Abstract: The present invention relates to an electric motor and an electric power steering apparatus including the same. According to an embodiment of the present invention, problems such as a malfunction of an electric motor, damage to a component of the electric motor, and lowering of an output of the electric motor can be solved by preventing penetration of foreign substances into the electric motor, so that a steering stability of a vehicle can be improved.

Abstract: The present invention relates to an electric motor and an electric power steering apparatus including the same. According to an embodiment of the present invention, problems such as a malfunction of an electric motor, damage to a component of the electric motor, and lowering of an output of the electric motor can be solved by preventing penetration of foreign substances into the electric motor, so that a steering stability of a vehicle can be improved.

Abstract: The present invention relates to a rack type electric power steering system. The present invention provides a rack type electric power steering system including: a power steering motor comprising a motor housing accommodating a rotor to which a motor shaft is coupled and a stator accommodating the rotor therein, and a front cover having a shaft through-hole for protruding a distal end of the motor shaft to the outside at a portion thereof and coupled to the motor housing such that an inner surface thereof faces the interior of the motor housing; a moisture detection sensor attached to a lower end of an inner surface of the front cover, which is adjacent to the shaft through-hole; and a controller for, if receiving a moisture detection signal of a predetermined value or higher from the moisture detection sensor, stopping driving of the power steering motor.