Circuit board, motor, and fan motor

Abstract

A motor that drives an impeller of a fan motor includes a rotor, stator, and circuit board. The circuit board is electrically connected to a controller that drives the rotor. When electrical connection between first and second signal lines is established, the rotor is drivable in a first mode. When electrical connection is cut, the rotor is drivable in a second mode. The circuit board includes a board, a protrusion protruding from an end of the board in a first direction perpendicular or substantially perpendicular to a board thickness direction, wiring portions, a first surface on one side in a second direction parallel or substantially parallel to the board thickness direction and a second surface on the other side. The wiring portions include first and second signal lines respectively provided on the first and second surfaces of the board and protrusion, the second signal line being electrically connected to the first signal line at the protrusion.

Dependencies are inferred from the claim text.