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.
This work addresses a single-stage active power factor correction (PFC) scheme that is implemented using a Floating Interleaved Boost Converter (FIBC) equipped with an indirect Double Integral Sliding Mode Controller (DISMC) adopted for a single phase full bridge rectifier. Due to the high gain, high efficiency and small size components, FIBC-based approach can achieve unit power factor and voltage-regulation...
This paper introduces a new multi-functional double mode inverter (MFDMI) scheme, which is able to operate under a variety of operational conditions for aggregation of PV-based renewable energy resources. Detecting islanded situation within a new and fast approach, regulating the voltage in the islanded mode, smooth transition between islanded and grid-tied (GT) modes, injecting both active and reactive...
In this work a bi-level (Supervisory-Local) PV-based Microgrid configuration is proposed for low power residential applications. In the supervisory level a long-term control scheme is assigned to define the set points for local controllers. The local level is mainly formed from a set of controllers which are basically responsible to control the power electronic interfaces and converters. Within the...
In this article, sliding mode controller is used to improve power factor in AC-DC boost converters. A comparison between integral sliding mode controller (ISMC) and double integral sliding mode controller (DISMC) for the current loop of the boost PFC converter is proposed in this paper. In sliding mode control method, circuit complexity is less. Also good stability and fast response versus to the...
In this article, sliding mode controller is used to improve power factor in AC-DC boost converters. A comparison between integral sliding mode controller (ISMC) and double integral sliding mode controller (DISMC) for the current loop of the boost PFC converter is proposed in this paper. In sliding mode control method, circuit complexity is less. Also good stability and fast response versus to the...
To determine the (current-voltage) characteristics for the fabricated Disks of varistors, we need to design a circuit, which can generate voltages with different Amplitudes and frequencies. This device can change the voltage and frequency automatically and linearly. We can use this device to study characteristics of the fabricated components or in QC procedures. Device gets the frequency of output...
Clustered micro calcifications (MCs) are one of the early signs of breast cancer. In this paper, we propose a new computer aided diagnosis (CAD) system for automatic detection of MCs in two steps. First, pixels corresponding to potential micro calcifications are found using a multilayer feed-forward neural network. The input of this network consists of 4 wavelet and 2 gray-level features. The output...
A fully automated method for segmentation of neonatal skull in Magnetic Resonance (MR) images for source localization of electrical/magnetic encephalography (EEG/MEG) signals is proposed. Finding the source of these signals shows the origin of an abnormality. We propose a hybrid algorithm in which a Bayesian classifying framework is combined with a Hopfield Neural Network (HNN) for neonatal skull...
In this paper the utilization of uninterruptible- power-supplies (UPS) in fuel-cell-vehicles is proposed. FCVs can take advantage of UPS for several purposes. It has been shown that fuel cell systems prefer constant load in order to operate reliably and with extended life time. At times when FCV load suddenly changes (e.g., acceleration, breaking) the condition of constant load on a fuel cell system...
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.