| 摘要 |
PURPOSE:To prevent the instruction value error of a primary current vector due to the influence of an iron loss angle by obtaining the iron loss angle respon sive to a primary frequency from a memory. CONSTITUTION:An iron loss angle delta responsive to a primary angular frequency command omega1' is stored in an iron loss angle memory 10. A primary current vector calculator 11 obtains the value of the iron loss angle delta responsive to a primary frequency f1 from the memory 10, and obtains the magnitude ¦I1'¦ of a momentary primary current command and a phase command theta' by consider ing the angle delta. As a result, since the instruction value error of the primary current vector due to the influence of the angle delta can be prevented, an accurate vector control is performed even in a high speed range. |
