Patent ID: 7275794

Claim:
A braking system for battery-powered industrial trucks, the trucks having wheels, one of which is a driving wheel, the system comprising: a three-phase driving motor ( 10 ) which drives the driving wheel, a first braking device ( 12 ) associated with the driving wheel, a brake pedal ( 20 ) with which a braking signal generator ( 22 ) is associated to generate a first electric braking signal corresponding to a desired braking force value in response to the excursion of the brake pedal ( 20 ), a control device ( 14 , 16 ) for the driving motor ( 10 ) through which the torque of the driving motor ( 10 ) is controlled, a first conversion unit ( 32 ) in the control device which converts the first braking signal into a desired torque value for the driving motor ( 10 ), a second conversion unit ( 34 ) in the control device which detects and converts an actual torque value of the driving motor ( 10 ) into an actual braking force value and generates an actual braking signal, the braking device being controlled by a braking control device ( 18 ) through a second braking signal, the braking control device ( 18 ) including a comparator device ( 36 ) wherein the first braking signal is compared with the actual braking signal to form the second braking signal for the braking device.