| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an "efficient vector controller for permanent-magnet motors" that makes it possible to minimize a current with the same torque, even when a setting error (R-R<SP>*</SP>) for resistance is present in an inexpensive system for current detection or a system with a position detector omitted. <P>SOLUTION: Even when a d-axis current command value is set to "zero", a virtual inductance value computed from a q-axis current detection value is used in computation of an output voltage value or computation for estimating a phase error. As a result, even when a setting error (R-R<SP>*</SP>) for resistance is present, a current can be minimized with the same torque, and an "efficient vector controller for permanent-magnet motors" can be provided. <P>COPYRIGHT: (C)2008,JPO&INPIT |
