Travel driving apparatus of vehicle

A travel driving apparatus for a vehicle, comprising:

• an electrical motor which regenerates power by use of rotating force of a driving wheel of a vehicle, and exerts regenerative braking force;
• a battery mounted on the vehicle;
• a transformer for transforming the power regenerated by the electrical motor and supplying the power to the battery, wherein maximum input/output power is limited based on a temperature condition;
• a regenerative braking force selecting section for setting a magnitude of regenerative braking force in such a way to be changed stepwisely;
• and
• a regenerative braking force computing section for decreasing the regenerative braking force to be less than regenerative braking force while the transformer is not limited, when a selection stage in which regenerative braking force increases more than in a predetermined selection stage is selected by the regenerative braking force selecting section while the transformer is limited.