Best Power Electronics Projects both Hardware and simulation
This project describes the speed control of BLDC motor with the dsPIC30F4011 Digital Signal Controller. By using the Hall effect sensors of BLDC Motor, the dsPIC30F4011 controller generates the controlled switching pulses for inverter. The speed control is done by changing the duty cycle of PWM from dsPIC30F4011. The motor speed is measured by using the proximity sensor placed on the BLDC Motor and displayed on LCD.
This power electronics project describes the speed control of Induction motor with the FPGA Digital Signal Controller. By comparing the sine and triangular wave (internal) ,FPGA generates the controlled switching pulses for inverter. The speed control is done by changing the frequency of reference sine from FPGA. The motor speed is measured by using the proximity sensor placed on the Induction Motor and displayed on LCD.
Improved Interleaved High Step-up Converter with High Efficiency for Renewable Energy Applications
The proposed converter consists of switched capacitors and two coupled inductors. This combination can provide a relatively high voltage boost gain while operating with small duty cycle. The converter can be powered either by one individual DC voltage source in an interleaved manner or two independent DC voltage sources as a multiport converter. The configuration of the proposed converter has advantages such as low power losses, longer lifetime of input sources due to non-pulsating input current, low voltage stress across the main switches and slight output voltage fluctuation.
Double-Frequency Buck Converter
A double-frequency buck converter is comprised of two buck cells: one works at high frequency, and another works at low frequency. It operates in a way that current in the high-frequency switch is diverted through the low-frequency switch. Thus, the converter can operate at very high frequency without adding extra control circuits. Moreover, the switching loss of the converter remains small. The proposed converter exhibits improved steady state and transient responses with low switching loss.
Isolated Bidirectional Full-Bridge DC–DC Converter With a Flyback Snubber
An isolated bidirectional full-bridge dc–dc converter with high conversion ratio, high output power, and soft start-up capability is proposed in this paper. The use of a capacitor, a diode, and a flyback converter can clamp the voltage spike caused by the current difference between the current-fed inductor and leakage inductance of the isolation transformer, and can reduce the current flowing through the active switches at the current-fed side. Operational principle of the proposed converter is first described,
and then, the design equation is derived.
Analysis of Modulation Strategy for the Minimization of Leakage Current in the PV
This Power electronics projects presents a pulse width modulation (PWM) technique for the minimization of leakage current in the grid connected/ stand-alone transformer-less Photo-Voltaic (PV) Cascaded Multi-Level Inverter (CMLI). The proposed PWM technique is integrated with MPPT algorithm and is applied to the five-level CMLI. Further, using the proposed PWM technique the high frequency voltage transitions in the terminal and common mode voltages are minimized. Thus, the proposed PWM technique minimizes the leakage current of the PV array and EMI filter requirement in the system without addition of any extra switches. Further, this paper also presents the analysis for the terminal voltage across the PV array and common mode voltage of the inverter based on switching function. Using the given analysis the effect of PWM technique can be analyzed, as it directly links the switching function with the common mode voltage and leakage current. Also, the proposed PWM technique requires reduced number of carrier waves compared to the conventional sinusoidal pulse width modulation technique (SPWM) for the given CMLI.
Full-Range Soft-Switching Buck-Boost
A new method for deriving isolated Buck-Boost (IBB) converter with single-stage power conversion is proposed in this paper, and novel IBB converters based on high-frequency bridgeless interleaved Boost rectifiers are presented. The semiconductors, conduction losses and switching losses are reduced significantly by integrating the interleaved Boost converters into the full-bridge diode-rectifier. Various high-frequency bridgeless Boost rectifiers are harvested.Based on different types of interleaved Boost converters, including conventional Boost converter and high step-up Boost converters with voltage multiplier and coupled inductor. The full-bridge IBB converter with voltage multiplier.
Three Level DC-DC Boost Converter Closed loop
This Power electronics projects present three level DC-DC boost converter topology for high conversion ratio. is a combination of boost topology with voltage multiplier. The Traditional boost converter is unable to provide high gain ratio since it has high voltage stress and high duty cycle, hence the three level DC-DC boost converter is used which gives the reliable high conversion ratio. The main advantage of proposed topology is output voltage can be increased by using the combination of capacitors and diodes at output side of the converter, without altering main circuit. Proposed circuit is used for high power application with severe duty cycle. The proposed three level dc-dc boost converter topology consists of 5 capacitors, 7 diodes, 2 inductors and a switch.
Average Absolute Frequency Deviation Value Based Active Is-landing Detection Technique
The inverter’s classical q-axis current controller is modeled with a continuous periodic reference current of a small value. During the loss of mains, the island’s frequency deviates with respect to the variation in the reference current; this is detected by making the use of an average absolute frequency deviation value. In case of a stable island formation, there is a small periodic frequency deviation owing to the small value of the periodic reference current, and the frequency deviation is so small that it falls inside the non detection zone (NDZ) of the frequency relay. In case of non islanding switching events, which may transiently impose a significant deviation in the frequency, the possibility of false detection is eliminated by reconfirming the occurrence of islanding once it is suspected. The reference current is kept to a small value to limit the degradation of the power quality and the power factor. Computer simulation is done with MATLAB.
Improved MPPT method for rapidly changing Environmental conditions
A well-known limitation of the Perturb and Observe (P&O) MPPT method is that it can get confused and track in wrong direction during rapidly changing irradiation.The present work offers a simple and effective solution to this problem, by using an additional measurement of the solar arrays power in the middle of the MPPT sampling period. The method has been experimentally tested and compared with the traditional P&O method.
Fuzzy Logic Control of DC-DC Buck Converter
- The design of fuzzy controllers does not require an exact mathematical model. Instead they are designed based on general knowledge of the plant.
- In this power electronics project , a fuzzy logic controller for a dc-dc buck converter is designed. The designed controlled system is simulated in MATLAB/Simulink software.
- Different parameters such as input voltage and output load are varied and the responses of fuzzy controller to these variations have been studied and investigated in order to evaluate the designed controller performance. The simulation results are presented
A Robust Adaptive Controller for a DFIG Wind Turbine with Grid Voltage & Frequency Support
This project proposes the design and implementation of a novel adaptive non-linear control for a doubly fed induction generator (DFIG) to provide support to power system operation. The controller is an adaptive voltage and speed regulator which guarantees that the active power and reactive power delivered by the generator are automatically adjusted to support the grid when a change occurs. Simulation results are implemented by using Matlab Simulation.
Isolated High Step-Up DC–DC Converter With Low Voltage Stress
Fuel cell stacks and photovoltaic panels generate rather low dc voltages and these voltages need to be boosted before converted to ac voltage. herefore, high step-up ratio dc– dc converters are preferred in renewable energy systems. A new Z-source-based topology that can boost the input voltage to desired levels with low duty ratios is proposed in this paper. The
topology utilizes coupled inductor. The leakage inductance energy can efficiently be discharged. Since the device stresses are low in this topology, low-voltage MOSFETs with small RDS(on) values can be selected to reduce the conduction loss. These features improve the converter efficiency. Also, the converter has a galvanic isolation between source and load. The operating principles and steady-state analysis of continuous and discontinuous conduction modes are discussed in detail. Finally, experimental results are given for a prototype converter that converts 25 V dc to 400 V dc at various power levels with over 90% efficiency to verify the
effectiveness of the theoretical analysis.
High-Gain Single-Stage Boosting Inverter for Photovoltaic Applications
This paper introduces a high-gain single-stage boosting inverter (SSBI) for alternative energy generation. As compared to the traditional two-stage approach, the SSBI has a simpler topology and a lower component count. One cycle control was employed to generate ac voltage output.. The experimental results reveal that the proposed SSBI can achieve high dc input voltage boosting, good dc–ac power decoupling, good quality of ac output waveform, and good conversion efficiency.
An Improved Interleaved High Power Flyback
Inverter for Photo voltaic Application
The various renewable sources, Solar power is reliable and more efficient. This paper presents analysis of an isolated grid-connected inverter for photovoltaic applications based on interleaved fly back converter topology which operating in discontinuous current mode. The interleaved structure is best solution to increase the power level, which minimize the current ripple, can reduce the passive component size. The efficiency, total harmonic distortion of current by grid and the power factor are measured as 90.16%, 4.42%, and 0.998, respectively.