An active damping system, comprising: a direct current, DC, power source; an active damper, comprising: a stabilization resistor; a stabilization switch coupled in series with the stabilization resistor; a current sensor coupled to the DC power source; and an active damper controller coupled to the current sensor and the stabilization switch, the active damper controller comprising: a bandpass filter configured to receive current from the current sensor and to select a current ripple from the received current; an absolute value function unit coupled to the output of the bandpass filter; a low pass filter coupled to the output of the absolute value function unit to produce a detected current ripple; and a comparator configured to compare the detected current ripple to a reference current ripple; a zero cross detector coupled to the output of the comparator; and a gate drive coupled to the output of the zero cross detector and configured to close the stabilization switch in response to the zero cross detector detecting the current ripple crossing zero; wherein the active damping system further comprises: a constant power load; and an input filter electrically coupled with the constant power load and the active damper, wherein the input filter is an LC filter that includes an input capacitor coupled to an input inductor, wherein the input inductor is connected in series with the current sensor; and wherein the active damping system is configured such that if the active damping system becomes unstable when the input filter is connected to the constant power load, the active damper is configured to stabilize the active damping system by connecting the stabilization resistor in parallel with the input inductor of the input filter for a period of time creating a stabilization pulse, wherein the active damper is configured to be responsive to the magnitude of the current ripple at selected frequency of oscillations and is configured to be controlled by the active damper controller. a direct current, DC, power source; an active damper, comprising: a stabilization resistor; a stabilization switch coupled in series with the stabilization resistor; a current sensor coupled to the DC power source; and an active damper controller coupled to the current sensor and the stabilization switch, the active damper controller comprising: a bandpass filter configured to receive current from the current sensor and to select a current ripple from the received current; an absolute value function unit coupled to the output of the bandpass filter; a low pass filter coupled to the output of the absolute value function unit to produce a detected current ripple; and a comparator configured to compare the detected current ripple to a reference current ripple; a zero cross detector coupled to the output of the comparator; and a gate drive coupled to the output of the zero cross detector and configured to close the stabilization switch in response to the zero cross detector detecting the current ripple crossing zero; a stabilization resistor; a stabilization switch coupled in series with the stabilization resistor; a current sensor coupled to the DC power source; and an active damper controller coupled to the current sensor and the stabilization switch, the active damper controller comprising: a bandpass filter configured to receive current from the current sensor and to select a current ripple from the received current; an absolute value function unit coupled to the output of the bandpass filter; a low pass filter coupled to the output of the absolute value function unit to produce a detected current ripple; and a comparator configured to compare the detected current ripple to a reference current ripple; a zero cross detector coupled to the output of the comparator; and a gate drive coupled to the output of the zero cross detector and configured to close the stabilization switch in response to the zero cross detector detecting the current ripple crossing zero; wherein the active damping system further comprises: a constant power load; and an input filter electrically coupled with the constant power load and the active damper, wherein the input filter is an LC filter that includes an input capacitor coupled to an input inductor, wherein the input inductor is connected in series with the current sensor; and a constant power load; and an input filter electrically coupled with the constant power load and the active damper, wherein the input filter is an LC filter that includes an input capacitor coupled to an input inductor, wherein the input inductor is connected in series with the current sensor; and wherein the active damping system is configured such that if the active damping system becomes unstable when the input filter is connected to the constant power load, the active damper is configured to stabilize the active damping system by connecting the stabilization resistor in parallel with the input inductor of the input filter for a period of time creating a stabilization pulse, wherein the active damper is configured to be responsive to the magnitude of the current ripple at selected frequency of oscillations and is configured to be controlled by the active damper controller.