滞环电流控制型双BUCK逆变器

Hysteresis Current Controled Dual Buck Half Bridge Inverter

研究了一种新颖的双BUCK逆变电路(DBI)。该逆变电路克服了传统逆变器的直通问题,功率开关管和功率二极管可以分别得到最优设计。采用滞环电流控制的双BUCK逆变电路(HCDBI),消除了采用斜坡交截SPWM控制的DBI正常工作所必需的偏置电流,进一步提高了效率;且具有优良的动态性能。试验证明HCDBI可实现较高的效率和开关频率,稳态和瞬态性能比传统逆变电路都有很大的提高,具有广泛的应用前景。

A novel dual buck half bridge inverter (DBI) is introduced in this paper. This topology overcomes the shootthrough problem in traditional inverter. The switch and diode can be designed separately. The existence of discontinuous conduction mode operation state requires the bias of inductor current for DBI implemented with linear controllers like ramp comparison SPWM controllers. A novel operation scheme for DBI and a hysteresis current controlled dual buck half bridge inverter (HCDBI) are proposed .The bias current is eliminated and conduction losses are dramatically reduced. Experiment Verifies that high efficiency and good dynamic performance can be obtained by using this inverter. Its excellent high frequency operational capacity provides another access to realize high frequency operation of inverters.