Back to results
US 12,348,164 B2Granted
End position detection of actuators
AssigneeAudi AG
InventorBernhard Schwantner
Life of this patent
Estimating the term…
Abstract
The present disclosure relates to a method and a device for end position detection of actuators.
Claims8
A method for detection of an end position of an actuator moved by an electric motor, the method comprising:
- actuating the electric motor using signal pulses;
- adding measured mutual induction voltages that are generated by the actuating;
- and
- detecting the end position in response to determining that a sum of the measured mutual induction voltages reaches a given value;
- and
- halting movement of the actuator upon detecting the end position in response to determining that the sum of the measured mutual induction voltages reaches the given value.
3 more elements
A module, comprising:
- a controller;
- at least one electric motor;
- and
- at least one actuator that is movable by the at least one electric motor,
- wherein the controller includes a semiconductor full bridge connected to the at least one electric motor, and a read back input connected to a plurality of outputs of the semiconductor full bridge,
- wherein the read back input forwards a plurality of mutual induction voltages to an analog-to-digital (A/D) converter of the controller, and
- wherein the controller, in operation,
- adds up the mutual induction voltages,
- compares a sum of the mutual induction voltages to a given end value,
- detects an end position of the at least one actuator in response to determining that a sum of the mutual induction voltages reaches a given value, and
- halts movement of the at least one actuator upon detecting the end position in response to determining that the sum of the mutual induction voltages reaches the given value.
8 more elements
Dependencies are inferred from the claim text.