CONTROLLER FOR A MOVABLE MOTOR VEHICLE HEADLAMP MECHANISM

CONTROLLER FOR A MOVABLE MOTOR VEHICLE HEADLAMP MECHANISM A control unit for operating the motor of a motor driven headlamp carrier mechanism includes oscillator circuitry for generating a series of pulses for energizing the motor, voltage responsive means for sensing a motor counter-EMF related vol...

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Bibliographic Details
Main Author CRAIG, GALE M
Format Patent
LanguageEnglish
French
Published 19.08.1986
Edition4
Subjects
ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING ORSUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES INGENERAL
PERFORMING OPERATIONS
TRANSPORTING
VEHICLES IN GENERAL
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Summary:CONTROLLER FOR A MOVABLE MOTOR VEHICLE HEADLAMP MECHANISM A control unit for operating the motor of a motor driven headlamp carrier mechanism includes oscillator circuitry for generating a series of pulses for energizing the motor, voltage responsive means for sensing a motor counter-EMF related voltage as an indication of motor rotation, output circuitry for interrupting motor energization when the voltage responsive circuitry senses motor stall, and start circuitry for energizing the motor independent of the oscillator circuitry for a period of time sufficient to produce motor counter EMF. Such control permits sensing of the engagement of the headlamp carrier with fixed mechanical stops without the use of position or torque limit switches.
Bibliography:Application Number: CA19840467421