Stabilization of Output Voltage with Feedback Circuit and Filter on 2 Stages-Step Up Converter (24V to 312V DC)

摘要

Most DC voltage sources available produce low power whilst the supply needed for electrical devices is 220V AC The use of step up converter can be applied to several renewable energy sources that have relatively low output voltage. However, the output voltage of the DC-DC converter is often unstable due to the instability of the input voltage, the influence of the load, and the corrupted signal. To keep the output voltage of step up converter remains stable when given the load, this study implemented feedback circuit to adjust the duty cycle value, so that with the variation of the load, the output voltage remains stable. The designated 2 step step-up converter was able to amplify 24V DC input voltage to 312V DC. The output voltage was set at 312V DC to meet the AC voltage value of 220V based on DC-AC voltage conversion rules. The step up converter was tested with variations of input DC voltage, from 20 V-24 V. The test results show that the converter with feedback circuit produces a more stable output voltage than the converter without feedback.