Cuk converter, pfc, thd, ccm, pwm, psim, sepic converter. Design, modelling and simulation of a pid controller for. Ltspice provides macromodels for most of analog devices switching regulators, linear regulators, amplifiers, as well as a library of devices for general circuit simulation. As also is the case for the sepic converter, this design also does not invert the input to output polarity. Due to the wind fluctuations, output voltage varies continuously. The typical scematic circuit for the cuk converter is as shown in fig.
Simulation results of the proposed cuk converter the new cuk converter discussed in section iii is validated by the simulation results. Tiwari2 and smita dobhal3 1,2department of electrical engineering madan mohan malaviya engineering college, gorakhpur, u. The output voltage of the proposed converter is less sensitive to the load variations. 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. 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. 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. A general unified approach to modeling and analysis of switching dctodc. Simulated performance of bldc motor drive with cuk converter operating in ccm.
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. Psim simulation of a buck boost dcdc converter with wide. 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 simulation graph shows the following for output voltage.
Consider the following sequence of the mosfet conduction state. A diode bridge rectifier followed by a cuk converter is fed into a brushless dc motor to attain the maximum power factor. Modelling, analysis, and design of switching converters. Because you are not logged in, you will not be able to save or copy this circuit. Design and analysis of a new structure of nonisolated dc. The circuit parameters are taken from power electronics, d. This simulation is useful to understand the cuk converter. This work presents a power factor correction pfc based bridgeless isolated cuk converter fed brushless dc bldc motor drive. C onclusion this paper presents the system analysis, circuit design consideration and simulation of a zvs cuk converter. Communities more files in the power electronics control community. Cuk converter circuit is simulated using matlab simulink software and various. Design, modelling and simulation of a pid controller for buck.
Cuk converter can be controlled to maintain the constant dc voltage. Get results faster with test and simulation data thats been verified. Generate dual supply rails using a highefficiency sepic. However, it is an inverter converter, so the output voltage is. Simulation of photovoltaic based grid connected micro inverter using cuk converter deebika. In the present example, the input voltage is kept at 25v. Pfc cuk converter fed bldc motor drive matlab projects. In this study, a new nonisolated dcdc cukboost converter structure with high voltage gain is proposed. This paper deals with a power factor correction pfcbased cuk converterfed brushless dc motor bldc drive as a. This is achieved withthe help of state equations and matlabsimulink tool for simulation of those state equations. The cuk converter has an inductor on the input and the output, so both input and output currents have no sharp changes in current. Now, we change the topology a bit from the sepic converter to the cuk converter, so an inverting sepic.
The nonisolated cuk converter is a dcdc power converter that, like a buckboost converter, can produce an output voltage vout magnitude that. Oct, 2019 this simulation is useful to understand the cuk converter. 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. Cuk and modified cuk converter compared using matlab software. Section iv presents the simulation results obtained and concluding remarks are presented in section v. This paper first presents open loop behavior of buck boost and cuk dcdc converter operated under continuous conduction mode ccm. A bldc motor drive fed by a pfc cuk converter using a voltage follower approach. This combination results in two highefficiency supplies that track each other very well under all but a 100% load mismatch. 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. A synchronous cuk converter based photovoltaic energy system. 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.
The calculator assumes that during the normal load the inductor is in continuous mode, meaning that the inductor never fully discharges its current. Simulation with the sepic topology sepicsingle ended. Pspice simulation of a simplified model of cuk converter, voltage input and output and relationship with duty cycle of the device. Pfc cuk converter fed bldc motor drive ieee matlab 2017. Jul 21, 2016 now, we change the topology a bit from the sepic converter to the cuk converter, so an inverting sepic. Cuk converter file exchange matlab central mathworks.
Matlab simulation of cuk converter in buck and boost mode simultaneously. Figure 2 cuk converter realized with mosfet and diode the cuk converter inverts its output and its conversion ration is md d1d. Psim simulation of a buck boost dcdc converter with. Simulation of photovoltaic based grid connected micro. Aug 28, 2011 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 in this threepart series, dr. But when switch is open then energy stored in the filter inductor is fed back. A variable dc link voltage of the voltage source inverter vsi feeding bldc motor is used for its speed control. 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.
Single 48v to 1v, 200a converter powers microprocessors part 1. A synchronous cuk converter based photovoltaic energy. In this example, the converter is feeding a 50w load from a 12 v source and the pwm frequency is set to 50 khz. A bldc motor drive fed by a pfc cuk converter using a current multiplier approach. Simulation and modeling of svm based wecs with pmsg using. Lm5022 cuk converter reference design lm5022 cuk converter reference design. 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. Performance comparison of cuk and modified cuk converter. Compared to the buck, boost and buckboost converters the cuk converter uses an additional inductor and capacitor to store energy. Ltspice provides macromodels for most of analog devices switching regulators, linear regulators, amplifiers, as well as a library of devices for general circuit. A cuk converter transforms a dc voltage at the input to a dc voltage at the output with reversed polarity. In cuk converter, when switch is closed then capacitor c provides energy to the load as well as inductive filter. However, it is an inverter converter, so the output voltage is of opposite polarity with respect to the input voltage.
This model contains the wind turbine, pmsg, diode rectifier, dcdc converter buck boost and svpwm based inverter. 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. 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. The current of input and output have very low ripple content. Cuk and modified cuk converter compared using matlab software simulation and experimental results.
Simulation of sepic converter fed leds vivek naithani1 and dr. It also has the same buckboost md d1d conversion ratio as the sepic converter. Dc to dc buckboostbuck boostsepiccuk converters file. Cuk converter is an extension of buckboost converter and is capable of either buck or boost the input voltage. Nov 10, 2016 based on the circuit the formula will be changed vice versa values also change. Simulation powered by plecs using websim patented technology. The simulation parameters of the converter are listed in table i. The average output to input relations are similar to that of a buckboost converter circuit. Ece 562 sepic converter nl5 simulation page 3 the converter shown below is the inverse sepic converter. The measured efficiency of the proposed converter is 96% at the rated output power 18v15a.
Cuk converter electrical engineering software plexim. Section iii presents the open loop and closed loop psim model of the converter. R2 pg scholar, department of eee, ksr college of engineering, tiruchengode, tamil nadu, india. Modeling and control of cuk converter operating in dcm. From the operating mode, the output current of each modes are determined. Another focus is loop compensation for cuk topology. This is where the cuk converter provides a more suitable alternative. A unity power factor bridgeless isolated cuk converter fed. Verify that the mean value of the load voltage vout is very close to the theoretical value of. Section iv presents the simulation results obtained and concluding remarks are presented in.
The following is a design tool which calculates the parameters for a buck converter, boost converter or buckboost converter stepdownstepup or inverting. Using the knowledge of open loop converter behavior, a closed loop converter is designed. Performance comparison of cuk and modified cuk converter for pv. 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.
Analysis of cuk converters for power factor correction. 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. Simulation of high gain dcdc converter and conventional dcdc converter with 120 watts of led load has been developed using matlabsimulink software. Performance comparison of cuk and modified cuk converter for. The ltspice cuk converter circuit above can be downloaded here. A power factor corrected cuk converter fed bldc motor using artificial neural network is simulated in the environment of matlab. 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.
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. Ltspice demo circuits design center analog devices. In section ii, the overview of the converter, its control scheme and its operating principle is discussed. The proposed synchronous cuk converter implemented in matlab simulation platform and the output performance is analyzed.
Again, its pretty close to a twostage approach here. Simulation example the simulation example consists of a simple cuk pwm dcdc converter as shown in figure 1. Single 48v to 1v, 200a converter powers microprocessors. 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.
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. 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. What are the advantages of cuk converter over buckboost. Cuk converter is used for the voltage regulation for the dc application systems. In this study, software simulations of cuk converters using pi and onecycle control occ methods are analyzed by matlabsimulink program.
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