Electric power steering device

The invention discloses an electric power steering device, which is applied in the field of automobile manufacture and comprises a shaft assembly, a sensor assembly, a shell assembly, a controller, an execution mechanism and a direct driving motor. The sensor assembly acquires an electric power-assistant steering signal from the shaft assembly, the signal is sent to the controller through a connection wire harness, the controller carries out logical operation and analog operation for the signal and then sends a control signal to the direct driving motor, and the direct driving motor drives the execution mechanism to realize power steering, active return and damping control of the electric power steering device. The electric power-assistant steering device adopts the direct driving motor to realize direct driving non-contact control, and solves various technical problems of complex structure, easy abrasion, power limit, inadaptability for controlling a steering gear with large axle weight, and the like in the