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.
State-of-the-art control approaches often neglect the time-variant characteristics of power-electronic systems in favour of a time-averaged approach. In consequence, the resulting system is partly instable, thus not optimally controlled. Pole-restraining control takes the introduced characteristics into account. It is named due to its main maxim-the restraining of the eigenvalue movement. In this...
Switched reluctance motor drive system becomes an attractive alternative in adjustable speed drive due to its simplicity in both motor construction and power converter, and vibration that resulting acoustic noise in switched reluctance motor have generated intense interest from the time it became commercially competitive with dc and ac drives. Focus on the magnetic noise vibration, dig the relationship...
LED has been applied in many aspects in daily life because of its advantages, and this trend will go on. Therefore, the research and design of the LED lighting driver becomes popular. In this article, system level design of a LED lighting driver based on switching power is described. The chip is designed with hysteretic control mode, and the peripheral circuit topology structure is buck converter...
Direct-drive wind power system needs a full-scale power converter to transmit the variable frequency electrical power to the grid. In order to improve the low voltage ride through (LVRT) capability, the grid-connected inverter (GCI) should work at a unity, a leading or a lagging power factor. Traditional control methods are complicated and output waveform is distorted by dead time. This paper introduces...
The converting circuit requires high performance such as the output current with high accuracy, low ripple (les0.2 %) and full-range regulated in power accumulator battery testing system for electric vehicles (EV). In this paper, a three-phase current rectifier (CSR) is taken as the main circuit. Double-loop control strategy which is base on the feedback of grid current and the output current is used,...
A high performance modular three-phase utility-interactive converter is designed and implemented in this paper. This converter has three operation modes: grid-connection inverter mode, stand-alone inverter mode and rectifier mode. Control principles and modes of every mode are analyzed in detail and the modular design method is adopted. A simple but valid control strategy is proposed. Finally a 10...
In this paper, a novel active boost converter for the SR drive is proposed. An active capacitor circuit is added in the front-end. Based on this active capacitor network, when the boost switch turns off, this network seems as a passive capacitor network. And the voltage of boost capacitor can keep balance with the DC-link voltage automatically. In the capacitor network, the discharging voltage is...
This paper presents a new soft switching bidirectional buck or boost DC-DC converter. Compared to the traditional bidirectional DC-DC converter, the new topology can be used as a buck converter or a boost converter in bidirectional cases for Hybrid Electric Vehicles (HEV) and Electrosorb Technology (EST) etc. This new converter has the advantages of simple circuit and control strategy, soft-switching...
In this paper, a novel power converter for four phase switch reluctance motor was proposed based on double IPMS which has the advantages of high integration and stabilization compared to the traditional power converter circuit. The drive circuit, buffer circuit, protective circuit for the power converter was designed and experimented. Based on TI-DSP2407, the drive system for a 3KW prototype motor...
It is popular that several photovoltaic modules connected in series used the same centralized inverter to transfer the energy to the grid. Nowadays, module integrated converters (MIC) are preferred because they can improve the efficiency of PV module even when some of the modules of the total surface are covered and do not receive the same solar irradiation. But MIC needs big capacitor to reduce the...
This paper presents switched reluctance motor (SRM) torque ripple minimization based on the modified multi-level converter. The TSF control has a low torque ripple, good dynamic performance and high efficiency. And the proposed modified multi-level converter has low cost and high performance. For integrated advantages of the TSF method and the proposed modified multi-level converter, a suitable control...
This paper proposes an input-paralleled output-paralleled half-bridge converter based on single half-bridge converter, which is very suitable for the low output voltage and large output current application. All modules share a common capacitor-leg, that can reduce the number of main circuitpsilas capacitors and make topology simple. The traits and rules of combination converter are introduced and...
With the development of superconductive technology of high temperature, multilevel current source converter (CSC) will be widely used in power system. The selected harmonic elimination pulse width modulation (SHEPWM) technique for multilevel CSC is presented in this paper. Simulation results prove the advantages of the method such as low switching frequency, high output current quality, high output...
Previous publications revealed that system stability was degraded due to the delay of computational time and the conversion time of A/D converter. It could induce system oscillation and even system stability could be destroyed. Predictive results of conventional current state observer were not ideal because that it was open loop in essence. To alleviate this problem, a method based on new state observer...
This paper proposes the digital charge control method to boost converter operating with a type of nonlinear load, the constant power load. The constant power load is modeled theoretically, and model parameters are given in detail. Transfer functions of the boost converter with constant power load are deduced, and a small-signal model of the charge controlled current inner loop is presented. The digital...
In this paper, a comparative study of modified phase-angle, extinction-angle, and pulse width modulation control techniques for the purpose of power factor improvement of single-phase AC-AC voltage regulators have been illustrated as applied to a single-phase AC voltage converter by an example of the widely used single-phase induction motor as a dynamic load. Observations on power factor, displacement...
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.