Publication: Elektronik kuasa dalam aplikasi pengecasan kapasitor
Date
2005-03-01
Authors
Nik Ramli, Nik Izudin
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Abstract
This project is to design a power electronics circuit that can be used in capacitor charging applications. The circuit is called a Half Bridge Series Loaded Resonance Converter. The function of this circuit is to supply resonance dc power. This circuit is act like a transformer which can step down an input dc voltage until the output voltage is less than half of the input voltage. For this project, the circuit using an input voltage of 30V. Analysis have been done using PSIM software. From PSIM simulation, we know that the output voltage produced depends on resonant frequency and switching frequency. Circuit operation mode will be effected if there is some changes in switching frequency. There are two modes of circuit operations which are continuous and discontinuous mode. Discontinuous mode occured when switching frequency is less than half of resonance frequency and continuous mode occured when switching frequency is more than half of resonance frequency. From the simulation of discontinuous mode, it shows that the output voltage is 5V. While for the continuous mode the output voltage is 12V. We have already know that when switching frequency is high, the output voltage produced is also high but it is limited until half of the input voltage. The designed switching circuit is using a PWM technique to control the MOSFET.