| 摘要 |
PROBLEM TO BE SOLVED: To provide a vector control method that gives a function for enhancing stability to a drive control system using magnetic pole position estimation equipment or a magnetic pole position detector causing a detection error for specifying a rotor magnetic pole position and easily achieves the function. SOLUTION: A new command converter 9 is prepared to select the (d) axis of rectangular dq coordinates system to the center direction or its estimation direction of the rotor permanent magnet N pole of a permanent magnet synchronous motor. At the same time simultaneously changes a d-axis current command value and a q-axis current command value according to rotor speed and a torque command value, a positive d-axis current command value is generated according to the absolute value of the rotor speed of a d-axis current command generator 9a, while generating the q-axis current command value while being proportional to the torque command value of a q-axis current command generator 9b, thus controlling an armature current so that the absolute value of the spatial phase difference of current vector for the center of the rotor magnetic pole N pole becomes less than π/2 (rad) for solving problems. |
