Multi-frequency controllers for inductive heating and associated systems and methods

A system for inductively heating a load, the system comprising:

• an inductor coil configured to heat a fluid flowing through a module, the module including a core;
• a thermal sensor configured to sense a temperature associated with the core or the fluid;
• a first set of capacitors configured to be operably coupled to the inductor coil;
• a second set of capacitors configured to be operably coupled to the inductor coil;
• a microcontroller communicatively coupled to the thermal sensor and the first and second sets of capacitors, and
• a plurality of switches configured to communicatively couple the first and second sets of capacitors to the microcontroller, respectively, wherein the microcontroller is configured to:
• send interleaving electrical signals to the inductor coil, the electrical signals including a first electrical signal having a first frequency and a first duty cycle, and a second electrical signal having a second frequency, different than the first frequency, and a second duty cycle, wherein the first and second frequencies are selected from a plurality of predetermined frequencies, and wherein the first electrical signal causes the first set of capacitors to be electrically connected to the inductor coil, and the second electrical signal causes the second set of capacitors to be electrically connected to the inductor coil;
• receive a temperature signal including the temperature associated with the core or the fluid;
• and
• adjust, based at least in part on the received temperature signal, at least one of the first or second duty cycles.