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It has been a hot issue and also a difficulty to study the fault tolerance of multilevel converters. The topology changes to eight-switch three-phase inverter (ESTPI) if one leg of three-level NPC inverter is failed. An optimal modulation algorithm of ESTPI is proposed in this paper. Due to the loss of one leg, the DC-link voltage utilization of ESTPI is reduced by half. Hence, an overmodulation algorithm...
A comprehensive behavioral model of Track-and-Hold Amplifier (THA) based on GaAs HBT, implemented in MATLAB-SIMULINK platform, is presented in this paper. The main error sources of the holding capacitor and non-linear on-resistance are investigated, and the relative non-idealities are modeled. With the behavioral model, SIMULINK simulations were performed to analyze the non-ideal error sources and...
Feeder topology representation method has an important impact on the research of distribution network. According to the structure of the feeder, this paper proposes a new representation method for feeder topology based on multiway tree. In the method, we take power, load, bus, and line in the feeder as nodes and take the switches as lines to connect the nodes to compose a multiway tree, which can...
During the past few decades, networked systems have gained increasing attention and a wider range of applications have been found in areas such as industrial control and signal processing. This paper provides a brief survey of recent results on control and filtering for networked systems. In-depth analysis and discussion is first made on networked control and event-triggered control, where existing...
This paper deals with the event-triggered distributed H∞ filtering for a class of networked systems with sensor networks. The topology of the sensor network is supposed to be time-varying. Whether or not a sampled data packet of a sensor node should be transmitted to its neighbors is determined by a predefined event-triggering condition, which closely depends on the variation of the sensor network...
The main power of joint-texas experimental tokamak (J-TEXT) power supply is a 100MVA pulse generator unit, which is consisted of a 1417kW motor, a 75T flywheel and a 100MVA pulse generator. The generator unit was designed in USA, with a grid of 12kV/60Hz, but in China the grid is 10kV/50Hz. Due to the difference of grid frequency, the rotational speed can only reach 5/6 of the rated value, and the...
Based on CST, models of the heavy current facilities in the subway system have been built and the simulation has been completed to acquire the radiation of EMI. By comparing the results of the simulation with the corresponding results of the actual measurement, the models are modified until the simulation of the models could mainly reflect the situation of Electromagnetic field around the heavy current...
This article describes the working principle and driving schedule of Three-phase bridge inverter, proposing a PWM Control Realization method which Duty Cycle is adjustable and the delay time of the switch tube on and off can be preset. The generator uses CPLD for hardware foundation, and based on VHDL hardware description language for the simulation test in Max+Plus□.The PWM controller which uses...
It's the tread of many-cores processors development which support direct link interface. I/O coherence process methods of inter-chips pay important influence to I/O performance, so it's very necessary to optimize inter-chip I/O coherence processing. Firstly, the reason which I/O coherence inter-chip produced will be studied. Then presented a novel enhance synchronization I/O coherence method and boundary...
In this paper, a CMOS peak detector is proposed. The proposed peak detection is based on signal's slope variation and it can be easily exploited for positive as well as negative peak detection. Besides it can also be used for multiple peak detection without needing resetting operation, making the circuit implementation quite simple. A switched-capacitor-based (SC-based) implementation is given along...
A single channel 2 GS/s 6-bit ADC with cascade resistive averaging is demonstrated in 0.18 ??m CMOS. The proposed power efficient crossing connection method of averaging resistors has less reference voltage consumed than convention with excellent offset averaging. The peak DNL and INL are measured as 0.26 LSB and 0.21 LSB, respectively. The SNDR and SFDR have achieved 34.2 and 37.5 dB, respectively,...
The paper deals with the control of the multiple armature-winding hybrid-excitation generator (MAHEG) which is used for wind generation. Thus, a rectifier is required between the generator and DC bus. A diode rectifier is preferred here due to its great reliability and because it is also a low-cost solution. Discontinuous PWM have gained special attention for their reduced switching losses. According...
A control method of electromagnetic energy release and storage in a power inductor is introduced. The control techniques and the practical circuit made can control the inductor energy exchanges so that the release of inductor energy can be manageable. The practical circuit operation of this control technology and the circuit power loss effect are discussed and analyzed. Since the power loss by the...
A method of electromagnetic energy release and storage control is introduced. The method and the practical circuit control the energy exchanges so that the release of the inductor energy can be more stable and manageable. The practical operation of this method and its circuit analysis are discussed, and its potential application is also introduced.
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