A synchronous cuk converter based photovoltaic energy. Matlab simulation of cuk converter in buck and boost mode simultaneously. Simulation of high gain dcdc converter and conventional dcdc converter with 120 watts of led load has been developed using matlabsimulink software. This simulation is useful to understand the cuk converter. Design, modelling and simulation of a pid controller for. Simulation powered by plecs using websim patented technology. The measured efficiency of the proposed converter is 96% at the rated output power 18v15a. Ltspice is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits. A better solution is a sepiccuk converter, figure 1, which consists of an unregulated cuk converter tied to the switching node of a regulated sepic converter. Section iii presents the open loop and closed loop psim model of the converter.
Simulation with the sepic topology sepicsingle ended. The nonisolated cuk converter is a dcdc power converter that, like a buckboost converter, can produce an output voltage vout magnitude that. In section ii, the overview of the converter, its control scheme and its operating principle is discussed. C cuk 1 p f c out 22 p f l2 47 p h v in 5v d c ff 330 pf r fb1 29. Oct, 2019 this simulation is useful to understand the cuk converter. Lm5022 cuk converter reference design lm5022 cuk converter reference design. Another focus is loop compensation for cuk topology. Design, modelling and simulation of a pid controller for buck. However, it is an inverter converter, so the output voltage is. Get results faster with test and simulation data thats been verified. After modelling accurately the cuk converter operating in discontinuous inductor conduction mode, a statefeedback control strategy based in the subsequent linearized smallsignal fullorder model is designed.
Tiwari2 and smita dobhal3 1,2department of electrical engineering madan mohan malaviya engineering college, gorakhpur, u. Cuk converter can be controlled to maintain the constant dc voltage. Dc to dc buckboostbuck boostsepiccuk converters file. The presented topology is composed of boost and cuk converters, which in comparison with the traditional boost and cuk converter have low output voltage ripple and high voltage gain. Four different modes of cuk converter operating in ccm and dcm have been explored for the development of bldc motor drive with unity power factor at ac mains. Cuk converter file exchange matlab central mathworks. Modelling, analysis, and design of switching converters. The following is a design tool which calculates the parameters for a buck converter, boost converter or buckboost converter stepdownstepup or inverting. But simulation graph shows the following for output voltage. If the switch is open, steady state, you notice that across the winding of l1, c1 is charged lefthanded by the input voltage, but righthanded by l2, also on the negative output voltage. Section iv presents the simulation results obtained and concluding remarks are presented in.
A diode bridge rectifier followed by a cuk converter is fed into a brushless dc motor to attain the maximum power factor. Consider the following sequence of the mosfet conduction state. In this example, the converter is feeding a 50w load from a 12 v source and the pwm frequency is set to 50 khz. However, it is an inverter converter, so the output voltage is of opposite polarity with respect to the input voltage.
Figure 2 cuk converter realized with mosfet and diode the cuk converter inverts its output and its conversion ration is md d1d. Performance comparison of cuk and modified cuk converter. Psim simulation of a buck boost dcdc converter with. This is where the cuk converter provides a more suitable alternative. Ltspice demo circuits design center analog devices.
It also has the same buckboost md d1d conversion ratio as the sepic converter. The nonisolated cuk converter is a dcdc power converter that, like a buckboost converter, can produce an output voltage vout magnitude that is either greater or less than the input voltage vin magnitude. What are the advantages of cuk converter over buckboost. Cuk converter is used for the voltage regulation for the dc application systems.
Using the knowledge of open loop converter behavior, a closed loop converter is designed. A variable dc link voltage of the voltage source inverter vsi feeding bldc motor is used for its speed control. During the continuous conduction mode of operation, the state space equations are as follows, 1 1 1 2 2 2 2 2 1 1 1, 0. Pfc cuk converter fed bldc motor drive matlab projects. The ltspice cuk converter circuit above can be downloaded here.
Simulation example the simulation example consists of a simple cuk pwm dcdc converter as shown in figure 1. Cuk converter, pfc, thd, ccm, pwm, psim, sepic converter. Generate dual supply rails using a highefficiency sepic. Single 48v to 1v, 200a converter powers microprocessors. From the operating mode, the output current of each modes are determined. The circuit parameters are taken from power electronics, d. A synchronous cuk converter based photovoltaic energy system. Verify that the mean value of the load voltage vout is very close to the theoretical value of. The simulation parameters of the converter are listed in table i. Psim simulation of a buck boost dcdc converter with wide.
In this study, software simulations of cuk converters using pi and onecycle control occ methods are analyzed by matlabsimulink program. Simulation results of the proposed cuk converter the new cuk converter discussed in section iii is validated by the simulation results. During the continuous conduction mode of operation, the state space equations are as follows, 1 1 1 2 2 2 2 2 1 1 1,0. Performance comparison of cuk and modified cuk converter for pv. Nov 10, 2016 based on the circuit the formula will be changed vice versa values also change. Cuk discusses a 48v to 1v, 200a hybrid switching topology that supplies present and future microprocessor power requirements along with the ability to handle fast load transients in a single module. This is achieved withthe help of state equations and matlabsimulink tool for simulation of those state equations. Simulation of sepic converter fed leds vivek naithani1 and dr.
Cuk and modified cuk converter compared using matlab software simulation and experimental results. Jun 26, 2018 a unity power factor bridgeless isolated cuk converter fed brushlessdc motor drive, projects on isolated cuk converter latest ieee projects list for eee,power electronics,power systems dedicated to ieee electrical simulation projects only. This paper deals with a power factor correction pfcbased cuk converter fed brushless dc motor bldc drive as a costeffective solution for lowpower applications. But when switch is open then energy stored in the filter inductor is fed back. Jul 21, 2016 now, we change the topology a bit from the sepic converter to the cuk converter, so an inverting sepic.
After modelling accurately the cuk converter operating in discontinuous inductor conduction mode, a statefeedback control strategy based in the subsequent linearized smallsignal fullorder model is. This combination results in two highefficiency supplies that track each other very well under all but a 100% load mismatch. The output voltage of the proposed converter is less sensitive to the load variations. R2 pg scholar, department of eee, ksr college of engineering, tiruchengode, tamil nadu, india.
Simulation and modeling of svm based wecs with pmsg using. In this study, a new nonisolated dcdc cukboost converter structure with high voltage gain is proposed. Ltspice provides macromodels for most of analog devices switching regulators, linear regulators, amplifiers, as well as a library of devices for general circuit simulation. Pspice simulation of a simplified model of cuk converter, voltage input and output and relationship with duty cycle of the device. The proposed synchronous cuk converter implemented in matlab simulation platform and the output performance is analyzed. Ece 562 cuk converter nl5 simulation laboratory page 3 below is the cuk pronounced like book converter with the ideal switches replaced by a mosfet and diode for a practical circuit realization. In the present example, the input voltage is kept at 25v. A unity power factor bridgeless isolated cuk converter fed. Cuk and modified cuk converter compared using matlab software. Aug 28, 2011 cuk converter is an extension of buckboost converter and is capable of either buck or boost the input voltage.
Section iv presents the simulation results obtained and concluding remarks are presented in section v. This work presents a power factor correction pfc based bridgeless isolated cuk converter fed brushless dc bldc motor drive. The cuk converter has an inductor on the input and the output, so both input and output currents have no sharp changes in current. A bldc motor drive fed by a pfc cuk converter using a voltage follower approach. Design and analysis of a new structure of nonisolated dc. Now, we change the topology a bit from the sepic converter to the cuk converter, so an inverting sepic.
Simulation of photovoltaic based grid connected micro inverter using cuk converter deebika. C onclusion this paper presents the system analysis, circuit design consideration and simulation of a zvs cuk converter. Cuk converter circuit is simulated using matlab simulink software and various. A cuk converter transforms a dc voltage at the input to a dc voltage at the output with reversed polarity. Due to the wind fluctuations, output voltage varies continuously. A detailed comparison of all modes of operation has been presented on the basis of feasibility in design and the cost constraint in the development of such drive for low power applications. Single 48v to 1v, 200a converter powers microprocessors part 1 in this threepart series, dr. Ece 562 sepic converter nl5 simulation page 3 the converter shown below is the inverse sepic converter. This paper presents the modeling and simulation of pmsg based wind energy conversion systems wecs using matlab simulink. Oct 18, 2015 cuk converter is an negative voltage converter duty ratio 60% for switch input 12v output 18v more at cuk converter simul. Communities more files in the power electronics control community. Hybrid converters is mainly based on less energy in the magnetic field, leading to saving in the size and cost of the inductors, and less current stresses in the switching elements, leading to smaller conduction losses. Compared to the buck, boost and buckboost converters the cuk converter uses an additional inductor and capacitor to store energy. The calculator assumes that during the normal load the inductor is in continuous mode, meaning that the inductor never fully discharges its current.
The principal objective of this work on modeling and analysis of switching dctodc converters and regulators is to obtain a linear model either through statespace or linear circuit description, subject to appropriate restrictions, for the inherently nonlinear power state in which the dc conversion is accomplished. This paper deals with a power factor correction pfcbased cuk converterfed brushless dc motor bldc drive as a. This paper first presents open loop behavior of buck boost and cuk dcdc converter operated under continuous conduction mode ccm. Because you are not logged in, you will not be able to save or copy this circuit. Performance comparison of cuk and modified cuk converter for. Cuk converter electrical engineering software plexim. In cuk converter, when switch is closed then capacitor c provides energy to the load as well as inductive filter. A general unified approach to modeling and analysis of switching dctodc. Simulation of photovoltaic based grid connected micro. Modeling and control of cuk converter operating in dcm. The typical scematic circuit for the cuk converter is as shown in fig. Pfc cuk converter fed bldc motor drive ieee matlab 2017. Simulated performance of bldc motor drive with cuk converter operating in ccm.
The current of input and output have very low ripple content. The average output to input relations are similar to that of a buckboost converter circuit. A power factor corrected cuk converter fed bldc motor using artificial neural network is simulated in the environment of matlab. Ltspice provides macromodels for most of analog devices switching regulators, linear regulators, amplifiers, as well as a library of devices for general circuit. Cuk converter is an extension of buckboost converter and is capable of either buck or boost the input voltage. Single 48v to 1v, 200a converter powers microprocessors part 1. This model contains the wind turbine, pmsg, diode rectifier, dcdc converter buck boost and svpwm based inverter. Cuk converter is used in hybrid solarwind energy system as a regulator where input voltage depends on speed of wind and sun, inorder to make the output voltage as a constant source cuk converter is used. As also is the case for the sepic converter, this design also does not invert the input to output polarity. A bldc motor drive fed by a pfc cuk converter using a current multiplier approach. Analysis of cuk converters for power factor correction.
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