https://www.micnodrive.com/definition-of-ac-reactor.html DC Reactor Function The series inverter uses an AC reactor for inverter and a capacitor bank in series to form a reactive power compensation device. Its functions are: 1. Limit or even eliminate the amplification effect of the power reactor group on system harmonics when the series AC reactor for inverter is not installed. 2. Reduce the closing inrush current and inrush current frequency of the capacitor bank, making it easy to select loop equipment and protective capacitors. 3. Reduce the voltage value of this sub-harmonic on the bus to improve the quality of power supply.