A hybrid electric architecture for a vehicle, in particular a work vehicle, the architecture comprising an internal combustion engine, a first electric machine suitable for operating at least as a generator, a planetary gear, and a transmission having an input shaft and an output shaft, the output shaft being adapted to be coupled to an axle of the vehicle, wherein the planetary gear includes a first member, a second member, and a third member that are each comprising a corresponding one of a sun gear, a ring gear, and a planet carrier, the architecture further comprising: - first means (16, 17, 18) to mechanically connect the first member, the second member, and the third member respectively to said engine, the first electric machine, and the input shaft; - a second electric machine distinct from the first electric machine and suitable for operating at least as a motor; - second means to mechanically connect the second electric machine to the transmission, such that a first drive torque from the third member and a second drive torque from the second electric machine are supplied in parallel to the transmission; and - a control unit configured to control the engine, the first electric machine, and the second electric machine; wherein the transmission includes: - a gearbox for establishing a plurality of gear ratios between the input shaft and the output shaft; and - shifting means for engaging each of the gear ratios; the control unit being further configured to control said shifting means; wherein said second means are configured to mechanically connect the second electric machine to the input shaft; characterized in that the hybrid electric architecture further comprises a third electric machine suitable for operating at least as a motor and third means to mechanically connect the third electric machine to the output shaft, the control unit being further configured to control the third electric machine, which is distinct from the second electric machine. wherein the planetary gear includes a first member, a second member, and a third member that are each comprising a corresponding one of a sun gear, a ring gear, and a planet carrier, the architecture further comprising: - first means (16, 17, 18) to mechanically connect the first member, the second member, and the third member respectively to said engine, the first electric machine, and the input shaft; - a second electric machine distinct from the first electric machine and suitable for operating at least as a motor; - second means to mechanically connect the second electric machine to the transmission, such that a first drive torque from the third member and a second drive torque from the second electric machine are supplied in parallel to the transmission; and - a control unit configured to control the engine, the first electric machine, and the second electric machine; - first means (16, 17, 18) to mechanically connect the first member, the second member, and the third member respectively to said engine, the first electric machine, and the input shaft; - a second electric machine distinct from the first electric machine and suitable for operating at least as a motor; - second means to mechanically connect the second electric machine to the transmission, such that a first drive torque from the third member and a second drive torque from the second electric machine are supplied in parallel to the transmission; and - a control unit configured to control the engine, the first electric machine, and the second electric machine; wherein the transmission includes: - a gearbox for establishing a plurality of gear ratios between the input shaft and the output shaft; and - shifting means for engaging each of the gear ratios; - a gearbox for establishing a plurality of gear ratios between the input shaft and the output shaft; and - shifting means for engaging each of the gear ratios; the control unit being further configured to control said shifting means; wherein said second means are configured to mechanically connect the second electric machine to the input shaft; characterized in that the hybrid electric architecture further comprises a third electric machine suitable for operating at least as a motor and third means to mechanically connect the third electric machine to the output shaft, the control unit being further configured to control the third electric machine, which is distinct from the second electric machine.