Abstract: A steering apparatus for steering wheels (1) of a vehicle (2) comprises support means (4) arranged for supporting said wheels (1), driving means (27) arranged for rotating said support means (4) around respective longitudinal axis means (Z) and connecting means arranged for connecting said driving means (27) with said support means (4), said connecting means comprising transmission gear means (26); a vehicle comprises steered wheel means (1) and steering means (3) arranged for controlling said steered wheel means (1), said steering means (3) comprising support means (4) arranged for supporting said steered wheel means (1), driving means (27) arranged for rotating said support means (4) around respective longitudinal axis means (Z) and connecting means arranged for connecting said driving means (27) with said support means (4) , said connecting means comprising transmission gear means (26).

Abstract: A method for the control of a wound rotor synchronous motor comprises measuring a plurality of electromagnetic entities indicative of the operation of the motor, generating voltage on a stator of the motor to obtain a stator current, further generating a further voltage on the rotor to obtain a rotor current, before the generating and the further generating, the entities being processed to calculate references for the stator current and for the rotor current, the references corresponding to the generation by the motor of the maximum torque obtainable per ampere of stator current supplied.

Abstract: A method for the control of a wound rotor synchronous motor comprises measuring a plurality of electromagnetic entities indicative of the operation of said motor, generating voltage on a stator of said motor to obtain a stator current, further generating a further voltage on said rotor to obtain a rotor current, before said generating and said further generating, said entities being processed to calculate references for said stator current and for said rotor current, said references corresponding to the generation by said motor of the maximum torque obtainable per ampere of stator current supplied.

Abstract: A steering apparatus for steering wheels (1) of a vehicle (2) comprises support means (4) arranged for supporting said wheels (1), driving means (27) arranged for rotating said support means (4) around respective longitudinal axis means (Z) and connecting means arranged for connecting said driving means (27) with said support means (4), said connecting means comprising transmission gear means (26); a vehicle comprises steered wheel means (1) and steering means (3) arranged for controlling said steered wheel means (1), said steering means (3) comprising support means (4) arranged for supporting said steered wheel means (1), driving means (27) arranged for rotating said support means (4) around respective longitudinal axis means (Z) and connecting means arranged for connecting said driving means (27) with said support means (4), said connecting means comprising transmission gear means (26).

Abstract: The four-wheeled lift truck has a tight turning radius and improved stability, and is of the type having front wheels with independent powerplants. The rear turning wheels are mounted below the stems of respective hydraulic jacks that have vertical axes and are rigidly coupled to the chassis of the truck. The hydraulic circuits of the jacks are connected to one another, so that the lowering of one wheel is matched by a rise of the other. The stems of the jacks are interconnected by an articulation mechanism which mutually coordinates the turning angles of the wheels to move the maximum turning center to the intersection between the fixed axis of the front driving wheels and the centerline plane of the truck.