Selection Strategies For Capacitors And Filtering Devices In Harmonic Filters

The selection of a high-performance filter capacitor in series with a high-linearity filter device for active harmonic filter cost is primarily to improve the frequency selectivity of ahf harmonic filter, reduce heat generation and losses caused by equivalent series resistance (ESR), suppress time-domain distortion caused by dielectric absorption, and reduce capacitor voltage drift with temperature. The high-linearity network can mitigate harmonic intermodulation and nonlinear resonance shift of automatic harmonic filter, facilitate impedance matching and resonant point control with inductors and damping components, and allow harmonic filter cost to withstand higher ripple current and extend its lifespan.