An ionization apparatus configured to ionize a fluid to remove polluting/contaminating particulates present in the fluid itself, comprising: at least one ionization tube designed to generate a corona discharge in said fluid when it is supplied with a high alternating supply voltage, and an electronic control system, which is electrically connected to said ionization tube to supply said high alternating supply voltage thereto, said ionization apparatus being characterized in that said electronic control system comprises: an inverter device, which is configured to supply a medium alternating voltage having an operating frequency; said inverter device being further configured to receive an input parameter (Kr, V1r) and being designated to vary said medium alternating voltage according to the input parameter (Kr, V1r) received; a transformer which has a primary circuit connected to said inverter device for receiving said medium voltage and a secondary circuit connected to said ionization tube for supplying said high voltage thereto; a measuring device configured to determine an actual high voltage (V2m) supplied to said ionization tube by said secondary circuit; a controller circuit configured to: receive an input target voltage (V2t), receive said actual high voltage (V2m), compare said input target voltage (V2t) with said actual high voltage (V2m), determine said input parameter (Kr, V1r) for controlling said medium alternating voltage based on said comparison, and supply said determined input parameter (Kr, V1r) to the inverter device. at least one ionization tube designed to generate a corona discharge in said fluid when it is supplied with a high alternating supply voltage, and an electronic control system, which is electrically connected to said ionization tube to supply said high alternating supply voltage thereto, said ionization apparatus being characterized in that said electronic control system comprises: an inverter device, which is configured to supply a medium alternating voltage having an operating frequency; said inverter device being further configured to receive an input parameter (Kr, V1r) and being designated to vary said medium alternating voltage according to the input parameter (Kr, V1r) received; a transformer which has a primary circuit connected to said inverter device for receiving said medium voltage and a secondary circuit connected to said ionization tube for supplying said high voltage thereto; a measuring device configured to determine an actual high voltage (V2m) supplied to said ionization tube by said secondary circuit; a controller circuit configured to: receive an input target voltage (V2t), receive said actual high voltage (V2m), compare said input target voltage (V2t) with said actual high voltage (V2m), determine said input parameter (Kr, V1r) for controlling said medium alternating voltage based on said comparison, and supply said determined input parameter (Kr, V1r) to the inverter device. an inverter device, which is configured to supply a medium alternating voltage having an operating frequency; said inverter device being further configured to receive an input parameter (Kr, V1r) and being designated to vary said medium alternating voltage according to the input parameter (Kr, V1r) received; a transformer which has a primary circuit connected to said inverter device for receiving said medium voltage and a secondary circuit connected to said ionization tube for supplying said high voltage thereto; a measuring device configured to determine an actual high voltage (V2m) supplied to said ionization tube by said secondary circuit; a controller circuit configured to: receive an input target voltage (V2t), receive said actual high voltage (V2m), compare said input target voltage (V2t) with said actual high voltage (V2m), determine said input parameter (Kr, V1r) for controlling said medium alternating voltage based on said comparison, and supply said determined input parameter (Kr, V1r) to the inverter device.