US 6,617,712 B1 · Linear position transducer with primary and secondary windings and a movable induction coupling element

Abstract

A linear inductive transducer (T) includes a pair of primary windings (1, 3), fed by means of a power supply unit (C; 11, 13), a pair of secondary windings (2, 4) and a magnetic core (8), movable with respect to the windings. The secondary windings are electrically connected at an intermediate connection point between the primaries, and the transducer provides an electric output signal (Vo) as the sum of two components (Vs, Vs′), both variable as the mutual position between the windings and the core changes, and that depend on variations of the inductance of the primary windings and mutual inductance between the primaries and the secondaries, respectively. According to a specific configuration, it is also possible, starting from a single structure and by varying, in substance, the power supply and the output connections, to attain a transducer (T′) with different functional characteristics (for example, of the differential transformer type, half bridge type, or of another type).

Claims14

Dependent claims

A linear inductive transducer comprising:

electric windings including
a first primary winding, and
a pair of secondary windings,
a magnetic core, for performing linear displacements relative to the electric windings,
a pair of input terminals electrically connected to said first primary winding and adapted for being electrically connected to a power supply unit,
at least one output terminal electrically connected to said electric windings, the transducer being adapted for providing, through the output terminal, an electric signal indicative of the mutual position between said electric windings and said magnetic corc, wherein the electric windings include a second primary winding between said first primary winding and one of said input terminals, said first and second primary windings being electrically connected to each other and to said pair of secondary windings, said electric signal including a first and a second component, indicative of the mutual position between the magnetic core and said primary windings and said secondary windings, respectively.

3 more elements

Dependencies are inferred from the claim text.

Linear position transducer with primary and secondary windings and a movable induction coupling element

Life of this patent

Linear position transducer with primary and secondary windings and a movable induction coupling element

Life of this patent

Abstract

Claims14