EVALUATION ANALYSIS OF CONTROL LOOP FEEDBACK SYSTEMS IN RESONANT NETWORK OF THE ISOLATED DC-DC CONVERTER DESIGN

The existing output of the isolated DC-DC Converter requires a good switching
device and needs to be controlled in order to achieve the desired output voltage with
less output ripple voltage. However, this converter cannot maintain the output voltage
with good efficiency in high power application. Currently, any semiconductor devices
need greater efficiency in switching such as high power switching power supply,
motor drives for electrical vehicle (EV), communication systems and others. A new
DC-DC Converter modified via resonant network and controlled with the application
of controller and gate circuit is proposed. The PWM Controller technique is used to
control the output voltage and duty cycle ofthe switches. The paper will cover studies
onthe Zero-Current Switching circuit design and PWM controller in isolated DC-DC
Converter. Then, the simulation using Cadence Pspice is carried out. The
performance ofthe design will be evaluated based on parameters such as input ripple
current, output ripple voltage and efficiency. A control loop feedback systems in
resonant network of the FB-ZCS with better efficiency, less input ripple current of
1.94% and less output ripple voltage of0.47% are obtained from this project. But, the
results obtained cannot be compared with the conventional scheme because of big
differences and suggestions havebeenmade for the improvement.