Method for adding or removing a rotor having at least one permanent magnet of a permanently excited synchronous machine in a motor vehicle, and motor vehicle
A method for adding or removing a rotor having at least one permanent magnet of a permanently excited synchronous machine in a motor vehicle, which also includes a stator having one or more stator windings, wherein the permanently excited synchronous machine and a pulse inverter connected to the one or more stator windings form a motor arrangement, wherein upon adding or removing the rotor the stator windings are energized for generating a stator field acting against the permanent magnetic field generated by the permanent magnet of the rotor by the pulse inverter in a maintenance mode, such that the forces occurring between the stator and the rotor are reduced and/or at least partly canceled.
1 . A method for adding or removing a rotor having at least one permanent magnet of a permanently excited synchronous machine in a motor vehicle, the method comprising:
connecting a pulse inverter of the vehicle to one or more stator windings of a stator of the permanently excited synchronous machine to form a motor arrangement of the vehicle; and
adding or removing the rotor having the at least one permanent magnet into the stator of the permanently excited synchronous machine while energizing the stator winding by the pulse inverter in a maintenance mode for generating a stator field acting against a permanent magnetic field generated by the at least one permanent magnet of the rotor, such that attraction forces occurring between the stator and the rotor are reduced and/or at least partly canceled.
2 . The method according to claim 1 , wherein the stator field is generated in dependence on rotor position information when adding or removing the rotor.
3 . The method according to claim 2 , wherein the rotor position information when removing the rotor is determined by a rotor position sensor of the synchronous machine.
4 . The method according to claim 3 , wherein when adding the rotor, the rotor is positioned such that the rotor position information indicates a given standard position of the rotor.
5 . The method according to claim 2 , wherein a rotor tool used for the adding or removing the rotor holds the rotor fixed in rotation and/or allows a coupling to the rotor only in one position or in the given standard position.
6 . The method according to claim 1 , wherein a power supply of the pulse inverter in the maintenance mode comes via a high-voltage network of the motor vehicle.
7 . The method according to claim 6 , wherein when the permanently excited synchronous machine and/or the motor arrangement is removed, cable extensions are attached to connect the pulse inverter to the stator windings or the high-voltage network to the pulse inverter.
8 . The method according to claim 1 , wherein the maintenance mode is activated through a diagnostic device which is external to the motor vehicle and hooked up to a diagnostic port of the motor vehicle.
9 . The method according to claim 1 , wherein prior to adding or removing the rotor, a protective cylinder is introduced into an air gap between the rotor and the stator or a region intended for the air gap.
10 . The method according to claim 9 , wherein the protective cylinder is made of plastic.
11 . The method according to claim 1 , wherein the stator field is adapted in an axial direction by actuating the pulse inverter in dependence on a present axial position of the rotor.
12 . The method according to claim 11 , wherein the axial position is determined by a measurement device.
13 . The method according to claim 12 , wherein the axial position of the rotor is determined by the measurement device optically and/or by measuring the magnetic field of the rotor at a fixed stator position.