US 12,242,786 B2
Method of transformer
Liping Sun, Shanghai (CN); Hongyang Wu, Shanghai (CN); and Jianjun Ni, Shanghai (CN)
Assigned to Delta Electronics (Shanghai) Co., Ltd., Shanghai (CN)
Filed by Delta Electronics (Shanghai) Co., Ltd., Shanghai (CN)
Filed on Nov. 23, 2021, as Appl. No. 17/456,363.
Claims priority of application No. 202011335188.7 (CN), filed on Nov. 24, 2020.
Prior Publication US 2022/0164512 A1, May 26, 2022
Int. Cl. H01F 30/12 (2006.01); G06F 30/36 (2020.01); G06F 30/367 (2020.01); H02M 1/00 (2007.01); G06F 119/06 (2020.01)
CPC G06F 30/367 (2020.01) [G06F 2119/06 (2020.01)] 18 Claims
OG exemplary drawing
 
1. A design method of a transformer, wherein the transformer comprises at least one secondary winding set, each secondary winding set comprises a plurality of secondary windings; and the method comprises:
repeating following steps until a preset condition is met:
calculating an output voltage of each secondary winding according to a phase shift angle and a number of turns of each secondary winding;
obtaining a difference between output voltages of each secondary winding pair in the secondary winding set;
adjusting the phase shift angle of at least one secondary winding in the secondary winding set; and
obtaining a final number of turns for each secondary winding according to a resultant phase shift angle corresponding to when the preset condition is met,
wherein the preset condition is that the difference between the output voltages of any secondary winding pair in the secondary winding set is less than or equal to a preset threshold;
wherein the adjusting the phase shift angle of at least one secondary winding in the secondary winding set comprises:
adjusting a phase shift angle of an i-th secondary winding in the secondary winding set according to a first preset incremental angle; and
adjusting a phase shift angle of an (i+1)-th secondary winding in the secondary winding set according to the first preset incremental angle if the phase shift angle of the i-th secondary winding has been adjusted according to the first preset incremental angle by more than a preset number of times but the preset condition is still not met,
wherein i is greater than or equal to 1.