| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a speed controller for a permanent magnet type synchronous motor which is capable of stable operation by suppressing vibration by simple constitution. <P>SOLUTION: This speed controller which is equipped with a γ-axis current setter 1 that gives a current made to flow to a γ axis, a δ-axis current command computing unit 3 that gives a current made to flow to a δ axis, current detectors 10 and 11, a coordinate converter 12 that converts a current value detected by the current converter into that in a γ-δ coordinate system, a γ-axis current controller 2, a δ-axis current controller 4, a vector computing unit 7, and an inverter 8, calculates a δ-axis current command value iδ<SB>-</SB>ref, based on a formula of iδ<SB>-</SB>ref=-k×Δv, when defined that the amplitude of a voltage command is v, that deviation between this value and the last value of the amplitude value of the voltage command is Δv, and that a proportional coefficient for adjustment is k. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
