US 12,381,034 B2
Transformer and transformer machining process
Jiacai Zhuang, Anhui (CN); Jun Xu, Anhui (CN); Wei Liu, Anhui (CN); and Jinguo Su, Anhui (CN)
Assigned to Sungrow Power Supply Co., Ltd., Hefei (CN)
Appl. No. 17/601,920
Filed by Sungrow Power Supply Co., Ltd., Hefei (CN)
PCT Filed May 29, 2020, PCT No. PCT/CN2020/093090
§ 371(c)(1), (2) Date Oct. 6, 2021,
PCT Pub. No. WO2021/098181, PCT Pub. Date May 27, 2021.
Claims priority of application No. 201911149325.5 (CN), filed on Nov. 21, 2019.
Prior Publication US 2022/0148797 A1, May 12, 2022
Int. Cl. H01F 27/32 (2006.01); H01F 27/24 (2006.01); H01F 27/28 (2006.01); H01F 41/12 (2006.01)
CPC H01F 27/327 (2013.01) [H01F 27/24 (2013.01); H01F 27/2876 (2013.01); H01F 41/127 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A transformer, comprising two coil units arranged side by side, wherein each of the two coil units comprises an inner coil and an outer coil sleeved outside the inner coil, the outer coil is wrapped with an outer coil semi-conductive layer, the inner coil is wrapped with an inner coil semi-conductive layer, and each of the two coil units is integrally cast with an insulating layer; and wherein
the transformer further comprises an iron core, wherein the inner coil semi-conductive layer and the iron core are spaced to form an air flow channel.