Patent US3624504A successfully refreshed from Google Patents.
US3624504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for measuring the direct current supplied by a rectifier arrangement fed by an alternator
Assignee: Jeumont Schneider SA
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Filing: 1968-12-23
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Granted: 1971-11-30
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Expires: 1988-12-23
Abstract
Abstract The disclosure relates to a method of measuring the direct current supplied by a rectifier arrangement fed by an alternator including the steps of detecting the harmonic fluxes created by the armature reaction field, and measuring the detected output, which output is directly proportional to the direct current supplied by the rectifier arrangement of the alternator. The apparatus for detecting the harmonic fluxes is a reference coil which is positioned adjacent to the armature of the alternator.
Inventors
- 👤 Jacques Joly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:00
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/34; G01R31/343
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
98 words
A method of measuring the direct current supplied by a rotary rectifier arrangement fixed on the shaft of an alternator having a rotary armature feeding said rotary rectifier arrangement, comprising the steps of detecting, with a coreless coil, the harmonic fluxes created by the armature reaction field of the alternator, which harmonic fluxes rotate with respect to said coil as opposed to the fundamental flux which is stationary with respect thereto, and generating a signal proportional to said harmonic fluxes, and measuring said signal which signal is an indication of the direct current supplied by the rectifier arrangement.
Claim 2
Independent Claim
98 words
A method of measuring the direct current supplied by a rotary rectifier arrangement fixed on the shaft of an alternator having a rotary armature feeding said rotary rectifier arrangement, comprising the steps of detecting, with a coreless coil, the harmonic fluxes created by the armature reaction field of the alternator, which harmonic fluxes rotate with respect to said coil as opposed to the fundamental flux which is stationary with respect thereto, and generating a signal proportional to said harmonic fluxes, and measuring said signal which signal is an indication of the direct current supplied by the rectifier arrangement.
Claim 3
Independent Claim
133 words
An apparatus for measuring the direct current supplied by a rotary rectifier arrangement fixed on the shaft of an alternator having a yoke sustaining a number of stator poles and a rotary armature feeding the rotary rectifier arrangement, including at least one coreless coil secured to said yoke between two consecutive stator poles, said coil being positioned relative to said armature so as to detect the harmonic fluxes created by the armature reaction field of said alternator, which fluxes rotate with respect to the stator and said coil as opposed to the fundamental flux which is stationary relative thereto, said coil generating an output signal proportional to said harmonic fluxes, and means for measuring the output of said coil, said output being directly proportional to the direct current supplied by the rectifier arrangement.
Claim 4
Independent Claim
133 words
An apparatus for measuring the direct current supplied by a rotary rectifier arrangement fixed on the shaft of an alternator having a yoke sustaining a number of stator poles and a rotary armature feeding the rotary rectifier arrangement, including at least one coreless coil secured to said yoke between two consecutive stator poles, said coil being positioned relative to said armature so as to detect the harmonic fluxes created by the armature reaction field of said alternator, which fluxes rotate with respect to the stator and said coil as opposed to the fundamental flux which is stationary relative thereto, said coil generating an output signal proportional to said harmonic fluxes, and means for measuring the output of said coil, said output being directly proportional to the direct current supplied by the rectifier arrangement.
Claim 5
Dependent Claim
34 words
An apparatus as defined in claim 2, wherein said coil is spaced from the armature by a distance which is approximately equal to the width of the airgap between the poles and the armature.
Claim 6
Dependent Claim
24 words
An apparatus as defined in claim 2, wherein a plurality of coils is provided between the poles, said coils being electrically connected in series.
Claim 7
Dependent Claim
23 words
An apparatus as defined in claim 2, wherein a plurality of coils is provided between the poles, said coils being connected in parallel.
Claim 8
Dependent Claim
20 words
An apparatus as defined in claim 2, wherein the means for measuring the output of the coils includes a voltmeter.
Claim 9
Dependent Claim
24 words
An apparatus as defined in claim 2, wherein the means for measuring the output of said coils includes filter means for eliminating unwanted harmonics.
Claim 10
Dependent Claim
25 words
An apparatus as defined in claim 2, wherein the means for measuring the output of said coils includes a circuit tuned to a predetermined harmonic.
Claim 11
Dependent Claim
17 words
A method as defined in claim 1, wherein the harmonics detected are the fifth and seventh harmonics.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |