Modular and configurable resonant inverter system with dynamic transformer ratio switching and automatic load matching for multi-output induction heating and wireless power transfer applications

A method for automatic load matching in a modular resonant inverter system, comprising:

• providing a plurality of power amplification modules each having an associated matching transformer with switchable primary and secondary windings;
• connecting the outputs of the power amplification modules to a distributed tank capacitor bank that is configurable in series, parallel, or series-parallel configurations;
• measuring the voltage, current, and phase of the load and determining the load impedance;
• dynamically adjusting the primary winding turns of the matching transformers using an electronic switching circuit to modify the transformer ratio based on the measured load impedance;
• reconfiguring the connections of the tank capacitor banks to adjust the resonant frequency of the output circuits;
• and
• automatically matching the impedance of the system to the impedance of the load based on the measured voltage, current and phase of the load and load impedance.

A modular resonant inverter system comprising:

• a plurality of modules, each connected to a matching transformer and a distributed tank capacitor bank;
• a set of electronic switches configured to interconnect the primary and secondary windings of the matching transformers in series, parallel, or series-parallel configurations;
• a control system that monitors the operating parameters of each module and automatically reconfigures the connections of the modules and capacitor banks based on load conditions;
• wherein the control system further comprises a failure detector that isolates a failed module by shorting the primary winding of the associated matching transformer, allowing the remaining modules to continue operating without interruption.