Pub Date : 2007-11-01DOI: 10.1109/PEDS.2007.4487695
P. Achara, P. Viriya, K. Matsuse
This paper presents a detailed analysis of circuit operation under ZVS and NON-ZVS conditions in a high-frequency half-bridge inverter for a small-size and low-voltage induction cooker, using the principle of positive- negative phase-shift control over a wide control range both in positive and negative directions. A variety of modes of circuit operation with the voltage and current equations during phase-shift power control under the operating conditions of ZVS and NON-ZVS are analyzed as a first step and the output voltage and current waveforms are obtained by MATLAB program. These waveforms will be analyzed by Fourier analysis which can lead further to the calculation of ac output power Po, dc input power Pd , and hence the conversion efficiency Tj of the half-bridge inverter. The analysis results shows that the control ranges of ac output power Po and dc input power Pd are limited by the occurrence of NON-ZVS operating condition, which changes according to the switching frequency fs .
{"title":"Analysis of a Half - Bridge Inverter for a Small-Size Induction Cooker Using Positive-Negative Phase-Shift Control under ZVS and NON-ZVS Operation","authors":"P. Achara, P. Viriya, K. Matsuse","doi":"10.1109/PEDS.2007.4487695","DOIUrl":"https://doi.org/10.1109/PEDS.2007.4487695","url":null,"abstract":"This paper presents a detailed analysis of circuit operation under ZVS and NON-ZVS conditions in a high-frequency half-bridge inverter for a small-size and low-voltage induction cooker, using the principle of positive- negative phase-shift control over a wide control range both in positive and negative directions. A variety of modes of circuit operation with the voltage and current equations during phase-shift power control under the operating conditions of ZVS and NON-ZVS are analyzed as a first step and the output voltage and current waveforms are obtained by MATLAB program. These waveforms will be analyzed by Fourier analysis which can lead further to the calculation of ac output power Po, dc input power Pd , and hence the conversion efficiency Tj of the half-bridge inverter. The analysis results shows that the control ranges of ac output power Po and dc input power Pd are limited by the occurrence of NON-ZVS operating condition, which changes according to the switching frequency fs .","PeriodicalId":166704,"journal":{"name":"2007 7th International Conference on Power Electronics and Drive Systems","volume":"65 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115883736","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 : 2007-11-01DOI: 10.1109/PEDS.2007.4487687
W. Fei, Yanli Zhang, Qi Wang
A novel bridge type FCL (fault current limiter) with single controllable switch is proposed in this paper. The topologies and control strategies of the new FCL for single-phase and three-phase power systems are investigated in detail. The advantage of the new FCL includes simplicity in circuit and control method, low cost and high reliability. Simulations based on Psim 6 are carried out. A three-phase experimental model is constructed. Simulation and experiment results proved the validity of the new FCL.
{"title":"A Novel Bridge Type FCL Based on Single Controllable Switch","authors":"W. Fei, Yanli Zhang, Qi Wang","doi":"10.1109/PEDS.2007.4487687","DOIUrl":"https://doi.org/10.1109/PEDS.2007.4487687","url":null,"abstract":"A novel bridge type FCL (fault current limiter) with single controllable switch is proposed in this paper. The topologies and control strategies of the new FCL for single-phase and three-phase power systems are investigated in detail. The advantage of the new FCL includes simplicity in circuit and control method, low cost and high reliability. Simulations based on Psim 6 are carried out. A three-phase experimental model is constructed. Simulation and experiment results proved the validity of the new FCL.","PeriodicalId":166704,"journal":{"name":"2007 7th International Conference on Power Electronics and Drive Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130469416","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 : 2007-11-01DOI: 10.1109/PEDS.2007.4487823
D. Dorrell
This paper puts forward an analytical model for representing a doubly-fed reluctance machine using rotating field theory and permeance harmonics. The radially-laminated version of the rotor is described then a machine is developed using the theory. The algorithm is implemented and a design for a 7.5 kW machine is developed to illustrate the sizing required. The machine is of a 2/6 pole arrangement. The paper illustrates that the stator should be specially manufactured because the slots need to be able to cope with a much higher electric loading than an equivalent induction machine. The paper also shows that there is still much work to be done in terms of being able to design and specify this type of novel machine.
{"title":"Design Requirements for Doubly-Fed Reluctance Generators","authors":"D. Dorrell","doi":"10.1109/PEDS.2007.4487823","DOIUrl":"https://doi.org/10.1109/PEDS.2007.4487823","url":null,"abstract":"This paper puts forward an analytical model for representing a doubly-fed reluctance machine using rotating field theory and permeance harmonics. The radially-laminated version of the rotor is described then a machine is developed using the theory. The algorithm is implemented and a design for a 7.5 kW machine is developed to illustrate the sizing required. The machine is of a 2/6 pole arrangement. The paper illustrates that the stator should be specially manufactured because the slots need to be able to cope with a much higher electric loading than an equivalent induction machine. The paper also shows that there is still much work to be done in terms of being able to design and specify this type of novel machine.","PeriodicalId":166704,"journal":{"name":"2007 7th International Conference on Power Electronics and Drive Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132836118","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 : 2007-11-01DOI: 10.1109/PEDS.2007.4487764
D. Sousa, A. Ferraz
A power supply with potential use in the magnetic stimulation of biological systems is presented in this paper. The effect of the magnetic stimulation depends on the geometry and orientation of the induced electric field, as well as on the current pulse waveform delivered by the stimulator (coil). These factors are very important to define the equipment requirements and characteristics, namely the topology of the power supply and the size and geometry of the coil. The proposed solution is able to generate current pulses with variable amplitude and duration, according to a user- defined input. The main characteristics and the working principle, including the strategy of control, are described. In order to design, to analyse and to verify the performance of the developed power supply, both simulation and experimental results are presented. The proposed solution is based on a topology that uses elements to store and transfer energy from the power source to the load. With the proposed topology, an adequate control strategy and right set of the power circuit parameters it is possible to obtain either unipolar waves or bipolar waves.
{"title":"Power Supply with Potential Use in Magnetic Stimulation","authors":"D. Sousa, A. Ferraz","doi":"10.1109/PEDS.2007.4487764","DOIUrl":"https://doi.org/10.1109/PEDS.2007.4487764","url":null,"abstract":"A power supply with potential use in the magnetic stimulation of biological systems is presented in this paper. The effect of the magnetic stimulation depends on the geometry and orientation of the induced electric field, as well as on the current pulse waveform delivered by the stimulator (coil). These factors are very important to define the equipment requirements and characteristics, namely the topology of the power supply and the size and geometry of the coil. The proposed solution is able to generate current pulses with variable amplitude and duration, according to a user- defined input. The main characteristics and the working principle, including the strategy of control, are described. In order to design, to analyse and to verify the performance of the developed power supply, both simulation and experimental results are presented. The proposed solution is based on a topology that uses elements to store and transfer energy from the power source to the load. With the proposed topology, an adequate control strategy and right set of the power circuit parameters it is possible to obtain either unipolar waves or bipolar waves.","PeriodicalId":166704,"journal":{"name":"2007 7th International Conference on Power Electronics and Drive Systems","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127579857","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 : 2007-11-01DOI: 10.1109/PEDS.2007.4487874
B. Sawetsakulanond, V. Kinnaraes
This paper proposes the performance analysis and comparative study between standard and high efficiency squirrel cage self- excited induction generators (SEIG). Consideration of capacitance of SEIG based on equivalent circuit model is given. Testing and performance comparison under dynamic and steady state conditions for both pure resistive and resistive - inductive load conditions have been made. The interpretation of experimental results can be guidelines for effective design and development of SEIG for wind energy applications.
{"title":"Analysis and Comparative Study on the Performance between Standard and High Efficiency Induction Machines operating as Self - Excited Induction Generators","authors":"B. Sawetsakulanond, V. Kinnaraes","doi":"10.1109/PEDS.2007.4487874","DOIUrl":"https://doi.org/10.1109/PEDS.2007.4487874","url":null,"abstract":"This paper proposes the performance analysis and comparative study between standard and high efficiency squirrel cage self- excited induction generators (SEIG). Consideration of capacitance of SEIG based on equivalent circuit model is given. Testing and performance comparison under dynamic and steady state conditions for both pure resistive and resistive - inductive load conditions have been made. The interpretation of experimental results can be guidelines for effective design and development of SEIG for wind energy applications.","PeriodicalId":166704,"journal":{"name":"2007 7th International Conference on Power Electronics and Drive Systems","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132822154","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 : 2007-11-01DOI: 10.1109/PEDS.2007.4487884
M. Hasegawa, S. Yoshioka, K. Matsui
This paper proposes a new position estimation method for Interior Permanent Magnet Synchronous Motor(IPMSM) drives fed by over- modulation mode PWM voltage source inverter. It is being attractive to expand drive region of IPMSM to high speed range for application to electric vehicles, electrical household appliance and so on. Although over-modulation mode PWM voltage source inverter makes it possible to solve above problems, position sensorless drive based on sta- tor voltage knowledge cannot directly be utilized because voltage reference is not equal to inverter output voltage. In this paper, un-known input observer is proposed to estimate rotor position without stator voltage knowledge.
{"title":"Position Estimation of Permanent Magnet Synchronous Motor Using Un-known Input Observer","authors":"M. Hasegawa, S. Yoshioka, K. Matsui","doi":"10.1109/PEDS.2007.4487884","DOIUrl":"https://doi.org/10.1109/PEDS.2007.4487884","url":null,"abstract":"This paper proposes a new position estimation method for Interior Permanent Magnet Synchronous Motor(IPMSM) drives fed by over- modulation mode PWM voltage source inverter. It is being attractive to expand drive region of IPMSM to high speed range for application to electric vehicles, electrical household appliance and so on. Although over-modulation mode PWM voltage source inverter makes it possible to solve above problems, position sensorless drive based on sta- tor voltage knowledge cannot directly be utilized because voltage reference is not equal to inverter output voltage. In this paper, un-known input observer is proposed to estimate rotor position without stator voltage knowledge.","PeriodicalId":166704,"journal":{"name":"2007 7th International Conference on Power Electronics and Drive Systems","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132951641","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 : 2007-11-01DOI: 10.1109/PEDS.2007.4487722
M. Rentzsch, H. Guldner, C. Ditmanson
An asymmetrically switched class D inverter with a series-parallel resonant tank and a Walton Cockroft voltage multiplier for medium power, high voltage applications is presented. This converter operates in a self sustained oscillation mode above the resonant frequency and is controlled by varying the duty cycle of one switch. A straightforward procedure for designing the converter is given. Furthermore, this paper shows the benefits of digital implementation of the carrier signal.
{"title":"Design of an Adjustable High Output Voltage Asymmetrically Switched Class D Converter","authors":"M. Rentzsch, H. Guldner, C. Ditmanson","doi":"10.1109/PEDS.2007.4487722","DOIUrl":"https://doi.org/10.1109/PEDS.2007.4487722","url":null,"abstract":"An asymmetrically switched class D inverter with a series-parallel resonant tank and a Walton Cockroft voltage multiplier for medium power, high voltage applications is presented. This converter operates in a self sustained oscillation mode above the resonant frequency and is controlled by varying the duty cycle of one switch. A straightforward procedure for designing the converter is given. Furthermore, this paper shows the benefits of digital implementation of the carrier signal.","PeriodicalId":166704,"journal":{"name":"2007 7th International Conference on Power Electronics and Drive Systems","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132189432","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 : 2007-11-01DOI: 10.1109/PEDS.2007.4487789
F. Kurokawa, S. Sukita
We have already reported the novel digital control method "Static Model Reference" which is the improved smart digital reference of output voltage. In this case, the VCO (voltage controlled oscillator) is used as A/D signal converter because it has superior response and is low cost. However, prior attempts to improve the transient response have been inconclusive because this model depends on the steady-state analysis. This paper presents a new model control method of switching dc-dc converter to improve the dynamic characteristics. Furthermore, the relationship between the parameters of control circuit and the dynamic characteristics is discussed. As a result, it is seen that the dc-dc converter with a new model control has a superior transient response compared with that of the conventional control. Especially, the overshoot of the reactor current is suppressed to within 34% and this result is approximately 30% smaller than that of the conventional "static model reference" control.
{"title":"A New Model Control DC-DC Converter to Improve Dynamic Characteristics","authors":"F. Kurokawa, S. Sukita","doi":"10.1109/PEDS.2007.4487789","DOIUrl":"https://doi.org/10.1109/PEDS.2007.4487789","url":null,"abstract":"We have already reported the novel digital control method \"Static Model Reference\" which is the improved smart digital reference of output voltage. In this case, the VCO (voltage controlled oscillator) is used as A/D signal converter because it has superior response and is low cost. However, prior attempts to improve the transient response have been inconclusive because this model depends on the steady-state analysis. This paper presents a new model control method of switching dc-dc converter to improve the dynamic characteristics. Furthermore, the relationship between the parameters of control circuit and the dynamic characteristics is discussed. As a result, it is seen that the dc-dc converter with a new model control has a superior transient response compared with that of the conventional control. Especially, the overshoot of the reactor current is suppressed to within 34% and this result is approximately 30% smaller than that of the conventional \"static model reference\" control.","PeriodicalId":166704,"journal":{"name":"2007 7th International Conference on Power Electronics and Drive Systems","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133248770","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 : 2007-11-01DOI: 10.1109/PEDS.2007.4487754
Chien-Lung Cheng, J. Yeh, S. Chern, Yi-Hung Lan
Inrush current is an important issue for three-phase transformers security and stability. It has close relationship with flux variation of three-phase transformers. Harmonic effects in power systems have been significantly increasing in the last decade. It results in more complicated for investigating inrush current. In this paper, SINm(omegat) waveforms represent non-sinusoidal waveforms because studies on SINm(omegat) waveforms appear to be simpler for more predictable results. A flux analysis of three-phase transformer for inrush current is proposed in this paper. The results are very helpful to estimate harmonics effect for inrush current.
{"title":"Analysis of Transformer Inrush Current under Harmonic Source","authors":"Chien-Lung Cheng, J. Yeh, S. Chern, Yi-Hung Lan","doi":"10.1109/PEDS.2007.4487754","DOIUrl":"https://doi.org/10.1109/PEDS.2007.4487754","url":null,"abstract":"Inrush current is an important issue for three-phase transformers security and stability. It has close relationship with flux variation of three-phase transformers. Harmonic effects in power systems have been significantly increasing in the last decade. It results in more complicated for investigating inrush current. In this paper, SINm(omegat) waveforms represent non-sinusoidal waveforms because studies on SINm(omegat) waveforms appear to be simpler for more predictable results. A flux analysis of three-phase transformer for inrush current is proposed in this paper. The results are very helpful to estimate harmonics effect for inrush current.","PeriodicalId":166704,"journal":{"name":"2007 7th International Conference on Power Electronics and Drive Systems","volume":"13 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128866780","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 : 2007-11-01DOI: 10.1109/PEDS.2007.4487808
C. S. Soh, C. Bi, K. Teo
For the reduction of acoustic noise and vibration generated in self-sensing brushless dc motor operation, a self-sensing quasi brushless DC drive (QBLDC) mode is presented. The structure of the drive and the related algorithms are introduced in detail in the paper. The drive can be implemented on field programmable gate arrays (FPGA). The performance of the drive presented has been confirmed by the testing results of the spindle motor used in hard disk drive.
{"title":"FPGA Implementation of Quasi-BLDC Drive","authors":"C. S. Soh, C. Bi, K. Teo","doi":"10.1109/PEDS.2007.4487808","DOIUrl":"https://doi.org/10.1109/PEDS.2007.4487808","url":null,"abstract":"For the reduction of acoustic noise and vibration generated in self-sensing brushless dc motor operation, a self-sensing quasi brushless DC drive (QBLDC) mode is presented. The structure of the drive and the related algorithms are introduced in detail in the paper. The drive can be implemented on field programmable gate arrays (FPGA). The performance of the drive presented has been confirmed by the testing results of the spindle motor used in hard disk drive.","PeriodicalId":166704,"journal":{"name":"2007 7th International Conference on Power Electronics and Drive Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131321377","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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