The magnetic material for the boost inductor in solar inverters has almost always been ferrite and typically a ferrite toroid. In today’s solar inverters, efficiency has become a critical measurement. Increasing efficiency 1% or even 0.5% is extremely important. Replacing ferrite in the boost inverter with Nanoperm® reduces core losses and copper losses increasing the efficiency. The ferrite material used in the boost inductor is either a power material (ui~2400) or a high perm material (ui~10000). A comparison of the different materials used in the boost inductor is shown here:
|Magnetic Material||Perm @10KHz||Perm @100KHz||Bsat (mT) @25°C||Bsat (mT) @100°C||Tc|
|High Perm ferrite||10,000||10,000||380||230||120|
Using a Nanoperm® toroid allows the toroid to be smaller because of the higher permeability. Nanoperm® core loss at this frequency is lower than ferrite. Also a smaller core allows for less copper reducing the copper loss. The end result is a more efficient inductor.