Method for positioning a rotor shaft of an electric motor, computer program, computer program product, system, and vehicle

A method for positioning a rotor shaft of an electric motor, for driving a vehicle, comprising:

• determining an initial position of the rotor shaft from a plurality of definable rotational angle positions of the rotor shaft in which the rotor shaft can be locked or unlocked without restriction by a form-fitting element of a locking actuator;
• wherein to determine the initial position, the rotor shaft is divided into individual circular segment sections over a circumference of the rotor shaft such that one form-fitting element section is paired with each of the circular segment sections, the form-fitting element section configured to be joined to a complementarily shaped form-fitting element section of the locking actuator;
• positioning the rotor shaft in one of the rotational angle positions, an absolute rotational angle position of the rotor shaft being detected by a rotor (shaft) position sensor, and
• locking or unlocking the rotor shaft in the rotational angle position in that the form-fitting element is moved into or out of the rotor shaft in a stroke movement.

A computer program stored on a nontransient computer readable media when the program code is executed on a computer configured to carry out a method for positioning a rotor shaft of an electric motor when the program code is executed on a computer, the method comprising:

• determining an initial position of a rotor shaft from a plurality of definable rotational angle positions of the rotor shaft in which the rotor shaft can be locked or unlocked without restriction by a form-fitting element of the locking actuator;
• wherein to determine the initial position, the rotor shaft is divided into individual circular segment sections over a circumference of the rotor shaft such that one form-fitting element section is paired with each of the circular segment sections, the form-fitting element section configured to be joined to a complementarily shaped form-fitting element section of the locking actuator;
• positioning the rotor shaft in one of the rotational angle positions, an absolute rotational angle position of the rotor shaft being detected by a rotor (shaft) position sensor, and
• locking or unlocking the rotor shaft in the rotational angle position in that the form-fitting element is moved into or out of the rotor shaft in a stroke movement.

A computer program product, comprising program code stored on a nontransient computer-readable data carrier in order to carry out a method for positioning a rotor shaft of an electric motor when the program code is executed on a computer, the method comprising:

• determining an initial position of the rotor shaft from a plurality of definable rotational angle positions of the rotor shaft in which the rotor shaft can be locked or unlocked without restriction by a form-fitting element of a locking actuator;
• wherein to determine the initial position, the rotor shaft is divided into individual circular segment sections over a circumference of the rotor shaft such that one form-fitting element section is paired with each of the circular segment sections, the form-fitting element section configured to be joined to a complementarily shaped form-fitting element section of the locking actuator;
• positioning the rotor shaft in one of the rotational angle positions, an absolute rotational angle position of the rotor shaft being detected by a rotor (shaft) position sensor, and
• locking or unlocking the rotor shaft in the rotational angle position in that the form-fitting element is moved into or out of the rotor shaft in a stroke movement.

A system with a locking actuator and a control unit (SEInv, SESA) for actuating the locking actuator, wherein the control unit (SEInv, SESA) comprises a computer program product configured to:

• determine an initial position of a rotor shaft from a plurality of definable rotational angle positions of the rotor shaft in which the rotor shaft can be locked or unlocked without restriction by a form-fitting element of the locking actuator;
• wherein to determine the initial position, the rotor shaft is divided into individual circular segment sections over a circumference of the rotor shaft such that one form-fitting element section is paired with each of the circular segment sections, the form-fitting element section configured to be joined to a complementarily shaped form-fitting element section of the locking actuator;
• position the rotor shaft in one of the rotational angle positions, an absolute rotational angle position of the rotor shaft being detected by a rotor (shaft) position sensor, and
• lock or unlock the rotor shaft in the rotational angle position in that the form-fitting element is moved into or out of the rotor shaft in a stroke movement.