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检索条件"机构=Aviation Key Lab. of Science and Technology on Aero Electromechanical System Integration"

共 197 条记录，以下是181-190 订阅

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The study on power generation technology by heat energy of reheated-based Rankine cycle

The study on power generation technology by heat energy of r...

引用

2016 4th International Conference on Machinery,Materials and Computing technology(ICMMCT 2016)

作者： Xuejuan Zhao Aicheng Li School of Aeronautic Science Engineering Beihang University Aviation Key Laboratory of Science and Technology On Aero Electromechanical System Integration

ISBN: (纸本)9781510821934

This paper discussed the operation principle of reheated Rankine cycle according to the first law of thermodynamics and proposed a method to acquire the optimum reheated pressure ratio based on the highest cycle thermal efficiency. In order to verify the rationality and validity of this method, this paper selected R134 a, R11 and R227 ea to be the working fluids and calculated the thermodynamic performance of the reheated Rankine cycle system with using MATlab.and REFPROP. This paper also studied the thermodynamic performance of the conventional Rankine cycle system under the same conditions to compare the difference with the reheated cycle pattern.

关键词： reheated Rankine cycle average temperature of heat absorption optimum reheated pressure ratio thermodynamic performance

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Input-Parallel Output-Series DC/AC Converter for On-Board EV Charger

Input-Parallel Output-Series DC/AC Converter for On-Board EV...

引用

IEEE Conference on Vehicle Power and Propulsion (VPPC)

作者： Yue Zhang Zheng Wang Ming Cheng Liang Xu School of Electrical Engineering Southeast University China Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration China

ISBN: (纸本)9781509035298

An input-parallel output-series full-bridge DC/AC converter for on-board Electric Vehicle (EV) charger is proposed in this paper with the merits that low input current ripple and output voltage ripple. It can also decrease the current stress on the primary side devices and voltage stress on secondary side devices. This proposed DC/AC converter interleaves two isolated full-bridge converters with parallel input and series output connection. The DC/DC converter is followed by a current-fed inverter with inductor link. The merits such as high voltage turn ratio make the converter suitable for EV on-board chargers. Steady-state operation modes, analysis, simulation results are presented in this paper. A 1KW lab.ratory prototype is built to demonstrate the validity of the proposed topology. The results of experiment demonstrate the validity of proposed topology well.

关键词： Inverters Inductors Stress Voltage control Topology Modulation Bridge circuits

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Application of Class-E Converter in Magnetic Resonant WPT system

Application of Class-E Converter in Magnetic Resonant WPT Sy...

引用

2016 IEEE/CSAA International Conference on Aircraft Utility systems(AUS)

作者： CHEN Wen-xian CHEN Qian-hong Nanjing Engineering Institute of Aircraft System/Aviation Key Laboratory of Science and Technology on Aero Electromechanical system integration IEEE Nanjing University of Aeronautics and Astronautics

In this paper,the maximum voltage gain and output power design method based on the optimal distance point is also put ***,the research on the efficiency evaluation in Class-E converter based on GaN devices has shown that GaN transistor can obviously brings higher transmission efficiency,smaller size and lower cost in Class-E converter due to the lower R and the gate charge（Qg）.

关键词： magnetic resonance WPT wireless power transfer Class-E converter GaN transistor

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Direct torque control of dual three-phase PMSM drives based on two-step voltage vector synthesis SVM

Direct torque control of dual three-phase PMSM drives based ...

引用

International Conference on Power Electronics and Motion Control (IPEMC)

作者： Xueqing Wang Zheng Wang Jian Chen Ming Cheng Liang Xu School of Electrical Engineering Southeast University Nanjing China Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing China

ISBN: (纸本)9781509012114

In this paper, a space vector modulation (SVM) based DTC scheme is proposed for the dual three-phase PMSM. This scheme provides an effective solution for multiphase drives by inheriting the advantages of fast dynamic performance and robust control architecture of DTC. Besides, the proposed scheme can suppress the current harmonics induced not only from inherent property of dual three-phase PMSM, but also from nonlinear factors such dead-time and asymmetry in drives. The vector synthesis process in the scheme has been simplified compared to conventional SVM-DTC scheme. The experimental results are given to verify the validity of the proposed SVM-DTC scheme.

关键词： Harmonic analysis Support vector machines Switches Stators Voltage control Torque Power electronics

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Application of class-E converter in magnetic resonant WPT system

Application of class-E converter in magnetic resonant WPT sy...

引用

IEEE International Conference on Aircraft Utility systems (AUS)

作者： Wen-Xian Chen Qian-Hong Chen Aviation Key Laboratory of Science and Technology on Aero Electromechanical system integration Nanjing Engineering Institute of Aircraft System Nanjing China Nanjing University of Aeronautics and Astronautics Nanjing Jiangsu CN

ISBN: (纸本)9781509010882

In this paper, the maximum voltage gain and output power design method based on the optimal distance point is also put forward. Meanwhile, the research on the efficiency evaluation in Class-E converter based on GaN devices has shown that GaN transistor can obviously brings higher transmission efficiency, smaller size and lower cost in Class-E converter due to the lower R ds(on) and the gate charge (Q g ).

关键词： Magnetic resonance Gallium nitride MOSFET RLC circuits Resistance Switches Inductors

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Investigation into influence factors of synchronous movement of multi-cylinders

Investigation into influence factors of synchronous movement...

引用

IEEE International Conference on Aircraft Utility systems (AUS)

作者： Chao Hu Pengfei Zhang Xiaoping Ouyang Houtao Ku Qinghe Zhou Enxiao Zhang State Key Lab. of Fluid Power Transmission and Control Zhejiang University Hangzhou China Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing China The High School Attached to Zhejiang University Hangzhou China

ISBN: (纸本)9781509010882

Seal is one of the most important characteristics for cylinders and suitable seal configuration will guarantee the long life cycle of the seal and the cylinder. Experiment is the only way which can demonstrate the best seal configuration in applications. In this paper, one approach is brought forward for testing the seal performance of cylinders with different seals configurations at the same load working condition for saving the test time. In the test-rig, the synchronization of cylinders is one of the key technologies. The test system is modelled in the AMESim software. The effect caused by the changes of the different physical parameters is analyzed, such as load stiffness, viscous damping coefficient of cylinder, dead volume of cylinder and internal leakage coefficient. The experiment is carried out and test results agree with the simulation results. Finally, the appropriate solution is proposed for improving the synchronization of the multi-cylinders further.

关键词： Synchronization Valves Seals Damping Load modeling Springs Servomotors

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The dual-channel magnetically integrated chargers for plug-in electric vehicles

The dual-channel magnetically integrated chargers for plug-i...

引用

IEEE Energy Conversion Congress and Exposition

作者： Bochen Liu Zheng Wang Yue Zhang Ming Cheng Liang Xu School of Electrical Engineering Southeast University Nanjing Jiangsu Province China Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing Jiangsu Province China

ISBN: (纸本)9781509007387

In this paper, a dual-channel isolated three-phase magnetically integrated chargers (MICs) are presented for plugin electric vehicles. The key is to apply and operate two interleaved power charging circuits, each of which is composed of one dual-active-bridge (DAB) isolated converter and one three-phase grid inverter. The proposed configuration not only offers isolated charging but also provides modular design and operation for each channel, which are useful for high-power applications in fast charging. The interleaved operation and the phase-shifted carriers enable low current ripple on battery side and better harmonic performance on grid side. Furthermore, chaotic modulation has been applied to reduce the distinct switching harmonics in spectrum, which will facilitate improving the conducted electromagnetic compatibility (EMC). The detailed design of modulation strategy and control scheme are described in this paper. Experimental results have been presented for a 1-kW lab.ratory prototype to verify the validity of the proposed configuration and schemes.

关键词： plug-in electric vehicles dual-channel integrated chargers

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Active damping of LC resonance for paralleled indirect matrix converter based on cascaded control

Active damping of LC resonance for paralleled indirect matri...

引用

IEEE Energy Conversion Congress and Exposition

作者： Yang Xiao Zheng Wang Shuai You Ming Cheng Liang Xu School of Electrical Engineering Southeast University Nanjing Jiangsu Province China Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing Jiangsu Province China

ISBN: (纸本)9781509007387

The indirect matrix converters (IMC) offer the advantages of high reliability and compactness in structure due to no large energy storage components in virtual DC side, and thus have a promising application in the future. However, the LC resonance caused by input filter is one reason keeps it from being utilized in industry. Different from pervious solutions of LC resonance damping for single IMC, this paper proposes an active damping strategy for the paralleled IMC with both interleaved operation and cascaded control of input LC filter. The key is to apply the closed-loop control of grid currents to generate the references for capacitor voltages, which are tracked by the inner capacitor voltage loop. By designing the control parameters properly, this method can not only suppress the LC resonance effectively but also offer accurate control of grid currents. In order to further mitigate resonance, the interleaved operation is applied to reduce specific order harmonic around resonant frequency of LC filter. No additional cost will be required for the proposed interleaved and cascaded control strategy. Furthermore, the feed-forward terms of voltage drop on filter inductor and capacitor currents are added to the control, in such a way that the decoupling effects between the d-axis and q-axis are removed and the dynamic response becomes better. Both simulation and experiments are given to verify the correctness and feasibility of the proposed strategy.

关键词： Resonance Active damping control Paralleled indirect matrix converter LC filter

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Commercial aircraft distribution network reconfiguration based on power priority

Commercial aircraft distribution network reconfiguration bas...

引用

IEEE Annual Southern Power Electronics Conference (SPEC)

作者： Binxin Tang Shanshui Yang Li Wang Huijuan Zhang Dept. Electrical Engineering Nanjing University of Aeronautics and Astronautics Nanjing China Dept. Electrical Engineering Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration Nanjing China

ISBN: (纸本)9781509015474

Network reconfiguration is the key technology to realize the autonomous operation and safety enhancement in aircraft power distribution system. The goal of reconfiguration is to achieve maximal power supply under different fault conditions. This paper proposes a power priority based reconfiguration algorithm. To verify the validity of the algorithm, an aircraft power distribution system is discussed. Experimental results are given to verify the validity of the algorithm.

关键词： Aircraft Power supplies Aircraft propulsion aerospace electronics Power distribution aerospace control

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Investigation into Influence Factors of synchronous movement of Multi-cylinders

Investigation into Influence Factors of synchronous movement...

引用

2016 IEEE/CSAA International Conference on Aircraft Utility systems(AUS)

作者： Chao Hu Pengfei Zhang Xiaoping Ouyang Houtao Ku Qinghe Zhou Enxiao Zhang State Key Lab.of Fluid Power Transmission and Control Zhejiang University Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration State Key Lab.of Fluid Power Transmission and Control Zhejiang Univ. The High School Attached to Zhejiang University

Seal is one of the most important characteristics for cylinders and suitable seal configuration will guarantee the long life cycle of the seal and the *** is the only way which can demonstrate the best seal configuration in *** this paper,one approach is brought forward for testing the seal performance of cylinders with different seals configurations at the same load working condition for saving the test *** the test-rig,the synchronization of cylinders is one of the key *** test system is modelled in the AMESim *** effect caused by the changes of the different physical parameters is analyzed,such as load stiffness,viscous damping coefficient of cylinder,dead volume of cylinder and internal leakage *** experiment is carried out and test results agree with the simulation ***,the appropriate solution is proposed for improving the synchronization of the multi-cylinders further.

关键词：

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