A hybrid vehicle system comprising: an internal-combustion engine ; a first electric motor ; a three-axis power split mechanism that distributes power of the internal-combustion engine to the first electric motor and a power coupling mechanism ; a second electric motor connected to the power coupling mechanism ; an axle that is driven with energy that is supplied from the power coupling mechanism ; a first inverter that drives the first electric motor ; a second inverter that is connected to the first inverter via a DC link and drives the second electric motor ; a rechargeable battery (BT) connected to the DC link; an anti-slip controller that outputs a torque command difference (ΔTref) such that output torque of the axle is lowered when slipping of a wheel (WL) that rotates with power from the axle is detected; a first controller that computes a torque command (T MG1 ') of the first electric motor and a torque command (T MG2 ') of the second electric motor such that torque output from the axle is equal to an axle torque command (Tref); a second controller that receives the torque command difference (ΔTref) and computes a torque command difference (ΔT MG1 ) of the first electric motor and a torque command difference (ΔT MG2 ) of the second electric motor such that a difference between energy consumption of the first electric motor and energy consumption of the second electric motor is zero; a first adder that adds the torque command (T MG1 ') of the first electric motor and the torque command difference (ΔT MG1 ) of the first electric motor so as to output obtained torque to the first inverter ; and a second adder that adds the torque command (T MG2 ') of the second electric motor and the torque command difference (ΔT MG2 ) of the second electric motor so as to output obtained torque to the second inverter . an internal-combustion engine ; a first electric motor ; a three-axis power split mechanism that distributes power of the internal-combustion engine to the first electric motor and a power coupling mechanism ; a second electric motor connected to the power coupling mechanism ; an axle that is driven with energy that is supplied from the power coupling mechanism ; a first inverter that drives the first electric motor ; a second inverter that is connected to the first inverter via a DC link and drives the second electric motor ; a rechargeable battery (BT) connected to the DC link; an anti-slip controller that outputs a torque command difference (ΔTref) such that output torque of the axle is lowered when slipping of a wheel (WL) that rotates with power from the axle is detected; a first controller that computes a torque command (T MG1 ') of the first electric motor and a torque command (T MG2 ') of the second electric motor such that torque output from the axle is equal to an axle torque command (Tref); a second controller that receives the torque command difference (ΔTref) and computes a torque command difference (ΔT MG1 ) of the first electric motor and a torque command difference (ΔT MG2 ) of the second electric motor such that a difference between energy consumption of the first electric motor and energy consumption of the second electric motor is zero; a first adder that adds the torque command (T MG1 ') of the first electric motor and the torque command difference (ΔT MG1 ) of the first electric motor so as to output obtained torque to the first inverter ; and a second adder that adds the torque command (T MG2 ') of the second electric motor and the torque command difference (ΔT MG2 ) of the second electric motor so as to output obtained torque to the second inverter . <EOS>