US 12,266,921 B2
Installation including a stored energy source and an electric motor which can be fed by an inverter, and method for operating an installation
Dominik Hecht, Waldburg (DE); and Hubert Heine, Eberhardzell (DE)
Assigned to SEW-EURODRIVE GMBH & CO. KG, Bruchsal (DE)
Appl. No. 17/779,820
Filed by SEW-EURODRIVE GMBH & CO. KG, Bruchsal (DE)
PCT Filed Nov. 3, 2020, PCT No. PCT/EP2020/025485
§ 371(c)(1), (2) Date May 25, 2022,
PCT Pub. No. WO2021/104664, PCT Pub. Date Jun. 3, 2021.
Claims priority of application No. 102019008309.1 (DE), filed on Nov. 29, 2019.
Prior Publication US 2023/0031711 A1, Feb. 2, 2023
Int. Cl. H02H 7/122 (2006.01)
CPC H02H 7/1225 (2013.01) [H02H 7/1222 (2013.01)] 25 Claims
OG exemplary drawing
 
1. An installation, comprising:
a stored energy source;
a first fuse;
a further fuse, the stored energy source, the first fuse, and the further fuse arranged as an electrical series circuit;
a controllable contact arranged in parallel to the further fuse;
a voltage detection device adapted to detect a voltage applied to the series circuit connected to control electronics adapted to generate a control signal for the controllable contact; and
an electric motor selectively operatable as a motor or as a generator;
wherein the control electronics is adapted to open the controllable contact, during motor operation, as a function of a voltage detected at a DC-voltage-side connection of an inverter; and
wherein the control electronics is adapted to detect a motor current at an AC-voltage-side connection of the inverter and to control and/or close the controllable contact, during generator operation, as a function of a value of voltage present at the DC-voltage-side connection of the inverter that is determined at a future time relative to a current time within a time interval.