This paper discusses influences of using current transformer (CT) as feedback element in a cascade multilevel converter. First, a simplified transfer function model of CT is built by small signal test and the model pa...
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This paper proposes a new single-switch (SS) three-port converter (TPC) family. The attractive features of the proposed SS-TPCs are: (1) only one switch, two inductors and several diodes are required, the power stage ...
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ISBN:
(纸本)9781467343541
This paper proposes a new single-switch (SS) three-port converter (TPC) family. The attractive features of the proposed SS-TPCs are: (1) only one switch, two inductors and several diodes are required, the power stage is compact;(2) the duty cycle and switching frequency are utilized for energy management, the control circuit is simple;and (3) the redundant charging and discharging processes of the battery are alleviated because a direct current path from source to load is built, the lifespan of battery can be prolonged. The derivation law, circuit analysis, design process, energy management method and design example will be discussed in this paper. Analysis and experiments show that the proposed SS-TPC family can compromise several critical issues such as size, cost and lifespan of battery, and could be the potential candidates for low-power stand-alone renewable system.
For the first time, bidirectional multi-band multi-gigabit wireless-over-fiber transmission at 60-GHz mm-wave band has been accomplished with centrally supplied LO service. It does not require mm-wave LO devices in ea...
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ISBN:
(纸本)9781557529626
For the first time, bidirectional multi-band multi-gigabit wireless-over-fiber transmission at 60-GHz mm-wave band has been accomplished with centrally supplied LO service. It does not require mm-wave LO devices in each base stations and mobile terminals.
To solve the problem of calibrating current summation measurement system, a novel high-precision current adder based on current comparator principle is presented. It contains primary windings of six channels, feedback...
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A 60,000-A dc comparator based on dual-loop control system with self-calibration and mutual-calibration is developed. The dual-loop control principle, which is that the bias winding's current automatically balance...
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To solve the problem of calibrating high-precision heavy direct current comparator and related metering device, a self-calibration method based on small current differential principle is proposed, and the formulas bas...
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The tunability,high power and flexible picoseconds-pulse time structure of terahertz(THz)radiation make the THz free-electron laser(FEL)a very attractive THz source of coherent *** paper focuses on the development and...
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The tunability,high power and flexible picoseconds-pulse time structure of terahertz(THz)radiation make the THz free-electron laser(FEL)a very attractive THz source of coherent *** paper focuses on the development and perspectives of THz radiation sources based on the *** principles of the low gain THz FEL oscillator,the SASE THz FEL amplifier and the supperradiant THz FEL are reviewed briefly,and the key technologies of THz FEL,such as injector,accelerator,undulator and optical cavity,are discussed,*** current status of and future prospects for THz radiation sources based on the FEL are emphasized in this *** research and development have shown bright future in free-electron laser(FEL)THz radiation *** potential applications can be carried out in the field of imaging,material research,biology medicine,communication,diagnostics and many others.
Wide-area backup protection is a novel technique presented in recent years, which uses multisource information to make fault identification decision and availably prevents catastrophic blackouts. However, the property...
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An ultra high voltage (UHV) AC tie line that connects North China and Central China power grid has been put into operation in 2009. This paper presents a method to calculate the peak value of active power oscillation ...
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