Design, Analysis and Implementation of Class E Resonant Inverter

Abstract

There is a large diversity of manufacturing, technical and medical practices that require consistent, low-cost, high-frequency supply sources. Class E resonant inverters meet these requirements. This thesis is based on the theoretical background and design procedure for class E resonant inverter. Simulation and implementation of class E resonant inverter circuit and its application in wireless power transfer system have been discussed here.
In real switching devices, the energy kept in the parasitic capacitance of the switch is instantly dissolute as a heat at the switching instant, which in general called switching loss across switch. Since the switching loss arises at every single switching instant, the switching losses are directly related to the switching frequency. The class-E Resonant inverter is one of the inverter which operation satisfies the zero voltage switching (ZVS) and zero derivatives switching (ZVDS). Hence, there is negligible switching loss arises in the class-E inverter.
As the class E circuit operates in optimum and sub-optimum mode of operation, A detailed analysis of the circuit has been done for optimum mode of operation and all the components of the class E circuit is designed for optimum condition. In PSpice environment the circuit is simulated at a frequency of 333 kHz. The circuit is then implemented in an experimental setup, and the this class E circuit is fabricated in a inductive wireless power transfer.
After simulating the class E circuit it is found that the zero voltage switching occurs at the switching instants. Output voltage and the current is AC in nature. The result of the simulation is verified from the circuit implementation. From the circuit fabrication of class E circuit for wireless power transfer, it is found that the power is transmitted through coupled coil and transferred power is mainly depend on the coupling coefficient of the inductor.