US3659216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear magnetic amplifier
Assignee: General Electric Co
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Filing: 1970-09-28
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Granted: 1972-04-25
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Expires: 1990-09-28
Abstract
Abstract Disclosed is a 2 stage linear magnetic amplifier. The first stage includes a pair of saturable magnetic cores each having a control and a gate winding thereon. Excitation voltage is provided to respective first stage gate windings by an alternating voltage source. A DC control voltage is provided to energize the respective control windings via a synchronous switch to reset them in synchronism with the alternating voltage. The second stage includes a pair of saturable magnetic cores each having a control and a gate winding thereon. Respective second stage control windings are connected in series with respective first stage gate windings so that the output from the first stage gate windings provides reset for the second stage. The respective second stage gate windings are connected to the alternating source and the load.
Inventors
- 👤 Robert P De Puy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:11
CPC Classifications
H; H03; H03F; H03F9/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
219 words
A two-stage magnetic amplifier comprising: a. a transformer coupled to a source of alternating voltage and including plural secondary windings; b. a first stage comprising: i. a first of said secondary windings; and ii. a first saturable magnetic core having first and second windings disposed thereon; c. a second stage comprising: i. a second of said secondary windings; and ii. a second saturable magnetic core having third and fourth windings disposed thereon; d. first means including unidirectional conducting means connecting said first and fourth windings in series with one another and across said first secondary winding, said first means enabling said first and fourth windings to be energized by the voltage appearing on the first secondary winding during one half cycle of the alternating voltage; e. second means including unidirectional conducting means connecting said third winding in series with said second secondary winding and a load, said second means enabling said third winding to be energized by the voltage appearing on the second secondary winding during the alternate half cycle of the alternating voltage; and f. third means applying direct voltage to said second winding, said third means including: i. switch means, operative in synchronism with the alternating voltage, enabling the second winding to be energized by the direct voltage during the alternate half cycle of the alternating voltage.
Claim 2
Dependent Claim
219 words
A two-stage magnetic amplifier comprising: a. a transformer coupled to a source of alternating voltage and including plural secondary windings; b. a first stage comprising: i. a first of said secondary windings; and ii. a first saturable magnetic core having first and second windings disposed thereon; c. a second stage comprising: i. a second of said secondary windings; and ii. a second saturable magnetic core having third and fourth windings disposed thereon; d. first means including unidirectional conducting means connecting said first and fourth windings in series with one another and across said first secondary winding, said first means enabling said first and fourth windings to be energized by the voltage appearing on the first secondary winding during one half cycle of the alternating voltage; e. second means including unidirectional conducting means connecting said third winding in series with said second secondary winding and a load, said second means enabling said third winding to be energized by the voltage appearing on the second secondary winding during the alternate half cycle of the alternating voltage; and f. third means applying direct voltage to said second winding, said third means including: i. switch means, operative in synchronism with the alternating voltage, enabling the second winding to be energized by the direct voltage during the alternate half cycle of the alternating voltage.
Claim 3
Dependent Claim
27 words
The magnetic amplifier as specified in claim 1 wherein said switch means comprises a semiconductor element which is conductive for substantially all of said alternate half cycle.
Claim 4
Dependent Claim
58 words
The magnetic amplifier as specified in claim 1 wherein the ratio of the voltage appearing on the second secondary winding with respect to the voltage appearing on the first secondary winding is approximately the same as the ratio of the number of turns of the third winding with respect to the number of turns of the fourth winding.
Claim 5
Dependent Claim
193 words
The magnetic amplifier as specified in claim 1 wherein said first stage additionally comprises: iii. a third of said secondary windings; and iv. a third saturable magnetic core having fifth and sixth windings thereon; and wherein said second stage additionally comprises: iii. a fourth of said secondary windings; and iv. a fourth saturable magnetic core having seventh and eight windings thereon; and wherein the first means also includes unidirectional conducting means connecting said fifth and eighth windings in series with one another and across said third secondary winding, said first means enabling said fifth and eighth windings to be energized by the voltage appearing on the third secondary winding during said alternate half cycle of the alternating voltage, and wherein the second means also includes unidirection conducting means connecting said seventh winding in series with said fourth secondary winding and the load, said second means enabling said seventh winding to be energized by the voltage appearing on the fourth secondary winding during said one half cycle of the alternating voltage; and wherein said third means also applies said direct voltage to said sixth winding during said one half cycle of the alternating voltage.
References Cited (Backward Citations)
US2965835A
Cited
US3469179A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |