The Experts below are selected from a list of 69231 Experts worldwide ranked by ideXlab platform
Mingxuan Chen - One of the best experts on this subject based on the ideXlab platform.
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analysis of the vacuum arc interruption process in aviation Intermediate Frequency power supply systems
Energies, 2017Co-Authors: Yuan Jiang, Jianwen Wu, Mingxuan ChenAbstract:In this paper, we present our research into the interruption performance of vacuum circuit breakers in aviation Intermediate-Frequency (360 Hz to 800 Hz) power supply systems. Intermediate-Frequency vacuum arc experiments were carried out in interrupters with a diameter of 41 mm and CuCr50 alloy contact material. The results show that, as the Frequency and peak value of the current increase, both the peak value and rise rate of the Intermediate-Frequency vacuum arc voltage also increase, and the interruption ability decreases. However, compared to the power Frequency current at the same value, the erosion of the contacts is weaker over a shorter arc period. When the vacuum arc reignites, metal droplets are emitted from the contacts. The drive force is from the center of the contact to the edge. If the density of the plasmas and metal vapors and the number of the metal droplets reaches a certain level, the arc may break down, which will cause the interruption to fail.
Yuan Jiang - One of the best experts on this subject based on the ideXlab platform.
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analysis of the vacuum arc interruption process in aviation Intermediate Frequency power supply systems
Energies, 2017Co-Authors: Yuan Jiang, Jianwen Wu, Mingxuan ChenAbstract:In this paper, we present our research into the interruption performance of vacuum circuit breakers in aviation Intermediate-Frequency (360 Hz to 800 Hz) power supply systems. Intermediate-Frequency vacuum arc experiments were carried out in interrupters with a diameter of 41 mm and CuCr50 alloy contact material. The results show that, as the Frequency and peak value of the current increase, both the peak value and rise rate of the Intermediate-Frequency vacuum arc voltage also increase, and the interruption ability decreases. However, compared to the power Frequency current at the same value, the erosion of the contacts is weaker over a shorter arc period. When the vacuum arc reignites, metal droplets are emitted from the contacts. The drive force is from the center of the contact to the edge. If the density of the plasmas and metal vapors and the number of the metal droplets reaches a certain level, the arc may break down, which will cause the interruption to fail.
Dang Fuxiang - One of the best experts on this subject based on the ideXlab platform.
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new half bridge igbt inverter power supply for Intermediate Frequency induction heating
IEEE Transactions on Power Electronics, 2006Co-Authors: Dang FuxiangAbstract:In the full-bridge thyristor shunt-wound inversion power supply,the efficiency of heating smaller forgings limited by the working Frequency is low because of the high output voltage,the long induction coil,and the great noise.In order to solve these problems,we develop a new kind of half-bridge IGBT inverter for middle Frequency induction heating power supply.The half-bridge inversion circuit is consisted of a pair of diodes and reverse shunt-wounded IGBT module.The controlling loop includes start-up circuit,Frequency tracking circuit,driving signal circuit,and water lack protecting circuit.The loop can generate Frequency tracking pulse signals of the furnace.The signals go through a triangle wave generator and interlocked by diodes then drive the module.Thus makes the loop′s structure simple.In this paper,the structure and working principle of the main circuit and controlling circuit are analyzed.The results of the main circuit simulation and experiment indicate that the new power supply′s output voltage is about 200V,it′s working Frequency may reach 10kHz,and it′s power factor close to unit.The galvanothermy efficiency of the electrical sources improved.
Preu Sascha - One of the best experts on this subject based on the ideXlab platform.
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W-band heterodyne wireless system with 2.3 GHz Intermediate Frequency driven entirely by ErAs:In(Al)GaAs photoconductors
'Institute of Electrical and Electronics Engineers (IEEE)', 2019Co-Authors: De Jesus Fernandez Olvera Anuar, Morales Alvaro, Dong Yunfeng, Konstantinou Dimitrios, Rommel Simon, Johansen Tom, Okonkwo Chigo, Monroy, Idelfonso Tafur, Preu SaschaAbstract:We demonstrate a heterodyne wireless system using only ErAs:In(Al)GaAs photoconductors driven by two independent telecom laser signals. The maximum Intermediate Frequency (IF) was 2.3 GHz, only limited by the bandwidth of the post-detection electronics. The maximum signal-to-carrier ratio achieved was 42.6 dB
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W-band heterodyne wireless system with 2.3 GHz Intermediate Frequency driven entirely by ErAs:In(Al)GaAs photoconductors
IEEE Computer Society, 2019Co-Authors: Anuar De ,jesus Fernandez Olvera, Dong Yunfeng, Okonkwo Chigo, Morales Vicente A, Konstantinou D, Rommel S, Johansen, Tom Keinicke, Tafur Monroy I Idelfonso, Preu SaschaAbstract:\u3cp\u3eWe demonstrate a heterodyne wireless system using only ErAs:In(Al)GaAs photoconductors driven by two independent telecom laser signals. The maximum Intermediate Frequency (IF) was 2.3 GHz, only limited by the bandwidth of the post-detection electronics. The maximum signal-to-carrier ratio achieved was 42.6 dB.\u3c/p\u3
Jianwen Wu - One of the best experts on this subject based on the ideXlab platform.
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analysis of the vacuum arc interruption process in aviation Intermediate Frequency power supply systems
Energies, 2017Co-Authors: Yuan Jiang, Jianwen Wu, Mingxuan ChenAbstract:In this paper, we present our research into the interruption performance of vacuum circuit breakers in aviation Intermediate-Frequency (360 Hz to 800 Hz) power supply systems. Intermediate-Frequency vacuum arc experiments were carried out in interrupters with a diameter of 41 mm and CuCr50 alloy contact material. The results show that, as the Frequency and peak value of the current increase, both the peak value and rise rate of the Intermediate-Frequency vacuum arc voltage also increase, and the interruption ability decreases. However, compared to the power Frequency current at the same value, the erosion of the contacts is weaker over a shorter arc period. When the vacuum arc reignites, metal droplets are emitted from the contacts. The drive force is from the center of the contact to the edge. If the density of the plasmas and metal vapors and the number of the metal droplets reaches a certain level, the arc may break down, which will cause the interruption to fail.