Custom DC Link Inductors for Solar Inverters and Energy Storage Systems

A renewable energy equipment manufacturer was developing a compact solar inverter for distributed photovoltaic and battery storage applications. The inverter required a DC link inductor to reduce current ripple and improve the stability of the power conversion stage, but the available enclosure space and cooling path were limited.

During prototype testing, the original inductor generated excessive heat under continuous high-load operation. The customer also found that the current ripple and switching waveform changed when the inverter operated under different input voltages. Although the standard component met the nominal inductance requirement, its DCR, saturation performance, core loss, and thermal behavior were not fully matched to the complete inverter system.

Golden Eagle reviewed the inverter schematic, DC voltage range, rated current, peak current, switching frequency, target inductance, ripple current, DCR limit, core structure, installation height, cooling method, and expected operating temperature. The engineering team then developed a customized DC link inductor based on the actual electrical and mechanical requirements.

The inductor design focused on the relationship between core material, winding structure, conductor cross-section, magnetic flux, and heat dissipation. A suitable low-loss structure can help reduce power loss, but the final result depends on the switching frequency, current waveform, duty cycle, cooling system, and surrounding components.

The customer evaluated the samples through inductance, DCR, ripple current, saturation behavior, temperature rise, insulation, mechanical fit, switching waveform, and long-duration operation. The inductor was tested together with the inverter control board and cooling structure instead of being evaluated only as an independent component.

Golden Eagle has 15 years of R&D and manufacturing experience in inductors, transformers, coils, and wireless charging components. Suitable projects may receive prototype support within approximately 3–5 days. Actual sample timing, production schedule, and performance results must be confirmed according to the approved drawings, materials, inspection standards, and project records.

The customized DC link inductor helped the customer establish a more suitable magnetic design for the solar inverter and provided a clearer basis for balancing inductance, current capacity, temperature rise, and installation space.

When sourcing an inverter inductor, buyers should provide the DC voltage range, rated and peak current, switching frequency, target inductance, ripple current, DCR requirement, core dimensions, maximum temperature, cooling method, PCB or busbar structure, available height, sample quantity, and estimated annual demand.

Golden Eagle supports OEM and ODM development for photovoltaic inverter inductors, energy storage magnetic components, high-current chokes, transformers, and custom power coils.