Method for detecting start of armature stroke of electromagnetic actuator and motor system

• Main Authors: KRASTEV BORIS, KLINGER THOMAS
• Format: Patent
• Language: Chinese; English
• Published: 04.11.2022
• Subjects: BLASTING; ENGINE PLANTS IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; STEAM ENGINES; WEAPONS

The invention relates to a method for detecting the start of an armature stroke of an electromagnetic actuator comprising a coil and an armature which can be moved therein by applying a voltage (U) to the coil (221), in which method a current profile (VMod) is measured during energization of the coil, for which purpose a current value of a current in the coil is measured at a plurality of points in time, in addition, the current curve (VMod) during the energization of the coil is modeled per time point (t0, t1, t2) in that the modeled value of the current at a time point is determined from the modeled value of the current at a previous time point and the time derivative (di/dt) of the current curve measured at the previous time point, and wherein the current curve (VMod) is modeled by the modeled value of the current at the previous time point and the time derivative (di/dt) of the current curve measured at the previous time point. The point in time (tBMP) at which the armature travel starts is inferred from