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DC Circuit Analysis and Basic Electronic Devices
Published in S. Bobby Rauf, Electrical Engineering for Non-Electrical Engineers, 2021
Common full wave rectifier is a circuit consisting of four diodes and a resistor. See Figure 2.7. The sinusoidal AC waveform applied to the input side of the four diode bridge and resistor circuit is shown in Figure 2.7(a). The four diode bridge configuration shown in Figure 2.7(b) is the essential power conversion segment of the overall full wave bridge rectifier circuit. When AC voltage is applied between terminals A and B on the input side of the diode bridge, as Vin, the positive crest of the sinusoidal waveform drives current through terminal A, diode CR1, resistor R, diode CR4 to terminal B. During this positive crest initiated flow of current, diodes CR1 and CR4 are forward biased. As the current assumes this course, it “drops” a positive “half” wave across the resistor, or terminals C and D. This positive DC crest is the first crest from the left, in Figure 2.7(c). During the positive half of the AC cycle, diodes CR2 and CR3 are reverse biased; therefore, they do not conduct, and no current flows through the CR2, R and CR3 path.
A novel centralized supervisory with distributed control system-based microgrid
Published in Automatika, 2022
The following power electronic converters were used in the prototype of the microgrid that has been used to validate the proposed ideas. The boost converter for the SPV system.The buck converter to charge the battery.The boost converter for the fuel cell.The diode bridge rectifier for the PMSG.The boost converter for the PMSG.The three-phase inverter for the PMSG.The bidirectional DC/AC converter.
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.
Design and analysis of an integrated LC3–Valley fill passive LED driver
Published in International Journal of Electronics, 2018
Devi Venkatesh, Sreedevi Vellithiruthy Thazhathu
The proposed integrated LC3–Valley fill LED driver circuit is shown in Figure 3. The first part is LC3 circuit, which consists of input inductance, with three capacitances, , and arranged in П model. The purpose of LC3 is to achieve less THD and high PF using the LC parallel resonance. The input inductance, along with its internal resistance, is arranged in parallel to the capacitance, as shown in Figure 3. This forms a parallel resonant circuit in the input side. The capacitor, at the input is used for power factor improvement. The diode bridge rectifier is responsible for harmonic currents. The impedance of the LC resonant circuit increases at harmonic frequency components such that the input harmonic current is mitigated. The voltage, is the output of the LC3 circuit and is the input to the rectifier. The rectifier is followed by the Valley fill circuit.