US 12,456,591 B2
Driving system for an on-load tap changer
Borislav Vasilev, Sofia (BG); Georgi Manev, Sofia (BG); Veselin Nikolov, Sofia (BG); and Angel Mihaylov, Plovdiv (BG)
Assigned to HITACHI ENERGY LTD, Zürich (CH)
Appl. No. 18/273,621
Filed by HITACHI ENERGY LTD, Zürich (CH)
PCT Filed Feb. 15, 2022, PCT No. PCT/EP2022/053680
§ 371(c)(1), (2) Date Jul. 21, 2023,
PCT Pub. No. WO2023/280443, PCT Pub. Date Jan. 12, 2023.
Claims priority of application No. 21184035 (EP), filed on Jul. 6, 2021.
Prior Publication US 2024/0079190 A1, Mar. 7, 2024
Int. Cl. H01H 9/00 (2006.01)
CPC H01H 9/0027 (2013.01) [H01H 9/0038 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A driving system for an on-load tap changer, comprising:
a vacuum interrupter driving mechanism configured to drive a vacuum interrupter of the on-load tap changer;
an energy accumulation mechanism mechanically coupled with the vacuum interrupter driving mechanism; and
a flywheel mechanism mechanically coupled with the vacuum interrupter driving mechanism, wherein the flywheel mechanism comprises a flywheel which is configured as an annular rounded flywheel, such that there is a free space inside the annulus of the annular rounded flywheel when coupled to the vacuum interrupter driving mechanism,
wherein the energy accumulation mechanism is mechanically coupled with a primary driving unit and the energy accumulation mechanism is configured to accumulate and release energy for combined motion of the vacuum interrupter driving mechanism and the flywheel mechanism, and
wherein the vacuum interrupter driving mechanism and the flywheel mechanism are arranged along a main driving axis and the flywheel is concentrically arranged around the main driving axis.