| 摘要 |
Disclosed is a brushless direct current motor comprising a stator, which has a plurality of armature coils, and a permanently excited rotor rotatable relative to the stator about an axis of rotation, which rotor has at least two opposite permanent magnet poles which generate an exciter field that can be described by an exciter field vector. A control device serves to control the armature coils in order to generate, on the stator, an armature field which runs around the axis of rotation and which can be described by an armature field vector, wherein the control device is configured to control the armature coils during operation of the direct current motor in such a way that an angle is set between the armature field vector and the exciter field vector. The control device (2) has a storage unit (20) that stores a characteristic map (K), wherein angle parameters (O) are contained in the characteristic map (K) and the storage device (2) is configured, on the basis of the characteristic map (K), to regulate the angle (α) between the armature field vector (A) and the exciter field vector (E) in accordance with the rotational speed (n) and the torque (M) of the rotor (11) during operation. In this way, a brushless direct current motor is provided which enables the operating behaviour of the motor during operation to be optimised with regard to various criteria, in particular with regard to efficiency, noise behaviour and electromagnetic emissions, but also enables said characteristics to be variably adapted by a user. |
