The purpose of the control circuit is to provide a square wave pulse to the gate of each mosfet transistor so that it is turned on and off in the correct sequence. Frequency adjustment allows this circuit to be tuned in the 100kHz range to allow more variation in the resonance components. Phase can also be adjusted to conrol switching times and thus vary the final output voltage of the DC to DC Converter.
The driver board is simply a current amplification circuit that also provides some isolation between stages. This is neccessary because the control IC can not provide enough current to drive the power mosfets on the power board. As this stage was designed and built by Dr. Bhat it will not be discussed in detail here, please contact him for further details.
The power circuit is the final and most important stage of the project. It consists of the Mosfet Bridge , a series connected capacitor and inductor with parallel connected capacitor to transformer (hence LCC), a full wave bridge rectifier, and a capacitive output filter. By using the series-parallel configuration (or LCC resonant type) for the converter it is possible to operate at high frequency, with high efficiency reducing the size, weight, and cost. The transformer provides isolation to the output while the rectifier and output filter capacitor convert the square wave to a smooth DC output.