Design of a PI Controller for Negative Output 1 & 3 -lift Main Series Switched Capacitor Push Pull Luo Converter

Classic converters like DC-DC converters are having the passive components such as switches, diodes, capacitors and inductors that are combined. By this size of the converter will be large and power density will be low. Power density of the converter can be increased by micro power consumption technique. Voltage-lift technique is the best technique to design circuits in electronics. For more power density, compact size and gain switched capacitors can be used and incorporated into the IC having lesser EMI. This work provide the performance evaluation of PI controller for Negative output push-pull switched capacitor DC-DC 1 lift and 3 lift Luo converter and also performance evaluation of chosen converter with PI controller. Mat lab and Simulink based simulation is carried out under line and load disturbances for performance evaluation

Interleaved High Step-up DC-DC Converter with Diode-Capacitor Multiplier Cell and Ripple-Free Input Current

In this paper interleaving and switched-capacitor techniques are used to introduce a high step-up DC-DC converter for renewable energy systems application. The proposed converter delivers high voltage gain without utilizing transformer or excessive duty cycle and features ripple-free input current which results in lower conduction losses and decreased electromagnetic interference (EMI). Lower output capacitance is another advantage of proposed converter, leading to smaller size and lower cost. Furthermore lower voltage stress on switches allows the utilization of switches with low resistance. Simulation results verify the performance of suggested converter

Interleaved High Step-up DC-DC Converter with Diode-Capacitor Multiplier Cell and Ripple-Free Input Current

In this paper interleaving and switched-capacitor techniques are used to introduce a high step-up DC-DC converter for renewable energy systems application. The proposed converter delivers high voltage gain without utilizing transformer or excessive duty cycle and features ripple-free input current which results in lower conduction losses and decreased electromagnetic interference (EMI). Lower output capacitance is another advantage of proposed converter, leading to smaller size and lower cost. Furthermore lower voltage stress on switches allows the utilization of switches with low resistance. Simulation results verify the performance of suggested converter

Simulation of a high voltage gain dc-dc converter integrating with coupled inductor and two voltage multiplier cells

In this paper, a high voltage gain dc-dc converter is presented for renewable energy applications. This paper develops step up converter which consists of two voltage multiplier cells with coupled inductor in order to achieve the multiple voltage requirements with high voltage gain. And also two capacitances are provided for charging when the device is under turned-off condition, by utilizing the stored energy levels in the coupled inductor which can enhances the voltage transfer capability levels of the system The voltage imbalance levels are compensated at main power switch. The implemented model operates with low resistance RDS(ON) at main power switch which can reduce the switching losses. The developed simulink models are tested and verified within the MATLAB/SIMULINK with multiple output functions with high voltage gains

PV Systems based High Gain Converter using CI and SCC Techniques

In this paper, new techniques of a CI and SCC-based step-up higher-level voltage DC_DC converter were implemented. The CI and SC charging and discharging the energy respectively to attain higher gain. The stress in switching volt level and inductance leakage is detached using the clamp circuitry. The reversed retrieval problem in the diode was eradicated with the help of Coupled Inductor (CI). The new topology to get more gain of the voltage and improved efficiency. The steady state analysis with the operation procedures of novel DC_DC converter is discussed here. In proposed model, input voltage is 24V & Vo is 410V, Pmax is 150W was given to get ηmaximum of 96.4%

High Voltage Gain DC-DC Non-Isolated Converter with Generalized Stages

In this paper, a non-isolated dc-dc converter is proposed to provide a high voltage gain with a low inductance requirement. The circuit can be generalized for multiple stages to realize the desired DC output voltage from a low DC voltage source. In the proposed topology, the capacitors and inductors are charged/magnetized in parallel and discharged/demagnetized in series during switched on and off period respectively to obtain a high step-up voltage gain. The proposed power circuit is suitable for many applications based on renewable energy and energy storage where the desired DC-link voltage requirement can be as high as 560V (three-phase inverter input), and input voltage can be as low as 48V (a string of four batteries or fuel cell). A detailed analysis of the steady-state operation of the power converter is provided in this paper to obtain the voltage gain of the converter. The circuit design is simulated in MATLAB Simulink to verify the results of the analysis of this converter. Further, the design guidelines are provided for the generalized form of the converter to achieve desired steady-state input-output gain. © 2020 IEEE

Design and Analysis of a Non-Isolated High Gain Step-Up Cuk Converter

Renewable energy sources, such as solar energy, are desired for both economic and ecological issues. These renewable energy sources are plentiful in nature and have a terrific capability for power generation. The only drawback of solar energy, which is one of the best forms of energy sources, is that the output has a low voltage and needs to be stepped up in order to be inserted into the DC grid or an inverter for AC applications. To overcome this drawback, a high gain DC-DC power converter is required in this kind of system. These power converters are needed for a better regulation capability with a small density volume, lightweight, high efficiency, and low cost. In this dissertation, different topologies of a non-isolated high gain step-up Cuk converter based on switched-inductor (SL) and switched-capacitor (SC) techniques for renewable energy applications, such as photovoltaic and fuel cell, are proposed. These kinds of Cuk converters provide a negative-to-positive step-up DC-DC voltage conversion. The proposed Cuk converters increase the voltage boost ability significantly using the SL and SC techniques compared with the conventional Cuk and boost converters. Then, a maximum power point tracking (MPPT) technique is employed in the proposed Cuk converter to get the maximum power point (MPP) from the PV panel. The proposed Cuk converters are derived from the conventional Cuk converter by replacing the single inductor at the input, output sides, or both by a SL and the transferring energy capacitor by a SC. The main advantages of the proposed Cuk converters are achieving a high voltage conversion ratio and reducing the voltage stress across the main switch. Therefore, a switch with a lower voltage rating and thus a lower RDS-ON can be used, and that will lead to a higher efficiency. For example, the third topology of the proposed Cuk converter has the ability to boost the input voltage up to 13 times when D=0.75, D is the duty cycle. The voltage gain and the voltage stress across the main switch in all topologies have been compared with conventional converters and other Cuk converters used different techniques. The proposed topologies avoid using a transformer, coupled inductors, or an extreme duty cycle leading to less volume, loss, and cost. The proposed Cuk converters are analyzed in continuous conduction mode (CCM), and they have been designed for 12V input supply voltage, 50kHz switching frequency, and 75% duty cycle. A detailed theoretical analysis of the CCM is represented, and all the equations have been derived and matched with the results. The proposed Cuk converters have been simulated in MATLAB/Simulink and the results are discussed

Dual Output and High Voltage Gain DC-DC Converter for PV and Fuel Cell Generators Connected to DC Bipolar Microgrids

This paper introduces a new topology for a DC-DC converter with bipolar output and high voltage gain. The topology was designed with the aim to use only one active power switch. Besides the bipolar multiport output and high voltage gain this converter has another important feature, namely, it has a continuous input current. Due to the self-balancing bipolar outputs, the proposed topology is suitable for bipolar DC microgrids. Indeed, the topology balancing capability can achieve the two symmetrical voltage poles of bipolar DC microgrids. Furthermore, it is possible to create a midpoint in the output of the converter that can be directly connected to the ground of the DC power supply, avoiding common-mode leakage currents in critical applications such as transformerless grid-connect PV systems. The operating principle of the proposed topology will be supported by mathematical analysis. To validate and verify the characteristics of the presented topology, several experimental results are shown.info:eu-repo/semantics/publishedVersio