| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a control method and a controller of a motor in which sensorless control can be applied without complicating control while increasing the number of revolutions so as to switch to stabilized sensorless control in other system operation. <P>SOLUTION: In the method of controlling a synchronous motor 200 by sensorless driving, an applied voltage vao is determined such that the current of the synchronous motor 200 has a predetermined level in the beginning of start-up for performing forced operation or at low speed, voltages eα and eβ induced through rotation of the synchronous motor 200 are estimated. Furthermore, first voltage vectors vα1 and vβ1 correlated with the applied voltage vao and second voltage vectors vα2 and vβ2 correlated with the induced voltages eα and eβ are synthesized and applied to the synchronous motor 200. <P>COPYRIGHT: (C)2008,JPO&INPIT |
