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 magnetic field sensor for sensing an absolute position of a target includes a first magnetic field sensing element disposed proximate to a first portion of the target having a first cross-sectional shape configured to generate a first periodic magnetic field signal in response to movement of the first target portion and a second magnetic field sensing element disposed proximate to a second portion of the target having a second cross-sectional shape configured to generate a second periodic magnetic field signal in response to movement of the second target portion, wherein the first periodic magnetic field signal and the second periodic magnetic field signal have a substantially constant phase separation. An output format module responsive to the first periodic magnetic field signal and the second periodic magnetic field signal is configured to generate an output signal of the magnetic field sensor.

A rotor (2) of a rotation angle sensor is configured by forming a band-shaped main body (31) of a magnetic steel sheet into a cylindrical shape so that a thickness direction of the band-shaped main body (31) is set as a radial direction. First undulations (32) are provided at a substantially constant pitch on one arc-shaped edge portion of the band-shaped main body (31), and second undulations (33) are provided at a substantially constant pitch on the other arc-shaped edge portion. A first stator (3) is disposed to face the first undulations (32) of the band-shaped main body (31) of the rotor (2), and a second stator (4) is disposed to face the second undulations (33).

Methods and apparatus for determining a mechanical angle of a target from sine and cosine signals generated by inductive sensing elements by applying harmonic compensation on the sine and cosine signals using possible mechanical angles and analyzing results of the applied harmonic compensation. One of the mechanical angles can be selected based on the results of the applied harmonic compensation. In embodiments, a cost function can be used to select the mechanical angle.

A position sensor system for determining a position of a sensor device relative to a magnetic structure, the system comprising: said magnetic structure comprising a plurality of non-equidistant poles; said sensor device comprising at least three magnetic sensors spaced apart over predefined distances; and the sensor device being adapted for: a) measuring at least three in-plane magnetic field components, and for calculating two in-plane field gradients therefrom; b) measuring at least three out-of-plane magnetic field components, and for calculating two out-of-plane field gradients therefrom; c) calculating a coarse signal based on these gradients; d) calculating a fine signal based on these gradients; e) determining said position based on the coarse signal and the fine signal.

An apparatus for sensing a rotating body includes a detection target arranged on a surface perpendicular to an extension direction of a rotating shaft of the rotating body, a sensor module facing the detection target, and comprising two sensors disposed in a rotation direction of the rotating body, and a rotation information calculator configured to calculate rotation information of the rotating body based on sensed values from the two sensors, wherein the rotation information calculator is further configured to calculate a rotation angle of the rotating body in accordance with a difference value generated from the sensed values.

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.

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 sensor for sensing an absolute position of a target includes a first magnetic field sensing element disposed proximate to a first portion of the target having a first cross-sectional shape configured to generate a first periodic magnetic field signal in response to movement of the first target portion and a second magnetic field sensing element disposed proximate to a second portion of the target having a second cross-sectional shape configured to generate a second periodic magnetic field signal in response to movement of the second target portion, wherein the first periodic magnetic field signal and the second periodic magnetic field signal have a substantially constant phase separation. An output format module responsive to the first periodic magnetic field signal and the second periodic magnetic field signal is configured to generate an output signal of the magnetic field sensor.

Various examples include a target for an inductive angular-position sensor. The target may rotate about a center axis and may include a number of fins respectively including a respective outer-circumferential edge to overlap a respective first arc at least partially defining a first circle centered at the center axis. A respective first central angle of the respective first arc substantially equal to 360° divided by twice a count of the fins. The number of fins may respectively include a respective inner-circumferential edge, positioned closer to the center axis than the respective outer-circumferential edge is to the center axis. The respective inner-circumferential edge may overlap a respective second arc at least partially defining a second circle centered at the center axis. A respective second central angle of the respective second arc substantially equal to 360° divided by the count of the fins. Related devices, systems and methods are also disclosed.