| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electric motor vehicle using a DC brushless motor, capable of achieving regenerative control with ease and high accuracy for cases where rotational speed is idling speed or more. <P>SOLUTION: The fact that the rotational speed is higher than the idling speed is determined when the regenerative duty ratio is 0%, for example. In such a case, the regenerative current is controlled by inserting a core to increase the magnetic field when the detected regenerative current is less than the targeted regenerative current and by removing the core to decrease the magnetic field when the detected regenerative current is greater than the targeted regenerative current. This prevents overspeed and enables the rotational speed in travelling over the idling speed to be appropriately adjusted based on the regenerative current. This control is effectively performed in such a simple structure as to increase or decrease a distance between a stator and a rotor, thereby achieving the regenerative control with facility and high accuracy. <P>COPYRIGHT: (C)2009,JPO&INPIT |
