The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In power electronics, the compensators are required to shape the loop gain of the transfer function. The purpose of shaping the loop gain transfer function is to obtain a desired crossover frequency, phase margin and gain margin. The compensators can be constructed by the operational amplifier (op amp). There are a few commonly used compensators built up by the op amp, to be discussed herein. By using...
We design a T-shape structure reflecting mirror covered a gold thin film on the high-resistivity silicon substrate (ρ=1000 Ω·Cm) for the detector array. The electric field distribution of the T-shape structure is simulated by using finite difference time domain (FDTD) solutions in the frequency range from 300 GHz to 400 GHz. The electric field can be gathered in the central area of the silicon substrate...
In this paper, the ultrahigh step-down converter with an active clamp circuit is proposed. With the active clamp circuit, the voltage spike across the central-tapped switch can be suppressed. The switches can achieve zero-voltage-switching (ZVS) turn-on or zero-current-switching (ZCS) turn-off. Finally, theoretical analysis and experimental results are given to verify the feasibility and effectiveness...
Reichert's theorem (1969), a fundamental theorem of network synthesis, completely characterises minimum reactive synthesis of positive-real biquadratic impedances. The crucial part of the original approach depends on a complicated topological argument. This paper provides an alternative proof using the recently introduced concept of regular positive-real functions.
An improved non-isolated coupled-inductor-based high-step-down converter is presented in this paper. Compared with other coupled-inductor-based high-step-down converters, the proposed converter features zero DC-offset current and non-pulsating output current. In the proposed converter, one of the DC-blocking capacitors is connected between the input voltage and the coupled inductor. Therefore, the...
A non-isolated dual half-bridge zero-voltage-switching (ZVS)/ zero-current-switching (ZCS) high step-down converter with zero dc bias current and active clamp is presented in this paper. Owing to the use of the dc-blocking capacitors, the dc magnetizing inductance current of the coupled inductor is zero. Thus, the magnetizing current can be both positive and negative, which means that the entire core...
Sensing and imaging at millimeter-wave and THz frequencies is promising for a wide range of applications, including security, industrial control, healthcare, and scientific metrology. The development of high-sensitivity, low noise detectors based on interband tunneling in III-V heterostructure devices, and their integration into subsystems is promising for realizing the potential of these applications...
Two-Way Satellite Time and Frequency Transfer (TWSTFT or TW) is one of the primary time transfer techniques for UTC generation. In this framework the Triangle Closure Calibration (TCC) method has been used to calibrate links between certain laboratories whose links to the pivot lab are directly calibrated. TCC is based upon requiring the closure of three co-joined links to be zero. In this paper,...
In this paper, a novel galvanic isolated high step-up converter is presented, which is suitable for renewable energy applications and integrates a boost converter, a coupled inductor, a charge pump capacitor cell, and an LC snubber. Since the proposed converter possesses an input inductor, the input current is continuous. Furthermore, the proposed converter can achieve high voltage gain without extremely...
A novel clamp circuit applied to the flyback converter is proposed to improve the efficiency of the active clamp flyback converter during light load. The proposed clamp circuit combines the active clamp circuit and the transient voltage suppression (TVS) circuit which belongs to the passive clamp circuit. Therefore, during light load, the MOSFET switch of the active clamp circuit is always turned...
This paper proposes a new topology for Unified Power Flow Controller (UPFC), traditional UPFC based on Voltage Source Controller (VSC) has a higher switch frequency, an obvious voltage harmonic and a lower voltage level. In the new circuit, Modular Multilevel Converter (MMC) has replaced VSC. Moreover, UPFC has a big risk to suffer the short circuit fault, which can cause the damage to device, especially...
The KY converter, which features fast transient response, non-pulsating output current and simple structure, is a novel step-up topology to overcome the disadvantages of the traditional boost converter. Therefore, in this paper, based on the method of state-space averaging, the KY converter, including the inductor copper resistance and the output capacitor resistance is analyzed and modeled as a small-signal...
The KY boost converter, which combines the KY converter and the traditional synchronously rectified (SR) boost converter, is a novel step-up converter to overcome the disadvantages of the KY converter, which has a quite low voltage gain. Compared with the KY converter, the KY boost converter has one additional inductor and one additional capacitor. Therefore, the dynamic characterization of the KY...
In this study, a high voltage-boosting converter is presented, which combines a coupled inductor, a charge pump capacitor, and active clamp circuit, so as to boost up the output voltage as well as to make the main switch turned on with zero voltage switching. In this converter, the coupled inductor behaves as not only an inductor but also a transformer. And, the active clamp switch in the active clamp...
In this paper, the proposed sampling structure based on one-comparator sampling is presented, which can improve the transient response. This method is verified by a synchronously-rectified buck converter with switching frequency of 240kHz, and the digital controller takes as a control kernel the EP1C3T100 FPGA created by Altera Co., along with the VHDL language to program this controller.
In this paper a novel simple high step-up converter using a coupled inductor and a charge pump capacitor is presented. Compared with the traditional boost converter and other converters with simple structures, the proposed converter can achieve higher voltage gain. The leakage inductance energy of the coupled inductor can be recycled without any clamp circuit. Moreover, the active switch is not floating;...
In this paper, the proposed sampling structure based on one-comparator sampling is presented, which can significantly reduce the system clock frequency from 100MHz to 25MHz, so as to reduce chip area. This method is verified by a synchronously-rectified buck converter with a switching frequency of 200kHz, and the digital controller takes as a control kernel the EP1C3T100 FPGA created by Altera Co...
Ge-based diluted magnetic semiconductors have drawn extensive attention over the past decades due to their potential to be applied in spintronic devices and to be integrated with the mainstream Si microelectronics as well. The hole-mediated effect in diluted magnetic semiconductors provides the possibility to realize the control of magnetic properties by the electrical control of free carriers. In...
A position sensor is required in a Permanent magnet synchronous machines(PMSM) system, which will raise cost and reduced reliability. Sensorless control of PMSM drive overcome these difficul-ties. In the start-up control of sensorless PMSM, may cause a starting failure due to unknown rotor initial position[1].a voltage pulse injection method based on magnetic saturation effect has been proposed[2]...
Resistive switching random access memory (RRAM) is a leading candidate for next-generation nonvolatile and storage-class memories and monolithic integration of logic with memory interleaved in multiple layers. To meet the increasing need for device-circuit-system co-design and optimization for applications from digital memory systems to brain-inspired computing systems, a SPICE model of RRAM that...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.