US4605889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brushless tachometer/synchro
Assignee: Resolvex Corp
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Filing: 1984-08-21
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Granted: 1986-08-12
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Expires: 2004-08-21
Abstract
Abstract A generator providing both tachometer and synchro outputs and comprising a magnetic stator and a corresponding armature structure. The generator stator structure produces a composite magnetic field of both constant (DC) and alternating (AC) flux. The rotor directs the composite flux field through a plurality of sensing coils, each producing a signal from the sensed composite magnetic field and rotor motion, and which coil signal is separated into separate signal components. The components are processed to produce a synchro output which preferrably has standard Hall-effect equivalent signals, as well as providing a tachometer output voltage proportional to the rotor rotational velocity and direction.
Inventors
- 👤 John R. Luneau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:01
CPC Classifications
H; H02; H02K; H02K24/00; G; G01; G01D; G01D5/00; G01D5/12; G01D5/14; G01D5/242; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/46; G08; G08C; G08C19/00; G08C19/38
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
70 words
A generator, comprising: means for providing a magnetic field including a constant field and an alternating field having a frequency of alternation; means for detecting said magnetic field producing a corresponding detected field signal; an armature for selectively coupling said field according to a physical motion of said armature through a range; and output means receiving said detected field signal and producing a tachometer output and a position output therefrom.
Claim 2
Dependent Claim
70 words
A generator, comprising: means for providing a magnetic field including a constant field and an alternating field having a frequency of alternation; means for detecting said magnetic field producing a corresponding detected field signal; an armature for selectively coupling said field according to a physical motion of said armature through a range; and output means receiving said detected field signal and producing a tachometer output and a position output therefrom.
Claim 3
Dependent Claim
55 words
The generator of claim 1, wherein said means for providing a magnetic field includes an oscillator for exciting said means for providing a magnetic field at said frequency of alternation; and said magnetic field signal includes AC and DC signals corresponding to the constant and said alternating field and the movement of said armature therethrough.
Claim 4
Dependent Claim
28 words
The generator of claim 2, wherein said output means includes a phase-sensitive detector receiving said oscillator signal and said detected AC field signals and providing said position output.
Claim 5
Dependent Claim
15 words
The generator of claim 3, wherein said position output is a standard Hall-effect equivalent output.
Claim 6
Dependent Claim
54 words
The generator of claim 3, wherein said phase-sensitive detector further produces a commutation signal according to the position of said armature relative to said means for providing a magnetic field; and said output means further includes switch means receiving said detected DC field signals and said commutation signal and producing said tachometer output signal.
Claim 7
Dependent Claim
37 words
The generator of claim 5, wherein said detected field signal comprises a plurality of signals in phase spacing, wherein through said range, the amplitude of at least one of said three signals corresponds to the armature motion.
Claim 8
Dependent Claim
13 words
The generator of claim 6, wherein said phase spacing are equal phase spacings.
Claim 9
Dependent Claim
20 words
The generator of claim 6, wherein said plurality of detected field signals comprises three signals to provide a three-phase generator.
Claim 10
Dependent Claim
50 words
The generator of claim 6, wherein said detected DC field signals from said three signals from a contiguous signal being directly proportional to the velocity of said armature motion throughout the range of armature motion; and said switch means selectively combines said three signals to form said tachometer output signal.
References Cited (Backward Citations)
US2516114A
Cited
US4228396A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-08-11 | 1990-02-10 | 1990-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-11 | 1994-02-10 | 1994-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-11 | 1998-02-10 | 1998-08-12 | $7700.00 | Window Closed / Lapsed |