When a vehicle is traveling in a state in which an abnormality has occurred in a second resolver, a PWM control unit periodically calculates an estimated electrical angle value of a second motor generator and generates a control command for an inverter using the estimated electrical angle value. The estimated electrical angle value in each cycle can be calculated by correcting an electrical angle estimation error with respect to a sum of an estimated rotation angle change value between cycles and an estimated electrical angle value in a previous cycle. The PWM control unit generates the control command for the inverter such that an output of the inverter is a constant potential while an absolute value of the electrical angle estimation error is greater than a predetermined value during traveling of the vehicle.