A flexible circuit board includes a first sub-circuit board and a second sub-circuit board. The first sub-circuit board has a connection portion arranged at a first longitudinal end, and has a connection setting between connection terminals and external terminals of a plurality of phases U, V, W set to a first connection setting that generates a rotating magnetic field in a direction. The second sub-circuit board has a connection portion arranged at a second longitudinal end, and has a connection setting between connection terminals and external terminals of U, V, W set to a second connection setting that generates a rotating magnetic field in a direction. The first sub-circuit board and the second sub-circuit board are bent into a cylindrical shape with the first longitudinal end and the second longitudinal end adjacent to each other to form a stator for a rotating electric machine.

A power module includes a insulation substrate, a first and a second input terminal supported by the insulation substrate, a plurality of arm circuits provided on the insulation substrate, and a plurality of output terminals corresponding to the plurality of arm circuits. The arm circuits each include a part of a wiring pattern formed on the insulation substrate, and a first switching element and a second switching element mutually connected in series via the part of the wiring pattern. The output terminals are each connected to a connection point between the first switching element and the second switching element in a corresponding one of the plurality of arm circuits. The plurality of arm circuits are located so as to overlap with a circle surrounding the first input terminal, as viewed in a thickness direction the insulation substrate.

A power tool that includes a motor and a printed circuit board (PCB). The motor includes a rotor and a stator. The stator includes a plurality of stator terminals. The PCB is electrically connected to the stator. The PCB includes a switch and an embedded busbar. A first end of the embedded busbar is electrically connected to the switch. The embedded busbar extends away from the PCB. A second end of the embedded busbar electrically connects to a stator terminal of the plurality of stator terminals for providing power to the motor using the switch. The embedded bus bar is embedded between two layers of the printed circuit board.

A fan assembly includes a base with multiple layers with at least one layer formed from a relatively lightweight material to reduce the overall weight of the fan assembly. The base may include multiple metal layers and one or more core layers positioned between the metal layers. At least one of the core layers may include a PCB used to route electrical signals between components of the fan assembly and/or between components of an electronic device in which the fan assembly is positioned. Alternatively, at least one of the core layers may include a lightweight material (e.g., plastic) with a channel used to receive a flexible circuit. The base, having layers of different materials, may be lighter in weight as compared to a base consisting of a metal layer (or metal layers), while also substantially retaining flexural stiffness to counter against applied forces to the base.

Examples described herein provide a vehicle that includes a drive unit. The drive unit includes a printed circuit board (PCB) having a coil assembly. The drive unit further includes a rotor assembly connected to a shaft, the shaft having a target. The drive unit further includes circuitry electrically coupled to the coil assembly, the circuitry transmitting an electromagnetic field from the coil assembly to the target on the shaft, receiving a reflected electromagnetic field at the coil assembly from the target on the shaft, and determining a position of the shaft based at least in part on the reflected electromagnetic field.

A single circuit board assembly for forming a vehicle-motor interface includes a first side of a board with logic modules located thereon. The single circuit board assembly also includes a second side of the board with power modules located thereon. The board includes a first plurality of layers and a second plurality of layers, and a dielectric layer disposed between adjacent layers of the first plurality of layers and/or the second plurality of layers, the dielectric layer comprising polytronics material.

An electric motor includes a rotor assembly and a stator assembly. The stator assembly includes a plurality of teeth, a plurality of coils supported about the plurality of teeth, and a conductive terminal electrically connected to at least one coil of the plurality of coils. The conductive terminal includes a lead portion. The electric motor also includes a printed circuit board coupled to the stator assembly and electrically connected to the lead portion. The electric motor further includes a solder cup supported on the lead portion between the printed circuit board and the stator assembly. The solder cup includes a wide end facing toward the printed circuit board, and a narrow end opposite the wide end.