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.
The controller of a Conventional Unity Power factor correction (PFC) rectifier needs three feedback signals sensed from the converter, i.e., rectified input voltage, output voltage and input inductor current. Inductor current is sensed using current sensors, which are often expensive. Eliminating current sensors in PFC circuits is a subject of research interest. This paper gives a novel technique...
Increased size and capacity of individual wind turbine has posed a major challenge for high power conversions. For this scenario advanced multilevel converter topologies and parallel operation of Active Front End (AFE) rectifiers are gaining popularity. But there are issues on reliability and complicacy of control and operation of active power electronic devices at such high power. The Passive Front...
This paper presents a comparative analysis of direct power control (DPC) and direct power control with space vector modulation (DPC-SVM) of three phase PWM rectifier. In the first strategy has been developed to control the instantaneous active and reactive power directly by selecting the optimum switching state of the PWM rectifier. The main of this strategy is the improve the power factor and the...
High-current low-voltage (HCLV) rectifiers are used in the telecom industries, electroplating and induction heating system. Typical power rating of these rectifiers varies from tens of kW to hundreds of MW. In this paper, a three-phase three-level boost type PWM rectifier is proposed as an active front-end PFC scheme for telecom load. The proposed active front-end PFC converter is modeled by switching...
A single phase two switch SEPIC output regulated rectifier is proposed in this paper. The proposed AC-DC converter has power factor correction and input current shaping facility. The rectifier produces buck-boost voltage/current gain. Taking advantage of this characteristic the design of the proposed two switch rectifier has been made separately to operate as buck converter and boost converter. A...
DC power conditioning and processing is an essential challenge now a days. Rectifiers having bridge structures are considered to be nonlinear as they draw non sinusoidal current from line. This distorted current causes several problems related to power quality. In this paper, a new configuration of single phase single switch controlled rectifier using SEPIC topology is proposed. The input current...
By utilizing one coupled inductor and two auxiliary diodes, the bridgeless boost rectifier has a lower conduction loss and no diode reverse recovery problem. Detailed analysis of the novel boost rectifier is presented in this paper. The experimental results of a 300W prototype was analyzed and the excellent performance of the bridgeless boost rectifier was also shown. Dual Boost PFC brings higher...
This paper proposes input-parallel output-parallel (IPOP) three-level (TL) DC/DC converters with the interleaving control strategy, which is composed with two four-switch half-bridge TL (HBTL) DC/DC converters featuring with simple and compact circuit structures. Due to the IPOP structure, the component current stresses in the proposed converters are reduced. More significantly, the combination of...
Diode based bridge rectifiers (AC to DC power converters) are the widely used power supplies. The major drawbacks of the conventional diode bridge rectifiers and thyristor-based rectifiers (nonlinear loads) are low power factor and high current harmonics in AC supply. This paper presents the design of a digital controller for continuous conduction mode boost converter with power factor correction...
A new topology of single-phase SEPIC (Single Ended Primary Inductor Converter) AC-DC converter with low input current THD and high input power factor is proposed. Instead of using a single phase rectifier followed by a boost DC-DC converter, or using a bridge rectifier with two diodes and two switches, the rectifier's input is chopped at high frequency during positive and negative cycles by a single...
This paper introduces a bidirectional isolated AC/DC converter for storage battery application with current space vector pulse width modulation (SVPWM) method. The converter characterizes high power factor, wide output voltage range, bidirectional power flow and galvanic isolation. Resonant reset is used to demagnetize the transformers for simplicity. The operation principle of the converter is presented...
In this work, a novel voltage sensorless Direct Power Control (DPC) approach of Active Front End (AFE) rectifier based on virtual flux and dc-link dynamic reference design technique is presented. Firstly, the PI controller is eliminated from the outer dc-link voltage control loop with the application of dynamic dc-link reference design technique and line voltage sensors by using virtual flux technique...
This paper presents simple control of a variable speed stand-alone wind turbine with a permanent magnet synchronous generator (PMSG) to get constant voltage. The system consists of a wind turbine, PMSG, un-controlled rectifier and voltage source inverter using PI control. The parameters of PI control are calculated by using try and error method. The system is modified by using a switch mode rectifier...
Pulse Width Modulated (PWM) rectifiers play an important role in power conversion systems. However, open-switch faults are one of the main problems that face the operation of a PWM rectifier and its reliability. In this paper, open-switch faults in three-phase current controlled PWM rectifiers are analysed. The Space Vector Modulation (SVM) based Hysteresis Current Control (HCC) scheme is considered...
Although switched-mode Electronic Loads (E-Loads) are commonly used in different applications, they are facing particular limitations especially for higher frequency purposes. While increasing the switching frequency in switched-mode E-Loads enables them to operate at high frequencies, simply rising the switching frequency might not be an efficient approach in terms of design issues, device limitations,...
In this paper, an architecture of a single-stage power factor corrected AC-DC converter controlled by a high voltage resonant controller IC L6598 is proposed as LED street lighting driver. The converter is formed by the integration of two boundary conduction mode (BCM) boost circuits and a half-bridge LLC resonant circuit. The converter adapts dual half-wave rectifiers at the output side that supply...
Modular Multilevel Converter is a widely accepted technology for HVDC applications. It consists of several sub-modules or cells connected in cascade. These are bidirectional chopper cells and each one of them has a floating capacitor. This paper discusses the modulation and voltage balancing strategies which are essential for the converter to work as rectifier or inverter. The discussion is followed...
This paper proposes a carrier-based pulse width modulation (CB-PWM) method with synchronous switching technique for a Vienna rectifier. In this paper, a Vienna rectifier is one of the 3-level converter topologies. It is similar to a 3-level T-type topology the used back-to-back switches. When CB-PWM switching method is used, a Vienna rectifier is operated with six PWM signals. On the other hand, when...
Electric Vehicle (EV) has come into attention within automotive industry over the years. The feature of EV that uses electric as primary source provides benefits to customers. As electrical system is the major appeal of an EV, the present study focuses on the charging system where it involves DC-DC converter for high voltage charger. The phase-shifted-full bridge and LLC are used in high power application...
In this study, a series resonant converter is designed in order to improve power generation capability of surface mounted permanent magnet generator over a wide speed range while considering the current limits of the machine. A simple and mostly accurate design approach for the series resonant converter has been developed by considering the dynamic characteristics of the surface mounted permanent...
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.