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Published in Pooja Mohindru, Pankaj Mohindru, Electronic Circuit Analysis using LTspice XVII Simulator, 2021
Pooja Mohindru, Pankaj Mohindru
A bridge-wave rectifier is a full-wave rectifier that uses four diodes in a bridge circuit configuration to efficiently convert an AC into a unidirectional current (pulsating DC). A capacitor connected across a rectified output allows an AC signal to pass through it and blocks a DC signal, thereby acting as a high-pass filter. Thus, AC ripples in a DC output voltage get bypassed through a parallel capacitor circuit, and a pure DC voltage is obtained across a load resistor.
Direct Current Power Systems
Published in Dale R. Patrick, Stephen W. Fardo, Brian W. Fardo, Electrical Power Systems Technology, 2021
Dale R. Patrick, Stephen W. Fardo, Brian W. Fardo
The full-wave rectifier utilizes a center-tapped transformer to transfer AC source voltage to the diode rectifier circuit. During the positive half cycle of AC source voltage, the instantaneous charges on the transformer secondary are as shown in Figure 7-21. The peak voltage (Vmax) is developed across each half of the transformer secondary. At this time, diode D1 is forward biased, and diode D2 is reverse biased. Therefore, conduction occurs from the center-tap, through the load device, through D1, and back to the outer terminal of the transformer secondary. The positive half cycle is developed across the load, as shown.
Direct Current Power Systems
Published in Stephen W. Fardo, Dale R. Patrick, Electrical Power Systems Technology, 2020
Stephen W. Fardo, Dale R. Patrick
The full-wave rectifier utilizes a center-tapped transformer to transfer AC source voltage to the diode rectifier circuit. During the positive half cycle of AC source voltage, the instantaneous charges on the transformer secondary are as shown in Figure 7-21. The peak voltage (Vmax) is developed across each half of the transformer secondary. At this time, diode D1 is forward biased, and diode D2 is reverse biased. Therefore, conduction occurs from the center-tap, through the load device, through D1, and back to the outer terminal of the transformer secondary. The positive half cycle is developed across the load, as shown.
A triple band rectenna for RF energy harvesting in smart city applications
Published in International Journal of Electronics, 2023
Daasari Surender, Ahsan Halimi, Taimoor Khan, Fazal A. Talukdar, Yahia M.M. Antar
A rectifier is another essential circuit in the rectenna system, which is used to transform the received RF energy into the direct current (DC). The diode plays a significant role in the conversion process, hence the selection of a suitable diode in the rectifier circuit is highly desirable. Since the RF power density in the surrounding atmosphere is low, thus the diode having a low threshold voltage is required at a low input power level. The performance of any rectifier circuit primarily relies on the selection of an appropriate diode model and the rectifier topology. The Schottky diode was found to be appropriate due to its advantages over conventional diodes at high-frequency energy levels. Various frequently used Schottky diode models are SMS7630, HSMS28xx family, MA4E1317 (Daasari et al. (2020). Among all, an SMS7630 diode has a low threshold voltage and is highly sensitive at very low RF power levels, hence an SMS7630 diode is chosen to design the proposed rectifier circuit. Besides, a suitable rectifier topology enhances the power conversion efficiency (PCE) and output voltage across the output load terminals. Various rectifier topologies used are single diode, voltage doubler, full-wave bridge, Greinacher configurations. A single diode rectifier topology has been chosen for the proposed rectifier design due to the low turn-on voltage required, and losses associated with the diode are low.
Decision-Making approach for evaluating suitable hybrid renewable energy system for SMEs in Ghana
Published in International Journal of Ambient Energy, 2022
Flavio Odoi-Yorke, Nicholas Abofra, Francis Kemausuor
HOMER calculates the bank lifetime using Equation 5 (Adaramola et al. 2017): where, BLbatt denotes battery bank lifetime (yrs), Xb denotes battery quantity, Qls denotes single battery lifetime throughput, Qthpt denotes annual battery throughput, and Sfl denotes battery float life. Table 2 shows the battery technical specification. The battery capital cost is 220 USD/kWh, installation inclusive, as shown in Figure 6. The battery replacement and O&M costs are 200 and 4 USD/kWh/yr. The converter has two units, namely, inversion and rectification. An inverter converts DC electricity into AC in the inversion unit. Likewise, a rectifier converts AC into DC electricity in the rectification unit. The converter capital cost in Ghana is about 325 USD/kW (AIMS Power 2020; SUKA 2020). The converter replacement and O&M costs are taken to 300 and 4 USD/kW/yr. Table 3 provides a detailed breakdown of all of the component costs for simulation.
Analytical comparison and implementation of different inverter topologies for three-phase on-line uninterruptible power supply
Published in International Journal of Ambient Energy, 2022
To extend voltage adjustability, the proposed three-phase on-line UPS with SLZSI employs a unique Switched Inductor (SL) impedance network to couple the inverter main circuit and the power source. Compared with the conventional ZSI, the proposed inverter increases the voltage boost ability considerably. A very short shoot-through zero state is required to obtain a high voltage boost, so the output voltage and current waveform distortions are reduced. The voltage stress of the proposed UPS with SLZSI is also minimised. The switched inductor concept is combined with ZSI and a proposed SLZSI is suggested for three-phase on-line UPS which is shown in Figure 8. This proposed topology can operate in two operating modes. In the normal mode, the AC main supplies the power to the load through the SLZSI. The rectifier converts the AC voltage into DC voltage, which charges the battery. During backup mode, AC main is not available and the battery supplies the load through the SLZSI. When compared to the conventional ZSI, six diodes and two inductors are additionally added in the proposed SLZSI based UPS.