International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 03 | Mar -2017
p-ISSN: 2395-0072
www.irjet.net
AN INTERLEAVED HIGH STEP-DOWN CONVERSION RATIO BUCK CONVERTER WITH LOW SWITCH VOLTAGE STRESS Jeema Jose1, Jubin Eldho Paul2 1PG
Scholar, Department of Electrical and Electronics Engineering, Ilahia College of Engineering and Technology, Muvattupuzha, Mulavoor P O, Kerala, India.
2Assistant
professor, Department of Electrical and Electronics Engineering, Ilahia College of Engineering and Technology, Mulavoor P.O, Muvattupuzha, Kerala, India.
---------------------------------------------------------------------***--------------------------------------------------------------------current ripple so size of input filter also increases. The Abstract - This paper present a non-isolated interleaved simple control chips produce a PWM signal with little buck converter, constituted by two switches, two diodes, two voltage balance capacitors, and three inductors. It is similar to mismatch in D compared to other interleaved module, a three level buck converter, but the two switches interleaved due to difference in driver and power switches. So the to share the converter power between the two interleaved converter module with higher duty ratio operates in modules. The interleaving technique reduce the voltage stress CCM (continuous conduction mode) and the other across the switch approximately equal to half the input module in DCM (discontinuous conduction mode). To voltage and peak current through the switch to half of the solve the above mentioned problems of un-balanced load current. So the converter is suitable for high power current-sharing, the capacitive voltage division is applications. Also it has low switching losses and used for high introduced by two separate input capacitors; the main frequency applications. Higher frequency converters have objectives of the new voltage-divider circuit in the reduced component size. The converter operates in continuous converter are both dividing the input voltage for conduction mode for wider range of operation. The in front voltage balance capacitors helps in automatically balancing reducing voltage stresses of active switches and also the inductor current. So it requires no complex current control for increasing the step-down conversion ratio. As a methods. Simulation of the new interleaved buck converter is result, the converter possesses the low switch voltage done with 200V Dc input, 240W output power, and 50 KHz stress characteristic. Moreover, due to the charge frequency. balance of the capacitor, the converter features automatic uniform current sharing characteristic of the Key Words: Interleaved Buck Converter (IBC), dutyinterleaved phases without adding extra complex cycle (D), Voltage stress, Automatic uniform current control circuitry. Also since the two input switches are sharing‌. operating in continuous conduction mode by automatic uniform current sharing characteristic, the input current to the switches are also continuous. 1. INTRODUCTION The proposed converter can be used for high power applications like, distributed power systems, An interleaved buck converter (IBC) is widely battery storage systems, VRMs (Variable Regulator used as a non-isolated, step-down, high-output-current, Modules) of CPU board, battery chargers, fuel cell and low output current ripple converter with simple battery storage, led drivers etc. Conventional IBC in control and structure. Interleaving technique connects high input voltage or high power applications have dc-dc converters in parallel to share the power flow disadvantages like, voltage stress of switch equal to between two or more conversion chains it implies a input voltage so high voltage rated devices are used. reduction in the size, weight and volume of inductors High-voltage rated elements suffers from high on-state and capacitors. The proposed converter has conversion resistance which means high switching losses. Also ratio approximately half of conventional IBC for small high output capacitor is used, so the size and cost of the duty cycles, smaller the D better the bucking. In converter are increased. The proposed converter has conventional IBC use of small D to achieve better voltage stress equal to half of input voltage due to conversion ratio have disadvantages like, increasedpresence of input voltage divider. The proposed IBC is losses, peak current of switch, and increased input Š 2017, IRJET
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