| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a motor controller for a sensorless electric oil pump which can perform stable control. <P>SOLUTION: A motor controller for an electric oil pump comprises: a oil supply switching mechanism for selecting oil supply from a mechanical and electrical oil pumps; control command generation means for providing a sum signal of a signal determining motor torque and a signal determined by a speed deviation of a motor, by using oil supply information from a higher-level controller; and motor control means for executing vector control from the difference between an output of the control command generation means and load current of a sensorless motor. In a first stage of starting the motor, the motor is started by a signal keeping torque constant; in a second stage, the motor is driven by a current feedback signal having a target value which is the sum of the signal keeping torque constant and a signal based on the speed deviation; and in a third stage, the motor is driven by the current feedback signal by a current command signal determined from target values of torque and speed determined by using oil supply information from the higher-level controller. <P>COPYRIGHT: (C)2012,JPO&INPIT |
