Linear resolver

Details Linear resolver Linear resolver

1985-07-26

1987-10-13

Caldwell, Sr., John W.

Communications: electrical

Continuously variable indicating

With particular transmitter

34087031, 318661, 310158, 336120, 336123, G08C 1906

Patent

active

047001895

ABSTRACT:
A linear synchro/resolver comprised of an opposed pair of stator assemblies, each of which has a plurality of corresponding, opposed, toothed pole piece pairs, a toothed slider movably mounted between the opposed sets of pole piece pairs, and wherein the pole piece pairs on each stator assembly are spaced apart along the assembly's length by a non-integral multiple of the pitch of the stator teeth. Separate coils are wound on the stator pole pieces, with the coils of adjacent and opposed pairs of coils being connected together in phases. The inductance of the coils is thus a function of the alignment of the slide teeth with the stator pole piece teeth. A source of alternating current is connected to the phases of coils, the current magnitude flowing through each phase of the coils is detected, and the current magnitude differences between the phases are amplified. The phases of each of these amplified current differences are then compared with the phase of the source signal to produce an output signal which is representative of the position of the slider relative to the pole pieces.

REFERENCES:
patent: 3810136 (1974-05-01), Lang et al.
patent: 4455555 (1984-06-01), Symonds et al.
patent: 4551708 (1985-11-01), Welburn
patent: 4618808 (1986-10-01), Ish-Shalom et al.

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