Circuit for regulating current in an inductive load

Claim 1

Circuit for the regulation of the current flowing in an inductive load fed by a voltage source, comprising: an electronic control device having a control electrode and input and output electrodes placed in series with the load; a comparator having a first signal representing a reference current value connected to one input and a second signal representing the instantaneous value of the current flowing in the load and in said electronic control value connected to a second input and its output connected to said control electrode; said comparator has a hysteresis type transfer characteristic, wherein the thresholds -H/2 and +H/2 define the transitions of the electronic control device to the cut-off state or to the saturation conducting state, to oscillate the current in the load between two values that are closely above and closely below the nominal current to be established in the load; and a feedback loop operatively connected between a terminal common to the load and to said device, and said control electrode, said feedback loop coacting with said comparator, for controlling a proportional conduction of said device when the voltage at said common terminal reaches a predetermined threshold for oscillating the current in the load about a nominal value and a loop stability corrector network.