Pub Date : 2023-07-01DOI: 10.1541/ieejjia.22007826
Kanta Horikoshi, Kantaro Yoshimoto, Tomoki Yokoyama
Maximum adhesive force control has been developed to restrict the adhesive force to its maximum value by utilizing the adhesive coefficient between the wheel and rail, which peaks at a specific slip ratio when the drive wheel slips. To estimate the slip speed at the peak adhesive force value, the vehicle and wheel speeds are required. In this study, maximum adhesive force control was proposed, which involves estimating the vehicle speed using the LPF of the driving-wheel speed instead of the vehicle speed. Simulation results indicate that the torque was successfully controlled to drive at the maximum adhesive force. In addition, the proposed control method was validated using a wheel-rail test bench.
{"title":"Novel Maximum Adhesive Force Control Without Vehicle Speed Sensor","authors":"Kanta Horikoshi, Kantaro Yoshimoto, Tomoki Yokoyama","doi":"10.1541/ieejjia.22007826","DOIUrl":"https://doi.org/10.1541/ieejjia.22007826","url":null,"abstract":"Maximum adhesive force control has been developed to restrict the adhesive force to its maximum value by utilizing the adhesive coefficient between the wheel and rail, which peaks at a specific slip ratio when the drive wheel slips. To estimate the slip speed at the peak adhesive force value, the vehicle and wheel speeds are required. In this study, maximum adhesive force control was proposed, which involves estimating the vehicle speed using the LPF of the driving-wheel speed instead of the vehicle speed. Simulation results indicate that the torque was successfully controlled to drive at the maximum adhesive force. In addition, the proposed control method was validated using a wheel-rail test bench.","PeriodicalId":45552,"journal":{"name":"IEEJ Journal of Industry Applications","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135110520","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 : 2023-07-01DOI: 10.1541/ieejjia.22007800
Takuji Mitsui, Yoshitaka Iwaji
This paper describes a novel method for current detection in sensorless control using high-frequency voltage injection. The proposed method adopts a low-pass filter to prevent ringing. Generally, reactive current cannot be detected using a DC filter; however the proposed method permits detection via voltage injection. High responsiveness and a simple construction have been achieved using the method. Simulation results indicate that active and reactive currents can be reconstructed using a single shunt current; the experimental results indicate that the proposed method can be applied to a motor drive without lowering the performance, unlike when using a current sensor.
{"title":"Motor Current Reconstruction Method Using Single Shunt Resistance by High-Frequency Voltage Injection","authors":"Takuji Mitsui, Yoshitaka Iwaji","doi":"10.1541/ieejjia.22007800","DOIUrl":"https://doi.org/10.1541/ieejjia.22007800","url":null,"abstract":"This paper describes a novel method for current detection in sensorless control using high-frequency voltage injection. The proposed method adopts a low-pass filter to prevent ringing. Generally, reactive current cannot be detected using a DC filter; however the proposed method permits detection via voltage injection. High responsiveness and a simple construction have been achieved using the method. Simulation results indicate that active and reactive currents can be reconstructed using a single shunt current; the experimental results indicate that the proposed method can be applied to a motor drive without lowering the performance, unlike when using a current sensor.","PeriodicalId":45552,"journal":{"name":"IEEJ Journal of Industry Applications","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136311075","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 : 2023-07-01DOI: 10.1541/ieejjia.22007253
Yuma Tsujii, Shigeo Morimoto, Yukinori Inoue, Masayuki Sanada
This study investigates the effect of an inductance model on the sensorless control performance of a synchronous reluctance motor (SynRM). A high-frequency voltage injection method based on the position dependence of the inductance and an extended electromotive force estimation method based on the motor model are applied to achieve sensorless control. More specifically, the inductances are modeled in several patterns and applied to the two methods. Subsequently, the characteristics in the steady and transient states are compared. Moreover, the effect of the inductance model on the sensorless control performance of a SynRM with magnetic saturation is investigated by comparing the characteristics in the full-speed region under the combination of the two methods.
{"title":"Effect of Inductance Model on Sensorless Control Performance of SynRM with Magnetic Saturation","authors":"Yuma Tsujii, Shigeo Morimoto, Yukinori Inoue, Masayuki Sanada","doi":"10.1541/ieejjia.22007253","DOIUrl":"https://doi.org/10.1541/ieejjia.22007253","url":null,"abstract":"This study investigates the effect of an inductance model on the sensorless control performance of a synchronous reluctance motor (SynRM). A high-frequency voltage injection method based on the position dependence of the inductance and an extended electromotive force estimation method based on the motor model are applied to achieve sensorless control. More specifically, the inductances are modeled in several patterns and applied to the two methods. Subsequently, the characteristics in the steady and transient states are compared. Moreover, the effect of the inductance model on the sensorless control performance of a SynRM with magnetic saturation is investigated by comparing the characteristics in the full-speed region under the combination of the two methods.","PeriodicalId":45552,"journal":{"name":"IEEJ Journal of Industry Applications","volume":"290 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136311081","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 : 2023-07-01DOI: 10.1541/ieejjia.22007270
Mohd. Brado Frasetyo, Fransisco Danang Wijaya, Husni Rois Ali
Indonesia is an archipelagic country with many remote islands. Supplying electricity is difficult in some remote islands in Indonesia, such as Adaut regency of west Maluku. One solution to solve this electricity supply problem is the creation of a microgrid system. However, the application of renewable energy on microgrids can lead to several technical challenges, such as frequency disturbances and voltage instability. Therefore, a control algorithm that can maintain the system stability is required. One recently developed algorithm is the synchronverter. In this study, the synchronverter is used to maintain network stability on an islanded wind farm based microgrid. As a result, we asses the microgrid stability responses with the synchronverter algorithm or a conventional synchronous generator to evaluate the microgrid stability performance. The outcomes of this study indicate that the synchronverter algorithm can maintain the stability of microgrid even it is interrupted by intermittent wind speed input and load changes.
{"title":"Islanded Wind Farm Microgrid Stability Control using Synchronverter Algorithm","authors":"Mohd. Brado Frasetyo, Fransisco Danang Wijaya, Husni Rois Ali","doi":"10.1541/ieejjia.22007270","DOIUrl":"https://doi.org/10.1541/ieejjia.22007270","url":null,"abstract":"Indonesia is an archipelagic country with many remote islands. Supplying electricity is difficult in some remote islands in Indonesia, such as Adaut regency of west Maluku. One solution to solve this electricity supply problem is the creation of a microgrid system. However, the application of renewable energy on microgrids can lead to several technical challenges, such as frequency disturbances and voltage instability. Therefore, a control algorithm that can maintain the system stability is required. One recently developed algorithm is the synchronverter. In this study, the synchronverter is used to maintain network stability on an islanded wind farm based microgrid. As a result, we asses the microgrid stability responses with the synchronverter algorithm or a conventional synchronous generator to evaluate the microgrid stability performance. The outcomes of this study indicate that the synchronverter algorithm can maintain the stability of microgrid even it is interrupted by intermittent wind speed input and load changes.","PeriodicalId":45552,"journal":{"name":"IEEJ Journal of Industry Applications","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135011310","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, we propose a novel method to improve the circuit simulation accuracy of insulated-gate bipolar transistor (IGBT) power devices under a short-circuit state. To determine the IGBT junction temperature, the transient thermal resistance of an IGBT device on the order of micro seconds is estimated by transient thermal simulations. The saturation current without self-heating effects is estimated based on a short-circuit test and the transient thermal resistance. The IGBT SPICE parameter is extracted from the saturation current characteristics during the short-circuit state. The coupled electrical-thermal simulations with the SPICE model and thermal resistance model are applied to several short-circuit evaluations with different parasitic impedance and gate driving condition, and the results are consistent with the measured current and voltage waveforms.
{"title":"Circuit Simulation Method for Insulated-Gate Bipolar Transistor Short-Circuit Operation with High Accuracy","authors":"Takaya Ozawa, Takao Yamamoto, Hiroto Sugiura, Yosuke Kondo","doi":"10.1541/ieejjia.21009050","DOIUrl":"https://doi.org/10.1541/ieejjia.21009050","url":null,"abstract":"In this paper, we propose a novel method to improve the circuit simulation accuracy of insulated-gate bipolar transistor (IGBT) power devices under a short-circuit state. To determine the IGBT junction temperature, the transient thermal resistance of an IGBT device on the order of micro seconds is estimated by transient thermal simulations. The saturation current without self-heating effects is estimated based on a short-circuit test and the transient thermal resistance. The IGBT SPICE parameter is extracted from the saturation current characteristics during the short-circuit state. The coupled electrical-thermal simulations with the SPICE model and thermal resistance model are applied to several short-circuit evaluations with different parasitic impedance and gate driving condition, and the results are consistent with the measured current and voltage waveforms.","PeriodicalId":45552,"journal":{"name":"IEEJ Journal of Industry Applications","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135011316","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}
Joint gap measurement is an important inspection to prevent buckling of railways. However, this measurement is labor intensive and time consuming because the tracks are too long for manual inspections. Therefore, we have developed a rail joint gap measurement method using train frontal images recorded by a handy video camcorder. In this paper, we describe details pertaining to the proposed method and discuss the measurement results obtained based on an experiment involving a commercial train.
{"title":"Rail Joint Gap Measurement Method using Train Frontal Images Captured by a Handy Video Camcorder","authors":"Wataru Goda, Kensuke Itoi, Nozomi Nagamine, Yosuke Tsubokawa","doi":"10.1541/ieejjia.22006132","DOIUrl":"https://doi.org/10.1541/ieejjia.22006132","url":null,"abstract":"Joint gap measurement is an important inspection to prevent buckling of railways. However, this measurement is labor intensive and time consuming because the tracks are too long for manual inspections. Therefore, we have developed a rail joint gap measurement method using train frontal images recorded by a handy video camcorder. In this paper, we describe details pertaining to the proposed method and discuss the measurement results obtained based on an experiment involving a commercial train.","PeriodicalId":45552,"journal":{"name":"IEEJ Journal of Industry Applications","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135110519","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 : 2023-07-01DOI: 10.1541/ieejjia.22008991
Kan Yang, Kan Akatsu, Kodai Okazaki, Yoshihiro Miyama
Permanent magnet synchronous machines (PMSMs) are widely used in a variety of applications. The static eccentricity of the rotor is a common fault in the fabrication process. These faults cause imbalanced electromagnetic force and exert unexpected vibration and acoustic noise during the design process. In the worst case, it causes bearing or motor failure. This research investigates the impact of this fault on the temporal and spatial harmonic distribution of gap flux density and electromagnetic force. Moreover, a compensation method has been proposed to suppress imbalanced force due to static eccentricity by using a triple three-phase winding motor. By controlling the three inverters independently, the winding current of each group can be controlled. Therefore, the gap flux density and electromagnetic force in each group can be brought into a desired state. Therefore, the imbalanced electromagnetic force can be restored using this system. In this paper, the effectiveness of the proposed method is verified by Finite Element Analysis (FEA) and experiment.
{"title":"Imbalanced Force Suppression Due to Static Eccentricity by using Triple Three-phase Winding Motor","authors":"Kan Yang, Kan Akatsu, Kodai Okazaki, Yoshihiro Miyama","doi":"10.1541/ieejjia.22008991","DOIUrl":"https://doi.org/10.1541/ieejjia.22008991","url":null,"abstract":"Permanent magnet synchronous machines (PMSMs) are widely used in a variety of applications. The static eccentricity of the rotor is a common fault in the fabrication process. These faults cause imbalanced electromagnetic force and exert unexpected vibration and acoustic noise during the design process. In the worst case, it causes bearing or motor failure. This research investigates the impact of this fault on the temporal and spatial harmonic distribution of gap flux density and electromagnetic force. Moreover, a compensation method has been proposed to suppress imbalanced force due to static eccentricity by using a triple three-phase winding motor. By controlling the three inverters independently, the winding current of each group can be controlled. Therefore, the gap flux density and electromagnetic force in each group can be brought into a desired state. Therefore, the imbalanced electromagnetic force can be restored using this system. In this paper, the effectiveness of the proposed method is verified by Finite Element Analysis (FEA) and experiment.","PeriodicalId":45552,"journal":{"name":"IEEJ Journal of Industry Applications","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135011309","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}
{"title":"IEEJ Journal of Industry Applications","authors":"","doi":"10.1541/ieejjia.12.l4_1","DOIUrl":"https://doi.org/10.1541/ieejjia.12.l4_1","url":null,"abstract":"","PeriodicalId":45552,"journal":{"name":"IEEJ Journal of Industry Applications","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135264784","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 : 2023-07-01DOI: 10.1541/ieejjia.22007335
Georg Tobias Götz, Philipp Tillmann, Anne von Hoegen, Rik W. De Doncker
In mobile applications such as eletric vehicles, weight and installation space are the primary limiting factors that affect the system efficiency and consequently the driving range. Reusing the machine windings of an electrical machine as inductors, e. g. in DC-DC converters for onboard chargers, saves weight and space. However, currents in the machine windings when operating as DC-DC converter can result in undesired torque ripple generated by the machine. Therefore, stable rotor positions of a switched reluctance machine have to be found to prevent it from rotating in DC-DC converter operation mode. In this study, stable rotor positions for a wide range of current distributions are determined, enabling flexibility in the choice of currents. A method to analyze such stable equilibrium positions for switched reluctance motors is presented. The proposed method is used to determine the stable positions that facilitate flexible current distribution between phases. Moreover, locus curves are calculated, simulated, and measured to illustrate and evaluate stable rotor positions for the various current distributions.
{"title":"Stable Equilibrium Rotor Positions for Three-Phase Switched Reluctance Machine","authors":"Georg Tobias Götz, Philipp Tillmann, Anne von Hoegen, Rik W. De Doncker","doi":"10.1541/ieejjia.22007335","DOIUrl":"https://doi.org/10.1541/ieejjia.22007335","url":null,"abstract":"In mobile applications such as eletric vehicles, weight and installation space are the primary limiting factors that affect the system efficiency and consequently the driving range. Reusing the machine windings of an electrical machine as inductors, e. g. in DC-DC converters for onboard chargers, saves weight and space. However, currents in the machine windings when operating as DC-DC converter can result in undesired torque ripple generated by the machine. Therefore, stable rotor positions of a switched reluctance machine have to be found to prevent it from rotating in DC-DC converter operation mode. In this study, stable rotor positions for a wide range of current distributions are determined, enabling flexibility in the choice of currents. A method to analyze such stable equilibrium positions for switched reluctance motors is presented. The proposed method is used to determine the stable positions that facilitate flexible current distribution between phases. Moreover, locus curves are calculated, simulated, and measured to illustrate and evaluate stable rotor positions for the various current distributions.","PeriodicalId":45552,"journal":{"name":"IEEJ Journal of Industry Applications","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136011566","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 : 2023-05-01DOI: 10.1541/ieejjia.22007875
Jin Kawasaki, Keita Saito, Hiroki Kawano, Yuki Shimizu, Yoshitaka Otaki
The SUSTIE test facility was completed in 2020, and it facilitates to the development of energy-conservation technologies while contributing to the realization of more comfortable and energy-efficient indoor environments. The facility achieved the top rank of energy performance certification “Building-Housing Energy-efficiency Labeling System (BELS)” and wellness-office certification “Comprehensive Assessment System for Built Environment Efficiency-Wellness Office (CASBEE-WO)” in Japan. To accelerate research and evaluation, we propose an efficient Internet-of-things (IoT) platform called the SUSTIE Core Engine. The platform gathers data in real time, stores both design data and time-series data with coordinates, and act as simulation interface to satisfy three requirements of an IoT platform for smart facilities: an architecture that allows adding / removing functions without stopping operation, data management features for time-series / coordinates data, and common interface for simulations / controls. We implement the platform which covers the requirements to on-site system in the test facility, and evaluate the gateway, spatiotemporal database, and simulation interface. Our platform showed that it satisfies the three functional requirements of IoT platforms. Furthermore, it was shown that the database can obtain sufficient demonstrated for practical use.
{"title":"SUSTIE Core Engine: Efficient IoT Platform for Smart Facility Solutions with Gateway, Spatiotemporal Database, and Simulation Interface","authors":"Jin Kawasaki, Keita Saito, Hiroki Kawano, Yuki Shimizu, Yoshitaka Otaki","doi":"10.1541/ieejjia.22007875","DOIUrl":"https://doi.org/10.1541/ieejjia.22007875","url":null,"abstract":"The SUSTIE test facility was completed in 2020, and it facilitates to the development of energy-conservation technologies while contributing to the realization of more comfortable and energy-efficient indoor environments. The facility achieved the top rank of energy performance certification “Building-Housing Energy-efficiency Labeling System (BELS)” and wellness-office certification “Comprehensive Assessment System for Built Environment Efficiency-Wellness Office (CASBEE-WO)” in Japan. To accelerate research and evaluation, we propose an efficient Internet-of-things (IoT) platform called the SUSTIE Core Engine. The platform gathers data in real time, stores both design data and time-series data with coordinates, and act as simulation interface to satisfy three requirements of an IoT platform for smart facilities: an architecture that allows adding / removing functions without stopping operation, data management features for time-series / coordinates data, and common interface for simulations / controls. We implement the platform which covers the requirements to on-site system in the test facility, and evaluate the gateway, spatiotemporal database, and simulation interface. Our platform showed that it satisfies the three functional requirements of IoT platforms. Furthermore, it was shown that the database can obtain sufficient demonstrated for practical use.","PeriodicalId":45552,"journal":{"name":"IEEJ Journal of Industry Applications","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135801780","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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