A brushless motor, comprising: a casing having an insulating property; a stator fixed within the casing, the stator comprising a stator core and a winding wound around the stator core; and a rotor rotatably arranged within the stator, the rotor comprising a rotor core and a shaft passing through the rotor core, wherein two bearings are sleeved on the shaft at positions corresponding to two ends of the rotor core, respectively, and two bearing brackets are installed at two ends of the casing for fixing the two bearings; wherein a first conductive sheet and a second conductive sheet are arranged between at least one of the two bearing brackets and the stator core, and are configured to cooperate to balance a potential of an inner ring and a potential of an outer ring of each of the two bearings; the first conductive sheet and the second conductive sheet are aligned side by side and spaced apart from each other; and the first conductive sheet is in electrical connection with the stator core, and the second conductive sheet is in electrical connection with an adjacent bearing bracket; characterized in that: a supporting board is configured to support the first conductive sheet and the second conductive sheet; the supporting board is fixed at the casing; wherein the supporting board is provided with a first conductive pad and a second conductive pad, the first conductive pad is electrically connected to the first conductive sheet, and the second conductive pad is electrically connected to the second conductive sheet; a first electrical contact and a second electrical contact are installed at the casing, the first electrical contact is configured to connect with the first conductive pad, and the second electrical contact is configured to connect with the second conductive pad; and the first electrical contact is in electrical connection with the stator core; and the second electrical contact is in electrical connection with the adjacent bearing bracket. a casing having an insulating property; a stator fixed within the casing, the stator comprising a stator core and a winding wound around the stator core; and a rotor rotatably arranged within the stator, the rotor comprising a rotor core and a shaft passing through the rotor core, wherein two bearings are sleeved on the shaft at positions corresponding to two ends of the rotor core, respectively, and two bearing brackets are installed at two ends of the casing for fixing the two bearings; wherein a first conductive sheet and a second conductive sheet are arranged between at least one of the two bearing brackets and the stator core, and are configured to cooperate to balance a potential of an inner ring and a potential of an outer ring of each of the two bearings; the first conductive sheet and the second conductive sheet are aligned side by side and spaced apart from each other; and the first conductive sheet is in electrical connection with the stator core, and the second conductive sheet is in electrical connection with an adjacent bearing bracket; a supporting board is configured to support the first conductive sheet and the second conductive sheet; the supporting board is fixed at the casing; wherein the supporting board is provided with a first conductive pad and a second conductive pad, the first conductive pad is electrically connected to the first conductive sheet, and the second conductive pad is electrically connected to the second conductive sheet; a first electrical contact and a second electrical contact are installed at the casing, the first electrical contact is configured to connect with the first conductive pad, and the second electrical contact is configured to connect with the second conductive pad; and the first electrical contact is in electrical connection with the stator core; and the second electrical contact is in electrical connection with the adjacent bearing bracket.