There is provided a resolver rotor in a resolver provided to a rotating electrical machine. The resolver rotor is formed from an annular body. A phase determination hole for setting a relative position to a shaft of a motor is provided at a near outer peripheral portion of the resolver rotor. A virtual circle is set which comes into contact with a section of the phase determination hole at a proximal end to an inside diameter of the resolver rotor, and has a center point coincident with the center of the resolver rotor. A pair of hole portions are arranged at portions extending from the virtual circle to an outside diameter side of the resolver rotor while taking in the virtual circle.

Provided are an in-wheel driving device and a vehicle including the same. According to exemplary embodiments of the present disclosure, the in-wheel driving device includes: a wheel bearing including a hub forming a body; a resolver sensor provided in the inside of the wheel bearing, and including a resolver rotor and a resolver stator; and a wheel sensor partially provided in the inside of the wheel bearing, and detecting a rotation of the resolver rotor.

A magnetic field generator having at least one magnet extending along a longitudinal axis, wherein the magnetic material of the at least one magnet is arranged such that the at least one magnet produces a magnetic field with a magnetic flux density that changes substantially continuously in magnitude in the axial direction substantially along the length of the at least one magnet in the axial direction and a position sensing assembly comprising the magnetic field generator.

An example includes a ring-shaped magnet arrangement for use in determining a rotational angle of a rotatable shaft, the ring-shaped magnet arrangement configured to be connected to or formed as part of the rotatable shaft for co-rotation with the rotatable shaft around a rotational axis, wherein the ring-shaped magnet arrangement includes a first ring portion including a first wedge surface, wherein the first ring portion is magnetized in a first direction; and a second ring portion, that is diametrically opposite the first ring portion, the second ring portion including a second wedge surface, wherein the first wedge surface and the second wedge surface form a wedge in a sensor facing end of the ring-shaped magnet arrangement, and wherein the second ring portion is magnetized in a second direction that is within a threshold angle of the first direction and different from the first direction, wherein the sensor facing end is axially opposite a radial end of the ring-shaped magnet arrangement, wherein the ring-shaped magnet arrangement comprises a single piece of material with an intersecting thickness corresponding to an axial distance between the radial end of the ring-shaped magnet arrangement and a base of the wedge.

A rotation angle sensing device is provided with a magnet that has a component with a magnetization vector in a direction orthogonal to a rotary shaft, a magnetic sensor part that outputs a sensor signal, and a rotation angle sensing part that detects a rotation angle of a rotating body based upon the sensor signal; the magnet has first and second surfaces substantially orthogonal to the rotary shaft, and a concave side surface that is continuous throughout all circumferences in the circumferential direction; the magnetic sensor part is placed within the space surrounded by the concave side surface, and at a position where an amplitude of a magnetic field intensity H.sub.r and an amplitude of a magnetic field intensity H.sub. on the virtual plane are substantially identical to each other, and outputs either the magnetic field intensity H.sub.r or the magnetic field intensity H.sub. as the sensor signal.

An electromechanical actuator includes a ground arm, an output arm rotatable about an axis of rotation relative to the ground arm and a position sensing arrangement to determine an angular position of the output arm relative to the ground arm. The position sensing arrangement includes a position sensor fixed at the ground arm. The position sensor is configured to sense magnetic reluctance. A sensed portion is located at the output arm proximate to the position sensor. The sensed portion includes a geometric variation in an output arm surface configured to vary a magnetic reluctance sensed at the position sensor as a function of angular position of the output arm relative to the ground arm.

A magnetic field generator (50) having at least one magnet (51) extending along a longitudinal axis (101), wherein the magnetic material of the at least one magnet is arranged such that the at least one magnet produces a magnetic field with a magnetic flux density that changes substantially continuously in magnitude in the axial direction substantially along the length of the at least one magnet in the axial direction such as to enable the axial position of the magnetic field generator to be determined by a position sensing assembly comprising the magnetic field generator (50) and at least one magnetic sensor (105).

Embodiments of the present invention are directed to a novel inductive rotational position sensor that includes a sensor module having transmitting and receiving coils formed on a printed circuit board with a signal processor located in a center area enclosed by the transmitting and receiving coils. This arrangement permits a more compact sensor module. The entire sensor module can be positioned inside a cavity, which has a diameter generally the same as the diameter of the rotational element whose position is being sensed. The arrangement also permits a coupler to be formed on the end of the target. The sensor is concentric with the transfer case shaft and an annulus bore of a transfer case. The sensor is non-contacting and has no movable parts.

A resolver includes a resolver rotor fixed to a rotating shaft, and a resolver stator disposed around the resolver rotor. The resolver stator includes an annular stator core having a plurality of salient poles which protrudes radially inward and which is disposed at regular intervals in a circumferential direction. The resolver rotor has an outer peripheral surface defined by an outer radius Rm() which is obtained by blending, with respect to a first function Gp() where an air gap between the resolver rotor and the salient poles is proportional to a sine wave (sin ) related to an angle of the resolver rotor, a second function Gip() where the inverse of the air gap is proportional to the sine wave (sin ), at a predetermined ratio .

A rotational angle sensor includes a stator element, and rotor element. The stator element has a stator transmitting coil and a stator receiving coil. The rotor element is mounted rotatably about a rotation axis relative to the stator element, and has a rotor receiving coil and a rotor transmitting coil electrically connected with each other. The rotor receiving coil is inductively coupled to the stator transmitting coil such that an electromagnetic field produced by the stator transmitting coil induces a current in the rotor receiving coil that flows through the rotor transmitting coil and causes the rotor transmitting coil to produce a further electromagnetic field. The stator receiving coil is inductively coupled to the rotor transmitting coil such that the inductive coupling is configured with reference to a rotational angle between the stator element and the rotor element so that the further electromagnetic field induces at least one angle-dependent alternating voltage in the stator receiving coil. The stator receiving coil has at least two circular-ring-sector-shaped partial windings that divide the stator element into sectors. The rotor transmitting coil has a number of sickle-shaped partial windings equal to the number of circular-ring-sector-shaped partial windings, which extend sequentially around the rotation axis.