US3728610A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant power regulator from ac source
Assignee: Individual
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Filing: 1970-09-21
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Granted: 1973-04-17
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Expires: 1990-09-21
Abstract
Abstract A circuit for supplying a consant power to a load from an AC source that may vary in voltage, including a diode connecting the AC source to the load to directly supply power during part of the positive half cycle, and a silicon controlled rectifier (SCR) that supplies power from a capacitor to the load during another part of each cycle. The capacitor is charged to a higher voltage than the AC source so that when it is connected to the load sometime during the positive half cycle it stops the direct flow of power to the load through the diode and the capacitor then supplies a fixed power. A circuit that senses the AC voltage will fire the SCR later in the positive half cycle when the AC source voltage rises, so that more power can flow to the load directly through the diode prior to connection of the capacitor.
Inventors
- 👤 H Switsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:35
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/12; H02M7/145; H02M7/155; H02M7/1555; H02M7/1557
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
135 words
A circuit for regulating power to a load from a source whose voltage alternates in polarity in cycles comprising: capacitor voltage boost means coupled to said source, for storing power and for supplying power to said load at a voltage magnitude greater than the voltage of said source and at an appreciable voltage during a time when said source is alternating in polarity; controlled gating means for connecting said voltage boost means to the load during part of each cycle of said alternating source which includes a time when said source is alternating in polarity; and second means connecting said source to said load for supplying power from said source to said load during a part of each cycle of said alternating source when said voltage boost means is not supplying power to the load.
Claim 2
Dependent Claim
135 words
A circuit for regulating power to a load from a source whose voltage alternates in polarity in cycles comprising: capacitor voltage boost means coupled to said source, for storing power and for supplying power to said load at a voltage magnitude greater than the voltage of said source and at an appreciable voltage during a time when said source is alternating in polarity; controlled gating means for connecting said voltage boost means to the load during part of each cycle of said alternating source which includes a time when said source is alternating in polarity; and second means connecting said source to said load for supplying power from said source to said load during a part of each cycle of said alternating source when said voltage boost means is not supplying power to the load.
Claim 3
Dependent Claim
98 words
The circuit described in claim 1 wherein: said voltage boost means supplies a voltage substantially equal to the source voltage plus a an additional voltage; and said second means begins to supply power to said load at a predetermined time during each cycle; and including third means responsive to the voltage at said source for firing said controlled gating means at times when said second means is already supplying power, said third means firing said gating means at earlier or later times as said source voltage respectively decreases or increases, whereby to maintain a more constant load power.
Claim 4
Dependent Claim
85 words
The circuit described in claim 1 wherein: said controlled gating means includes controlled rectifier means having a pair of main terminals respectivily connected to said voltage boost means and said load and having a gate, and timing circuit means for providing a firing voltage at said gate at a controlled time in each cycle of said source; and said voltage boost means supplies a voltage which falls to substantially zero at a time in each cycle, to allow said controlled rectifier means to turn off.
Claim 5
Dependent Claim
65 words
The circuit defined in claim 1 wherein: both the said controlled gating means which connects the voltage boost means to the load and the said second means which connects the source to the load are controlled rectifiers, and including a timer circuit for rendering both of said controlled rectifiers nonconductive to cut off the supply of power to the load after a predetermined timed interval.
Claim 6
Dependent Claim
115 words
A circuit for maintaining substantially constant power from a source whose voltage alternates in cycles and which may fluctuate in value comprising: a capacitor for storing a charge; means for connecting said capacitor to said source to cyclically charge said capacitor; first rectifier means connecting said source directly to the load during only a portion of each cycle of said source; controlled rectifier means coupling said capacitor to the load during a portion of each cycle; and means rendering said controlled rectifier means conducting at a point in the cycle of said alternating source dependent on the fluctuating voltage thereof, so that the power supplied to the load is substantially constant regardless of such fluctuation.
Claim 7
Dependent Claim
115 words
A circuit for maintaining substantially constant power from a source whose voltage alternates in cycles and which may fluctuate in value comprising: a capacitor for storing a charge; means for connecting said capacitor to said source to cyclically charge said capacitor; first rectifier means connecting said source directly to the load during only a portion of each cycle of said source; controlled rectifier means coupling said capacitor to the load during a portion of each cycle; and means rendering said controlled rectifier means conducting at a point in the cycle of said alternating source dependent on the fluctuating voltage thereof, so that the power supplied to the load is substantially constant regardless of such fluctuation.
Claim 8
Dependent Claim
38 words
The circuit defined in claim 5 wherein: the outputs of said rectifier means are connected to a common point so that conduction of said controlled rectifier applies a higher voltage to discontinue conductance of said first rectifier means.
Claim 9
Dependent Claim
151 words
A circuit for regulating the power to a load from a source whose voltage across first and second lines thereof alternates in cycles comprising: a capacitor; means for connecting a first side of said capacitor to a first line of said source; a first rectifier connecting a second side of said capacitor to a second line of said source; controlled gating means having a first terminal connected to said second side of said capacitor, a second terminal connected to the load, and a control terminal; control means coupled to said control terminal and responsive to said source for turning on said controlled rectifier means at a controlled point in each cycle of said source; and a second rectifier connecting said source to said load for supplying power to the load at substantially said source voltage during a part of each cycle when said capacitor is not supplying power to the load.
Claim 10
Dependent Claim
151 words
A circuit for regulating the power to a load from a source whose voltage across first and second lines thereof alternates in cycles comprising: a capacitor; means for connecting a first side of said capacitor to a first line of said source; a first rectifier connecting a second side of said capacitor to a second line of said source; controlled gating means having a first terminal connected to said second side of said capacitor, a second terminal connected to the load, and a control terminal; control means coupled to said control terminal and responsive to said source for turning on said controlled rectifier means at a controlled point in each cycle of said source; and a second rectifier connecting said source to said load for supplying power to the load at substantially said source voltage during a part of each cycle when said capacitor is not supplying power to the load.
Claim 11
Dependent Claim
53 words
The circuit described in claim 7 wherein: said control means turns on said controlled rectifer means at a phase of the cycle of said alternating source dependent on the voltage of said source so that the power supplied to the load is substantially constant regardless of fluctuations in the voltage of the source.
Claim 12
Dependent Claim
137 words
A circuit for providing a regulated power for a controlled time from an AC source comprising: a capacitor; means for charging said capacitor from said AC source; first and second controlled rectifier means each having a gate control; means for connecting said first rectifier means to said load to supply current directly from the AC source to the load; means for connecting said second rectifier means between said capacitor and said load to discharge said capacitor through said load; power regulating means coupled to the gate of said second rectifier means for firing said second rectifier means at a controlled phase of each cycle, to provide a regulated power; and timer means coupled to the gate of said first rectifier means and to said power regulating means for turning off both rectifier means at a controlled time.
Claim 13
Dependent Claim
137 words
A circuit for providing a regulated power for a controlled time from an AC source comprising: a capacitor; means for charging said capacitor from said AC source; first and second controlled rectifier means each having a gate control; means for connecting said first rectifier means to said load to supply current directly from the AC source to the load; means for connecting said second rectifier means between said capacitor and said load to discharge said capacitor through said load; power regulating means coupled to the gate of said second rectifier means for firing said second rectifier means at a controlled phase of each cycle, to provide a regulated power; and timer means coupled to the gate of said first rectifier means and to said power regulating means for turning off both rectifier means at a controlled time.
Claim 14
Dependent Claim
163 words
A circuit for regulating power to a load from a source whose voltage alternates in polarity in cycles comprising: voltage boost means coupled to said source, for storing power and for supplying power to said load at a voltage magnitude greater than the voltage of said source and at an appreciable voltage during a time when said source is alternating in polarity; controlled rectifier means for connecting said voltage boost means to the load during part of each cycle of said alternating source which includes a time when said source is alternating in polarity; second controlled rectifier means connecting said source to said load for supplying power from said source to said load during a part of each cycle of said alternating source when said voltage boost means is not supplying power to the load; and including a timer circuit for rendering both of said controlled rectifiers nonconductive to cut off the supply of power to the load after a predetermined timed interval.
Claim 15
Dependent Claim
163 words
A circuit for regulating power to a load from a source whose voltage alternates in polarity in cycles comprising: voltage boost means coupled to said source, for storing power and for supplying power to said load at a voltage magnitude greater than the voltage of said source and at an appreciable voltage during a time when said source is alternating in polarity; controlled rectifier means for connecting said voltage boost means to the load during part of each cycle of said alternating source which includes a time when said source is alternating in polarity; second controlled rectifier means connecting said source to said load for supplying power from said source to said load during a part of each cycle of said alternating source when said voltage boost means is not supplying power to the load; and including a timer circuit for rendering both of said controlled rectifiers nonconductive to cut off the supply of power to the load after a predetermined timed interval.
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) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |