フィードバック型正弦波インバータの最適スイッチング制御の一方式

概要

論文の詳細を見る
High power electrical conversion, sinusoidal inverter which converts dc source to ac source has been widely employed in such as the ac motor drive control systems. The off-line calculated optimal pulse width modulation (PWM) scheme has been proposed so far. By this scheme, the following high performances are available. 1) selective lower-order harmanics elimination. 2) adjusting the fundamental part to the desired amplitude. 3) the reduction in switching losses and the size of dc link filter. However, in practice, the fluctuation in dc voltage caused by the inevitably uncertainty of ac load offers poorr performance to ac output such as the remaining of error between its fundamental part and the desired value.In this paper, we propose an optimum switching control real-time scheme using the output feedback. This scheme attempts to adjust the switching angles of each period so that the cost function which measures the specific lower-order harmonics and fundamental harmonic error is minimized. Basicaly, it is difficult to control such switching angles because the cost function is nonlinear in the switching angles. To avoid such this problem the virtual pulseamplitude-modulation (VPAM) is introduced. Instead of calculation the switching angles directly we calculate the amplitudes of VPAM that linear for the cost function first. The switching angles or PWM, now, are calculated by approximation its pulsewidth with the pulseamplitude of this VPAM. The simulation and experiment are performed and these results show the effectiveness of proposed scheme.
社団法人電気学会の論文

フィードバック型正弦波インバータの最適スイッチング制御の一方式

スポンサーリンク

概要

著者

関連論文

スポンサーリンク