Pub Date : 2018-08-01DOI: 10.1109/EPEPEMC.2018.8521957
Lilla Litvani, J. Hamar
This paper introduces a new five level resonant DC/DC converter and examines its operation in steady-state symmetrical conditions in discontinous current conduction mode. The converter has four outputs, which can provide four equivalent voltage levels or four different ones as well. It has several advantages such as improved performance at high efficiency and lower EMI. By using this converter, zero voltage and zero current switching is possible which helps reducing the swtiching losses. The most important relations among the input, output, and control variables will be derived and verified by simulation results. Three control variables will be examined in the paper, switching angle $alpha_{p}[{}^{circ}]$, capacitor peak voltage $V_{c}^{*}[pu]$ and switching frequency $f_{s}^{*}$ [pu]. Parameters $V_{c}^{*}$ and $alpha_{p}$ are dependent variables, while $f_{s}$ is independent of them. This converter can be applied in UPS systems or in multi-level inverter drives as well.
{"title":"New Five Level Resonant DC/DC Buck Converter","authors":"Lilla Litvani, J. Hamar","doi":"10.1109/EPEPEMC.2018.8521957","DOIUrl":"https://doi.org/10.1109/EPEPEMC.2018.8521957","url":null,"abstract":"This paper introduces a new five level resonant DC/DC converter and examines its operation in steady-state symmetrical conditions in discontinous current conduction mode. The converter has four outputs, which can provide four equivalent voltage levels or four different ones as well. It has several advantages such as improved performance at high efficiency and lower EMI. By using this converter, zero voltage and zero current switching is possible which helps reducing the swtiching losses. The most important relations among the input, output, and control variables will be derived and verified by simulation results. Three control variables will be examined in the paper, switching angle $alpha_{p}[{}^{circ}]$, capacitor peak voltage $V_{c}^{*}[pu]$ and switching frequency $f_{s}^{*}$ [pu]. Parameters $V_{c}^{*}$ and $alpha_{p}$ are dependent variables, while $f_{s}$ is independent of them. This converter can be applied in UPS systems or in multi-level inverter drives as well.","PeriodicalId":251046,"journal":{"name":"2018 IEEE 18th International Power Electronics and Motion Control Conference (PEMC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129520253","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 : 2018-08-01DOI: 10.1109/EPEPEMC.2018.8521953
E. Kabalci
The single-phase photovoltaic (PV) systems are being widely researched due to several environmental and financial advantages. The PV converters are implemented either in single stage of two-stage topologies according to intermediate dc bus requirements. In the two-stage topologies, the recent researches are based on transformerless structures to eliminate bulky and lossy transformer isolation. Therefore, several methods including stray current grounding have been proposed in the literature to obtain isolation without the use of transformer. This paper proposes a two-stage PV converter with quasi Z-source (qZS) inverter in the second stage. The first stage of PV converter is comprised by a conventional boost converter that the maximum power point tracking (MPPT) controller is improved with integral regulator addition to incremental conductance algorithm. The MPPT efficiency of improved system is measured as 98.8% regarding to the designed controller. In addition to its efficiency, MPPT controller stabilized the intermediate dc bus voltage against the various irradiation values applied to PV plant. The qZS network is designed to ensure continuous conduction mode (CCM) operation considering shoot-through and non-shoot-through states. The switching control of H-bridge inverter is realized by the designed grid tracking controller that samples grid voltage as a reference input and decomposes to detect phase, frequency, and amplitude values. The power factor of inverter output is measured at 0.988 and total harmonic distortion (THD) ratios of current and voltage waveforms are at 1.71 %.
{"title":"The Design and Analysis of a Two-Stage PV Converter with Quasi-Z Source Inverter","authors":"E. Kabalci","doi":"10.1109/EPEPEMC.2018.8521953","DOIUrl":"https://doi.org/10.1109/EPEPEMC.2018.8521953","url":null,"abstract":"The single-phase photovoltaic (PV) systems are being widely researched due to several environmental and financial advantages. The PV converters are implemented either in single stage of two-stage topologies according to intermediate dc bus requirements. In the two-stage topologies, the recent researches are based on transformerless structures to eliminate bulky and lossy transformer isolation. Therefore, several methods including stray current grounding have been proposed in the literature to obtain isolation without the use of transformer. This paper proposes a two-stage PV converter with quasi Z-source (qZS) inverter in the second stage. The first stage of PV converter is comprised by a conventional boost converter that the maximum power point tracking (MPPT) controller is improved with integral regulator addition to incremental conductance algorithm. The MPPT efficiency of improved system is measured as 98.8% regarding to the designed controller. In addition to its efficiency, MPPT controller stabilized the intermediate dc bus voltage against the various irradiation values applied to PV plant. The qZS network is designed to ensure continuous conduction mode (CCM) operation considering shoot-through and non-shoot-through states. The switching control of H-bridge inverter is realized by the designed grid tracking controller that samples grid voltage as a reference input and decomposes to detect phase, frequency, and amplitude values. The power factor of inverter output is measured at 0.988 and total harmonic distortion (THD) ratios of current and voltage waveforms are at 1.71 %.","PeriodicalId":251046,"journal":{"name":"2018 IEEE 18th International Power Electronics and Motion Control Conference (PEMC)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129807564","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 : 2018-08-01DOI: 10.1109/EPEPEMC.2018.8521939
T. Kokenyesi, Márton Hegedűs, Szabolcs Veréb, A. Balogh, Z. Suto, I. Varjasi
The advances in FPGA technology have enabled to develop fast HIL (Hardware-in-the-Loop) simulators, revolutionizing control software and hardware development for power electronics. HIL simulators should reproduce the same analogue signals that could be measured on real main circuits. A very common limitation in these applications is the usable pin count of the FPGA, therefore using the most pin-effective Digital-to-Analogue Converters (DACs) becomes critical. $Sigma-Delta$ DACs provide a simple, FPGA-synthesizable solution using a single pin for each output, but the output signal's bandwidth and latency is usually not sufficient, because of the required analogue filters. Higher order $Sigma-Delta$ DACs usually perform much better in the aspect of the Signal-to-Noise-Ratio (SNR) but not the usable bandwidth. This paper introduces a new bitstream DAC architecture based on the sliding mode control of the output analogue filter model. It is optimized mainly to reproduce current transducer signals in power electronics (usually triangle waves), which can be done more accurately than traditional $Sigma-Delta$ solutions.
{"title":"FPGA-Driven DAC with Second Order Sliding Mode Control of Filter Model for Hardware-In-the-Loop Simulators","authors":"T. Kokenyesi, Márton Hegedűs, Szabolcs Veréb, A. Balogh, Z. Suto, I. Varjasi","doi":"10.1109/EPEPEMC.2018.8521939","DOIUrl":"https://doi.org/10.1109/EPEPEMC.2018.8521939","url":null,"abstract":"The advances in FPGA technology have enabled to develop fast HIL (Hardware-in-the-Loop) simulators, revolutionizing control software and hardware development for power electronics. HIL simulators should reproduce the same analogue signals that could be measured on real main circuits. A very common limitation in these applications is the usable pin count of the FPGA, therefore using the most pin-effective Digital-to-Analogue Converters (DACs) becomes critical. $Sigma-Delta$ DACs provide a simple, FPGA-synthesizable solution using a single pin for each output, but the output signal's bandwidth and latency is usually not sufficient, because of the required analogue filters. Higher order $Sigma-Delta$ DACs usually perform much better in the aspect of the Signal-to-Noise-Ratio (SNR) but not the usable bandwidth. This paper introduces a new bitstream DAC architecture based on the sliding mode control of the output analogue filter model. It is optimized mainly to reproduce current transducer signals in power electronics (usually triangle waves), which can be done more accurately than traditional $Sigma-Delta$ solutions.","PeriodicalId":251046,"journal":{"name":"2018 IEEE 18th International Power Electronics and Motion Control Conference (PEMC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128929702","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 : 2018-08-01DOI: 10.1109/EPEPEMC.2018.8521879
Y. Sato, Hikaru Nagata, M. Uno
Recent power systems, such as photovoltaic systems including solar panels and batteries, contain multiple power sources. These systems tend to be complex and costly because multiple converters in proportion to the number of power sources are required to regulate each power source individually. Various types of nonisolated multi-port converters (MPCs) have been reported to achieve simplified systems at lower costs. Most conventional nonisolated MPCs, however, employ multiple inductors, resulting in increased circuit volume. In this paper, a novel nonisolated single-magnetic MPC integrating a PWM converter and dual active bridge converter is proposed. The integration reduces the number of switches and magnetic components, realizing the reduced circuit volume and simplified topology. The detailed analysis was performed, followed by the experimental verification using a 200-W prototype. The experimental results demonstrated that the proposed MPC could regulate two output ports individually by PWM and phase-shift controls.
{"title":"Nonisolated Single-Magnetic Multi-Port Converter Based on Integration of PWM Converter and Dual Active Bridge Converter","authors":"Y. Sato, Hikaru Nagata, M. Uno","doi":"10.1109/EPEPEMC.2018.8521879","DOIUrl":"https://doi.org/10.1109/EPEPEMC.2018.8521879","url":null,"abstract":"Recent power systems, such as photovoltaic systems including solar panels and batteries, contain multiple power sources. These systems tend to be complex and costly because multiple converters in proportion to the number of power sources are required to regulate each power source individually. Various types of nonisolated multi-port converters (MPCs) have been reported to achieve simplified systems at lower costs. Most conventional nonisolated MPCs, however, employ multiple inductors, resulting in increased circuit volume. In this paper, a novel nonisolated single-magnetic MPC integrating a PWM converter and dual active bridge converter is proposed. The integration reduces the number of switches and magnetic components, realizing the reduced circuit volume and simplified topology. The detailed analysis was performed, followed by the experimental verification using a 200-W prototype. The experimental results demonstrated that the proposed MPC could regulate two output ports individually by PWM and phase-shift controls.","PeriodicalId":251046,"journal":{"name":"2018 IEEE 18th International Power Electronics and Motion Control Conference (PEMC)","volume":"35 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120993055","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 : 2018-08-01DOI: 10.1109/EPEPEMC.2018.8521908
Chan-Ki Kim, Chanz-Hwan Park, Janz-Mok Kim
This paper deals with a level selection algorithm with fixed sampling frequency for Modular Multilevel Converter(MMC) system. Theoretically, the proposed method increases the level infinitely while the sampling time remains the same. The proposed method called Cluster Stream Buffer(CSB) consists of several cluster where each cluster is composed of 32 (or 17) submodules. For an increase in the level of the MMC system, additional clusters are used and the sampling time between clusters is determined from the sampling time between levels needed for utilizing the entire level from the MMC system. This method plays a vital role in the control of MMC type HVDC system by improving its scalability and precision.
{"title":"Level Selection Algorithm with Fixed Sampling Frequency for Modular Multilevel Converter","authors":"Chan-Ki Kim, Chanz-Hwan Park, Janz-Mok Kim","doi":"10.1109/EPEPEMC.2018.8521908","DOIUrl":"https://doi.org/10.1109/EPEPEMC.2018.8521908","url":null,"abstract":"This paper deals with a level selection algorithm with fixed sampling frequency for Modular Multilevel Converter(MMC) system. Theoretically, the proposed method increases the level infinitely while the sampling time remains the same. The proposed method called Cluster Stream Buffer(CSB) consists of several cluster where each cluster is composed of 32 (or 17) submodules. For an increase in the level of the MMC system, additional clusters are used and the sampling time between clusters is determined from the sampling time between levels needed for utilizing the entire level from the MMC system. This method plays a vital role in the control of MMC type HVDC system by improving its scalability and precision.","PeriodicalId":251046,"journal":{"name":"2018 IEEE 18th International Power Electronics and Motion Control Conference (PEMC)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121419329","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 : 2018-08-01DOI: 10.1109/EPEPEMC.2018.8521927
Sakhraoui Imane, T. Baptiste, Rotella Frédéric
High integrated power electronic modules are designed with the emergence of new semi-conductor technologies. The increase of reliability of power modules induces the precise knowledge of the local temperature, even if it can not be measured at any location. In this paper, the application of an observer in the discrete time framework is proposed. It allows to estimate the temperature at any location using measurements provided from thermal sensors located at a few precise points. The aim is to design a reduced size observer that could be implemented on a real-time embedded target such as Digital Signal Processor. Consequently, this works pays attention on the design procedure and the computation complexity of the resulting observer.
{"title":"Discrete Linear Functional Observer for the Thermal Estimation in Power Modules","authors":"Sakhraoui Imane, T. Baptiste, Rotella Frédéric","doi":"10.1109/EPEPEMC.2018.8521927","DOIUrl":"https://doi.org/10.1109/EPEPEMC.2018.8521927","url":null,"abstract":"High integrated power electronic modules are designed with the emergence of new semi-conductor technologies. The increase of reliability of power modules induces the precise knowledge of the local temperature, even if it can not be measured at any location. In this paper, the application of an observer in the discrete time framework is proposed. It allows to estimate the temperature at any location using measurements provided from thermal sensors located at a few precise points. The aim is to design a reduced size observer that could be implemented on a real-time embedded target such as Digital Signal Processor. Consequently, this works pays attention on the design procedure and the computation complexity of the resulting observer.","PeriodicalId":251046,"journal":{"name":"2018 IEEE 18th International Power Electronics and Motion Control Conference (PEMC)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121521213","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 : 2018-08-01DOI: 10.1109/EPEPEMC.2018.8521933
Jing Yang, Peng-cheng Li, Zhongxiao Cong, Yang Song, Shuai Lu
The instant islanding of a microgrid with the minimal voltage sag requires the instant outage detection, grid disconnection and switching of the inverters operating modes. This paper deals with the inverter (AC/DC) supplied by the DC/DC converter connecting the energy storage devices. The P/Q and V/F controls are used in the grid-tied and the islanding modes, respectively. The seamless islanding transition can be achieved if the DC/DC regulates the dc-link voltage for both modes. However, the stability requirements of the battery charging and discharging currents are not satisfied in this scenario. The paper introduces the low order harmonic (LOH) powers distribution mechanism in between different stages in the system, so that the LOH powers due to the non-sinusoidal grid voltages will not pass through to the battery side. The proposed adjusting mechanism are verified by the simulation. The experiment on a battery storage system (AC/DC and DC/DC) prototype is being carried out within a microgrid and the partial lab results are shown.
{"title":"Adjusting the Low Order Harmonics in the Battery Currents for the Microgrid Power Converters with the Instant Islanding Capabilities","authors":"Jing Yang, Peng-cheng Li, Zhongxiao Cong, Yang Song, Shuai Lu","doi":"10.1109/EPEPEMC.2018.8521933","DOIUrl":"https://doi.org/10.1109/EPEPEMC.2018.8521933","url":null,"abstract":"The instant islanding of a microgrid with the minimal voltage sag requires the instant outage detection, grid disconnection and switching of the inverters operating modes. This paper deals with the inverter (AC/DC) supplied by the DC/DC converter connecting the energy storage devices. The P/Q and V/F controls are used in the grid-tied and the islanding modes, respectively. The seamless islanding transition can be achieved if the DC/DC regulates the dc-link voltage for both modes. However, the stability requirements of the battery charging and discharging currents are not satisfied in this scenario. The paper introduces the low order harmonic (LOH) powers distribution mechanism in between different stages in the system, so that the LOH powers due to the non-sinusoidal grid voltages will not pass through to the battery side. The proposed adjusting mechanism are verified by the simulation. The experiment on a battery storage system (AC/DC and DC/DC) prototype is being carried out within a microgrid and the partial lab results are shown.","PeriodicalId":251046,"journal":{"name":"2018 IEEE 18th International Power Electronics and Motion Control Conference (PEMC)","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115749544","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 : 2018-08-01DOI: 10.1109/EPEPEMC.2018.8521936
M. Gwóźdź, M. Krystkowiak, Łukasz Ciepliński
In the work the 3-phase power diode rectifier system with a quasi-sinusoidal input (power grid) current is presented. In order to benefit from it the current modulator in a DC circuit of rectifier is used. The advantage of the system is, that power of the current modulator is equal to only a few percent of the system total output power. The essential part of the modulator is the wide-band power electronics controlled current source (VCCS) based on a multi-channel converter. The control algorithm of the current modulator respects impact of aliasing phenomena at system's stability by using the method proposed by authors. The paper contains overall description of the rectifier operation as well as a structure and rules of operation of the current modulator. Also, selected results of research of the system simulation model are presented.
{"title":"3-Phase Diode Rectifier with Current Modulation in DC Circuit","authors":"M. Gwóźdź, M. Krystkowiak, Łukasz Ciepliński","doi":"10.1109/EPEPEMC.2018.8521936","DOIUrl":"https://doi.org/10.1109/EPEPEMC.2018.8521936","url":null,"abstract":"In the work the 3-phase power diode rectifier system with a quasi-sinusoidal input (power grid) current is presented. In order to benefit from it the current modulator in a DC circuit of rectifier is used. The advantage of the system is, that power of the current modulator is equal to only a few percent of the system total output power. The essential part of the modulator is the wide-band power electronics controlled current source (VCCS) based on a multi-channel converter. The control algorithm of the current modulator respects impact of aliasing phenomena at system's stability by using the method proposed by authors. The paper contains overall description of the rectifier operation as well as a structure and rules of operation of the current modulator. Also, selected results of research of the system simulation model are presented.","PeriodicalId":251046,"journal":{"name":"2018 IEEE 18th International Power Electronics and Motion Control Conference (PEMC)","volume":"1046 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131694318","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 : 2018-08-01DOI: 10.1109/EPEPEMC.2018.8521987
Pratibha Naganathan, S. Srinivas
A novel Maximum Torque Per Ampere (MTPA) based Direct Torque Control (DTC) scheme is proposed in this paper, for a two-level inverter fed Induction Motor (IM) drive, suited for Electric Vehicle (EV) applications. In the EV applications, reference torque is slowly varied, which opens up the option to control the flux reference in order to incorporate MTPA condition, facilitating improvement in IM efficiency. Firstly, flux reference changes needed to realize MTPA condition are derived in synchronous reference frame and then appropriately translated to the stationary reference frame so as to be adopted for DTC for controlling both torque and flux in the IM. With this relation, an MTPA controller is designed along with a feedback-linearizing controller. The performance of the IM with the proposed MTPA based DTC is tested initially for smooth varying torque reference and results are presented that clearly demonstrates a much lower current drawn from the inverter drive when compared with the use of conventional DTC scheme. This may lead to improved energy savings. To ascertain the benefits obtainable with the envisaged MTPA based DTC scheme for EV applications, the motor drive is tested and experimental results are presented with the European Union (EU) urban drive cycle data.
{"title":"Maximum Torque Per Ampere Based Direct Torque Control Scheme of IM Drive for Electrical Vehicle Applications","authors":"Pratibha Naganathan, S. Srinivas","doi":"10.1109/EPEPEMC.2018.8521987","DOIUrl":"https://doi.org/10.1109/EPEPEMC.2018.8521987","url":null,"abstract":"A novel Maximum Torque Per Ampere (MTPA) based Direct Torque Control (DTC) scheme is proposed in this paper, for a two-level inverter fed Induction Motor (IM) drive, suited for Electric Vehicle (EV) applications. In the EV applications, reference torque is slowly varied, which opens up the option to control the flux reference in order to incorporate MTPA condition, facilitating improvement in IM efficiency. Firstly, flux reference changes needed to realize MTPA condition are derived in synchronous reference frame and then appropriately translated to the stationary reference frame so as to be adopted for DTC for controlling both torque and flux in the IM. With this relation, an MTPA controller is designed along with a feedback-linearizing controller. The performance of the IM with the proposed MTPA based DTC is tested initially for smooth varying torque reference and results are presented that clearly demonstrates a much lower current drawn from the inverter drive when compared with the use of conventional DTC scheme. This may lead to improved energy savings. To ascertain the benefits obtainable with the envisaged MTPA based DTC scheme for EV applications, the motor drive is tested and experimental results are presented with the European Union (EU) urban drive cycle data.","PeriodicalId":251046,"journal":{"name":"2018 IEEE 18th International Power Electronics and Motion Control Conference (PEMC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131753347","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 : 2018-08-01DOI: 10.1109/EPEPEMC.2018.8522004
Tohid Asefi, J. Faiz, M. A. Khan
This paper discusses dual rotor axial flux machines with surface mounted and spoke type ferrite permanent magnets (PMs) with concentrated windings; they are introduced as alternatives to a generator with surface mounted Nd-Fe-B magnets which is analyzed in [10]. The output power, voltage, speed and air gap clearance for all the generators are identical. The machine designs are optimized for minimum mass using a population-based algorithm, assuming the same efficiency as the Nd-Fe-B machine. A finite element analysis (FEA) is applied to predict the performance, electromotive force, developed torque, cogging torque, no load losses, leakage flux and efficiency of both ferrite generators and that of the Nd-Fe-B generator. To minimize cogging torque, different rotor pole topologies and different pole arc to pole pitch ratios are investigated by means of 3D FEA. It was found that the surface mounted Ferrite generator topology is unable to develop the nominal electromagnetic torque, and has higher torque ripple and is heavier than the spoke type machine. Furthermore, it was shown that the spoke type Ferrite PM generator has favorable performance and could be an alternative to rare-earth PM generators, particularly in wind energy applications. Finally, the analytical and numerical results are verified using experimental results.
{"title":"Design of Dual Rotor Axial Flux Permanent Magnet Generators with Ferrite and Rare-Earth Magnets","authors":"Tohid Asefi, J. Faiz, M. A. Khan","doi":"10.1109/EPEPEMC.2018.8522004","DOIUrl":"https://doi.org/10.1109/EPEPEMC.2018.8522004","url":null,"abstract":"This paper discusses dual rotor axial flux machines with surface mounted and spoke type ferrite permanent magnets (PMs) with concentrated windings; they are introduced as alternatives to a generator with surface mounted Nd-Fe-B magnets which is analyzed in [10]. The output power, voltage, speed and air gap clearance for all the generators are identical. The machine designs are optimized for minimum mass using a population-based algorithm, assuming the same efficiency as the Nd-Fe-B machine. A finite element analysis (FEA) is applied to predict the performance, electromotive force, developed torque, cogging torque, no load losses, leakage flux and efficiency of both ferrite generators and that of the Nd-Fe-B generator. To minimize cogging torque, different rotor pole topologies and different pole arc to pole pitch ratios are investigated by means of 3D FEA. It was found that the surface mounted Ferrite generator topology is unable to develop the nominal electromagnetic torque, and has higher torque ripple and is heavier than the spoke type machine. Furthermore, it was shown that the spoke type Ferrite PM generator has favorable performance and could be an alternative to rare-earth PM generators, particularly in wind energy applications. Finally, the analytical and numerical results are verified using experimental results.","PeriodicalId":251046,"journal":{"name":"2018 IEEE 18th International Power Electronics and Motion Control Conference (PEMC)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128444092","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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