Busbar, motor and electric power steering system

The invention provides a busbar, a motor and an electric power steering system, the busbar comprises a holder (10) and a copper bar (20) fixed on the holder (10), the busbar can be fixed on a cover (H1) of a shell (H) of the motor, the holder (10) comprises at least one buckle group (110), the buckle group (110) comprises at least two buckles (111), and the buckle group (110) is used for penetrating through a bayonet (H10) located on the cover (H1) and is clamped with the cover (H1). According to the utility model, the busbar is fixed with the shell in a clamping manner, so that the assembly process of the busbar is simple, foreign matters such as welding slag and the like are not generated in the assembly process, in addition, the busbar can be axially supported by the shell, and the copper bar can be axially inserted with the circuit board and is not easy to displace. 本申请提供一种汇流排、电机和电动助力转向系统，汇流排包括保持架(10)和固定于保持架(10)的铜排(20)，汇流排能够固定于电机的壳体(H)的盖(H1)，保持架(10)包括至少一个卡扣组(110)，卡扣组(110)包括至少两个卡扣(111)，卡扣组(110)用于穿过位于盖(H1)的