| 摘要 |
PURPOSE:To obtain a current controller for a power transducer, capable of attaining an objective value stably, by a method wherein a near future value is estimated from the past behavior of a main circuit current value while the estimated near future value is employed as the feedback value of the current. CONSTITUTION:At first, the feedback value 14 of current is acquired and is stored in a data temporary storing RAM 11. Next, the estimated feedback value of current in next sampling period is estimated and operated by employing the feedback value 14 of current, acquired in the present sampling period, and the feedback values of the current, acquired and stored in the temporary storing RAM 11 in previous sampling period and before previous sampling periods. Subsequently, a difference between a current commanding value 17 and the estimated current feedback value is operated. The phase angle of a gate pulse is operated by the result of the operation and is set in a gate pulse generator 12. |
