Patent ID: 7800330

Claim:
A method for regulating a voltage U c between a first and a second output point of a low-pass RLC filter of natural period T f , the RLC filter including two input points electrically connected, respectively, to conductors of a DC bus of an electric vehicle powered via a catenary, first and second output points being electrically connected to a controllable electric converter for controlling torque exerted by an electric traction motor of the electric vehicle, stator time constant τ of the electric traction motor being strictly less than the natural period T f , the method including measuring or estimating the intensity I li of a line current I l flowing through an inductance of the filter at an instant t i , of a voltage U ci between the first and second output points of the filter at the instant t i , and of a line voltage U l between the input points of the filter, wherein the method is a deadbeat control method comprising: calculating a setting Ī uc for an average intensity Ī u of a DC current I u flowing through the first output point of the filter between the instant t i and an instant t i+1 , the setting Ī uc being established from discretized state equations of the filter in such a way that the voltage U c is equal to a predetermined voltage setting U cc at the instant t i+1 , the discretized state equations between them establishing relationships between the intensities and I li to I l,i+1 of a line current I l at the instants t i and t i+1 respectively, the voltages t ci and U c,i+1 between the first and second output points of the filter at the instants t i and t i+1 respectively, the average line voltage Ū l between the instants t i and t i+1 and the average intensity Ī u ; and controlling the electric converter in order to produce a current I u flowing through the first output point of the filter, the average intensity Ī u of which between the instants t i and t i+1 is equal to the setting Ī uc , the time interval T between the instants t i and t i+1 being strictly less than 5τ.