A method for determining a reserve torque in an electronically-switched drive mechanism, specifically a pulse motor for a headlamp beam adjustment system, based upon a parameter in an essentially linear relationship to a back electromotive force of the drive mechanism. Whereby, for the determination of the back electromotive force-related parameter, the variation in the drive current is determined in relation to a change interval.
Sensorless BEMF measurement in current-controlled brushless motors
2015-12-03
Patent
Electronic Resource
English
IPC: | H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern / B60Q ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL , Anordnung von Signal- oder Beleuchtungsvorrichtungen, deren Einbau oder Halterung oder deren Schaltkreise bei Fahrzeugen allgemein |
Sensorless BEMF measurement in current-controlled brushless motors
European Patent Office | 2016
|Sensorless load angle detection for brushless direct current and stepping motors
BASE | 2020
|A sensorless drive system for brushless DC motors using a digital phase-locked loop
Online Contents | 2003
|