Pub Date : 2016-05-17DOI: 10.1109/APEMC.2016.7522825
Binghao Li, Y. Du
In this paper, a modified FDTD method using a hybrid Cartesian-cylindrical coordinate system is presented for modeling long wires with a axial symmetry structure. The wires are described with FDTD equations in a cylindrical coordinate system, and the non-wire zone in a Cartesian coordinated system. A thin-wire model is employed to link these field equations, and a time-domain solution is available. This modified FDTD method is applied to solve transient electromagnetic fields associated with long wires covered with insulation material. Reasonable result is obtained.
{"title":"A modified FDTD method using a hybrid Cartesian-cylindrical coordinate system","authors":"Binghao Li, Y. Du","doi":"10.1109/APEMC.2016.7522825","DOIUrl":"https://doi.org/10.1109/APEMC.2016.7522825","url":null,"abstract":"In this paper, a modified FDTD method using a hybrid Cartesian-cylindrical coordinate system is presented for modeling long wires with a axial symmetry structure. The wires are described with FDTD equations in a cylindrical coordinate system, and the non-wire zone in a Cartesian coordinated system. A thin-wire model is employed to link these field equations, and a time-domain solution is available. This modified FDTD method is applied to solve transient electromagnetic fields associated with long wires covered with insulation material. Reasonable result is obtained.","PeriodicalId":358257,"journal":{"name":"2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC)","volume":"882 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125629159","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 : 2016-05-17DOI: 10.1109/APEMC.2016.7522733
Li-Ling Zhou, Yan Zhao
It is very important to select a good method for antenna measurement. So this paper will describe the characters of antenna measurement environments. The anechoic chambers (far-field and near-field) can gain the radiation patterns of antennas, and the reverberation chamber can improve the efficiency of antenna measurement. In reverberation chamber, antenna efficiency, total radiation efficiency, diversity gain and the performance of MIMO can be measured. Therefore, the anechoic chambers and the reverberation chambers complement each other perfectly.
{"title":"A review of antenna radiation measurement environment","authors":"Li-Ling Zhou, Yan Zhao","doi":"10.1109/APEMC.2016.7522733","DOIUrl":"https://doi.org/10.1109/APEMC.2016.7522733","url":null,"abstract":"It is very important to select a good method for antenna measurement. So this paper will describe the characters of antenna measurement environments. The anechoic chambers (far-field and near-field) can gain the radiation patterns of antennas, and the reverberation chamber can improve the efficiency of antenna measurement. In reverberation chamber, antenna efficiency, total radiation efficiency, diversity gain and the performance of MIMO can be measured. Therefore, the anechoic chambers and the reverberation chambers complement each other perfectly.","PeriodicalId":358257,"journal":{"name":"2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC)","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125718597","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 : 2016-05-17DOI: 10.1109/APEMC.2016.7522752
D. Bellan, S. Pignari
This paper deals with the analytical investigation of common-mode current generation due to asymmetry in the three-phase load of a motor drive system. Load asymmetry is typically due to parasitic turn-to-turn capacitances included in the high-frequency circuit model of motor coils. It is shown that, in case of load asymmetry, generation of common mode current is due not only to the zero-sequence voltage source, as in the conventional analysis, but a further contribution is given by the space vector components of the voltage source. To this aim, rigorous circuit representation of such contribution is derived.
{"title":"On the common mode current due to circuit asymmetry in three-phase motor drive systems","authors":"D. Bellan, S. Pignari","doi":"10.1109/APEMC.2016.7522752","DOIUrl":"https://doi.org/10.1109/APEMC.2016.7522752","url":null,"abstract":"This paper deals with the analytical investigation of common-mode current generation due to asymmetry in the three-phase load of a motor drive system. Load asymmetry is typically due to parasitic turn-to-turn capacitances included in the high-frequency circuit model of motor coils. It is shown that, in case of load asymmetry, generation of common mode current is due not only to the zero-sequence voltage source, as in the conventional analysis, but a further contribution is given by the space vector components of the voltage source. To this aim, rigorous circuit representation of such contribution is derived.","PeriodicalId":358257,"journal":{"name":"2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115864534","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 : 2016-05-17DOI: 10.1109/APEMC.2016.7522779
Y. S. Cao, L. J. Jiang, A. Ruehli
Graphene is being proposed as a new nano material for EMC shielding and absorption due to its tunable resistive characteristics. The surface conductivity of graphene can be flexibly tuned by the electrostatic and magnetostatic bias applied on the graphene surface. Hence, its absorption and radiation characteristics of graphene are changed accordingly. The static electric bias applied on the graphene patch can change the chemical potential and the surface conductivity of graphene. The static magnetic field can make the conductivity a dispersive and anisotropic tensor, which complicates most modeling methodologies. In this paper, a novel equivalent circuit model is proposed for graphene with the electrostatic and magnetostatic bias, respectively. It employs the equivalent circuit model that is derived from the electric field integral equation to analyze the wave propagation and absorption through graphene. It provides a general modeling approach for graphene's applications as the EMC materials.
{"title":"The equivalent circuit model for electrostatic and magnetostatic biased tunable graphene as the absorption material","authors":"Y. S. Cao, L. J. Jiang, A. Ruehli","doi":"10.1109/APEMC.2016.7522779","DOIUrl":"https://doi.org/10.1109/APEMC.2016.7522779","url":null,"abstract":"Graphene is being proposed as a new nano material for EMC shielding and absorption due to its tunable resistive characteristics. The surface conductivity of graphene can be flexibly tuned by the electrostatic and magnetostatic bias applied on the graphene surface. Hence, its absorption and radiation characteristics of graphene are changed accordingly. The static electric bias applied on the graphene patch can change the chemical potential and the surface conductivity of graphene. The static magnetic field can make the conductivity a dispersive and anisotropic tensor, which complicates most modeling methodologies. In this paper, a novel equivalent circuit model is proposed for graphene with the electrostatic and magnetostatic bias, respectively. It employs the equivalent circuit model that is derived from the electric field integral equation to analyze the wave propagation and absorption through graphene. It provides a general modeling approach for graphene's applications as the EMC materials.","PeriodicalId":358257,"journal":{"name":"2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131964444","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 : 2016-05-17DOI: 10.1109/APEMC.2016.7522972
Ya-Peng Fu, C. Gao, Bo Yang, Bi-hua Zhou
To reduce the electromagnetic radiation, we set a metal layer to surround lightning rod for shielding. Then we use the finite-difference time-domain (FDTD) method to analyze the field distribution laws of this situation. Moreover, we also calculate the corresponding field distribution without metal layer for comparison. It is shown that the metal layer affects the electromagnetic field distribution laws, especially for the vertical electric field Ez above the ground. The field value decrease as the distance from the lightning channel increases and the extent reduces except the Ez above the ground with metal layer exists. No matter the metal layer existing or not, the field distribution laws below the ground are the same. In addition, there exist many differences between electromagnetic fields obtained above and below the ground with metal layer exists, including wave shape and value. The finite conductivity of metal layer and discharge occurring between the rod and the coaxial metal layer should be considered.
{"title":"The effect of metal layer surround the lightning rod on lightning electromagnetic field distribution","authors":"Ya-Peng Fu, C. Gao, Bo Yang, Bi-hua Zhou","doi":"10.1109/APEMC.2016.7522972","DOIUrl":"https://doi.org/10.1109/APEMC.2016.7522972","url":null,"abstract":"To reduce the electromagnetic radiation, we set a metal layer to surround lightning rod for shielding. Then we use the finite-difference time-domain (FDTD) method to analyze the field distribution laws of this situation. Moreover, we also calculate the corresponding field distribution without metal layer for comparison. It is shown that the metal layer affects the electromagnetic field distribution laws, especially for the vertical electric field Ez above the ground. The field value decrease as the distance from the lightning channel increases and the extent reduces except the Ez above the ground with metal layer exists. No matter the metal layer existing or not, the field distribution laws below the ground are the same. In addition, there exist many differences between electromagnetic fields obtained above and below the ground with metal layer exists, including wave shape and value. The finite conductivity of metal layer and discharge occurring between the rod and the coaxial metal layer should be considered.","PeriodicalId":358257,"journal":{"name":"2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC)","volume":"126 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134375650","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 : 2016-05-17DOI: 10.1109/APEMC.2016.7522897
José Alberto, U. Reggiani, L. Sandrolini
In this paper the magnetic near field from a wireless power transfer (WPT) system that employs an array of magnetically coupled resonators is assessed with the aim of examining the relation between the termination impedance of the system and the magnetic near field generated. The electromotive force at the terminals of a circular probe produced by the time-varying magnetic near field generated by the WPT system is measured and the corresponding magnetic flux density is calculated. The measurements are compared with the results obtained using a finite-element software. It is found that, despite the fact that the field at a small distance is much higher than that at a higher distance from the array, not all the field is confined into to the array of resonators. Furthermore, by analysing the measurements and simulations it can be observed that, when the system is matched, in no case the obtained peak values for the magnetic flux density are the highest ones.
{"title":"Magnetic near field from an inductive power transfer system using an array of coupled resonators","authors":"José Alberto, U. Reggiani, L. Sandrolini","doi":"10.1109/APEMC.2016.7522897","DOIUrl":"https://doi.org/10.1109/APEMC.2016.7522897","url":null,"abstract":"In this paper the magnetic near field from a wireless power transfer (WPT) system that employs an array of magnetically coupled resonators is assessed with the aim of examining the relation between the termination impedance of the system and the magnetic near field generated. The electromotive force at the terminals of a circular probe produced by the time-varying magnetic near field generated by the WPT system is measured and the corresponding magnetic flux density is calculated. The measurements are compared with the results obtained using a finite-element software. It is found that, despite the fact that the field at a small distance is much higher than that at a higher distance from the array, not all the field is confined into to the array of resonators. Furthermore, by analysing the measurements and simulations it can be observed that, when the system is matched, in no case the obtained peak values for the magnetic flux density are the highest ones.","PeriodicalId":358257,"journal":{"name":"2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127572013","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 : 2016-05-17DOI: 10.1109/APEMC.2016.7522758
T. Ohtsu, K. Sagisaka
The purpose of this study is to support the countermeasure technology in the system level by using the developed observation system. It can observe a discharge current waveform, a discharge voltage waveform and a radiated electromagnetic waveform to make comparison of ESD protection effect between protective elements on electric devices and ESD countermeasure materials for the system level ESD countermeasure.
{"title":"Study on discharge characteristics of the ESD protection material and the effect of protection element","authors":"T. Ohtsu, K. Sagisaka","doi":"10.1109/APEMC.2016.7522758","DOIUrl":"https://doi.org/10.1109/APEMC.2016.7522758","url":null,"abstract":"The purpose of this study is to support the countermeasure technology in the system level by using the developed observation system. It can observe a discharge current waveform, a discharge voltage waveform and a radiated electromagnetic waveform to make comparison of ESD protection effect between protective elements on electric devices and ESD countermeasure materials for the system level ESD countermeasure.","PeriodicalId":358257,"journal":{"name":"2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC)","volume":"01 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130989556","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 : 2016-05-17DOI: 10.1109/APEMC.2016.7522811
Xiangming Zhang, Chengyu Deng, Jianxuan Li, Zhihua Zhao, Lei Zhang
In power electronic devices, the winding temperature of the transformer in operation needs to be monitored in real time. But the Electromagnetic Interference(EMI) problems cause the measured winding temperature fluctuates anomalously. In this paper, the 10MVA transformer in the cabinet of a transformer rectifier is studied as a specific case, the temperature measurement circuit of the transformer winding is introduced, according to which the causes of winding temperature fluctuation is analyzed. Finally, the solution of the winding temperature fluctuation is proposed and verified by experiments.
{"title":"Identification and solution of EMI influences on transformer windings temperature measurement","authors":"Xiangming Zhang, Chengyu Deng, Jianxuan Li, Zhihua Zhao, Lei Zhang","doi":"10.1109/APEMC.2016.7522811","DOIUrl":"https://doi.org/10.1109/APEMC.2016.7522811","url":null,"abstract":"In power electronic devices, the winding temperature of the transformer in operation needs to be monitored in real time. But the Electromagnetic Interference(EMI) problems cause the measured winding temperature fluctuates anomalously. In this paper, the 10MVA transformer in the cabinet of a transformer rectifier is studied as a specific case, the temperature measurement circuit of the transformer winding is introduced, according to which the causes of winding temperature fluctuation is analyzed. Finally, the solution of the winding temperature fluctuation is proposed and verified by experiments.","PeriodicalId":358257,"journal":{"name":"2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128913934","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 : 2016-05-17DOI: 10.1109/APEMC.2016.7522915
Shuai Ma, Min Pan, Wenxiao Fang, P. Lai
In this paper, we investigate the conducted emission of I/O pins near power pairs of a microcontroller integrated circuit. Our investigation show that with the increase of the distance from the power pairs the I/O pin gives decreasing conducted emission. The spread of the conducted emission from power pairs to I/O pins can be depicted by mutual inductance and mutual capacitor in a lumped circuit model.
{"title":"Conducted emission of I/O pins near power pairs of a microcontroller integrated circuit","authors":"Shuai Ma, Min Pan, Wenxiao Fang, P. Lai","doi":"10.1109/APEMC.2016.7522915","DOIUrl":"https://doi.org/10.1109/APEMC.2016.7522915","url":null,"abstract":"In this paper, we investigate the conducted emission of I/O pins near power pairs of a microcontroller integrated circuit. Our investigation show that with the increase of the distance from the power pairs the I/O pin gives decreasing conducted emission. The spread of the conducted emission from power pairs to I/O pins can be depicted by mutual inductance and mutual capacitor in a lumped circuit model.","PeriodicalId":358257,"journal":{"name":"2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133795206","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 : 2016-05-17DOI: 10.1109/APEMC.2016.7522833
Po-Chou Pan, Shao-Nan Hong, S. Wu
Designing a noncontact measurement probe can reduce costs. But this probe may be two questions, the first question is how to correctly received the signal, because, unlike non-contact probe contact probe signals can be passed through the probe correctly, the second question is how to reduce signal attenuation in the probe passes, because non-contact probe signal is received via an antenna, the signal value obviously much less compared to the contact probe. In order to solve these two problems, the design of a probe, the probe with good gain there is a system to convert electrical signals into optical signals.
{"title":"Optoelectronic E-field probes with amplifier for interference free near field antenna measurements","authors":"Po-Chou Pan, Shao-Nan Hong, S. Wu","doi":"10.1109/APEMC.2016.7522833","DOIUrl":"https://doi.org/10.1109/APEMC.2016.7522833","url":null,"abstract":"Designing a noncontact measurement probe can reduce costs. But this probe may be two questions, the first question is how to correctly received the signal, because, unlike non-contact probe contact probe signals can be passed through the probe correctly, the second question is how to reduce signal attenuation in the probe passes, because non-contact probe signal is received via an antenna, the signal value obviously much less compared to the contact probe. In order to solve these two problems, the design of a probe, the probe with good gain there is a system to convert electrical signals into optical signals.","PeriodicalId":358257,"journal":{"name":"2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115409681","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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