This paper presents an efficiency optimized speed control scheme of field oriented induction motor. In order to take core loss into account, we insert a core loss resistance in parallel to internal induced voltage branch into the d-q axes equivalent circuit. The optimum efficiency controller is to realize the optimum slip angular frequency to minimize the controllable losses composed of copper losses and core loss by rotor flux weakening under field oriented control. We construct the speed control system with efficiency optimization applied on optimal regulator theory. The effectiveness of this control scheme is confirmed by simulation results.
{"title":"Efficiency optimized speed control of field oriented induction motor including core loss","authors":"A. Mannan, T. Murata, J. Tamura, T. Tsuchiya","doi":"10.1109/PCC.2002.998164","DOIUrl":"https://doi.org/10.1109/PCC.2002.998164","url":null,"abstract":"This paper presents an efficiency optimized speed control scheme of field oriented induction motor. In order to take core loss into account, we insert a core loss resistance in parallel to internal induced voltage branch into the d-q axes equivalent circuit. The optimum efficiency controller is to realize the optimum slip angular frequency to minimize the controllable losses composed of copper losses and core loss by rotor flux weakening under field oriented control. We construct the speed control system with efficiency optimization applied on optimal regulator theory. The effectiveness of this control scheme is confirmed by simulation results.","PeriodicalId":320424,"journal":{"name":"Proceedings of the Power Conversion Conference-Osaka 2002 (Cat. No.02TH8579)","volume":"499 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130961388","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}
G. Takata, J. Tahara, M. Michihira, A. Tsuyoshi, K. Amako, H. Omori, K. Yasui
The time frequency analysis technique using wavelet transform is proposed to overcome EMC (electromagnetic compatibility) problems. The proposed technique takes into consideration the change in amplitude of the harmonics during the observation. By applying it to harmonics analysis, we can analyze the harmonics from not only the frequency but also the time point of view. Therefore, it enables us to obtain the effective solution for harmonics problems. In this paper, a wavelet transform is carried out against the actual measured data. Based on obtained results, it is shown that the features and high validity of the proposed technique for the power electronics field by comparing with the previous approach using FFT (fast Fourier transform).
{"title":"The time-frequency analysis of the harmonics with wavelet transform for the power electronics systems","authors":"G. Takata, J. Tahara, M. Michihira, A. Tsuyoshi, K. Amako, H. Omori, K. Yasui","doi":"10.1109/PCC.2002.997610","DOIUrl":"https://doi.org/10.1109/PCC.2002.997610","url":null,"abstract":"The time frequency analysis technique using wavelet transform is proposed to overcome EMC (electromagnetic compatibility) problems. The proposed technique takes into consideration the change in amplitude of the harmonics during the observation. By applying it to harmonics analysis, we can analyze the harmonics from not only the frequency but also the time point of view. Therefore, it enables us to obtain the effective solution for harmonics problems. In this paper, a wavelet transform is carried out against the actual measured data. Based on obtained results, it is shown that the features and high validity of the proposed technique for the power electronics field by comparing with the previous approach using FFT (fast Fourier transform).","PeriodicalId":320424,"journal":{"name":"Proceedings of the Power Conversion Conference-Osaka 2002 (Cat. No.02TH8579)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130989808","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}
We propose a harmonics compensator for the utility line voltage distortion by connecting the sinusoidal voltage generated by the PWM converters to the AC line to be compensated point. This connecting point is adjustable by changing the feed back gain k. Adjusting the gain k, the capacity of the PWM converter and the suppression characteristics become controllable. This compensator can reduce or compensate the common utility line voltage distortion derived from the downstream utility source voltage harmonics and the upstream load current harmonics at the same time. In this paper, we describe the basic principle of the control method, the control system of the compensator constructed by the sinusoidal PWM converter. And then, we show some operating waveforms for both the case of the downstream voltage distortion and the upstream harmonics current from the nonlinear loads by simulation analysis to verify the feasibility.
{"title":"Harmonics compensator by connecting sinusoidal voltage PWM converters","authors":"T. Ohnishi, M. Hojo","doi":"10.1109/PCC.2002.998178","DOIUrl":"https://doi.org/10.1109/PCC.2002.998178","url":null,"abstract":"We propose a harmonics compensator for the utility line voltage distortion by connecting the sinusoidal voltage generated by the PWM converters to the AC line to be compensated point. This connecting point is adjustable by changing the feed back gain k. Adjusting the gain k, the capacity of the PWM converter and the suppression characteristics become controllable. This compensator can reduce or compensate the common utility line voltage distortion derived from the downstream utility source voltage harmonics and the upstream load current harmonics at the same time. In this paper, we describe the basic principle of the control method, the control system of the compensator constructed by the sinusoidal PWM converter. And then, we show some operating waveforms for both the case of the downstream voltage distortion and the upstream harmonics current from the nonlinear loads by simulation analysis to verify the feasibility.","PeriodicalId":320424,"journal":{"name":"Proceedings of the Power Conversion Conference-Osaka 2002 (Cat. No.02TH8579)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130221092","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}
The interior permanent magnet (IPM) motor drive is an interesting solution for several applications and it is becoming a competitor for the commonly-used surface mounted PM motor. In this paper, some design criteria of this kind of motor are presented, focusing on the high performance applications. Different aspects in its design are presented, highlighting the main applications in which it presents the best performance: high-torque, low inertia, high dynamics. Thanks to the anisotropy of the rotor, this kind of motor is suitable for flux-weakening operations, thus it is used for high-speed applications such as machine tools or electrical vehicles. Several details and experimental results also included in the paper.
{"title":"Interior PM synchronous motor for high performance applications","authors":"N. Bianchi, S. Bolognani","doi":"10.1109/PCC.2002.998538","DOIUrl":"https://doi.org/10.1109/PCC.2002.998538","url":null,"abstract":"The interior permanent magnet (IPM) motor drive is an interesting solution for several applications and it is becoming a competitor for the commonly-used surface mounted PM motor. In this paper, some design criteria of this kind of motor are presented, focusing on the high performance applications. Different aspects in its design are presented, highlighting the main applications in which it presents the best performance: high-torque, low inertia, high dynamics. Thanks to the anisotropy of the rotor, this kind of motor is suitable for flux-weakening operations, thus it is used for high-speed applications such as machine tools or electrical vehicles. Several details and experimental results also included in the paper.","PeriodicalId":320424,"journal":{"name":"Proceedings of the Power Conversion Conference-Osaka 2002 (Cat. No.02TH8579)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129037819","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}
The paper introduces a precision switching mode AC/AC power supply unit, that has been developed for calibration of current transformers. The device is fed by the 220 V 50/60 Hz mains, the output power is 3 kVA, and the output frequency is 50 or 60 Hz, which can be selected from the program. Large current control ratio, low level harmonic content of the output current, high accuracy, high resolution, high precision are the most important demands. Data transfer interface between the device and a supervisory computer is also necessary. Due to the large control ratio a two-stage controller is used. The controllable rectifier utilises changeable DC voltage level for the single-phase controlled PWM inverter. The PWM inverter carries out the DC/AC transformation and the fine adjustment of the output voltage. The harmonics contents of the inverter output current are reduced by an LC lowpass filter. The output voltage signal is perfect sinusoidal, because the PWM waveform is generated by a high performance, high accuracy 32-bit floating-point DSP.
{"title":"High precision AC/AC power supply unit based on DSP controlled PWM inverter","authors":"T. Ádám, I. Ajtonyi, F. Toth","doi":"10.1109/PCC.2002.998137","DOIUrl":"https://doi.org/10.1109/PCC.2002.998137","url":null,"abstract":"The paper introduces a precision switching mode AC/AC power supply unit, that has been developed for calibration of current transformers. The device is fed by the 220 V 50/60 Hz mains, the output power is 3 kVA, and the output frequency is 50 or 60 Hz, which can be selected from the program. Large current control ratio, low level harmonic content of the output current, high accuracy, high resolution, high precision are the most important demands. Data transfer interface between the device and a supervisory computer is also necessary. Due to the large control ratio a two-stage controller is used. The controllable rectifier utilises changeable DC voltage level for the single-phase controlled PWM inverter. The PWM inverter carries out the DC/AC transformation and the fine adjustment of the output voltage. The harmonics contents of the inverter output current are reduced by an LC lowpass filter. The output voltage signal is perfect sinusoidal, because the PWM waveform is generated by a high performance, high accuracy 32-bit floating-point DSP.","PeriodicalId":320424,"journal":{"name":"Proceedings of the Power Conversion Conference-Osaka 2002 (Cat. No.02TH8579)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126881847","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}
A high power factor rectifier circuit using a higher switching frequency generally has an LC filter installed at the AC side in order to eliminate the switching ripple. The method to determine the optimum values of L and C are not established yet. We presented an optimum LC filter for a single-phase boost type rectifier with a single switching device. This paper deals with a design method for the LC filter in a three-phase boost type rectifier widely used. The following characteristics are estimated by changing LC parameters; a total harmonic distortion of an input current, a phase lag of the input current, a harmonic content factor near a switching frequency and a ripple factor of a filter capacitor voltage. The appropriate values of the LC filter are determined.
{"title":"Characteristics of three-phase boost type rectifier with LC filter in AC side","authors":"S. Ando, A. Ueda, A. Torii","doi":"10.1109/PCC.2002.998145","DOIUrl":"https://doi.org/10.1109/PCC.2002.998145","url":null,"abstract":"A high power factor rectifier circuit using a higher switching frequency generally has an LC filter installed at the AC side in order to eliminate the switching ripple. The method to determine the optimum values of L and C are not established yet. We presented an optimum LC filter for a single-phase boost type rectifier with a single switching device. This paper deals with a design method for the LC filter in a three-phase boost type rectifier widely used. The following characteristics are estimated by changing LC parameters; a total harmonic distortion of an input current, a phase lag of the input current, a harmonic content factor near a switching frequency and a ripple factor of a filter capacitor voltage. The appropriate values of the LC filter are determined.","PeriodicalId":320424,"journal":{"name":"Proceedings of the Power Conversion Conference-Osaka 2002 (Cat. No.02TH8579)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123108314","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}
The paper contains a detailed small signal analysis of a dual channel resonant DC-DC step down converter. The effect of three variables on the output voltage was investigated, resulting in transfer functions. The frequency range of the converter model obtained was confirmed by computer simulations.
{"title":"Small-signal analysis of a dual channel resonant DC-DC buck converter","authors":"J. Hamar, I. Nagy, I. Denes, B. Buti, E. Masada","doi":"10.1109/PCC.2002.997608","DOIUrl":"https://doi.org/10.1109/PCC.2002.997608","url":null,"abstract":"The paper contains a detailed small signal analysis of a dual channel resonant DC-DC step down converter. The effect of three variables on the output voltage was investigated, resulting in transfer functions. The frequency range of the converter model obtained was confirmed by computer simulations.","PeriodicalId":320424,"journal":{"name":"Proceedings of the Power Conversion Conference-Osaka 2002 (Cat. No.02TH8579)","volume":"113 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122307531","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}
In this paper a novel sensorless speed control of a synchronous reluctance motor (Syn.RM) is presented. The sensorless control is based on the modified flux linkage observer which is proposed by the authors for a permanent magnet synchronous motor (PMSM), and the theory is applied to Syn.RM here. The observer is able to estimate the modified flux linkage and the electromotive force (EMF) simultaneously. The motor speed and the rotor position are calculated from these estimated values. The validity of the proposed method is verified by experiment using the RTLinux.
{"title":"Sensorless speed control of synchronous reluctance motor using RTLinux","authors":"T. Hanamoto, H. Ikeda, T. Tsuji, Y. Tanaka","doi":"10.1109/PCC.2002.997604","DOIUrl":"https://doi.org/10.1109/PCC.2002.997604","url":null,"abstract":"In this paper a novel sensorless speed control of a synchronous reluctance motor (Syn.RM) is presented. The sensorless control is based on the modified flux linkage observer which is proposed by the authors for a permanent magnet synchronous motor (PMSM), and the theory is applied to Syn.RM here. The observer is able to estimate the modified flux linkage and the electromotive force (EMF) simultaneously. The motor speed and the rotor position are calculated from these estimated values. The validity of the proposed method is verified by experiment using the RTLinux.","PeriodicalId":320424,"journal":{"name":"Proceedings of the Power Conversion Conference-Osaka 2002 (Cat. No.02TH8579)","volume":"379 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115950068","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}
With the advancement of high-frequency switching devices, electromagnetic interference (EMI) has become a problem in power electronic converter designs. It is necessary to consider electromagnetic compatibility (EMC) design and possible EMI levels. This paper describes how to compute magnetic fields from converter EMI currents for a converter design. Firstly, modeling techniques for converter circuit components are discussed for a wide band frequency model by the parameter tuning method. Then a derived model is simulated for harmonic distributions of a loop current and its magnetic field. Examples including resonant type converters are discussed.
{"title":"Modeling and simulation of a power electronic converter for EMC","authors":"T. Kato, Y. Otomo, K. Harada, Y. Ishihara","doi":"10.1109/PCC.2002.997574","DOIUrl":"https://doi.org/10.1109/PCC.2002.997574","url":null,"abstract":"With the advancement of high-frequency switching devices, electromagnetic interference (EMI) has become a problem in power electronic converter designs. It is necessary to consider electromagnetic compatibility (EMC) design and possible EMI levels. This paper describes how to compute magnetic fields from converter EMI currents for a converter design. Firstly, modeling techniques for converter circuit components are discussed for a wide band frequency model by the parameter tuning method. Then a derived model is simulated for harmonic distributions of a loop current and its magnetic field. Examples including resonant type converters are discussed.","PeriodicalId":320424,"journal":{"name":"Proceedings of the Power Conversion Conference-Osaka 2002 (Cat. No.02TH8579)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116658464","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}
This paper proposes a new boost power factor preregulator (PFP) featuring zero-current-switching (ZCS). By employing an improved ZCS PWM switch cell, ZCS of all the active switches is achieved without additional current stress of the main switch. The additional conduction loss is reduced, since the circulating current for the soft switching flows only through the auxiliary circuit and a minimum number of switching devices are involved in the circulating current path. The diodes commutate softly and reverse recovery problems are alleviated. The voltage stress of the rectifier diode is reduced compared to the previous ZCS approaches. Design guidelines are described and verified by experimental results from the 1.2 kW prototype boost PFP.
{"title":"Power factor pre-regulator (PFP) with an improved zero-current-switching (ZCS) PWM switch cell","authors":"Hang-Seok Choi, B. Cho","doi":"10.1109/PCC.2002.998506","DOIUrl":"https://doi.org/10.1109/PCC.2002.998506","url":null,"abstract":"This paper proposes a new boost power factor preregulator (PFP) featuring zero-current-switching (ZCS). By employing an improved ZCS PWM switch cell, ZCS of all the active switches is achieved without additional current stress of the main switch. The additional conduction loss is reduced, since the circulating current for the soft switching flows only through the auxiliary circuit and a minimum number of switching devices are involved in the circulating current path. The diodes commutate softly and reverse recovery problems are alleviated. The voltage stress of the rectifier diode is reduced compared to the previous ZCS approaches. Design guidelines are described and verified by experimental results from the 1.2 kW prototype boost PFP.","PeriodicalId":320424,"journal":{"name":"Proceedings of the Power Conversion Conference-Osaka 2002 (Cat. No.02TH8579)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116680986","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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