US 12,286,987 B2
Method for operating an electric motor, delivery pump, motor vehicle having a delivery pump of said type, computer program, and computer-readable medium
Bjoern Bartholmai, Munich (DE); Wolf Goetze, Munich (DE); Klemens Kieninger, Munich (DE); and Matthias Fischer, Munich (DE)
Assigned to Vitesco Technologies GmbH, Regensburg (DE)
Filed by Vitesco Technologies GmbH, Regensburg (DE)
Filed on Sep. 28, 2022, as Appl. No. 17/955,038.
Claims priority of application No. 10 2021 211 175.0 (DE), filed on Oct. 4, 2021.
Prior Publication US 2023/0103970 A1, Apr. 6, 2023
Int. Cl. F15B 21/08 (2006.01); F15B 21/00 (2006.01)
CPC F15B 21/008 (2013.01) [F15B 21/08 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method for operating an electric motor that drives a displacement pump stage to deliver a liquid through a hydraulic system and supply the liquid to at least one consumer, comprising
compensating, at least partially, a periodically repeating pressure fluctuation of the liquid that occurs during delivery operation; and
manipulating a rotational speed of the electric motor in accordance with the periodically repeating pressure fluctuation,
wherein a time, a time period, and/or a magnitude of the manipulation of the rotational speed is determined by the periodically repeating pressure fluctuation of the liquid,
wherein the time, the time period, and/or the magnitude of the manipulation of the rotational speed is specified by at least one pressure sensor that ascertains the periodically repeating pressure fluctuation of the liquid at an outlet of the displacement pump stage, in the hydraulic system and/or at the at least one consumer.