US3889176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reactive regulator
Assignee: Power Products LLC
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Filing: 1973-10-10
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Granted: 1975-06-10
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Expires: 1993-10-10
Abstract
Abstract A reactive voltage regulator of the shunt type which effectively has a linear inductance in series between input and output terminals and has separate capacitive and inductive reactances shunting the output terminal. A bidirectional switch such as a triac is connected in series with the inductive reactance. The current taken by this inductive reactance, in a preferred embodiment, may be approximately twice that taken by the capacitive reactance such that selective phase angle firing of the bidirectional switch establishes this shunt composed of the capacitive and inductive reactance as selectively either capacitive or inductive in effect. By varying the firing angle of the switch, with respect to the voltage across the shunt regulator circuit, the output voltage or current may be regulated. Alternatively, the series linear inductance and the inductive reactance may be incorporated into a single leakage reactance transformer, and the entire reactive regulator has special advantages when operated on three phase.
Inventors
- 👤 Ronald Harold Randall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:40
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/32; G05F1/34; G05F1/38; H; H02; H02M; H02M5/00; H02M5/02; H02M5/04; H02M5/22; H02M5/25; H02M5/253; H02M7/00; H02M7/02; H02M7/04; H02M7/06; H02M7/066
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
151 words
A regulator circuit comprising, in combination, first and second input terminals adapted to be energized from an alternating voltage source, first and second output terminals adapted to be connected to a load, first and second reactive means of opposite reactive sign, first means to connect said first reactive means effectively in circuit with said input and output teRminals, switch means to connect said second reactive means effectively in circuit with said input and output terminals, said second reactive means being in the order of one-half the impedance of said first reactive means, and means to control the percentage of a complete cycle that said switch means is conducting to control the reactive current through said second reactive means to combine with the current through said first reactive means to make the total effective reactive current for each complete cycle either inductive or capacitive to control the output of said regulator circuit.
Claim 2
Dependent Claim
151 words
A regulator circuit comprising, in combination, first and second input terminals adapted to be energized from an alternating voltage source, first and second output terminals adapted to be connected to a load, first and second reactive means of opposite reactive sign, first means to connect said first reactive means effectively in circuit with said input and output teRminals, switch means to connect said second reactive means effectively in circuit with said input and output terminals, said second reactive means being in the order of one-half the impedance of said first reactive means, and means to control the percentage of a complete cycle that said switch means is conducting to control the reactive current through said second reactive means to combine with the current through said first reactive means to make the total effective reactive current for each complete cycle either inductive or capacitive to control the output of said regulator circuit.
Claim 3
Dependent Claim
25 words
A regulator circuit as set forth in claim 1, wherein said switch means connects said second reactive means effectively in parallel with said output terminals.
Claim 4
Dependent Claim
25 words
A regulator circuit as set forth in claim 1, wherein said first means connects said first reactive means effectively in parallel with said output terminals.
Claim 5
Dependent Claim
30 words
A regulator circuit as set forth in claim 1, wherein said switch means conducts current bidirectionally for conduction on both positive and negative half cycles of the alternating voltage input.
Claim 6
Dependent Claim
22 words
A regulator circuit as set forth in claim 1, including an inductive reactance connected in series between said input and output terminals.
Claim 7
Dependent Claim
45 words
A regulator circuit as set forth in claim 1, wherein said control means regulates one of output voltage and current by controlling the phase angle of the output voltage with respect to the alternating voltage input with decreasing power as the phase angle is advanced.
Claim 8
Dependent Claim
22 words
A regulator circuit as set forth in claim 1, including third reactive means connected in series between said input and output terminals.
Claim 9
Dependent Claim
24 words
A regulator circuit as set forth in claim 1, wherein said first reactive means is capacitive and wherein said second reactive means is inductive.
Claim 10
Dependent Claim
22 words
A regulator circuit as set forth in claim 8, including third reactive means connected in series between said input and output terminals.
Claim 11
Dependent Claim
27 words
A regulator circuit as set forth in claim 9, wherein said connection means connects said first and second reactive means effectively in parallel with said output terminals.
Claim 12
Dependent Claim
19 words
A regulator circuit as set forth in claim 10, wherein said third reactive means is a substantially linear inductance.
Claim 13
Dependent Claim
26 words
A regulator circuit as set forth in claim 11, wherein said second and third reactive means are included as a part of a leakage reactance transformer.
Claim 14
Dependent Claim
22 words
A regulator circuit as set forth in claim 11, wherein said second and third reactive means are on physically separate core means.
Claim 15
Dependent Claim
16 words
A regulator circuit as set forth in claim 11, wherein said switch means is bidirectionally conductive.
Claim 16
Dependent Claim
22 words
A regulator circuit as set forth in claim 14, wherein said switch means is connected in series with said second reactive means.
Claim 17
Dependent Claim
24 words
A regulator circuit as set forth in claim 1, including a third input terminal for energization of the input terminals from a three-phase source.
Claim 18
Dependent Claim
23 words
A regulator circuit as set forth in claim 16, including a third output terminal for supplying a regulated output to a three-phase load.
Claim 19
Dependent Claim
26 words
A regulator circuit as set forth in claim 1, including a rectifier connected to said output terminals to supply a regulated output to a Dc load.
Claim 20
Dependent Claim
79 words
A regulator circuit as set forth in claim 18, including an amplifier having an input connected to amplify changes in said Dc output, a firing capacitor, means connecting said firing capacitor to be charged at a variable rate according to the changing output of said amplifier, and a threshold device connected between said firing capacitor and said switch means to cause conduction of said switch means upon the voltage of said firing capacitor reaching the threshold of said device.
Claim 21
Dependent Claim
46 words
A regulator circuit as set forth in claim 7, wherein said third reactive means is a primary winding on a leakage reactance transformer, said second reactive means is a secondary winding on said leakage reactance transfOrmer, and a magnetic shunt between said primary and secondary windings.
Claim 22
Dependent Claim
32 words
A regulator circuit as set forth in claim 1, wherein said control means controls the magnitude of the average net inductive or capacitive reactance to control the output of said regulator circuit.
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) | 1978-06-09 | 1978-12-09 | 1979-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-09 | 1982-12-09 | 1983-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-09 | 1986-12-09 | 1987-06-10 | $7700.00 | Window Closed / Lapsed |