Sensorless BEMF measurement in current-controlled brushless motors

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...

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Bibliographic Details
Main Author Stoeger Christian
Format Patent
LanguageEnglish
Published 01.11.2016
Subjects
ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING ORSUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES INGENERAL
CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS
CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
GENERATION
PERFORMING OPERATIONS
TRANSPORTING
VEHICLES IN GENERAL
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Summary: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.
Bibliography:Application Number: US201514722349