Pub Date : 2007-04-02DOI: 10.1109/PCCON.2007.373017
K. Seki
The paper develops active filters according to spiral vector theory that has a definition of instantaneous reactive power in single-phase networks. At first, the paper obtains rms active and reactive power with integral method and shows that they are the same in a steady state condition and in a transient state condition, then it obtains the system voltage with least square method and the system current that has a sinusoidal waveform. The harmonic currents are equal to the load current minus the system current and it used as the output of an active filter.
{"title":"Development of Active Filters with Spiral Vector Theory","authors":"K. Seki","doi":"10.1109/PCCON.2007.373017","DOIUrl":"https://doi.org/10.1109/PCCON.2007.373017","url":null,"abstract":"The paper develops active filters according to spiral vector theory that has a definition of instantaneous reactive power in single-phase networks. At first, the paper obtains rms active and reactive power with integral method and shows that they are the same in a steady state condition and in a transient state condition, then it obtains the system voltage with least square method and the system current that has a sinusoidal waveform. The harmonic currents are equal to the load current minus the system current and it used as the output of an active filter.","PeriodicalId":325362,"journal":{"name":"2007 Power Conversion Conference - Nagoya","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114385584","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 : 2007-04-02DOI: 10.1109/PCCON.2007.372986
T. Fukumoto, H. Hamane
This paper proposes the performance improvement methods for the IPMSM position sensor-less vector control system. The stability of the position sensor-less control is influenced by the motor parameter error and dead time compensation error. Especially, it becomes problem in case of the extreme temperature variation and at low speed. The influence on the position estimation is analyzed for the proposed method which using an armature current flux adaptive observer. For performance improvement and simplification of control system, the offline parameter measurement of a stator resistance, permanent magnet flux, d,q-axis inductances, and dead-time compensation are proposed. And the on-line parameter error compensation method is applied to reduce the position error, which uses only the observer signal without any additional sensor or signal injection. In addition, the practical dead-time compensation method is proposed based on the experimental measurement. Experimental results of the test system using the proposed methods showed good performance.
{"title":"Performance Improvement of the IPMSM Position Sensor-less Vector Control System by the On-line Motor Parameter Error Compensation and the Practical Dead-time Compensation","authors":"T. Fukumoto, H. Hamane","doi":"10.1109/PCCON.2007.372986","DOIUrl":"https://doi.org/10.1109/PCCON.2007.372986","url":null,"abstract":"This paper proposes the performance improvement methods for the IPMSM position sensor-less vector control system. The stability of the position sensor-less control is influenced by the motor parameter error and dead time compensation error. Especially, it becomes problem in case of the extreme temperature variation and at low speed. The influence on the position estimation is analyzed for the proposed method which using an armature current flux adaptive observer. For performance improvement and simplification of control system, the offline parameter measurement of a stator resistance, permanent magnet flux, d,q-axis inductances, and dead-time compensation are proposed. And the on-line parameter error compensation method is applied to reduce the position error, which uses only the observer signal without any additional sensor or signal injection. In addition, the practical dead-time compensation method is proposed based on the experimental measurement. Experimental results of the test system using the proposed methods showed good performance.","PeriodicalId":325362,"journal":{"name":"2007 Power Conversion Conference - Nagoya","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122692748","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 : 2007-04-02DOI: 10.1109/PCCON.2007.372975
Min-huei Kim, W. Baik, Dong-Hee Kim, Kyeong-Ho Choi
This paper presents a high performance position control system of switched reluctance motor (SRM). Recently, the variable-speed and servo drive systems have been developed because of industrial automation. One of the possible electrical machines in modern servo drive system is the SRM. The control of SRM drive system requires several controllers including switching angle and current controller. Generally switching angle controller is used to increase the drive efficiency, while current controller is adapted to control the electromagnetic torque and to prohibit the over-current. Due to the development of high performance micro-controllers, such as TMS320F2812 Digital Signal Processor (DSP), many complicated control algorithms can be realized. In this paper, a position control system of SRM is suggested to verify the possibility of SRM in servo drive application. A prototype 1-hp SRM is used to prove the validity of this algorithm.
{"title":"A High Performance Position Control System of Switched Reluctance Motor","authors":"Min-huei Kim, W. Baik, Dong-Hee Kim, Kyeong-Ho Choi","doi":"10.1109/PCCON.2007.372975","DOIUrl":"https://doi.org/10.1109/PCCON.2007.372975","url":null,"abstract":"This paper presents a high performance position control system of switched reluctance motor (SRM). Recently, the variable-speed and servo drive systems have been developed because of industrial automation. One of the possible electrical machines in modern servo drive system is the SRM. The control of SRM drive system requires several controllers including switching angle and current controller. Generally switching angle controller is used to increase the drive efficiency, while current controller is adapted to control the electromagnetic torque and to prohibit the over-current. Due to the development of high performance micro-controllers, such as TMS320F2812 Digital Signal Processor (DSP), many complicated control algorithms can be realized. In this paper, a position control system of SRM is suggested to verify the possibility of SRM in servo drive application. A prototype 1-hp SRM is used to prove the validity of this algorithm.","PeriodicalId":325362,"journal":{"name":"2007 Power Conversion Conference - Nagoya","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122877943","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 : 2007-04-02DOI: 10.1109/PCCON.2007.373006
R. Yamada, N. Kobayashi, K. Mino
We have developed a small-size high-efficiency grid-connected converter system for a 1 kW PEFC (polymer electrolyte fuel cell) unit, which consists of a novel isolated DC-DC converter and a single-phase inverter whose output voltage is 200 V. In order to reduce reverse recovery losses of diodes in the secondary circuit of the DC-DC converter, two rectifiers with 600 V diodes and an inductor connected in series are employed instead of one rectifier with higher voltage diodes that have a slow reverse recovery characteristic. Furthermore, we have applied a new low-loss clamp-type snubber to the diodes. The efficiency of the converter system is 91.1%, and the efficiency of the DC-DC converter in the system is 94.6% at the nominal condition.
{"title":"A 1kW Grid-Connected Converter System for PEFC","authors":"R. Yamada, N. Kobayashi, K. Mino","doi":"10.1109/PCCON.2007.373006","DOIUrl":"https://doi.org/10.1109/PCCON.2007.373006","url":null,"abstract":"We have developed a small-size high-efficiency grid-connected converter system for a 1 kW PEFC (polymer electrolyte fuel cell) unit, which consists of a novel isolated DC-DC converter and a single-phase inverter whose output voltage is 200 V. In order to reduce reverse recovery losses of diodes in the secondary circuit of the DC-DC converter, two rectifiers with 600 V diodes and an inductor connected in series are employed instead of one rectifier with higher voltage diodes that have a slow reverse recovery characteristic. Furthermore, we have applied a new low-loss clamp-type snubber to the diodes. The efficiency of the converter system is 91.1%, and the efficiency of the DC-DC converter in the system is 94.6% at the nominal condition.","PeriodicalId":325362,"journal":{"name":"2007 Power Conversion Conference - Nagoya","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126835024","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 : 2007-04-02DOI: 10.1109/PCCON.2007.372969
A. Shibaike, M. Sanada, S. Morimoto
Wave power generation as an alternative energy source should be considered in Japan. Wave power generation has been studied in Japan, but has not been widely applied. The current method of wave power generation has disadvantages, in that the equipment is huge and expensive, because the generator is driven with an air turbine. Recently, research has looked into using a linear generator. In this paper, the characteristics of two typical linear generators are compared by analysis using a finite element method (FEM), and the relationship between pole pitch and losses in the linear synchronous generators is investigated for wave power generation. Furthermore, the arrangement structure of permanent magnets is examined.
{"title":"Suitable Configuration of Permanent Magnet Linear Synchronous Generator for Wave Power Generation","authors":"A. Shibaike, M. Sanada, S. Morimoto","doi":"10.1109/PCCON.2007.372969","DOIUrl":"https://doi.org/10.1109/PCCON.2007.372969","url":null,"abstract":"Wave power generation as an alternative energy source should be considered in Japan. Wave power generation has been studied in Japan, but has not been widely applied. The current method of wave power generation has disadvantages, in that the equipment is huge and expensive, because the generator is driven with an air turbine. Recently, research has looked into using a linear generator. In this paper, the characteristics of two typical linear generators are compared by analysis using a finite element method (FEM), and the relationship between pole pitch and losses in the linear synchronous generators is investigated for wave power generation. Furthermore, the arrangement structure of permanent magnets is examined.","PeriodicalId":325362,"journal":{"name":"2007 Power Conversion Conference - Nagoya","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131466633","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 : 2007-04-02DOI: 10.1109/PCCON.2007.372956
Y. Nakamura, H. Funato, S. Ogasawara
The objective of this paper is analysis of output voltage distortion of a PWM inverter with LC filter caused by device voltage drop. The goal of this study is to find out how to compensate the output voltage distortion of PWM inverter caused by device voltage drop to realize precise output voltage. The output voltage distortion is mainly caused by dead time and device voltage drop. There are a lot of studies about distortion is mainly caused by dead time. There are, however, only few studies about device voltage drop. especially considering LC filter effect. In this paper, the authors theoretically derived the output voltage distortion of PWM inverter with LC filter caused by device voltage drop in order to estimate the distortion caused by drop in advance. The distortion was analyzed from the view point of frequency analysis and total harmonic distortion (THD). These results may allow appropriate design of PWM inverter with output voltage compensation. Theoretical analysis was verified through simulations and experiments.
{"title":"Output Voltage Distortion Analysis of PWM Inverter With LC Filter Caused by Device Voltage Drop","authors":"Y. Nakamura, H. Funato, S. Ogasawara","doi":"10.1109/PCCON.2007.372956","DOIUrl":"https://doi.org/10.1109/PCCON.2007.372956","url":null,"abstract":"The objective of this paper is analysis of output voltage distortion of a PWM inverter with LC filter caused by device voltage drop. The goal of this study is to find out how to compensate the output voltage distortion of PWM inverter caused by device voltage drop to realize precise output voltage. The output voltage distortion is mainly caused by dead time and device voltage drop. There are a lot of studies about distortion is mainly caused by dead time. There are, however, only few studies about device voltage drop. especially considering LC filter effect. In this paper, the authors theoretically derived the output voltage distortion of PWM inverter with LC filter caused by device voltage drop in order to estimate the distortion caused by drop in advance. The distortion was analyzed from the view point of frequency analysis and total harmonic distortion (THD). These results may allow appropriate design of PWM inverter with output voltage compensation. Theoretical analysis was verified through simulations and experiments.","PeriodicalId":325362,"journal":{"name":"2007 Power Conversion Conference - Nagoya","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133069037","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 : 2007-04-02DOI: 10.1109/PCCON.2007.372950
S. Masukawa, S. Iida
In this paper, a double connected three-phase hybrid rectifier employing thyristors and self-turn-off devices without input transformers is proposed. Two three-phase bridge rectifiers with auxiliary circuit injecting harmonic currents are connected in parallel. This system can be performed as the conventional 24-step rectifier on the optimum conditions. In this paper, circuit performances of the proposed method are discussed by graphical analysis, and optimum parameters are derived. Then, effects on harmonics reduction can be clarified by simulations.
{"title":"A Method for Reducing Harmonics in Input Current of Double Connected Three-Phase Hybrid Rectifier without Input Transformers","authors":"S. Masukawa, S. Iida","doi":"10.1109/PCCON.2007.372950","DOIUrl":"https://doi.org/10.1109/PCCON.2007.372950","url":null,"abstract":"In this paper, a double connected three-phase hybrid rectifier employing thyristors and self-turn-off devices without input transformers is proposed. Two three-phase bridge rectifiers with auxiliary circuit injecting harmonic currents are connected in parallel. This system can be performed as the conventional 24-step rectifier on the optimum conditions. In this paper, circuit performances of the proposed method are discussed by graphical analysis, and optimum parameters are derived. Then, effects on harmonics reduction can be clarified by simulations.","PeriodicalId":325362,"journal":{"name":"2007 Power Conversion Conference - Nagoya","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133184516","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 : 2007-04-02DOI: 10.1109/PCCON.2007.373123
A. Hashizaka, H. Oka, M. Nakamura, S. Funabiki, M. Yamamoto, S. Nagai, M. Tsuruya
Improvement of DC-DC converter side in SMPS system is discussed in this paper. A novel forward type soft switching DC-DC converter topology with neutral point inductor connected auxiliary resonant snubber (NPC-ARS) circuit is presented in this paper for the switching mode power supply applications. Its circuit operation and its performance characteristics of the forward type soft switching DC-DC converter is described and discussed on the bases of experimental results.
{"title":"High Efficiency Low Noise SMPS System - DC-DC Converter Side","authors":"A. Hashizaka, H. Oka, M. Nakamura, S. Funabiki, M. Yamamoto, S. Nagai, M. Tsuruya","doi":"10.1109/PCCON.2007.373123","DOIUrl":"https://doi.org/10.1109/PCCON.2007.373123","url":null,"abstract":"Improvement of DC-DC converter side in SMPS system is discussed in this paper. A novel forward type soft switching DC-DC converter topology with neutral point inductor connected auxiliary resonant snubber (NPC-ARS) circuit is presented in this paper for the switching mode power supply applications. Its circuit operation and its performance characteristics of the forward type soft switching DC-DC converter is described and discussed on the bases of experimental results.","PeriodicalId":325362,"journal":{"name":"2007 Power Conversion Conference - Nagoya","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121188943","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 : 2007-04-02DOI: 10.1109/PCCON.2007.372967
S. Shinnaka
Phase, frequency, and amplitude of single-phase voltages are the most important and basic information required for single-phase grid connected applications. This paper proposes a new method for estimating instantly and adaptively phase, frequency, and amplitude of frequency-varying single-phase signals for such applications, which is a new PLL method based on a new structure. The proposed method has the following attractive features: 1) the estimation system results in a nonlinear system, but it can be stabilized; 2) all subsystems constructing the system can be easily designed; 3) two-phase signal generator can tune a single system-parameter adaptively to varying frequency of the injected signal; 4) high order PLL-controllers allowing fast tracking can be stably used; 5) even in hostile envelopments, favorable instant estimates can be obtained. This paper proposes the estimation method, and verifies its usefulness by extensive numerical experiments.
{"title":"A New Frequency-Adaptive Phase-Estimation Method Based on a New PLL Structure for Single-Phase Signals","authors":"S. Shinnaka","doi":"10.1109/PCCON.2007.372967","DOIUrl":"https://doi.org/10.1109/PCCON.2007.372967","url":null,"abstract":"Phase, frequency, and amplitude of single-phase voltages are the most important and basic information required for single-phase grid connected applications. This paper proposes a new method for estimating instantly and adaptively phase, frequency, and amplitude of frequency-varying single-phase signals for such applications, which is a new PLL method based on a new structure. The proposed method has the following attractive features: 1) the estimation system results in a nonlinear system, but it can be stabilized; 2) all subsystems constructing the system can be easily designed; 3) two-phase signal generator can tune a single system-parameter adaptively to varying frequency of the injected signal; 4) high order PLL-controllers allowing fast tracking can be stably used; 5) even in hostile envelopments, favorable instant estimates can be obtained. This paper proposes the estimation method, and verifies its usefulness by extensive numerical experiments.","PeriodicalId":325362,"journal":{"name":"2007 Power Conversion Conference - Nagoya","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121386227","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 : 2007-04-02DOI: 10.1109/PCCON.2007.373091
A. Bryant, G. Roberts, A. Walker, P. Mawby
This paper presents an integrated framework for modelling inverter performance and evaluating power devices in hybrid electric vehicle drives. Based in MATLAB/Simulink, it uses a novel method of decoupling the device and inverter simulation to maintain high accuracy of power losses and devices temperatures, and achieve faster than real time inverter simulation. An illustration is given for a full hybrid vehicle for different driving cycles. Device models are included for silicon carbide Schottky diodes as well as silicon IGBTs and PIN diodes, allowing evaluation of the new material devices. The simulation framework offers the potential to rapidly improve the inverter and powertrain design process, and to evaluate device selection quickly.
{"title":"Fast Inverter Loss Simulation and Silicon Carbide Device Evaluation for Hybrid Electric Vehicle Drives","authors":"A. Bryant, G. Roberts, A. Walker, P. Mawby","doi":"10.1109/PCCON.2007.373091","DOIUrl":"https://doi.org/10.1109/PCCON.2007.373091","url":null,"abstract":"This paper presents an integrated framework for modelling inverter performance and evaluating power devices in hybrid electric vehicle drives. Based in MATLAB/Simulink, it uses a novel method of decoupling the device and inverter simulation to maintain high accuracy of power losses and devices temperatures, and achieve faster than real time inverter simulation. An illustration is given for a full hybrid vehicle for different driving cycles. Device models are included for silicon carbide Schottky diodes as well as silicon IGBTs and PIN diodes, allowing evaluation of the new material devices. The simulation framework offers the potential to rapidly improve the inverter and powertrain design process, and to evaluate device selection quickly.","PeriodicalId":325362,"journal":{"name":"2007 Power Conversion Conference - Nagoya","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128858230","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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