三相交錯式升壓電路電流平衡控制之分析與實現

Abstract

In the field of power electronics, application of interleaving technique can be traced back to very early days both in high power conversion as well as in low power conversion. For three-phase interleaved boost converters, both voltage regulation and current balance are important. In pursuance of avoiding the effects of the current imbalance on the system reliability and thermal stress, the current balancing control method is crucial. However, current balancing techniques should not affect the voltage-regulation loop. Therefore, a decoupled current-balancing control (DCBC) is required. That is, independent PI-type controllers are designed to implement the voltage regulation controller and the current balance controller. In this thesis four different current balancing strategies are presented. The small-signal transfer function for all strategies are derived and compared. The DCBC strategy is further carried out for experiments. The results show that the voltage regulation loop and the current balancing loops are decoupled. All the controllers are implemented in Field Programmable Gate Array (FPGA) system. The provided simulation and experimental results verify the proposed current balancing control.

In the field of power electronics, application of interleaving technique can be traced back to very early days both in high power conversion as well as in low power conversion. For three-phase interleaved boost converters, both voltage regulation and current balance are important. In pursuance of avoiding the effects of the current imbalance on the system reliability and thermal stress, the current balancing control method is crucial. However, current balancing techniques should not affect the voltage-regulation loop. Therefore, a decoupled current-balancing control (DCBC) is required. That is, independent PI-type controllers are designed to implement the voltage regulation controller and the current balance controller. In this thesis four different current balancing strategies are presented. The small-signal transfer function for all strategies are derived and compared. The DCBC strategy is further carried out for experiments. The results show that the voltage regulation loop and the current balancing loops are decoupled. All the controllers are implemented in Field Programmable Gate Array (FPGA) system. The provided simulation and experimental results verify the proposed current balancing control.