Balance control strategy of two-amplitude actively clamped resonant DC-Link inverter clamping voltage

CHEN Qin-ye， ZHANG De-hua， HOU Yao-jie
（College of Electrical Engineering， Zhejiang University， Hangzhou 310027， China）

Abstract： Aiming at the big loss of the traditional clamping voltage balance control strategies，in two-amplitude actively clamped resonant DC-LINK inverter，the work process of DC link was analyzed. In order to keep the clamp capacitor voltage balance the value set in DC-link work， no short-circuit control was proposed.The DC-link of inverter was calculated by Mathcad. The loss of two modes of short-circuit control and no short-circuit control were compared.Under the no short-circuit control and voltage ripple is not be greater than twenty percent，the parameters of the clamp capacitor were calculated. The results indicate that，the micro-power ACRDCLI clamping voltage balance use no short-circuit control，that can reduce the loss of the DC link and can use thin-film capacitor as a clamp capacitor to achieve the micro-power ACRDCLI low loss and long life requirements.
Key words： two amplitude control；resonant DC-link；loss calculation；clamping voltage balance