Patent ID: 8760101

Claim:
An electrical actuator, said actuator ( 1 ) comprising: a control module ( 2 ) receiving a control electric signal and converting this control electric signal into a set-point value for an electric motor ( 4 ); said electric motor ( 4 ) driving a pump ( 5 ) according to said set-point value received from said control module ( 2 ); said pump ( 5 ) generating a hydraulic power allowing to move a hydraulic jack ( 8 ); said hydraulic jack ( 8 ) comprising two chambers ( 9 , 10 ) adapted to be supplied by said pump ( 5 ) and generating the effort of the actuator ( 1 ), said chambers ( 9 , 10 ) being separated by a piston connected to a stem; and at least one pressure relief valve ( 11 ) for limiting the effort generated by said actuator ( 1 ), said pressure relief valve ( 11 ) being automatically opened so as to implement its limitation function when the difference of pressure between the two chambers ( 9 , 10 ) reaches a predetermined value, wherein it further comprises: first means ( 18 ) for implementing a monitoring so as to be able to detect an opening of said pressure relief valve ( 11 ); second means ( 19 ) for calculating, upon the detection of an opening of said pressure relief valve ( 11 ), an auxiliary set-point value allowing, when being applied to the electric motor ( 4 ), to limit the speed of the latter to a predetermined maximum speed being defined so as to prevent an overheat of the actuator ( 1 ) able to damage it; and third means ( 20 ) for applying to said electric motor ( 4 ) said auxiliary set-point value, instead of said set-point value, upon the detection of an opening of said pressure relief valve ( 11 ).