| 摘要 |
PROBLEM TO BE SOLVED: To facilitate, in a short time, current distribution of dq axes for variable speed control of an embedded magnet type synchronous motor using a PWM power converter. SOLUTION: A current command Ic, calculated on the basis of speed deviation of a detected speed signal ωm and a speed command signal ωmc of an IMP motor 1, is distributed to a d-axis current command Id and a q-axis current command Iq which are two orthogonal vector components. That is, the d-axis current command Id and the q-axis current command Iq are calculated by using an equation of Id=|Ic|.cosϕ and an equation Iq=Ic.sinϕ(where ϕ is the electric angle between the d-axis and the current command Ic). Thereby the d-axis current command Id and the q-axis current command Iq can be obtained easily and in a short time. |
