| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem of need for making an estimation with an initial value estimating device because errors occur at initial speed and initial secondary magnetic flux estimated value if a primary resistor error occurs at the time of torque control start, in performing torque control of a motor under stopping or inertial rotation with a device having no speed sensor. SOLUTION: A primary resistor identifying means for identifying a primary resistor is provided newly, and a primary resistor identified for the initial value estimating device is used. |
