A vehicle AC power generator includes a protection cover disposed at the rear side of a rear bracket included in a housing of the vehicle AC power generator, an attachment bolt that penetrates a through-hole formed in a bottom portion of a protection cover and is fixed to a portion at one axle-direction side of the housing, an output terminal bolt that extends from a rectifier, which rectifies AC electric power, toward the outside of one axle-direction side of the protection cover, and an insert coated conductor that is supported by the output terminal bolt and the attachment bolt and is provided at the rear surface of the protection cover.

Electric compressor 1 has electric motor 10 housed in casing 40, the motor including stator 2 having yoke portion 2a and plural tooth portions 2b, and rotor 3 disposed radially inside stator 2. Protrusion 41f protrudes at plural circumferential positions of inner periphery 41a1 of casing 40, which has protruding end surface 41f1 contacting an outer periphery of yoke portion 2a with width larger than tooth portion 2b. Contact tooth back portion 2a11 contacts protruding end surface 41f1, out of plural tooth back portions 2a1 each disposed behind tooth portion 2b as part of the outer periphery of yoke portion 2a, is formed in a region except both edge portions 41h of protruding end surface 41f1 in a circumferential direction within a circumferential angle range θ in which the protruding end surface 41f1 is located.

A high voltage electric machine and power distribution system including one or more of such electric machines are provided. In one aspect, a high voltage electric machine includes a stator, a rotor, and a housing encasing at least a portion of the stator and rotor. The stator is modularized into cascaded voltage stator modules. The stator modules are galvanically isolated from one another by intermodular separators. At least one intermodular separator is positioned between each adjacent pair of stator modules. The stator modules are also galvanically isolated from the housing by a housing separator. The housing separator is positioned between the stator modules and the housing. Each stator module has an associated set of windings that are wound only within their associated stator module.

A high voltage electric machine and power distribution system including one or more of such electric machines are provided. In one aspect, a high voltage electric machine includes a stator, a rotor, and a housing encasing at least a portion of the stator and rotor. The stator is modularized into cascaded voltage stator modules. The stator modules are galvanically isolated from one another by intermodular separators. At least one intermodular separator is positioned between each adjacent pair of stator modules. The stator modules are also galvanically isolated from the housing by a housing separator. The housing separator is positioned between the stator modules and the housing. Each stator module has an associated set of windings that are wound only within their associated stator module.

A power tool is provided including a brushless direct-current (BLDC) electric motor having a stator and a rotor. The power tool includes power switches including high-side switches and low-side switches disposed on a direct-current (DC) bus line between a power supply and the electric motor, and a controller configured to electronically brake the motor by simultaneously closing the high-side switches or the low-side switches to electrically short the stator windings. In an embodiment, the controller is configured to monitor a voltage of the DC bus line, and if the voltage of the DC bus line is lower than a voltage threshold, execute electronic braking by toggling between closing the high-side switches and closing the low-side switches over braking cycles, and if the voltage of the DC bus line is greater than the voltage threshold, execute braking by closing only the high-side switches or the low-side switches over the braking cycles.

Provided is a motor device that makes the influence of noise more equal between two signal processing circuits. A rotation angle sensor has a bias magnet, a magnetic sensor unit, a first signal processing circuit, and a second signal processing circuit. The first signal processing circuit is placed symmetrically with the second signal processing circuit in a longitudinal direction of a substrate with respect to the magnetic sensor unit located on a line extended from a central axis of a rotary shaft. An inverter is also placed symmetrically with an inverter in the longitudinal direction of the substrate with respect to the magnetic sensor unit.

Provided is a motor device that makes the influence of noise more equal between two signal processing circuits. A rotation angle sensor has a bias magnet, a magnetic sensor unit, a first signal processing circuit, and a second signal processing circuit. The first signal processing circuit is placed symmetrically with the second signal processing circuit in a longitudinal direction of a substrate with respect to the magnetic sensor unit located on a line extended from a central axis of a rotary shaft. An inverter is also placed symmetrically with an inverter in the longitudinal direction of the substrate with respect to the magnetic sensor unit.

An electric motor may comprise a rotor and a stator comprising rotor and stator teeth, respectively. A non-uniform angular spacing or grouping of rotor teeth may facilitate desired rotational speeds of the rotor.

A mechanical assembly for a vehicle (10), in particular a motor vehicle, comprises a rotating element (18), a support Got (20) for the rotating element (18), and a cover (22) attached on the support (20) for the rotating element (18). The cover (22) has at least one edge (50) attached on the support (20) for the rotating element (18) and a bottom (52) extending substantially in a plane. The N bottom (52) is at least partially covered by elastomer material (58).

A mechanical assembly for a vehicle (10), in particular a motor vehicle, comprises a rotating element (18), a support Got (20) for the rotating element (18), and a cover (22) attached on the support (20) for the rotating element (18). The cover (22) has at least one edge (50) attached on the support (20) for the rotating element (18) and a bottom (52) extending substantially in a plane. The N bottom (52) is at least partially covered by elastomer material (58).