Application of ADALINE-based ARX model to control the DC-link voltage in resonant inverters used in induction cookers

The full-bridge inverter is by far the most common choice in numerous practical applications, although it employs four active switches that may lead to increased cost. On the other hand, half-bridge inverters are more cost attractive due to reduced component count, but they usually demand the use of symmetrical dc voltage sources. The class DE current-source parallel resonant inverter is a prominent example within the context of half-bridge topologies adequate to induction cookers, while this paper aims at comparing its performance with that regarding a full-bridge inverter. Considering that the inverter dc link voltage may come to vary and consequently affect the load voltage, a technique that allows keeping it constant is then proposed and evaluated i.e. autoregressive model with exogenous input (ARX) based on adaptive linear neural network (ADALINE). Simulation results are presented and thoroughly discussed to demonstrate the performance of the proposed approach.