Abstract
This paper presents the design of a buck converter circuit with different input switching frequency by using Matlab Simulink software. This study focuses on defining the suitable value of the inductor and capacitor to be used in the buck converter with 100VDC supply input, where the input switching frequency is use 5kHz and 25kHz. This is because the input switching frequency of a buck converter affects many aspects of circuit functionality. This design of the circuit used 20% of the duty cycle, and inductor value is 25% of Lmin to ensure the operation is in continuous current mode. The evaluation of inductor current and switching frequency used in the circuit and parameters for this analysis based on the output voltage, inductor voltage and inductor current waveform. The design of the circuit verified by simulation and results compared with the theoretical. In addition, the appropriate input switching frequency between 5kHz and 25kHz has been determined in order to use in the buck converter circuit for 100Ω resistive load.
Highlights
This paper presents the design of a buck converter circuit with different input switching frequency by using Matlab Simulink software
The purpose of this study is to verify by simulation and the results are compared with the theoretical of output voltage, inductor current and an inductor voltage waveform of the circuit
In design and build the buck converter circuit, the analysis is beginning by making this assumption the circuit is operating in the steady-state, the inductor current is continuous current mode operation and the output voltage is kept constant at voltage Vo (Rashid,2017)
Summary
This paper presents the design of a buck converter circuit with different input switching frequency by using Matlab Simulink software. This is because the input switching frequency of a buck converter affects many aspects of circuit functionality This design of the circuit used 20% of the duty cycle, and inductor value is 25% of Lmin to ensure the operation is in continuous current mode. The DC to DC converter is a static device that used to obtain a variable DC output voltage from a constant DC power supply (Hannon et al, 2007) It can be classified into two types is a buck converter and a boost converter. The purpose of this study is to verify by simulation and the results are compared with the theoretical of output voltage, inductor current and an inductor voltage waveform of the circuit It can determine the suitable switching frequency for the buck converter circuit.
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