Toroidal Inductor for Solar Inverter Boost and Filter Stages

We need the input voltage range, DC link voltage, maximum power, switching frequency, target ripple current or inductance, and peak and RMS inductor current. Ambient temperature, cooling arrangement and any size or mounting limits complete the picture. If you only have the electrical operating points, our engineers can propose the inductance and core; design support is free against firm production intent.

A boost inductor carries DC with high-frequency ripple, so DC bias behaviour and switching-frequency core loss dominate. An output filter inductor carries the 50 Hz sine current with ripple from the bridge superimposed, so the core sees a large low-frequency flux swing and must not saturate at the peak of the sine wave, including overloads.

Yes. The 25 A figure is the limit of our standard toroidal power inductor range. Custom designs go higher using heavier gauge or multi-strand copper and a correspondingly larger core. The practical ceiling depends on inductance, allowable temperature rise and the space available, so we state the achievable rating in the quotation after reviewing your specification.

Long life comes mainly from running cool. We size the winding and core to the temperature rise you specify at your maximum ambient, and advise on core material where sustained heat could raise losses over time. Every unit is tested for inductance, DCR, Q factor, saturation current and hipot, and batch records provide traceability. Enclosure-level validation remains the inverter maker's responsibility.

Custom samples are typically ready within 7 to 10 working days and are provided free for lab approval. Single-piece prototypes are possible for custom designs, and about 10 pieces is a normal quantity for R&D builds. Production minimums for custom parts are typically 100 to 1,000 pieces. Orders are delivered with a test certificate on request.