Pub Date : 2003-11-17DOI: 10.1109/PEDS.2003.1283179
B. Hredzak, G. Guo, J. Zhang
Unbalance caused by uneven distribution of mass on rotational part of the hard disk drive (HDD) induces significant vibrations that can result in disk slippage, wear of the spindle motor bearing and vibration of the HDD assembly. This paper describes design and evaluation of soft balancing machine that can be used for the measurement of the unbalance of HDD or any other rotating machine. Designed balancing machine is subsequently used to achieve near perfect unbalance correction of the hard disk drive test set-up. Mass with a known weight is then added on the rotational part of the balanced HDD in order to introduce known unbalance. Next, position error signal (PES) is measured and used to evaluate the effect of known unbalance on repeatable runout (RRO) and nonrepeatable runout (NRRO). From the measurement of the position error signal it was found that the unbalance has negligible effect on nonrepeatable runout but has significant effect on the first harmonic of the repeatable runout.
{"title":"Investigation of the effect of hard disk drive unbalance on repeatable and nonrepeatable runout","authors":"B. Hredzak, G. Guo, J. Zhang","doi":"10.1109/PEDS.2003.1283179","DOIUrl":"https://doi.org/10.1109/PEDS.2003.1283179","url":null,"abstract":"Unbalance caused by uneven distribution of mass on rotational part of the hard disk drive (HDD) induces significant vibrations that can result in disk slippage, wear of the spindle motor bearing and vibration of the HDD assembly. This paper describes design and evaluation of soft balancing machine that can be used for the measurement of the unbalance of HDD or any other rotating machine. Designed balancing machine is subsequently used to achieve near perfect unbalance correction of the hard disk drive test set-up. Mass with a known weight is then added on the rotational part of the balanced HDD in order to introduce known unbalance. Next, position error signal (PES) is measured and used to evaluate the effect of known unbalance on repeatable runout (RRO) and nonrepeatable runout (NRRO). From the measurement of the position error signal it was found that the unbalance has negligible effect on nonrepeatable runout but has significant effect on the first harmonic of the repeatable runout.","PeriodicalId":106054,"journal":{"name":"The Fifth International Conference on Power Electronics and Drive Systems, 2003. PEDS 2003.","volume":"6 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":"131206829","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.2003.1283083
Liu Hao, Xiao Xiangning, Xu Yonghai
This paper, in accordance with the deficiency that the space vector PWM is complicated in calculation and difficult in engineering application, conducts detailed analyses of the classical solution algorithm for it, and proposes a simplified algorithm based on this. This algorithm simplifies the solution of the space vector PWM to the least degree; it can judge which sector the reference space vector V/sub r/ is located in very conveniently, and, based on this, find the solutions of the space vector PWM algorithm very easily.
{"title":"Study on the simplified algorithm of space vector PWM","authors":"Liu Hao, Xiao Xiangning, Xu Yonghai","doi":"10.1109/PEDS.2003.1283083","DOIUrl":"https://doi.org/10.1109/PEDS.2003.1283083","url":null,"abstract":"This paper, in accordance with the deficiency that the space vector PWM is complicated in calculation and difficult in engineering application, conducts detailed analyses of the classical solution algorithm for it, and proposes a simplified algorithm based on this. This algorithm simplifies the solution of the space vector PWM to the least degree; it can judge which sector the reference space vector V/sub r/ is located in very conveniently, and, based on this, find the solutions of the space vector PWM algorithm very easily.","PeriodicalId":106054,"journal":{"name":"The Fifth International Conference on Power Electronics and Drive Systems, 2003. PEDS 2003.","volume":"49 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":"127015347","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.2003.1283182
B. Lin, Tsung-Yu Yang, Yung-Chuan Lee
This paper presents a three-phase multilevel rectifier with reduced power switches to achieve high power factor, low harmonics and high voltage capability. In the conventional three-phase neutral point clamped rectifiers, twelve power switches are used to draw the sinusoidal line currents with unity power factor. The mains drawback of these systems is the large number of power switches used in the circuits. Only six power switches with voltage rating of half DC-link are adopted in the proposed multilevel rectifier. Based on the proposed control strategy, the input power factor is close to unity and line currents are controlled to be balanced and sinusoidal. Simulation results are provided to verify the effectiveness of the proposed control strategy.
{"title":"Three-phase high power factor rectifier with unidirectional power flow","authors":"B. Lin, Tsung-Yu Yang, Yung-Chuan Lee","doi":"10.1109/PEDS.2003.1283182","DOIUrl":"https://doi.org/10.1109/PEDS.2003.1283182","url":null,"abstract":"This paper presents a three-phase multilevel rectifier with reduced power switches to achieve high power factor, low harmonics and high voltage capability. In the conventional three-phase neutral point clamped rectifiers, twelve power switches are used to draw the sinusoidal line currents with unity power factor. The mains drawback of these systems is the large number of power switches used in the circuits. Only six power switches with voltage rating of half DC-link are adopted in the proposed multilevel rectifier. Based on the proposed control strategy, the input power factor is close to unity and line currents are controlled to be balanced and sinusoidal. Simulation results are provided to verify the effectiveness of the proposed control strategy.","PeriodicalId":106054,"journal":{"name":"The Fifth International Conference on Power Electronics and Drive Systems, 2003. PEDS 2003.","volume":"9 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":"132538125","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}
V/sup 2/ control technique of switching power converter is presented and analyzed in this paper. The small signal model and open-loop small signal transfer function of the V/sup 2/ controlled switching power converters have been studied. The input voltage susceptibility and output impedance of the V/sup 2/ controlled boost converter and buck converter were performed by using MATLAB.
{"title":"Modeling and simulation of V/sup 2/ controlled switching converters","authors":"Fengyan Wang, Songrong Wu, Jianping Xu, Junfeng Xu","doi":"10.1109/PEDS.2003.1282923","DOIUrl":"https://doi.org/10.1109/PEDS.2003.1282923","url":null,"abstract":"V/sup 2/ control technique of switching power converter is presented and analyzed in this paper. The small signal model and open-loop small signal transfer function of the V/sup 2/ controlled switching power converters have been studied. The input voltage susceptibility and output impedance of the V/sup 2/ controlled boost converter and buck converter were performed by using MATLAB.","PeriodicalId":106054,"journal":{"name":"The Fifth International Conference on Power Electronics and Drive Systems, 2003. PEDS 2003.","volume":"83 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":"133471710","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.2003.1282891
T. Wolbank, J. Machl, P. Macheiner, H. Hauser
The lamination material used in inverter-fed ac machines shows some non ideal effects like magnetic saturation, hysteresis losses, eddy currents, and anisotropy. This presentation focuses on the effect of magnetic anisotropy which can show up in inverter fed operation and may deteriorate the performance if not considered. The manufacturing process with rolling and punching as well as the demand to reduce the sheet thickness in order to keep losses low support the emergence of an anisotropic distribution of the crystalline energy. Though the anisotropy is smaller than in grain oriented lamination material used in transformers it is still detectable as shown by measurements made on specimen discs. In the behavior of inverter fed ac machines this effect is seen in the transient current slope as shown by measurements performed on an especially manufactured induction machine. In the fundamental wave behavior anisotropy can hardly be detected. As modern drive control methods are mostly based on fundamental wave models it has not been considered up to now. However, in the past years first methods have been proposed to exploit also the high frequency and transient electrical behavior of induction machines, especially in the fields of mechanically sensorless control as well as condition monitoring. The influence of the anisotropy effect on the transient current slope is shown by measurement results obtained from rotor laminations manually stacked in order to enlarge as well as to diminish the anisotropy. The separation of the resulting signal from possible rotor eccentricity is done using additional measurement coils in the machine.
{"title":"Extraction and elimination of induction machines inherent asymmetry by lamination material anisotropy","authors":"T. Wolbank, J. Machl, P. Macheiner, H. Hauser","doi":"10.1109/PEDS.2003.1282891","DOIUrl":"https://doi.org/10.1109/PEDS.2003.1282891","url":null,"abstract":"The lamination material used in inverter-fed ac machines shows some non ideal effects like magnetic saturation, hysteresis losses, eddy currents, and anisotropy. This presentation focuses on the effect of magnetic anisotropy which can show up in inverter fed operation and may deteriorate the performance if not considered. The manufacturing process with rolling and punching as well as the demand to reduce the sheet thickness in order to keep losses low support the emergence of an anisotropic distribution of the crystalline energy. Though the anisotropy is smaller than in grain oriented lamination material used in transformers it is still detectable as shown by measurements made on specimen discs. In the behavior of inverter fed ac machines this effect is seen in the transient current slope as shown by measurements performed on an especially manufactured induction machine. In the fundamental wave behavior anisotropy can hardly be detected. As modern drive control methods are mostly based on fundamental wave models it has not been considered up to now. However, in the past years first methods have been proposed to exploit also the high frequency and transient electrical behavior of induction machines, especially in the fields of mechanically sensorless control as well as condition monitoring. The influence of the anisotropy effect on the transient current slope is shown by measurement results obtained from rotor laminations manually stacked in order to enlarge as well as to diminish the anisotropy. The separation of the resulting signal from possible rotor eccentricity is done using additional measurement coils in the machine.","PeriodicalId":106054,"journal":{"name":"The Fifth International Conference on Power Electronics and Drive Systems, 2003. PEDS 2003.","volume":"8 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":"133935612","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.2003.1283246
N. Dai, M. Wong, Ying-duo Han
In the past researches, strategies based on hysteresis control are proposed for controlling trilevel 3-leg center-split inverter, which can be used as a shunt power quality compensator for three-phase four-wire system. In this paper, results indicate that the complicated 3-dimensional (3D) space vector allocation of the trilevel center-split inverter can be simplified into six space vector regions of two-level center-split inverter. Thus, based on the 3D space vector modulation (3DSVM) control strategy for two-level center-split inverter, the novel 3DSVM control strategy for trilevel 3-leg center-split inverter is proposed. Different from the conventional 2-dimensional space vector modulation (2DSVM), the zero-axis component should be of a major concern in this novel 3DSVM since 3D space vectors are located in different horizontal planes and each vector contributes to zero-axis compensation. When the zero-axis component is considered, the neutral current of the three-phase four-wire system can be compensated simultaneously with three-phase current harmonics. Simulation results are given to show the validity of the proposed control strategy.
{"title":"Controlling trilevel center-split power quality compensator by 3-dimensional space vector modulation","authors":"N. Dai, M. Wong, Ying-duo Han","doi":"10.1109/PEDS.2003.1283246","DOIUrl":"https://doi.org/10.1109/PEDS.2003.1283246","url":null,"abstract":"In the past researches, strategies based on hysteresis control are proposed for controlling trilevel 3-leg center-split inverter, which can be used as a shunt power quality compensator for three-phase four-wire system. In this paper, results indicate that the complicated 3-dimensional (3D) space vector allocation of the trilevel center-split inverter can be simplified into six space vector regions of two-level center-split inverter. Thus, based on the 3D space vector modulation (3DSVM) control strategy for two-level center-split inverter, the novel 3DSVM control strategy for trilevel 3-leg center-split inverter is proposed. Different from the conventional 2-dimensional space vector modulation (2DSVM), the zero-axis component should be of a major concern in this novel 3DSVM since 3D space vectors are located in different horizontal planes and each vector contributes to zero-axis compensation. When the zero-axis component is considered, the neutral current of the three-phase four-wire system can be compensated simultaneously with three-phase current harmonics. Simulation results are given to show the validity of the proposed control strategy.","PeriodicalId":106054,"journal":{"name":"The Fifth International Conference on Power Electronics and Drive Systems, 2003. PEDS 2003.","volume":"94 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":"134375829","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.2003.1282996
T. Senjyu, N. Sueyoshi, K. Uezato, H. Fujita, T. Funabashi
Transient stability assessment of wind power generator is one of main issues in power system security and operation. The transient stability for the wind power generator is determined by its corresponding critical clearing time (CCT). Conventionally, determination of the induction generator CCT involves a large number of trial and error methods that requires repetitive runs of related time domain simulation. In this paper, we present transient stability analysis technique for induction generator used in wind power generating system at three-phase fault conditions. The proposed method saves time in consuming the repetitive runs of related time domain simulation. The validity of the developed technique is confirmed by the results obtained from trial and error method using Matlab/Simulink.
{"title":"Transient stability analysis of induction generator using torque-time characteristic","authors":"T. Senjyu, N. Sueyoshi, K. Uezato, H. Fujita, T. Funabashi","doi":"10.1109/PEDS.2003.1282996","DOIUrl":"https://doi.org/10.1109/PEDS.2003.1282996","url":null,"abstract":"Transient stability assessment of wind power generator is one of main issues in power system security and operation. The transient stability for the wind power generator is determined by its corresponding critical clearing time (CCT). Conventionally, determination of the induction generator CCT involves a large number of trial and error methods that requires repetitive runs of related time domain simulation. In this paper, we present transient stability analysis technique for induction generator used in wind power generating system at three-phase fault conditions. The proposed method saves time in consuming the repetitive runs of related time domain simulation. The validity of the developed technique is confirmed by the results obtained from trial and error method using Matlab/Simulink.","PeriodicalId":106054,"journal":{"name":"The Fifth International Conference on Power Electronics and Drive Systems, 2003. PEDS 2003.","volume":"39 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":"130351515","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.2003.1283170
Sheng-Yuan Ou, Shang-Chin Yen, Yu-Kang Lo
The input current harmonic analysis using discrete waveform modeling for discontinuous conduction mode boost rectifiers is presented in this paper. The equations describing the input current waveforms and the current harmonics can be expressed as functions of the circuit parameters, including the duty ratio, switching frequency, input inductance and the load resistance. The procedures for estimating the input filter capacitance are also established. Experimental results show good conformation with the theoretical data.
{"title":"Input current harmonic analysis and filter capacitor design for discontinuous conduction mode boost rectifiers","authors":"Sheng-Yuan Ou, Shang-Chin Yen, Yu-Kang Lo","doi":"10.1109/PEDS.2003.1283170","DOIUrl":"https://doi.org/10.1109/PEDS.2003.1283170","url":null,"abstract":"The input current harmonic analysis using discrete waveform modeling for discontinuous conduction mode boost rectifiers is presented in this paper. The equations describing the input current waveforms and the current harmonics can be expressed as functions of the circuit parameters, including the duty ratio, switching frequency, input inductance and the load resistance. The procedures for estimating the input filter capacitance are also established. Experimental results show good conformation with the theoretical data.","PeriodicalId":106054,"journal":{"name":"The Fifth International Conference on Power Electronics and Drive Systems, 2003. PEDS 2003.","volume":"21 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":"124486950","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.2003.1283200
A. Moki, Shoji
A rectifier system having a DC voltage step-up and step-down characteristic is treated. The system consists of a PWM voltage source rectifier and a DC-to-DC buck converter connected in cascade. Theoretically, the system can produce a DC output voltage ranging from zero volts to infinity and a sinusoidal AC input current, and the displacement power factor can be kept at unity. The system can perform bidirectional power flow. Control strategy based on a sinusoidal internal model is proposed. Two PS regulators and two PI regulators for each control object is used. Experimental results confirm the validity of the proposed control system.
{"title":"Sinusoidal internal model based control of a three-phase voltage source rectifier with buck-boost operation","authors":"A. Moki, Shoji","doi":"10.1109/PEDS.2003.1283200","DOIUrl":"https://doi.org/10.1109/PEDS.2003.1283200","url":null,"abstract":"A rectifier system having a DC voltage step-up and step-down characteristic is treated. The system consists of a PWM voltage source rectifier and a DC-to-DC buck converter connected in cascade. Theoretically, the system can produce a DC output voltage ranging from zero volts to infinity and a sinusoidal AC input current, and the displacement power factor can be kept at unity. The system can perform bidirectional power flow. Control strategy based on a sinusoidal internal model is proposed. Two PS regulators and two PI regulators for each control object is used. Experimental results confirm the validity of the proposed control system.","PeriodicalId":106054,"journal":{"name":"The Fifth International Conference on Power Electronics and Drive Systems, 2003. PEDS 2003.","volume":"57 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":"124849729","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.2003.1283235
C. Zhang, K. Tseng, J. Zhou
A motor proposed in this paper has a disk-type rotor sandwiched between two disk-type stators and has the capability of both rotation and levitation control. The displacement and rotation along radial directions and axial direction are restricted and controlled by passive bearings and active magnetic bearings respectively. It does not rely on mechanical bearing, so does not require lubrication and can be expected to have longer maintenance-free lifespan. The collective system design, mathematical model, control scheme and simulation results are presented in this paper.
{"title":"Modeling and simulation of a disk-type permanent magnet bearingless motor","authors":"C. Zhang, K. Tseng, J. Zhou","doi":"10.1109/PEDS.2003.1283235","DOIUrl":"https://doi.org/10.1109/PEDS.2003.1283235","url":null,"abstract":"A motor proposed in this paper has a disk-type rotor sandwiched between two disk-type stators and has the capability of both rotation and levitation control. The displacement and rotation along radial directions and axial direction are restricted and controlled by passive bearings and active magnetic bearings respectively. It does not rely on mechanical bearing, so does not require lubrication and can be expected to have longer maintenance-free lifespan. The collective system design, mathematical model, control scheme and simulation results are presented in this paper.","PeriodicalId":106054,"journal":{"name":"The Fifth International Conference on Power Electronics and Drive Systems, 2003. PEDS 2003.","volume":"41 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":"124950630","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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