SUPERIMPOSED TECHNIQUE IN WIRELESS POWER TRANSFER

The implementation of WPT is to make life better and reduce a usage of wire or cable. The issues for certain application are needed to put very near between transmitter and receiver. Superimposed technique is studied to solve a part in WPT technology. Using DC voltage in series with AC voltage in the coil can increase the voltage in AC type. 100W of power transmission is used to transmit the electrical energy. The method was used to analyze the coil based on two sizes, which are 16cm and 160cm of the diameter of the coil. Both experiments were tested in open area without barrier. The purposed of design to identify the performance of coil transmission based on distance in the WPT system to turn on the 5V of LED. To get longer distance, superimposed technique is applied to get higher voltage at the transmission coil. Superimposed technique shows the increment of distance up to 2 times compared to the system without superimposed technique. Keywords : resonant frequency; coil; power transmission; transmission distance; superimposed technique.