A motor, comprising: a stator, comprising a stator core provided with windings; a rotor, rotatably mounted with respect to the stator, wherein the rotor comprises a rotor core and a rotor shaft located at a center of the rotor core and connected to the rotor core; a bearing, supporting the rotor shaft, and comprising a bearing inner ring and a bearing outer ring; a bearing bracket, comprising a bearing support portion made of conductive material and configured for fixing and conducting the bearing outer ring; wherein at least one bearing bracket further comprises a stator bracket portion made of conductive material and configured for connection to the stator, the stator bracket portion is located on the radially outer side of the bearing support portion, and a bracket insulation layer is provided between the bearing support portion and the stator bracket portion; characterised by an electrode structure, configured for adjusting an equivalent capacitance between the bearing inner ring and the bearing outer ring; wherein the electrode structure is electrically connected with the bearing bracket and an adjustment capacitance is formed between the electrode structure and the rotor shaft or the electrode structure is electrically connected with the rotor shaft, and an adjustment capacitance is formed between the electrode structure and the bearing bracket; wherein two bearings are provided, and the two bearings are arranged on both sides of the rotor core at intervals along an axial direction of the rotor core, and each of the bearings is connected to one bearing bracket, and wherein the bearing support portions of the two bearing brackets are electrically connected by a conductive member and the conductive member is insulated from the stator bracket portion. a stator, comprising a stator core provided with windings; a rotor, rotatably mounted with respect to the stator, wherein the rotor comprises a rotor core and a rotor shaft located at a center of the rotor core and connected to the rotor core; a bearing, supporting the rotor shaft, and comprising a bearing inner ring and a bearing outer ring; a bearing bracket, comprising a bearing support portion made of conductive material and configured for fixing and conducting the bearing outer ring; wherein at least one bearing bracket further comprises a stator bracket portion made of conductive material and configured for connection to the stator, the stator bracket portion is located on the radially outer side of the bearing support portion, and a bracket insulation layer is provided between the bearing support portion and the stator bracket portion; characterised by an electrode structure, configured for adjusting an equivalent capacitance between the bearing inner ring and the bearing outer ring; wherein the electrode structure is electrically connected with the bearing bracket and an adjustment capacitance is formed between the electrode structure and the rotor shaft or the electrode structure is electrically connected with the rotor shaft, and an adjustment capacitance is formed between the electrode structure and the bearing bracket; wherein two bearings are provided, and the two bearings are arranged on both sides of the rotor core at intervals along an axial direction of the rotor core, and each of the bearings is connected to one bearing bracket, and wherein the bearing support portions of the two bearing brackets are electrically connected by a conductive member and the conductive member is insulated from the stator bracket portion.