Abstract: A motor unit system is described that includes a housing, a brushless direct current motor comprising a shaft and a winding, the shaft extending from inside the housing to outside of the housing through a hole at the one end of the housing or another end of the housing, the other end of the housing being opposite the one end of the housing, the winding being contained within the housing, a motor controller contained within the housing, and a motor sensor contained within the housing. The motor sensor may include a current sensor, a temperature sensor, or both.

Abstract: A motor unit system with a navigational light is described. The motor unit system includes a housing with a circular cross-section and mounting holes on one end of the housing, and a brushless direct current motor comprising a shaft and a winding. The shaft may extend from inside the housing to outside of the housing through a hole at the one end of the housing or at another opposite end of the housing. The winding may be contained within the housing, and a light source may also be contained within the housing. An opening in the housing is adapted to allow light from the light source to exit the housing.

Abstract: A motor unit system is described. The motor unit system may include a housing with a brushless direct current motor and a motor controller contained within the same housing, where the motor controller comprises a printed circuit board, and an integrated circuit mounted on a component side of the printed circuit board, and a base plate at one end of the housing. The integrated circuit may be interposed between the base plate and the printed circuit board.

Abstract: A motor unit system is described. The motor unit system may include a housing with a circular cross-section and a brushless direct current motor with a shaft and a winding, the shaft extending from inside the housing to outside of the housing. A motor controller may also be contained within the housing, along with a first connector and a second connector. The first connector may include a first pair of contacts electrically coupled to the motor controller at a power supply input. The second connector may be adapted to operate independently from the first connector, and may include a second pair of contacts electrically coupled to the motor controller at a control input.