Air Core Coil with Flat Wire Winding for High Current Handling Low DC Resistance

Our Air Core Coils with Flat Wire Winding Copper Coil are specifically engineered for high current applications, integrating premium flat copper wire with precision winding technology to deliver exceptional performance.

Unlike traditional round wire coils, the flat wire design provides a larger cross-sectional area and surface-to-volume ratio, enabling superior current-carrying capacity, lower DC resistance, and minimal skin effect losses—ensuring stable operation, high energy efficiency, and reliable heat dissipation even under continuous high-load conditions.

The air core structure eliminates magnetic core saturation and core losses, maintaining consistent inductance across a wide range of operating frequencies, making these coils ideal for high-power, high-frequency electronic systems that demand stability and durability.

These air core flat wire copper coils are widely applied in electric vehicle (EV) on-board chargers. In EV on-board chargers, which require converting AC power from the grid to DC power for charging the vehicle's battery, high current carrying capacity and stable inductance are critical.

Our flat wire air core coils are installed in the charger's power conversion module, where they efficiently handle the high current (up to 50A or more) generated during the charging process. The low resistance and excellent heat dissipation of the flat wire design prevent overheating, while the air core structure ensures stable inductance even as the charging current and frequency fluctuate, effectively improving the charger's conversion efficiency, reducing energy loss, and extending the service life of both the charger and the vehicle battery—meeting the strict performance and reliability requirements of automotive electronic systems.