Comparison of LC filters and damping filters

Since its electric circuit structure has no damping, the traditional LC filter, which is normally applied to output filters, is inclined to generate oscillations at the output port. The damping filter is introduced, which replaces the capacitor C of traditional LC filter with a damping circuit of two capacitors and one resistor. Circuit parameters are set properly by calculation and simulation to ensure the output filter has both good damping effect and low power loss, which suppresses vibration and enhances system stability and performance. Analysis with simulations shows the damping filter is effective, simple and cheap.