Electric machine
AssigneeRobert Bosch GmbH
InventorDiyap Bueyuekasik
Life of this patent
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Abstract
The invention relates to an electric machine comprising a permanent magnet arrangement and an electromagnetic arrangement. The electromagnetic arrangement comprises a first number of excitation coils, each excitation coils being wound around a pole core. The permanent magnet arrangement comprises a second number of magnet segments formed of a permanently magnetic material. An air gap is arranged between the electromagnet arrangement and the permanent magnet arrangement. The magnet segments have a permanent magnetisation in a first magnet segment volume. At least one magnet segment comprises a demagnetised region in a second magnet segment volume.
Claims14
An electric machine (1), having a permanent-magnet arrangement (2) and an electromagnet arrangement (3), wherein the electromagnet arrangement (3) has a first number of field coils (4), wherein the field coils (4) are each wound around a pole core (5) and wherein the permanent-magnet arrangement (2) has a second number of magnet segments (8) formed from a permanent-magnetic material (7), wherein an air gap (9) is arranged between the electromagnet arrangement (3) and the permanent-magnet arrangement (2), wherein the magnet segments (8) have a permanent magnetization (11) in a first magnet segment volume (10), wherein at least one magnet segment (8) has a demagnetized region (12) in a second magnet segment volume (13).
A method for producing an electric machine (1) comprising the following steps:
- providing an electromagnet arrangement (3) having a first number of field coils (4), wherein the field coils (4) are each wound around a pole core (5);
- providing a permanent-magnet arrangement (2), wherein the permanent-magnet arrangement (2) has a second number of magnet segments (8) formed from a permanent-magnetic material (7), wherein the magnet segments (8) have a permanent magnetization (11) in a first magnet segment volume (10), wherein at least one magnet segment (8) has a demagnetized region (12) in a second magnet segment volume (13);
- arranging the electromagnet arrangement (3) and the permanent-magnet arrangement (2) with an air gap (9) between the electromagnet arrangement (3) and the permanent-magnet arrangement (2).
Dependencies are inferred from the claim text.