ZHANG Tao

 

(EAST Group Co.,Ltd., DongGuan 523808, China)

 

 

Abstract: Aiming at the demand of charger applied in UPS, a scheme design of charger for control system based on dual buck converter was proposed. The small signal mathematics model in CCM mode was built after introducing the topology and control architecture of charger in detail, and the control parameters was given with the transfer function deducing of current inner loop and voltage outer loop. A prototype based on TMS320F28335 DSP was designed for experiment under different condition. The results indicate that the system is stable and better satisfy the demand of charger, further validates the effectiveness and feasibility of control loop parameter design of charger.

 

Key words: uninterruptible power supply (UPS); charger; buck converter