Comparison between Phase-Shift Full-Bridge Converters with Noncoupled and Coupled Current-Doubler Rectifier

Table 1

Comparison between NCDR and CCDR.

	NCDR	CCDR
Voltage gain	𝑉𝑜𝑉sec=𝐷2	𝑉𝑜𝑉sec=2𝐷𝑛(1+𝑛)
Output current ripple	𝑖𝑜(ripple)=(1−2𝐷)𝑉𝑜2𝐿𝑓𝑠	𝑖𝑜(ripple)=(1+𝑛)2𝑉−2𝐷^𝑜𝐿𝑓𝑠
Diode voltage stress	𝑉𝐷𝑟1=𝑉𝐷𝑟2 = 𝑉sec+𝑉𝑜2	𝑉𝐷𝑟1=𝑉𝐷𝑟2 = 𝑉sec𝑛
Peak current of transformer secondary winding	𝑖sec(peak)=𝐼𝑜2+𝑉sec−𝑉𝑜2𝐿𝐷𝑇𝑠	𝑖sec(peak)=𝑉sec−𝑛𝑉𝑜𝑛^2𝐿𝐷𝑇𝑆𝑛2𝑛1−𝑉𝑜𝐿