parameters, a online training neural networks proportional integrate modulator is used. Simulation and experimental results are given out.","PeriodicalId":106054,"journal":{"name":"The Fifth International Conference on Power Electronics and Drive Systems, 2003. PEDS 2003.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114119537","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 : 2003-11-17DOI: 10.1109/PEDS.2003.1282875
S. Vaez‐Zadeh, A. Payman
Single-phase induction motors suffer from low torque average and high torque pulsations. These problems can be overcome by a switching capacitor in series with the stator auxiliary winding. However, the switching of the capacitor requires the motor speed signal over the entire speed range to provide performance optimization in terms of high torque average and low torque pulsations. In this paper a simple speed estimation method for single-phase induction motors is proposed in the stationary reference frame to overcome the problems associated with the use of speed sensors. Based on this method, a sensorless torque optimization system is suggested. The system is then validated by extensive simulation results. The speed estimation method was used in the sensorless control of the motors.
{"title":"Sensorless performance optimization of single-phase induction motors","authors":"S. Vaez‐Zadeh, A. Payman","doi":"10.1109/PEDS.2003.1282875","DOIUrl":"https://doi.org/10.1109/PEDS.2003.1282875","url":null,"abstract":"Single-phase induction motors suffer from low torque average and high torque pulsations. These problems can be overcome by a switching capacitor in series with the stator auxiliary winding. However, the switching of the capacitor requires the motor speed signal over the entire speed range to provide performance optimization in terms of high torque average and low torque pulsations. In this paper a simple speed estimation method for single-phase induction motors is proposed in the stationary reference frame to overcome the problems associated with the use of speed sensors. Based on this method, a sensorless torque optimization system is suggested. The system is then validated by extensive simulation results. The speed estimation method was used in the sensorless control of the motors.","PeriodicalId":106054,"journal":{"name":"The Fifth International Conference on Power Electronics and Drive Systems, 2003. PEDS 2003.","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120893302","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 : 2003-11-17DOI: 10.1109/PEDS.2003.1282871
S. A. Molepo, H. Mouton
Multilevel inverters are often employed in remote areas, where they are only exposed to a high dc voltage, e.g. a flying capacitor multilevel inverter for DC reticulation. The need for isolated dc power supplies presents a major problem, since no ac voltage is allowed in close proximity of the inverters. This paper aims at investigating the design and the development of a self-starting SMPS for multilevel inverters in the quest for solving the dc power supply problem. A self-starting circuit is presented and its bootstrapped based principle of operation is discussed. A circuit for pre-charging the flying capacitors of the multilevel inverter prior to switching of the inverter is also presented.
{"title":"A self-starting switch mode power supply for multilevel inverters","authors":"S. A. Molepo, H. Mouton","doi":"10.1109/PEDS.2003.1282871","DOIUrl":"https://doi.org/10.1109/PEDS.2003.1282871","url":null,"abstract":"Multilevel inverters are often employed in remote areas, where they are only exposed to a high dc voltage, e.g. a flying capacitor multilevel inverter for DC reticulation. The need for isolated dc power supplies presents a major problem, since no ac voltage is allowed in close proximity of the inverters. This paper aims at investigating the design and the development of a self-starting SMPS for multilevel inverters in the quest for solving the dc power supply problem. A self-starting circuit is presented and its bootstrapped based principle of operation is discussed. A circuit for pre-charging the flying capacitors of the multilevel inverter prior to switching of the inverter is also presented.","PeriodicalId":106054,"journal":{"name":"The Fifth International Conference on Power Electronics and Drive Systems, 2003. PEDS 2003.","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121003302","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 : 2003-11-17DOI: 10.1109/PEDS.2003.1282954
N. Vishwanathan, V. Ramanarayanan
High voltage power supplies for radar applications are investigated, which are subjected to pulsed load (125 kHz and 10% duty cycle) with stringent specifications (<0.01% regulation, efficiency>85%, droop<0.5 V/micro-sec.). As good regulation and stable operation requires the converter to be switched at much higher frequency than the pulse load frequency, transformer poses serious problems of insulation failure and higher losses. Few converter topologies are proposed to tackle these problems. A study is made regarding the beat frequency oscillations that may exist with pulsed loading. It is illustrated with respect to the proposed converter topologies. Methods are proposed to eliminate or minimize these oscillations.
{"title":"Beat frequency oscillations in the output voltage of high voltage DC power supplies under pulsed loading","authors":"N. Vishwanathan, V. Ramanarayanan","doi":"10.1109/PEDS.2003.1282954","DOIUrl":"https://doi.org/10.1109/PEDS.2003.1282954","url":null,"abstract":"High voltage power supplies for radar applications are investigated, which are subjected to pulsed load (125 kHz and 10% duty cycle) with stringent specifications (<0.01% regulation, efficiency>85%, droop<0.5 V/micro-sec.). As good regulation and stable operation requires the converter to be switched at much higher frequency than the pulse load frequency, transformer poses serious problems of insulation failure and higher losses. Few converter topologies are proposed to tackle these problems. A study is made regarding the beat frequency oscillations that may exist with pulsed loading. It is illustrated with respect to the proposed converter topologies. Methods are proposed to eliminate or minimize these oscillations.","PeriodicalId":106054,"journal":{"name":"The Fifth International Conference on Power Electronics and Drive Systems, 2003. PEDS 2003.","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125252072","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 : 2003-11-17DOI: 10.1109/PEDS.2003.1283189
Lei Lin, Y. Zou, Jie Zhang, X. Zou
The conventional modulation strategies for diode-clamped three-phase three-level inverter have some disadvantages, such as switching loss of switching device. This paper presents a novel space vector pulse width modulation (SVPWM) scheme to reduce switching loss. Using this novel modulation strategy, the changing of switch states cause only one single phase voltage change every time. In this way, the inverter generates similar output voltage as that under the common strategies, whereas the switching loss is reduced. The proposed scheme has been digitally implemented by using TMS320F240 and its feasibility has been verified by the experimental results.
{"title":"Digital implementation of diode-clamped three-phase three-level SVPWM inverter","authors":"Lei Lin, Y. Zou, Jie Zhang, X. Zou","doi":"10.1109/PEDS.2003.1283189","DOIUrl":"https://doi.org/10.1109/PEDS.2003.1283189","url":null,"abstract":"The conventional modulation strategies for diode-clamped three-phase three-level inverter have some disadvantages, such as switching loss of switching device. This paper presents a novel space vector pulse width modulation (SVPWM) scheme to reduce switching loss. Using this novel modulation strategy, the changing of switch states cause only one single phase voltage change every time. In this way, the inverter generates similar output voltage as that under the common strategies, whereas the switching loss is reduced. The proposed scheme has been digitally implemented by using TMS320F240 and its feasibility has been verified by the experimental results.","PeriodicalId":106054,"journal":{"name":"The Fifth International Conference on Power Electronics and Drive Systems, 2003. PEDS 2003.","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122499505","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 : 2003-11-17DOI: 10.1109/PEDS.2003.1283138
Jia Yonghong, A. Khambadkone, R. Oruganti
One approach to build a large power inverter system is to use a cellular structure, in which many cells are paralleled to create a single inverter system. This method offers a reliable and flexible solution for a distributed power system. However, we also need to solve problems such as the synchronization of all paralleled cells in frequency, phase and amplitude to guarantee the output power sharing; the output current sharing of the parallel inverter to avoid circulating currents. This paper proposes a method to solve these problems. The simulation results and experimental ones are presented.
{"title":"Parallel operation of power electronic cells using serial communication for cell based converter architecture","authors":"Jia Yonghong, A. Khambadkone, R. Oruganti","doi":"10.1109/PEDS.2003.1283138","DOIUrl":"https://doi.org/10.1109/PEDS.2003.1283138","url":null,"abstract":"One approach to build a large power inverter system is to use a cellular structure, in which many cells are paralleled to create a single inverter system. This method offers a reliable and flexible solution for a distributed power system. However, we also need to solve problems such as the synchronization of all paralleled cells in frequency, phase and amplitude to guarantee the output power sharing; the output current sharing of the parallel inverter to avoid circulating currents. This paper proposes a method to solve these problems. The simulation results and experimental ones are presented.","PeriodicalId":106054,"journal":{"name":"The Fifth International Conference on Power Electronics and Drive Systems, 2003. PEDS 2003.","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122716500","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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