| 摘要 |
A motor is provided to prevent defects of components installed in an inside of a motor case by preventing permeation of moisture into the inside of the motor case. A motor includes a stator, a rotor, a case, and a controller(300). The rotor is pivotally installed with respect to the stator. The case includes an upper case and a lower case(120) in order to surround the stator and the rotor. The case is formed by coupling the upper case and the lower case with each other. The controller is installed at the upper case. The controller senses a rotational speed of the rotor in order to control the rotational speed. The controller includes a PCB(Printed Circuit Board) and a housing for surrounding the PCB. A hall sensor for sensing the rotational speed of the rotor is mounted on the PCB.
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