| 摘要 |
<p>According to an embodiment of the present invention, an electric pump comprises: a motor module having a rotational shaft and having a rotor surrounding the rotational shaft and having a stator spaced from the rotor and having a housing receiving the stator; an internal rotor coupled with the rotational shaft and rotating using a rotational force of the rotational shaft; a pump module having an external rotor surrounding the internal rotor; and a groove wherein at least one among the internal rotor and the external rotor has a curvature.</p> |
