Preventive function control in an electromagnetic spring pressure brake

US11869713B2 · kind B2 · utility

Assignee

• CHR.MAYR GMBH + CO. KG · DE

Inventors

• Harald Heumoos · Dietmannsried, DE
• Matthias Kramkowski · Steingaden, DE
• Andreas Marten · Baisweil, DE
• Frank Timmler · Galgen, DE
• Karl Unsin · Beckstetten, DE

Key dates

• Filing date: Sep 27, 2019
• Grant date: Jan 9, 2024
• Expiry date: Jun 20, 2040

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16D2121/22
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

Preventative function control in electromagnetic spring pressure brakes is disclosed. Initially, the spring pressure brake is controlled by voltage. Next, state variables current and voltage are measured. Subsequently, a determination variable is determined and summed over a first range, which extends from a starting point of actuation to a point at which an armature disk begins to move. At the point, current value is detected at which movement of the armature disk begins. The determination variable is summed over a second range, which extends from the starting point, when the current reaches the value detected above, up to a constant current. Subsequently, a ratio is calculated from the sum of the determination variable over the range to the sum of the determination variable over the first and second ranges. Upon reaching a predetermined value by the value of the ratio, a state signal is output.