US3710233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyphase saturable power modulator
Assignee: Sola Basic Industries Inc
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Filing: 1971-12-15
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Granted: 1973-01-09
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Expires: 1991-12-15
Abstract
Abstract A three-phase delta zig-zag connected system having high leakage reactance cores with magnetic air gap shunts and with aiding and bucking secondary windings, the bucking windings being controlled by d.c. saturation. The aiding and bucking windings are divided between different phase cores.
Inventors
- 👤 H Borkovitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:11
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/32; G05F1/325; H; H01; H01F; H01F29/00; H01F29/14; H01F29/143; H01F29/146
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
172 words
In a polyphase power modulator for controlling power delivered from an a.c. source to a load, the combination including a high leakage reactance transformer core for each phase and having at least one magnetic shunt path with an air gap therein, primary winding means on each core, said primary winding means being connected to the respective phases, first secondary aiding winding means in autotransformer relation to said primary on each core, said primary winding means and aiding winding means being on one side of said magnetic shunt path, bucking winding means on each core on the opposite side of said shunt path, said bucking winding means being connected in series with said aiding winding means, a second set of aiding and bucking winding means connected to said first-mentioned aiding and bucking winding means but located on a different core, the load being connectable to said second set of aiding and bucking winding means, and d.c. control winding means on said core for shifting the primary flux from said secondary bucking winding means.
Claim 2
Dependent Claim
172 words
In a polyphase power modulator for controlling power delivered from an a.c. source to a load, the combination including a high leakage reactance transformer core for each phase and having at least one magnetic shunt path with an air gap therein, primary winding means on each core, said primary winding means being connected to the respective phases, first secondary aiding winding means in autotransformer relation to said primary on each core, said primary winding means and aiding winding means being on one side of said magnetic shunt path, bucking winding means on each core on the opposite side of said shunt path, said bucking winding means being connected in series with said aiding winding means, a second set of aiding and bucking winding means connected to said first-mentioned aiding and bucking winding means but located on a different core, the load being connectable to said second set of aiding and bucking winding means, and d.c. control winding means on said core for shifting the primary flux from said secondary bucking winding means.
Claim 3
Dependent Claim
22 words
A polyphase power modulator as claimed in claim 1 which has a three-phase source and wherein the primaries are connected in delta.
Claim 4
Dependent Claim
29 words
A polyphase power modulator as claimed in claim 2 wherein the output is connected to the input neutral and where the output line to neutral voltage also is regulated.
Claim 5
Dependent Claim
19 words
A polyphase power modulator as claimed in claim 2 wherein the d.c. control windings are responsive to the output.
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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |