Electric boat propulsion device and boat

Abstract

An electric boat propulsion device includes a cylindrical duct including a conductive wall defining an accommodation space, a propeller rotatably supported inside the duct and including a plurality of blades arranged around a propeller axis extending along a central axis of the duct, and a cylindrical rim surrounding the plurality of blades, an electric motor to rotate the propeller relative to the duct and including a stator on the duct and a rotor on the rim, and a circuit board including a contact region that contacts the conductive wall and a non-contact region that does not contact the conductive wall. The circuit board includes a rotation angle sensor to output a signal corresponding to a rotation angle of the rotor, and a circuit pattern in the non-contact region and not in the contact region.

Dependencies are inferred from the claim text.