IEEE Projects Trichy, Best IEEE Project Centre Chennai, Final Year Projects in Trichy – We Provide IEEE projects 2018 – 2019 , IEEE 2018 Java Projects for M. Tech, IEEE 2018 Dot net Projects for B. Hence, the CSI-fed ac machine has a second-order system in the continuous time domain. This paper presents a design methodology for the closed-loop current controller of the CSI-fed torque ripple reduction of brushless DC motor based on adaptive input-output feedback linearization machine drive system.
Only part of the load power is processed by the active switches, reducing the peak current through the switches to half of the load current, as higher power levels can then be achieved by the proposed topology. The volume of reactive elements, i. Abstract—Anovel high step-up converter is proposed for a frontend photovoltaic system. Through a voltage multiplier module, an asymmetrical interleaved high step-up converter obtains high stepup gain without operating at an extreme duty ratio. The voltage multiplier module is composed of a conventional boost converter and coupled inductors.
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The classical SPWM method is quite effective in controlling the RMS magnitude of the UPS output voltages. Depending on the output power rating, the power stage to drive an LED can be classified into single-stage and two-stage structures. The single-stage structure is for low-power LED lighting applications. 70 W of output power because of its low efficiency and huge transformer at high power. DC interface allows for the improvement of system efficiency by fully utilizing dc-based renewable sources and storage devices.
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In this paper,issues on PV interface for dc distribution systems are discussed for energy-efficient and reliable system implementation. AC and dc PV interfaces are mathematically analyzed. Abstract—This paper proposes a pulse-width modulation threelevel converter with reduced filter size using two transformers. The proposed converter hasmany advantages. All switches sustain only the half of the input voltage and since the secondary rectified voltage is a three-level waveform, the output filter inductor can be reduced.
Also, because of the power sharing of transformer and reduced output inductor, high efficiency can be obtained. PV voltage regulation is fundamental in order to both maximize and limit the power. For this purpose, a large input capacitor has traditionally been used. However, when reducing that capacitor’s size, the nonlinearities of the PV array make the performance of the voltage regulation become highly dependent on the operating point. Abstract—A primary-side controlled method is commonly used in flyback LED driver to regulate output current by employing an auxiliary winding.
However, owing to intrinsic propagation delay in real-world circuits, a primary-side controlled flyback converter experiences a worse line regulation. The BCM and DCM control strategies are investigated for the interleaved flyback microinverter concentrating on the loss analysis under different load conditions. These two control strategies have different impact on the loss distribution and thus the efficiency of the flyback microinverter. HVDC transmission may be an option to harvest offshore wind energy. By integrating two boost inductors into one magnetic core, not only the circuit volume is reduced, but also the operating frequency of the core is double of the switching frequency. Abstract—Power transformer is one of the most complex parts of power converters. The complicated behavior of the transformer is usually neglected in the power converter analysis and a simple model is mostly used to analyze the converter.
This paper presents a precise analysis of a fifth-order resonant converter which has incorporated the resonant circuit into the transformer. The proposed converter attains clamping of the device voltage by secondary modulation, thus eliminating the need of snubber or active-clamp. The DAEF control technique is concurrently implemented with a digital controller of a grid-tied photovoltaic microinverter. A brief description of the microinverter architecture and its inverter circuit is illustrated. The inverter stability is investigated using the overall transfer function. Fundamentally, the conversion efficiency from dc to ac power of an inverter is important. PV modules is more important than the conversion efficiency.
In this paper, a new control method for a three-level inverter is proposed. We aim at investigating the optimal supercapacitors-battery combination versus the SCs cost. To solve this problem, a bridgeless SEPIC converter with ripple-free input current is proposed. In the proposed converter, the input bridge diode is removed and the conduction loss is reduced. Abstract—Inverters with high-output voltage gain usually face the problem of high-input current flowing through their components. The problem might further be exaggerated if the inverters use high-frequency magnetic devices like transformers or coupled inductors. Leakage inductances of these devices must strictly be small to prevent overvoltages caused by switching of their winding currents.
All of these advantages are due to its heating process, where the pot is directly heated by the induced currents generatedwith a varyingmagnetic field. As a result, the glass where the pot is supported is not directly heated and, consequently, efficiency and heating times are improved. CMV peaks are produced by the zero states in most of the cases. Abstract—Unbalanced grid voltage causes a large second-order harmonic current in the dc-link capacitors as well as dc-voltage fluctuation, which potentially will degrade the lifespan and reliability of the capacitors in voltage source converters.
Simulink are proposed, and the integrated monitoring EMS is implemented with LabVIEW. To improve the life cycle of the battery, fuzzy control manages the desired state of charge. Abstract—This paper introduces a designmethodology for a resonant boost converter topology that is suitable for operation at very high frequencies. The topology we examine features a low parts count and fast transient response, but suffers from higher device stresses compared to other topologies that use a larger number of passive components. The optimal switching frequency as well as the optimal values and types of the PV inverter components is calculated such that the PV inverter LCOE generated during the PV system lifetime period is minimized. Its structure integrates coupled inductor and switched capacitor technologies to realize high step-up voltage gain. The leakage inductance energy of the coupled inductor can be recycled to reduce voltage stress and power losses.
This dc distribution system is connected to ac grid via a bidirectional inverter. Two PV strings and two MPPTs are implemented in this system. The proposed MPPT topology consists of buck and boost converters to deal with wide output voltage range of PV panels. From the PFC converter model and the fact that a type-II compensator is used, a design methodology to maximize the bandwidth of the feedback controller is suggested.
Abstract—Alternative energy sources have for some time attracted great interest in the area of static converter development. This fact is related in greater part to issues such as sustainability and detrimental effects on the natural environment, which all contribute to the viability of this type of energy source. Abstract—This paper presents an electric equivalent model applied to induction electrodeless fluorescent lamps. The model is based on passive components and takes into account the real and reactive lamp power.
The presented model and its obtention methodology will be an important tool for ballast designers. The behaviors of the DFIG system with SGSC during network unbalance are described. Abstract—Traditional voltage-source inverter is limited by its only voltage step-down operation, while current-source inverter is limited by its only current step-down mode. In order to add an extra boosting flexibility while keeping the number of active semiconductors unchanged, voltage-type and current-type Z-source inverters were earlier proposed.
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These new classes of inverters are generally more robust and less sensitive to electromagnetic noises. The proposed system is able to meet utilities regulations, IEEE and IEC standards. The proposed converter utilizes a hybrid transformer to transfer the inductive and capacitive energy simultaneously, achieving a high boost ratio with a smaller sized magnetic component. DC-biased sinusoidal or square-wave LED drivingcurrent can help to reduce the power imbalance between ac input and dc output. In doing so, film capacitors can be adopted to improve LED driver’s lifetime. Abstract—Due to their high reliability and luminous efficacy, high-brightness light-emitting diodes are being widely used in lighting applications, and therefore, their power supplies are required to have also high reliability and efficiency.
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The proposed converter can boost the voltage of a low-voltage input power source to a controllable high-voltage dc bus and middle-voltage output terminals. The technique includes primarily the hybridizing of constant-on, constantoff, and fixed-frequency control depending only on the required duty cycle. Abstract—Various applications, like in underground mines and oil and gas industries, require remote operation of vectorcontrolled medium-voltage variable speed drives via a long motor feeder. The use of voltage source inverters in such cases leads to motor overvoltage and harmonic quality problems. Abstract—This paper deals with a new family of high boost voltage inverters that improve upon the conventional trans-Z-source and trans-quasi-Z-source inverters. The improved trans-Z-source inverter provides continuous input current and a higher boost voltage inversion capability.
In addition, the improved inverter can suppress resonant current at startup, which might destroy the device. The instantaneous variation rates of active and reactive powers, by applying each converter voltage vector in 12 different sectors, are deduced and analyzed. The DM noise spectra are calculated based on the mathematicalmodel of EMI receiver and the required corner frequencies of DM filter are obtained. In a dc-distribution system, a bidirectional inverter is required to control the power flow between dc bus and ac grid, and to regulate the dc bus to a certain range of voltages. Abstract—An interleaved boundary conduction mode powerfactor- correction buck converter that maintains high efficiency across entire load and line range is proposed. PFC stage cannot be switched OFF separately to save power losses.
Ideally, this topology will not inject any lower order harmonics into the grid due to high-frequency pulse width modulation operation. Abstract—DChybrid power systems are of interest for future low emission, fuel-efficient vessels. In spite of the advantages they offer onboard a ship, they result in a complex, interconnected system, which requires effective analysis tools to enable a full realization of the advantages. Modeling and simulation are essential tools to facilitate design, analysis, and optimization of the system.
PV source under partial shading and to deliver all that power to the load. Abstract—This paper proposes amodel of the mutual impedance between ring-type coils used in domestic induction hobs. Recent developments in these appliances have focused on flexible cooking surfaces, including adjustable-size or total-active surfaces. Flexible cooking surfaces are implemented by means of several small ring-type closely arranged coils, each one supplied by a resonant inverter. The control of the VSC is normally achieved by an outer voltage feedback loop and a sinusoidal pulsewidth-modulated inner current loop.
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Abstract—This paper presents a novel power conversion topology for systems, which include a boost and bidirectional converters to control the power flows between sources, batteries, and ultracapacitors. PV module to enable module-wise maximum power extraction. Besides, the adaptive control of the minimum off time by the proposed inhibit time control can improve efficiency even at lowac input voltage. First, the electromagnetic torque ripple is reduced in commutation and conduction regions. In the former region, the ripple is suppressed by overlapping commutation control and optimizing the duty ratio of the active controller. The implementation of the proposed vector-controlled TPIM is simple compared to the vectorcontrolled SPIM.
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In the proposed converter, two half-bridge modules with series configuration are adopted in the primary side to reduce the switch voltage stress to half of the input voltage. Abstract—The Z-source inverter is a relatively recent converter topology that exhibits both voltage-buck and voltage-boost capability. The Z-source concept can be applied to all dc-to-ac, acto- dc, ac-to-ac, and dc-to-dc power conversion whether two-level or multilevel. However, multilevel converters offer many benefits for higher power applications.
SBI can produce an ac output voltage that is either greater or less than the available dc input voltage. Also, the SBI exhibits better electromagnetic interference noise immunity when compared to the VSI, which enables compact design of the power converter. Abstract—In this paper, an automatic design tool for a solar energy harvesting IC and system is developed with visual basic software, and the synthesis tool employed in this approach can be used to shorten the design time to market. In addition, a smart meter system is developed to measure the solar energy harvesting system’s information with an online system. Users can thus get the proposed system’s information at any time and from anywhere. 120 Hz coupling deteriorates system reliability in case of output load variation.
Abstract—Voltage-type Γ-Z-source inverters are proposed in this letter. They use a unique Γ-shaped impedance network for boosting their output voltage in addition to their usual voltagebuck behavior. Comparing them with other topologies, the proposed inverters use lesser components and a coupled transformer for producing the high-gain and modulation ratio simultaneously. IEEE Projects Trichy, Best IEEE Project Centre Chennai, Final Year Projects in Trichy – We Provide IEEE projects 2018 – 2019 , IEEE 2018 Java Projects for M.
Tech, IEEE 2018 Dot net Projects for B. Hence, the CSI-fed ac machine has a second-order system in the continuous time domain. This paper presents a design methodology for the closed-loop current controller of the CSI-fed ac machine drive system. Only part of the load power is processed by the active switches, reducing the peak current through the switches to half of the load current, as higher power levels can then be achieved by the proposed topology. The volume of reactive elements, i. Abstract—Anovel high step-up converter is proposed for a frontend photovoltaic system.