| 摘要 |
PURPOSE:To suppress fluctuation of speed of a motor by detecting harmonic components existing in the actual speed fluctuation mode of the motor through a harmonic component detecting means then regulating current or voltage command to be applied onto a driver, through an electronic means, such that the harmonic components are removed or reduced. CONSTITUTION:Random harmonic component existing in a speed signal nf or a speed difference signal ne is calculated and subjected to P control or PI control thus producing a correction signal for changing a current command Is. In other words, gain of the control system is varied by the harmonics existing in the speed signal. 10A, 10B, 10n represent n1 order component detecting means, n2 order component detecting means, and nk order component detecting means, respectively. PI control elements are connected with respective detecting means and output signals therefrom, i.e., correction signals, are collected then reference 1 is added thereto and the sum is multiplied by the current command IS. Random harmonic component and the number thereof, to be detected, can be varied freely for individual objective motor. |
