METHOD FOR CONTROLLING AN ELECTROMAGNETIC RETARDER

摘要

The invention relates to a method for controlling an electromagnetic retarder comprising a current generator into which an excitation current is injected. The inventive method consists in determining a maximum allowable intensity (Im) of the excitation current to be injected into the stator primary coils of the retarder which includes a shaft bearing secondary windings and field coils which are supplied by the secondary windings, said primary coils and secondary windings forming the generator. The retarder includes a jacket inside which the field coils generate Foucault currents and a circuit for the liquid cooling of said jacket. More specifically, the invention consists in determining the maximum allowable intensity in real time, such as to reach a critical temperature of the cylindrical jacket and determining said critical temperature taking account of a temperature value of the coolant. The invention is suitable for retarders that are intended for vehicles such as heavy vehicles.