Electric bicycle with an electric engine powered by an electric accumulator and adapted for propelling the electric bicycle, comprising: - a frame, - a front wheel mounted on the frame, - a rear wheel mounted on the frame, - an electromagnetic assembly comprising at least one electromagnet, - an electric converter electrically connected to said electromagnetic assembly and to said electric accumulator such as to charge said electric accumulator thanks to electric energy received from said electromagnetic assembly, and - an electronic control unit; wherein - said front wheel and/or said rear wheel comprises a plurality of magnets arranged at a peripheral region of the wheel; characterized in that the electric bicycle comprises at least one pedaling sensor; the electromagnetic assembly comprises at least one electric actuator adapted for radially and/ or axially changing a position of said at least one electromagnet with respect to said front wheel or said rear wheel; - said at least one electromagnet is fixed or bound to the frame, and it is positioned such as to magnetically interact with said plurality of magnets differently depending on said position; and the electronic control unit is: - adapted for controlling said at least one electric actuator such as to regulate magnetic interaction between said at least one electromagnet of said electromagnetic assembly and said plurality of magnets, and consequently regulate electric energy received by said electromagnetic assembly, and consequently regulate a charging energy flow of said electric accumulator; - adapted for controlling said at least one electric actuator such as to determine the charging energy flow of said electric accumulator when said at least one pedaling sensor detects pedaling; - and adapted for setting said charging energy flow as a function of data or information received by a user of the electric bicycle. - a frame, - a front wheel mounted on the frame, - a rear wheel mounted on the frame, - an electromagnetic assembly comprising at least one electromagnet, - an electric converter electrically connected to said electromagnetic assembly and to said electric accumulator such as to charge said electric accumulator thanks to electric energy received from said electromagnetic assembly, and - an electronic control unit; wherein - said front wheel and/or said rear wheel comprises a plurality of magnets arranged at a peripheral region of the wheel; characterized in that the electric bicycle comprises at least one pedaling sensor; the electromagnetic assembly comprises at least one electric actuator adapted for radially and/ or axially changing a position of said at least one electromagnet with respect to said front wheel or said rear wheel; characterized in that the electric bicycle comprises at least one pedaling sensor; the electromagnetic assembly comprises at least one electric actuator adapted for radially and/ or axially changing a position of said at least one electromagnet with respect to said front wheel or said rear wheel; - said at least one electromagnet is fixed or bound to the frame, and it is positioned such as to magnetically interact with said plurality of magnets differently depending on said position; and the electronic control unit is: - adapted for controlling said at least one electric actuator such as to regulate magnetic interaction between said at least one electromagnet of said electromagnetic assembly and said plurality of magnets, and consequently regulate electric energy received by said electromagnetic assembly, and consequently regulate a charging energy flow of said electric accumulator; - adapted for controlling said at least one electric actuator such as to determine the charging energy flow of said electric accumulator when said at least one pedaling sensor detects pedaling; - and adapted for setting said charging energy flow as a function of data or information received by a user of the electric bicycle. - adapted for controlling said at least one electric actuator such as to regulate magnetic interaction between said at least one electromagnet of said electromagnetic assembly and said plurality of magnets, and consequently regulate electric energy received by said electromagnetic assembly, and consequently regulate a charging energy flow of said electric accumulator; - adapted for controlling said at least one electric actuator such as to determine the charging energy flow of said electric accumulator when said at least one pedaling sensor detects pedaling; - and adapted for setting said charging energy flow as a function of data or information received by a user of the electric bicycle.