Provided are embodiments for a method for variable differential transformer demodulation using a hybrid algorithm. The method can obtain a first feedback signal over a first half of a first cycle and a second feedback signal over a first half of a second cycle, and obtain a first calibration signal and a second calibration signal during a second half cycle of the first cycle. The method can also obtain an excitation signal over a second half of the second cycle, and determine a sensor position of the variable differential transformer based on the first feedback signal, the second feedback signal, and the excitation signal. Also provided are embodiments for a system for variable differential transformer demodulation using a hybrid algorithm.

Provided are embodiments for a method for variable differential transformer demodulation using a hybrid algorithm. The method can obtain a first feedback signal over a first half of a first cycle and a second feedback signal over a first half of a second cycle, and obtain a first calibration signal and a second calibration signal during a second half cycle of the first cycle. The method can also obtain an excitation signal over a second half of the second cycle, and determine a sensor position of the variable differential transformer based on the first feedback signal, the second feedback signal, and the excitation signal. Also provided are embodiments for a system for variable differential transformer demodulation using a hybrid algorithm.

An adjustable inductor including a toroidal core defining a plurality of gaps, a compressible gap material positioned in the gaps, at least one winding wound on the core, a force-applying structure, and a film substantially covering the adjustable inductor. The force-applying structure is operable to apply a force to the core to adjust the gaps and thereby an inductance of the adjustable inductor. The film is configured to prevent movement of force-applying structure when above a predetermined temperature threshold, and allow movement of the force-applying structure when below the predetermined threshold.

A variable inductive displacement sensor includes a primary excitation coil, a first secondary coil. and a second secondary coil. The primary excitation coil is configured to generate a variable magnetic field, and the first and second secondary coils are configured to each generate a signal induced by the variable magnetic field. The primary coil and the first and second secondary coils each have one end which is intended to be connected to a common ground.

A representative phase-shift based method for using a transformer system to detect movement of an object, and associated systems and methods are disclosed. A representative transformer system detects movement of an object and includes an excitation coil configured to receive an excitation coil input signal that results from an input sinusoidal signal. The transformer further includes first and second sensing coils, and a core configured to be operatively coupled to the object. The core moves relative to the first and second sensing coils when the object moves. First and second impedance loads are connected to the first and second sensing coils, respectively. The two impedance loads have different phase-shifting characteristics. A phase-shift sensing circuit determines a phase-shift between the excitation coil input signal and the input sinusoidal signal that is correlated with a position of the core relative to the first and second sensing coils.

An inductor core including a two separate inductor core components which, when assembled with each other, together form the inductor core and define a common axis; wherein the inductor core components form at least one magnetic flux barrier, the magnetic flux barrier having a width in the circumferential direction relative to the common axis; wherein the width is adjustable by rotating the inductor core components relative to each other around the common axis.

An inductor core including a two separate inductor core components which, when assembled with each other, together form the inductor core and define a common axis; wherein the inductor core components form at least one magnetic flux barrier, the magnetic flux barrier having a width in the circumferential direction relative to the common axis; wherein the width is adjustable by rotating the inductor core components relative to each other around the common axis.

A linear variable displacement transformer (LVDT) position sensor. The position sensor comprises a bobbin, a primary coil of wire wound on the bobbin, a first secondary coil wound in stepped layers on the bobbin, and a second secondary coil wound in stepped layers on the bobbin. The first secondary coil comprises a plurality of booster windings at an end of the first secondary coil. The second secondary coil comprises a plurality of booster windings at an end of the second secondary coil opposite the end of the first secondary coil booster windings. The stepped windings of the second secondary coil are complementary to the stepped windings of the first secondary coil.

A linear variable displacement transformer (LVDT) position sensor. The position sensor comprises a bobbin, a primary coil of wire wound on the bobbin, a first secondary coil wound in stepped layers on the bobbin, and a second secondary coil wound in stepped layers on the bobbin. The first secondary coil comprises a plurality of booster windings at an end of the first secondary coil. The second secondary coil comprises a plurality of booster windings at an end of the second secondary coil opposite the end of the first secondary coil booster windings. The stepped windings of the second secondary coil are complementary to the stepped windings of the first secondary coil.

A reactor 1 according to the present invention includes a coil 2 and a magnetic core 3 where the coil 2 is disposed. In the reactor 1, a core part 4A (4B) including a stacked columnar body having a plurality of core pieces 31m and a plurality of gap members 31g stacked and coating resin 5A (5B) in which a peripheral surface coating portion 51oA (51oB) for coating an outer peripheral surface of the stacked columnar body to integrally hold the core piece 31m and the gap member 31g and an end surface coating portion 51eA for coating one end surface of the stacked columnar body are molded integrally is used for a part of the magnetic core 3, that is, an inner core 31. A manufacturing error of the core piece 31m or the gap member 31g is absorbed by the end surface coating portion 51eA. Consequently, the core part 4A (4B) can be molded with high accuracy and an outer core 32 can be assembled properly. Thus, the reactor 1 has high assembling workability.