What Is The Function Of An Ac Reactor?

ac line reactor generally has two functions:

(1) Suppressing surges (voltage and current); (2) Suppressing harmonic currents.

ac line reactor for vfd is used to limit current surges caused by sudden changes in grid voltage and operating overvoltages, smooth out spike pulses contained in the power supply voltage, or smooth out voltage defects generated during commutation in bridge rectifier circuits. It effectively protects the frequency converter and improves the power factor. It can both prevent interference from the power grid and reduce the pollution of the power grid by harmonic currents generated by the rectifier unit.

ac dc reactor's main function is to compensate for the effects of distributed capacitance in long lines (20-200m), reduce motor ground leakage current, and suppress output harmonic currents, increasing output high-frequency impedance, effectively suppressing dv/dt. It reduces high-frequency leakage current, protecting the frequency converter and reducing equipment noise.

ac input reactor is connected between the DC rectification stage and the inverter stage of the frequency conversion system. Its main purpose is to limit the AC component superimposed on the DC current to a certain specified value, maintain continuous rectification current, reduce the current pulse value, make the inverter stage operate more stably, and improve the power factor of the frequency converter.