Patent ID: 6437456
Filing Date: 2002-08-20
Classification: B60K,B60W,F02D,Y02T,Y10S

Abstract:
A power output apparatus comprising:a motor for outputting power; a generator for generating electric power using at least part of the power output by the motor; an electric motor operated such that the power output to a drive shaft becomes a desired power using generated electric power or electric power accumulated after generation of electric power; and a controller for obtaining power required of the motor based on a predetermined parameter and controlling an operating point of the motor based on the required power, wherein the controller sets beforehand a predetermined operation line lower in torque than a maximum torque line obtained by plotting a maximum torque for each rotation speed in a relation between the motor rotation speed and torque as a reference operation line for controlling the motor operating point, and controls to move the motor operating point along the reference operation line based on the obtained required power in a steady state; and controls the motor operating point such that power output from the motor becomes equal to the required power by increasing the motor torque while substantially maintaining the motor rotation speed irrespective of the reference operation line when the obtained required power increases.