A hybrid-electric propulsion system is provided. In one example aspect, the hybrid-electric propulsion system includes a power converter and a propulsor. The propulsor includes a gas turbine engine having a shaft and one or more bearings supporting the shaft. The propulsor also includes an electric machine electrically coupled with the power converter. The electric machine includes a stator assembly and a rotor assembly. The rotor assembly has a rotor and a rotor connection assembly. The rotor connection assembly operatively couples the rotor with the shaft. The rotor connection assembly has an insulated joint for interrupting common mode electric current from flowing from the rotor of the electric machine to the shaft. A grounding device is included to electrically ground the shaft. The power converter includes an electromagnetic interference filter to reduce common mode voltage reaching the electric machine.

A rotary encoder includes a rotor and a stator. The rotor and the stator are arranged in the rotary encoder such that, when the rotary encoder is arranged on a machine that includes a shaft having a rotation axis, a rotation of the rotor in relation to the stator about the rotation axis of the shaft is allowed, a relative movement between the rotor and the stator along the rotation axis of the shaft is restricted to a predetermined distance, and a movement of the rotor in relation to the shaft along the rotation axis of the shaft is allowed. Additionally, movement of the stator in relation to the machine along the rotation axis of the shaft may be allowed.

A rotary encoder includes a rotor and a stator. The rotor and the stator are arranged in the rotary encoder such that, when the rotary encoder is arranged on a machine that includes a shaft having a rotation axis, a rotation of the rotor in relation to the stator about the rotation axis of the shaft is allowed, a relative movement between the rotor and the stator along the rotation axis of the shaft is restricted to a predetermined distance, and a movement of the rotor in relation to the shaft along the rotation axis of the shaft is allowed. Additionally, movement of the stator in relation to the machine along the rotation axis of the shaft may be allowed.

A vehicle includes an electric machine having a rotor and a stator, a resolver that measures a position of the rotor relative to the stator, and a controller. The controller, based on the position and a resolver offset, injects a first current having only a d-axis component into the electric machine, and responsive to detecting a first motion output of the electric machine being greater than a threshold, adjusts the resolver offset according to a magnitude and direction of the first motion output.

A vehicle includes an electric machine having a rotor and a stator, a resolver that measures a position of the rotor relative to the stator, and a controller. The controller, based on the position and a resolver offset, injects a first current having only a d-axis component into the electric machine, and responsive to detecting a first motion output of the electric machine being greater than a threshold, adjusts the resolver offset according to a magnitude and direction of the first motion output.

A resolver stator is a resolver stator to be applied to a variable reluctance resolver. The resolver stator includes a plurality of magnetic poles and three winding wires (an excitation winding wire, a first detection winding wire, and a second detection winding wire). The plurality of magnetic poles are annularly arranged in an alignment. Each of the three winding wires is wound around each of the plurality of magnetic poles while being circulated along the alignment of the plurality of magnetic poles. One of the clockwise direction and the counterclockwise direction is the first turning direction, and the other of the clockwise direction and the counterclockwise direction is the second turning direction. At least one winding wire of the three winding wires wraps around each of the plurality of magnetic poles in a second turning direction while orbiting along the plurality of magnetic poles in the first turning direction.

A resolver stator is a resolver stator to be applied to a variable reluctance resolver. The resolver stator includes a plurality of magnetic poles and three winding wires (an excitation winding wire, a first detection winding wire, and a second detection winding wire). The plurality of magnetic poles are annularly arranged in an alignment. Each of the three winding wires is wound around each of the plurality of magnetic poles while being circulated along the alignment of the plurality of magnetic poles. One of the clockwise direction and the counterclockwise direction is the first turning direction, and the other of the clockwise direction and the counterclockwise direction is the second turning direction. At least one winding wire of the three winding wires wraps around each of the plurality of magnetic poles in a second turning direction while orbiting along the plurality of magnetic poles in the first turning direction.

A variable reluctance resolver according to an embodiment of the present invention includes a stator unit including a ring-shaped stator unit core and a plurality of teeth protruding inward in an axial direction on the inner circumferential surface of the stator unit core, a rotor unit which is arranged inside the stator unit so as to be spaced therefrom and which rotates around a center shaft, and a terminal unit formed on one side of the stator unit. The rotor unit may include at least one salient pole unit convexly formed outward along the outer circumferential surface thereof, and the at least one salient pole unit is respectively formed in the shape of an oval arc.

A variable reluctance resolver according to an embodiment of the present invention includes a stator unit including a ring-shaped stator unit core and a plurality of teeth protruding inward in an axial direction on the inner circumferential surface of the stator unit core, a rotor unit which is arranged inside the stator unit so as to be spaced therefrom and which rotates around a center shaft, and a terminal unit formed on one side of the stator unit. The rotor unit may include at least one salient pole unit convexly formed outward along the outer circumferential surface thereof, and the at least one salient pole unit is respectively formed in the shape of an oval arc.

Disclosed are an in-wheel working device and an automobile including the in-wheel working device. According to one aspect of the present disclosure, provided is an in-wheel working device including a rotation detection sensor coupled to a wheel bearing. The rotation detection sensor includes: a sensor stator coupled to an outer race of the wheel bearing; and a sensor rotor coupled to a hub of the wheel bearing. The sensor stator includes a printed circuit board (PCB) substrate having a surface on which a coil pattern made of a metal material is formed.