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.
Voltage Balance of the series-connected dc-link capacitors is the key problem of three-level diode-clamped converters. In this paper, an auxiliary voltage balance circuit (VBC) is presented to maintain the voltage balance of dc-link capacitors. The voltage balance circuit consists of a clamping capacitor and a current-limiting inductor. With the clamping capacitor, the voltage stresses of the auxiliary...
The performance of the laboratory scale anaerobic baffled reactor (ABR) was investigated by the use of granular sludge to treat alkali-minimization and dyeing-printing wastewater (ADW-water). The experiment showed that the start-up of reactor was completed after 70 days operation with sustaining high microbial activity. Under the condition of hydraulic retention time (HRT)=36 h, organic loading rate...
The calculation model was built under cold condition, based on real geometric structure, 1:1 size experimental device of main reactor of TiO2 in Jinzhou Titanium Industry. And numerical simulation was carried out by commercial CFD software, aiming to analyze internal flow and mixture of multi inlet vertical jet and main-stream. By comparing the numerical simulation results with the experimental data,...
In this paper, a zero voltage transition (ZVT) interleaved high step-up converter with built-in transformer and voltage doubler for photovoltaic (PV) grid-connected generation system is proposed. The built-in transformer and the voltage doubler are employed to extend the voltage gain, reduce the switch voltage stress, which makes the low on-resistance switch can be adopted to reduce the conduction...
A high step-up converter with a coupled inductor and a switched capacitor is proposed in this paper. By using the coupled inductor, the voltage gain of the converter is extended and the voltage stress of the main switch is decreased to reduce the conduction losses. Moreover, the reverse-recovery problem of the output diode is alleviated by the leakage inductance. By using the switched capacitor, the...
This work presents a novel antenna and LNA co-design technique to increase system integration level and improve circuit performance. This design is very noise insensitive due to its low noise sensitivity factor Rn. The co-design method has great potential in customer wireless communication radio applications.
In this paper, a low power receiver utilizing a resonant transformer circuit at 20 GHz to decrease the antenna/system sizes to meet the smart dust system (SDS) millimeter size space requirement was designed. The resonator transformer generates relatively large voltages and facilitates diode-based demodulation. The receiver was designed for low power SDS applications at 20 GHz. The chip has been taped...
The effects of high salinity on the fresh culture and the acclimated culture were investigated by monitoring specific oxygen uptake rate (SOUR), specific nitrification rate (SNR) and specific denitrification rate (SDNR). It was found that the SOUR of the fresh culture decreased from 19.36 to 5.83 mg O2 /g MLVSS *h when the NaCl concentration was raised from 0 g/L to 30 g/L. The SOURs of the acclimated...
A grid-connected photovoltaic (PV) power system with the high step-up ZVT interleaved boost converter is presented in this paper. For a typical PV module, the output voltage is relatively low. So the high voltage gain is obligatory to realize the grid-connected function. The proposed PV system employs a ZVT interleaved boost converter with an active-clamp circuit as the first power processing stage,...
In purpose of solving the problems on saving energy, resisting acoustic resonance and enhancing reliability in HID lamp ballasts, this paper addresses a novel centralized HID ballast system with power-bus. The system utilizes a central converter to convert the mains voltage to a particular waveform in power-bus, and then with the power-bus, simplified ballasts can be driven in parallel. According...
A new combined ZVS converter topology is studied in this paper to meet the demands of high power density of power supplies. By interleaving two-phase-shifted full-bridge converter modules, the presented converter has many advantages such as natural sharing input-current, high voltage gain, low voltage stress of the transformer second-side diodes, small volume of input and output filters and so on...
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.