| 摘要 |
PURPOSE:To simplify the control circuit structure by making it possible to stop the stator current vector or to rotate the same only in the forward direction. CONSTITUTION:Current control device 1 feeds the DC current value specified by input command signal 2 to terminals 3, 4. In current control device 1, rectifier 6 rectifies three-phase AC 5 and feeds a DC output to terminals 3, 4. Adjuster 8 converts the current value detected by current detector 7 into control signal 9 suitable for the control circuit. Error detector 10 outputs error signal 11 indicating a difference between current command signal 2 and detected current signal 9. Phase adjuster 33 receives signals 31 and 32 from phase calculator 30 and processes them. Its output 34 produces main circuit phase command theta11 of the stator current vector. The main circuit phase instruction theta1134 changes following up the stator current vector phase instruction theta131 as the input only in the increasing direction. |
