Power Factor Correction Device Under Electromagnetic Compatibility Specifications

capacitor bank for power factor improvement often needs to meet harmonic standards such as IEC 61000-3-2, which impose specific parameter limits on the emission level of harmonic currents. IEC 61000-3-2 specifies the maximum permissible values ​​from the second to the 40th harmonic for products with input current not exceeding 16A per phase, aiming to control voltage distortion and power quality impacts in the power grid.

power correction device plays a role in high-power switching power supplies, which generate nonlinear currents without front-end correction circuitry, resulting in significant harmonic content. By integrating standard-compliant front-end PFC circuitry, parasitic high-order harmonic components can be reduced, making the input current closer to a sine wave.

Manufacturers typically refer to the IEC 61000-3-2 requirements of the target market when developing power factor correction device industrial design specifications, evaluating the harmonic behavior of equipment under various load conditions. This includes testing and verification of specific harmonic components to ensure that data at different operating points comply with the limits specified in the standard.