China
Africa
Explore chapters and articles related to this topic
AC–DC Boost Converter Control for Power Quality Mitigation
Published in L. Ashok Kumar, S. Albert Alexander, Computational Paradigm Techniques for Enhancing Electric Power Quality, 2018
L. Ashok Kumar, S. Albert Alexander
The dual-boost PFC converter is often called the bridgeless PFC converter. Conventional-boost PFC converters are composed of a full-bridge AC to DC diode rectifier followed by a boost converter. The bridge rectifier suffers from high conduction losses, which lowers the system efficiency. A rectifier with the boost PFC topology has been analyzed. The power processors usually consist of some power conversion stages where the operation of these stages is decoupled on an instantaneous basis by means of energy storage elements such as capacitors and inductors. Therefore, the instantaneous power input does not have the equal instantaneous power output. Thus, a converter is a basic module of power electronic systems. It utilizes power semiconductor devices controlled by signal electronics and possibly energy storage elements such as inductors and capacitors.
Diode Rectifiers and Filters
Published in Muhammad H. Rashid, Ahmad Hemami, Electricity and Electronics for Renewable Energy Technology, 2017
A bridge rectifier is similar to having two full-wave rectifiers together to obtain the full voltage of the source in the output instead of half. In addition to the voltage relationship, another advantage is, thus, no need for a center tap point. It uses four diodes as shown in Figure 16.4. Pay attention to the way the four diodes are connected together and to the circuit. At each half cycle, two of the diodes conduct and two of them block the current. The resulting rectified waveform, as seen by a load, is similar to those shown for full-wave rectifier, with the exception that the voltage this time is double of that with a full-wave rectifier, all conditions being the same. Figure 16.4 shows the direction of current for one half cycle. Note that we have used the common way for showing electronic circuits; thus, the current path is completed through the ground.
Signal Characteristics
Published in Kevin Robinson, Practical Audio Electronics, 2020
Rectification is a common process in electronics. Indeed another name for a diode is a rectifier because this is pretty much exactly what a diode does. One diode on its own easily achieves half wave rectification while full wave rectification is simply implemented using four diodes in a configuration called a bridge rectifier. The details and applications of these circuits are fully addressed in Chapter 16 on diodes. Rectification is often utilised in distortion and octave up effects due to the nature of the harmonic distortion this kind of processing adds to a signal. It is also a key stage in the operation of a standard linear power supply, converting an AC signal into a DC one. This application is examined in Chapter 16.
Single-phase front-end bridgeless modified Landsman-Canonical Switching Cell PFC converter for arc welding applications
Published in Automatika, 2023
Nowadays, many industries broadly use arc welding power supplies. Attributable to high efficiency are becoming main stream in various low and medium power applications. Among these previous developments different alloys are used for lower production cost, higher electrical conductivity and good mechanical properties. It made the researchers to design simplified AC-DC converters with modest size and cost. Good arc welding process ensures good weld seam quality and posses quick response [1–4]. Traditional, AC–DC converter usually includes the bridge rectifier circuit and a large capacitor to attain DC voltage. This converter unavoidably presents a high source current distortion, bringing about an enormous measure of low-power quality. The attractive features of this front-end PFC converter topology find their application in arc welding. The merits of this converter include good power quality, high PF, and low inrush current under different load conditions. Moreover, the PQ indices of the PFC converter meet the specifications of an International Standard IEC 61000-3-2 [2–5]. Numerous converters for arc welding power supplies were compared on the basis of the aforementioned attributes and are reported in the literature [1–5].
A novel design of switched boost action based multiport converter using dsPIC controller for renewable energy applications
Published in Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2022
Senthil Kumar Ramu, Suresh Paramasivam, Suresh Muthusamy, Hitesh Panchal, Kishor Kumar Sadasivuni, Younes Noorollahi
The proposed converter’s results are examined using a Digital Storage Oscilloscope (DSO). The MOSFET switching pulse is generated by the dsPIC controller. The results obtained from the proposed MPC when it was performed under CCM at full load. The input voltage of the converter is represented in Figure 8. It shows the straight line at 12 V in y-axis (1 Div. = 5 V). The input voltage of 12 V is obtained from diode bridge rectifier and filter. The feedback signals are processed by DsPIC, controller which provides the regulated duty cycles for the converter to perform in a certain condition. Here, a single source of power is delivering to the load, and the increased output indicates that the uniform voltage in renewable applications. The results were obtained during the steady-state operation of the proposed converter in order to evaluate its voltage balancing capacity. It shows that proposed MPC can balance the DC voltage level with both balanced and unbalanced loads. The filter capacitor stabilizes and smooths the DC voltage which induced by diode bridge rectifier. After finding the input voltage, it can be offered to MOSFET terminals for gate triggering purpose.