Sensorless measurement of positioning travel, especially on an electromotively operated parking brake
AssigneeLucas Automotive GmbH
InventorsChristoph Linden, Michael Keller
Life of this patent
Estimating the term…
Abstract
The invention relates to a method for establishing the position of an actuating unit which is operated by an electric motor, in which a motor speed is determined from a motor model, the speed is integrated over a period of time and the position of the actuating unit is determined by multiplying the result of the integration by a proportionality factor. The motor model takes account of afterrunning of the electric motor at the instant of switch-off. The invention also relates to actuating units, brakes, pumps and transmissions for which the method can be used.
Claims18
Method for establishing a position of an actuating unit which is operated by an electric motor, comprising the steps:
- determining a motor speed from a motor model that takes account of afterrunnning of the electric motor and includes speed proportional damping of the motor;
- integrating the motor speed over a period of time;
- and
- establishing the position of the actuating unit by multiplying the result of the integration by a proportionality factor.
Method for establishing a position of an actuating unit which is operated by an electric motor, comprising the steps:
- determining a motor speed from a motor model that takes account of both a loading torque acting on the electric motor at the instant of switch-off and afterrunnning of the electric motor;
- integrating the motor speed over a period of time;
- and
- establishing the position of the actuating unit by multiplying the result of the integration by a proportionality factor.
Computer device comprising:
- a computer memory device that stores program codes for executing the following steps for establishing the position of an actuating unit operated by an electric motor:
- determining a motor speed from a motor model that takes account of afterrunnning of the electric motor and includes speed proportional damping of the motor;
- and
- determining the travel completed by the actuating unit by integrating the motor speed over a period of time and multiplying it by a proportionality factor.
Actuating device, comprising:
- an electric motor,
- an actuating unit, which is operated by the electric motor,
- a memory unit,
- a processor, and
- a memory unit that comprises program codes for executing the following steps for establishing the position of the actuating unit operated by the electric motor:
- determining a motor speed from a motor model that takes account of afterrunnning of the electric motor and includes speed proportional damping of the motor, and
- determining a travel completed by the actuating unit by integrating the motor speed over a period of time and multiplying it by a proportionality factor.
Actuating device comprising:
- an electric motor,
- an actuating unit, which is operated by the electric motor, said actuating unit being operable to actuate a brake,
- a memory unit,
- a processor, and
- a memory unit that comprises program codes for executing the following steps for establishing the position of the actuating unit operated by the electric motor:
- determining a motor speed from a motor model that takes account of afterrunnning of the electric motor, and
- determining a travel completed by the actuating unit by integrating the motor speed over a period of time and multiplying it by a proportionality factor.
Actuating device comprising:
- an electric motor,
- an actuating unit, which is operated by the electric motor, said actuating unit being operable to actuate a pump device,
- a memory unit,
- a processor, and
- a memory unit that comprises program codes for executing the following steps for establishing the position of the actuating unit operated by the electric motor:
- determining a motor speed from a motor model that takes account of afterrunnning of the electric motor, and
- determining a travel completed by the actuating unit by integrating the motor speed over a period of time and multiplying it by a proportionality factor.
Actuating device comprising:
- an electric motor,
- an actuating unit, which is operated by the electric motor, said actuating unit being operable to actuate a transmission,
- a memory unit,
- a processor, and
- a memory unit that comprises program codes for executing the following steps for establishing the position of the actuating unit operated by the electric motor:
- determining a motor speed from a motor model that takes account of afterrunnning of the electric motor, and
- determining a travel completed by the actuating unit by integrating the motor speed over a period of time and multiplying it by a proportionality factor.
Method for establishing a position of an actuating unit which is operated by an electric motor, comprising the steps:
- determining a motor speed from a motor model that takes account of afterrunnning of the electric motor by delivering an induced voltage as a supply voltage to the motor model at the instant of switch off;
- integrating the motor speed over a period of time;
- and
- establishing the position of the actuating unit by multiplying the result of the integration by a proportionality factor.
Actuating device, comprising:
- an electric motor,
- an actuating unit, which is operated by the electric motor,
- a memory unit,
- a processor, and
- a memory unit that comprises program codes for executing the following steps for establishing the position of the actuating unit operated by the electric motor:
- determining a motor speed from a motor model that takes account of afterrunnning of the electric motor by delivering an induced voltage as a supply voltage to the motor model at the instant of switch off, and
- determining a travel completed by the actuating unit by integrating the motor speed over a period of time and multiplying it by a proportionality factor.
Dependencies are inferred from the claim text.