Pub Date : 2019-02-01DOI: 10.1109/PEDSTC.2019.8697773
M. Amirian, M. Ardebili
This paper presents the influence of different physical parameters on flux reversal machines (FRM) characteristics. Sensitivity analysis have been done on different rotor and stator parameters and finally an optimization procedure and 2D finite element method(FEM) have been employed to accomplish and verify the suitable values for the chosen parameters based on the objective function. The optimized machine have a better characteristic especially in term of average torque and have lower demagnetization in the magnets.
{"title":"Impact of Stator and Rotor Teeth Parameters on Operation and Characteristics of Flux Reversal machine","authors":"M. Amirian, M. Ardebili","doi":"10.1109/PEDSTC.2019.8697773","DOIUrl":"https://doi.org/10.1109/PEDSTC.2019.8697773","url":null,"abstract":"This paper presents the influence of different physical parameters on flux reversal machines (FRM) characteristics. Sensitivity analysis have been done on different rotor and stator parameters and finally an optimization procedure and 2D finite element method(FEM) have been employed to accomplish and verify the suitable values for the chosen parameters based on the objective function. The optimized machine have a better characteristic especially in term of average torque and have lower demagnetization in the magnets.","PeriodicalId":296229,"journal":{"name":"2019 10th International Power Electronics, Drive Systems and Technologies Conference (PEDSTC)","volume":"100 5-6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120915866","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 : 2019-02-01DOI: 10.1109/PEDSTC.2019.8697748
S. Hemmati, Seyed Saeid
This paper proposes a new method to find winding function for damper bars. The damper bars in a salient pole synchronous machine (SPSM) are shorted together and dissimilar currents can obviously flow in each of the shorted bars and the winding function technique seems to be unable in solving this problem. However, in this paper it will be shown that the winding function Theory can still be used. Using this winding function for the damper bars, machine inductances are computed. To demonstrate the correctness of the proposed method, the Finite Element Method (FEM) simulation has been employed.
{"title":"A New Method to Model Damper Windings in the Salient Pole Synchronous Machine","authors":"S. Hemmati, Seyed Saeid","doi":"10.1109/PEDSTC.2019.8697748","DOIUrl":"https://doi.org/10.1109/PEDSTC.2019.8697748","url":null,"abstract":"This paper proposes a new method to find winding function for damper bars. The damper bars in a salient pole synchronous machine (SPSM) are shorted together and dissimilar currents can obviously flow in each of the shorted bars and the winding function technique seems to be unable in solving this problem. However, in this paper it will be shown that the winding function Theory can still be used. Using this winding function for the damper bars, machine inductances are computed. To demonstrate the correctness of the proposed method, the Finite Element Method (FEM) simulation has been employed.","PeriodicalId":296229,"journal":{"name":"2019 10th International Power Electronics, Drive Systems and Technologies Conference (PEDSTC)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116694173","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 : 2019-02-01DOI: 10.1109/PEDSTC.2019.8697636
Mohammad Meisam Roohi Sankestani, A. Siadatan
In this paper, the electric and magnetic design of four models of outer rotor synchronous reluctance motor with the same number of slot in stator and different number of pole investigated. After design of 4 motor the parameters of the motors compared to select the most suitable. The desired parameters are some electrical and magnetic outputs like flux density, torque, output power. For calculation above mentioned, the transient finite element method has been used. Finally, optimization of selected motor investigated using Taguchi method.
{"title":"Design of outer rotor synchronous reluctance motor for scooter application","authors":"Mohammad Meisam Roohi Sankestani, A. Siadatan","doi":"10.1109/PEDSTC.2019.8697636","DOIUrl":"https://doi.org/10.1109/PEDSTC.2019.8697636","url":null,"abstract":"In this paper, the electric and magnetic design of four models of outer rotor synchronous reluctance motor with the same number of slot in stator and different number of pole investigated. After design of 4 motor the parameters of the motors compared to select the most suitable. The desired parameters are some electrical and magnetic outputs like flux density, torque, output power. For calculation above mentioned, the transient finite element method has been used. Finally, optimization of selected motor investigated using Taguchi method.","PeriodicalId":296229,"journal":{"name":"2019 10th International Power Electronics, Drive Systems and Technologies Conference (PEDSTC)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121293422","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 : 2019-02-01DOI: 10.1109/PEDSTC.2019.8697258
H. Ghorbani, B. Majidi
Recent developments in electrical machine industries have made investigators to explore new topologies of electrical machines including Synchronous Reluctance Machine (SyncRM). However, Permanent Magnet Assisted Synchronous Reluctance Machine (PMSyncRM or PMASyncRM) which is originated from SyncRM and PMs are inserted in flux barriers of rotor is also introduced for improving the magnetic performance of SyncRM. Thus, the amount, magnetic direction and material of PM segments should be optimized based on the operational requirement. In order to enhance power density of the machine, 2D Finite Element Method (FEM) is applied to six PM layouts considering three different types of PM materials in two magnetic directions and results are presented in this paper. Based on the results PM-SyncRM with two NdFeB PMs per pole aligned with flux direction in rotor shows the overall enhancement in power (torque) density and torque ripple reduction.
{"title":"Power Density Optimization Through Optimal Selection of PM properties in a PM-SyncRM Using FEM Analysis","authors":"H. Ghorbani, B. Majidi","doi":"10.1109/PEDSTC.2019.8697258","DOIUrl":"https://doi.org/10.1109/PEDSTC.2019.8697258","url":null,"abstract":"Recent developments in electrical machine industries have made investigators to explore new topologies of electrical machines including Synchronous Reluctance Machine (SyncRM). However, Permanent Magnet Assisted Synchronous Reluctance Machine (PMSyncRM or PMASyncRM) which is originated from SyncRM and PMs are inserted in flux barriers of rotor is also introduced for improving the magnetic performance of SyncRM. Thus, the amount, magnetic direction and material of PM segments should be optimized based on the operational requirement. In order to enhance power density of the machine, 2D Finite Element Method (FEM) is applied to six PM layouts considering three different types of PM materials in two magnetic directions and results are presented in this paper. Based on the results PM-SyncRM with two NdFeB PMs per pole aligned with flux direction in rotor shows the overall enhancement in power (torque) density and torque ripple reduction.","PeriodicalId":296229,"journal":{"name":"2019 10th International Power Electronics, Drive Systems and Technologies Conference (PEDSTC)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126030587","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 : 2019-02-01DOI: 10.1109/PEDSTC.2019.8697586
A. M. Ajamloo, Aghil Ghaheri, E. Afjei
Brushless DC (BLDC) motors are well-known as a type of motors with high power to weight ratio and high efficiency. These characteristics enable BLDC motors to be used in propulsion application. The propulsion systems require light weight, high power motors with Low operational noise and cogging torque, which signifies the need of multi objective optimization of the motor in this application. In this paper, the design process of BLDC motors is explained and a BLDC motor is proposed. Then the motor is optimized based on Taguchi design of experiments to achieve a lightweight, high power density and low noise motor. The process is also studied with Analysis of Variance (ANOVA). To validate the optimization results, the final motor is simulated with the Finite Element Method (FEM) and compared to the initial design.
{"title":"Multi-objective Optimization of an Outer Rotor BLDC Motor Based on Taguchi Method for Propulsion Applications","authors":"A. M. Ajamloo, Aghil Ghaheri, E. Afjei","doi":"10.1109/PEDSTC.2019.8697586","DOIUrl":"https://doi.org/10.1109/PEDSTC.2019.8697586","url":null,"abstract":"Brushless DC (BLDC) motors are well-known as a type of motors with high power to weight ratio and high efficiency. These characteristics enable BLDC motors to be used in propulsion application. The propulsion systems require light weight, high power motors with Low operational noise and cogging torque, which signifies the need of multi objective optimization of the motor in this application. In this paper, the design process of BLDC motors is explained and a BLDC motor is proposed. Then the motor is optimized based on Taguchi design of experiments to achieve a lightweight, high power density and low noise motor. The process is also studied with Analysis of Variance (ANOVA). To validate the optimization results, the final motor is simulated with the Finite Element Method (FEM) and compared to the initial design.","PeriodicalId":296229,"journal":{"name":"2019 10th International Power Electronics, Drive Systems and Technologies Conference (PEDSTC)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133986217","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 : 2019-02-01DOI: 10.1109/PEDSTC.2019.8697263
F. Sedaghati, M. E. Azizkandi, Seyed Hadi Latifi Majareh, H. Shayeghi
This paper proposes a new high-efficiency, non-isolated, interleaved DC-DC converter. The suggested structure consists of two interleaved modified step-up KY converters, to obtain a high voltage conversion ratio without the use of coupled inductors. The presented converter has a higher voltage gain than traditional interleaved boost, CUK, buck-boost, ZETA and SEPIC converters, and in suitable duty cycles, a high voltage conversion ratio can be obtained for the converter. Voltage stress of the power switches and diodes is low. Therefore, switches with low on-state resistance and low conduction losses can be used to enhance efficiency. Moreover, with the utilization of interleaving techniques the ripple of input current in the suggested topology is reduced. The steady-state analysis and operating principles of the suggested topology are expressed in this paper. Finally, in order to verify theoretical analysis and performance of the proposed converter, experimental measurement results are presented.
{"title":"A High-Efficiency Non-Isolated High-Gain Interleaved DC-DC Converter with Reduced Voltage Stress on Devices","authors":"F. Sedaghati, M. E. Azizkandi, Seyed Hadi Latifi Majareh, H. Shayeghi","doi":"10.1109/PEDSTC.2019.8697263","DOIUrl":"https://doi.org/10.1109/PEDSTC.2019.8697263","url":null,"abstract":"This paper proposes a new high-efficiency, non-isolated, interleaved DC-DC converter. The suggested structure consists of two interleaved modified step-up KY converters, to obtain a high voltage conversion ratio without the use of coupled inductors. The presented converter has a higher voltage gain than traditional interleaved boost, CUK, buck-boost, ZETA and SEPIC converters, and in suitable duty cycles, a high voltage conversion ratio can be obtained for the converter. Voltage stress of the power switches and diodes is low. Therefore, switches with low on-state resistance and low conduction losses can be used to enhance efficiency. Moreover, with the utilization of interleaving techniques the ripple of input current in the suggested topology is reduced. The steady-state analysis and operating principles of the suggested topology are expressed in this paper. Finally, in order to verify theoretical analysis and performance of the proposed converter, experimental measurement results are presented.","PeriodicalId":296229,"journal":{"name":"2019 10th International Power Electronics, Drive Systems and Technologies Conference (PEDSTC)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134477268","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 : 2019-02-01DOI: 10.1109/PEDSTC.2019.8697261
Farshad Soltanian
Photovoltaic power plants usually work in maximum power point tracking (MPPT) mode to maximize the output power that deliver to the grid. By increasing the number of installed PV plants, new challenges have emerged in the system such as overloading, overvoltages, and operation during voltage disturbances. So the need for increased ancillary services imposes power reserves in the photovoltaic systems. In this paper, a stable algorithm is used to operate in constant power generation (CPG) mode at the right side of the MPP without any instability problems by using I-V characteristic of the PV panel. A 100 KW PV system has been simulated in MATLAB/Simulink and the operation under a fast change in irradiance has been considered.
{"title":"A Stable Power Reserve Control Method in Photovoltaic Systems Using I-V Curve Characteristics","authors":"Farshad Soltanian","doi":"10.1109/PEDSTC.2019.8697261","DOIUrl":"https://doi.org/10.1109/PEDSTC.2019.8697261","url":null,"abstract":"Photovoltaic power plants usually work in maximum power point tracking (MPPT) mode to maximize the output power that deliver to the grid. By increasing the number of installed PV plants, new challenges have emerged in the system such as overloading, overvoltages, and operation during voltage disturbances. So the need for increased ancillary services imposes power reserves in the photovoltaic systems. In this paper, a stable algorithm is used to operate in constant power generation (CPG) mode at the right side of the MPP without any instability problems by using I-V characteristic of the PV panel. A 100 KW PV system has been simulated in MATLAB/Simulink and the operation under a fast change in irradiance has been considered.","PeriodicalId":296229,"journal":{"name":"2019 10th International Power Electronics, Drive Systems and Technologies Conference (PEDSTC)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134286211","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 : 2019-02-01DOI: 10.1109/PEDSTC.2019.8697822
S. Hajmohammadi, R. Alipour-sarabi, Z. Nasiri-Gheidari, F. Tootoonchian
Multi-turn resolvers are consisted of two individual resolvers in one housing. Due to use of both single speed and multi-speed resolvers in one frame, multi-turn resolvers are supposed to provide the benefits of higher accuracy and absolute position measurement, simultaneously. In this paper, after presenting different configurations of wound-rotor (WR), multi-turn resolvers, their design considerations are discussed. Winding function (WF) method is used for finding appropriate slot-pole combinations, and winding configurations. Then time stepping finite element analysis is applied to evaluate the performance of the designed resolvers. Finally, experimental measurements validate the simulation results.
{"title":"Design Considerations of Multi-Turn Wound-Rotor Resolvers*","authors":"S. Hajmohammadi, R. Alipour-sarabi, Z. Nasiri-Gheidari, F. Tootoonchian","doi":"10.1109/PEDSTC.2019.8697822","DOIUrl":"https://doi.org/10.1109/PEDSTC.2019.8697822","url":null,"abstract":"Multi-turn resolvers are consisted of two individual resolvers in one housing. Due to use of both single speed and multi-speed resolvers in one frame, multi-turn resolvers are supposed to provide the benefits of higher accuracy and absolute position measurement, simultaneously. In this paper, after presenting different configurations of wound-rotor (WR), multi-turn resolvers, their design considerations are discussed. Winding function (WF) method is used for finding appropriate slot-pole combinations, and winding configurations. Then time stepping finite element analysis is applied to evaluate the performance of the designed resolvers. Finally, experimental measurements validate the simulation results.","PeriodicalId":296229,"journal":{"name":"2019 10th International Power Electronics, Drive Systems and Technologies Conference (PEDSTC)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132645729","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 : 2019-02-01DOI: 10.1109/PEDSTC.2019.8697749
Amirhosein Malekipour, Sayed Morteza Saghaiannezhad, A. Rashidi
This paper concentrates on vibration reduction of switched reluctance motor while phases are demagnetized by a boosted voltage compared to magnetization voltage. Three different methods are investigated in this paper, first method is the conventional method based on Asymmetrical H-Bridge converter providing fixed voltage in both magnetization and demagnetization instances. Second method is when demagnetization voltage is boosted compared to magnetization voltage but conventional control algorithm is used and it is shown that in this condition, the vibration intensity is too high. Third method uses a control algorithm to impose the boosted demagnetization voltage in a way that reduces vibrartion intensity of stator’s frame. For all three methods firstly an electromagnetic finite element analysis is used to obtain radial forces and these forces are passed through motor’s vibration transfer function and vibration waveforms are obtained. Finally a comparison between vibration response of these three methods is done.
{"title":"A Method for Vibration Alleviation of SRM When Demagnetization Voltage is Boosted","authors":"Amirhosein Malekipour, Sayed Morteza Saghaiannezhad, A. Rashidi","doi":"10.1109/PEDSTC.2019.8697749","DOIUrl":"https://doi.org/10.1109/PEDSTC.2019.8697749","url":null,"abstract":"This paper concentrates on vibration reduction of switched reluctance motor while phases are demagnetized by a boosted voltage compared to magnetization voltage. Three different methods are investigated in this paper, first method is the conventional method based on Asymmetrical H-Bridge converter providing fixed voltage in both magnetization and demagnetization instances. Second method is when demagnetization voltage is boosted compared to magnetization voltage but conventional control algorithm is used and it is shown that in this condition, the vibration intensity is too high. Third method uses a control algorithm to impose the boosted demagnetization voltage in a way that reduces vibrartion intensity of stator’s frame. For all three methods firstly an electromagnetic finite element analysis is used to obtain radial forces and these forces are passed through motor’s vibration transfer function and vibration waveforms are obtained. Finally a comparison between vibration response of these three methods is done.","PeriodicalId":296229,"journal":{"name":"2019 10th International Power Electronics, Drive Systems and Technologies Conference (PEDSTC)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130825056","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 : 2019-02-01DOI: 10.1109/PEDSTC.2019.8697272
M. A. Azghandi, S. Masoud Barakati
This paper proposes a virtual RL damper in series with the passive filter inductor of the grid-connected current-source inverter (CSI)-based photovoltaic (PV) systems. The virtual damper actively applies a supplementary feedback from the inductor current to the pulse-width modulator via a proportional-derivative (PD) controller. The details of the proposed PD controller and its practical design are also presented in this paper. Theoretical analysis and simulation results demonstrate that the proposed control strategy adequately suppresses the current oscillations and mitigates the low-order harmonics.
{"title":"Virtual RL Damping and Harmonic Suppression for Current-Source Inverter-Based Photovoltaic Systems","authors":"M. A. Azghandi, S. Masoud Barakati","doi":"10.1109/PEDSTC.2019.8697272","DOIUrl":"https://doi.org/10.1109/PEDSTC.2019.8697272","url":null,"abstract":"This paper proposes a virtual RL damper in series with the passive filter inductor of the grid-connected current-source inverter (CSI)-based photovoltaic (PV) systems. The virtual damper actively applies a supplementary feedback from the inductor current to the pulse-width modulator via a proportional-derivative (PD) controller. The details of the proposed PD controller and its practical design are also presented in this paper. Theoretical analysis and simulation results demonstrate that the proposed control strategy adequately suppresses the current oscillations and mitigates the low-order harmonics.","PeriodicalId":296229,"journal":{"name":"2019 10th International Power Electronics, Drive Systems and Technologies Conference (PEDSTC)","volume":"151 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116525060","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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