US3980943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power supply with complementary switching of power to main and auxiliary loads
Assignee: US Philips Corp
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Filing: 1971-04-27
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Granted: 1976-09-14
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Expires: 1991-04-27
Abstract
Abstract A regulated power supply for drawing approximately constant power from an AC supply feeding a load that varies widely. A switching device in series between the AC supply and the load regulates the load current. A control circuit samples the load and controls the on-off state of the switching device in accordance therewith. A second switching device is connected between the AC supply and an auxiliary load and is switched on and off by the control circuit in synchronism as the first switching device is switched off and on, respectively.
Inventors
- 👤 Philippe Cailleux
- 👤 Claude Mothiron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:18
CPC Classifications
D; D06; D06F; D06F34/00; D06F34/10; H; H02; H02J; H02J3/00; H02J3/12; H02J3/14; D06F2103/00; D06F2103/44; D06F2103/46; D06F2105/00; D06F2105/46; D06F2105/48; D06F34/08; D06F37/00; D06F37/30; D06F37/304; H02J2105/00; H02J2105/40; H02J2105/42; Y; Y02; Y02B; Y02B40/00; Y02B70/00; Y02B70/30; Y02B70/3225; Y04; Y04S; Y04S20/00; Y04S20/20; Y04S20/222; Y04S20/242
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
111 words
A method of obtaining uniform power from an AC electric source that supplies a device whose operational conditions require substantial and frequent variations of applied power comprising the steps of synchronously switching power to and from the device thereby to check and control the operation of the device, sampling a condition of the device and in response to a given condition of the device synchronously switching the power from the AC source in a manner complementary to the synchronous switching of the power to the device so that an auxiliary power is consumed during a part of the time corresponding to the intervals between the supply of power to said device.
Claim 2
Independent Claim
111 words
A method of obtaining uniform power from an AC electric source that supplies a device whose operational conditions require substantial and frequent variations of applied power comprising the steps of synchronously switching power to and from the device thereby to check and control the operation of the device, sampling a condition of the device and in response to a given condition of the device synchronously switching the power from the AC source in a manner complementary to the synchronous switching of the power to the device so that an auxiliary power is consumed during a part of the time corresponding to the intervals between the supply of power to said device.
Claim 3
Independent Claim
84 words
A device for controlling the power drawn from an AC energy supply source by a variable main load exhibiting substantial and frequent variations of the required power during operation comprising, main synchronous switching means connected between the AC supply and the variable main load, control circuit means with an input coupled to the load and an output coupled to said switching means for controlling and regulating the load power, and auxiliary synchronous switching means arranged between the AC energy source and an auxiliary load.
Claim 4
Independent Claim
84 words
A device for controlling the power drawn from an AC energy supply source by a variable main load exhibiting substantial and frequent variations of the required power during operation comprising, main synchronous switching means connected between the AC supply and the variable main load, control circuit means with an input coupled to the load and an output coupled to said switching means for controlling and regulating the load power, and auxiliary synchronous switching means arranged between the AC energy source and an auxiliary load.
Claim 5
Dependent Claim
41 words
A device as claimed in claim 2 further comprising means connecting an output of said control circuit means to said auxiliary synchronous switching means said control circuit means being arranged to cause complementary switching of said main and auxiliary switching means.
Claim 6
Dependent Claim
21 words
A device as claimed in claim 2 characterized in that the auxiliary load is formed in part by the main load.
Claim 7
Dependent Claim
28 words
A device as claimed in claim 2 characterized in that the auxiliary synchronous switching means are chosen from among semiconductor diodes, transistors, thyristors and bidirectional controlled semiconductor devices.
Claim 8
Dependent Claim
23 words
A device as claimed in claim 2 wherein at least one resistive impedance arranged is in series with the auxiliary synchronous switching means.
Claim 9
Dependent Claim
56 words
A device as claimed in claim 2 wherein the auxiliary load is formed in part by the main load and at least one resistive impedance arranged in series with the auxiliary synchronous switching means and the main load so that an auxiliary power is dissipated partly in the resistive impedance and partly in the main load.
Claim 10
Dependent Claim
57 words
A device as claimed in claim 2 further comprising means connecting an output of said control circuit means to said auxiliary switching means, said control circuit means being responsive to a main load parameter to switch said main and auxiliary switching means in synchronism so that when one is on the other is off, and vice versa.
Claim 11
Dependent Claim
47 words
A device as claimed in claim 8 wherein said main switching means comprises a semiconductor bidirectional current device and said auxiliary switching means comprises a pair of transistors connected in reverse parallel arrangement and in series with the auxiliary load across the terminals of the AC supply.
Claim 12
Dependent Claim
70 words
A device as claimed in claim 8 wherein said main switching means comprises a diode bridge circuit with input terminals connected to the terminals of the AC supply and output terminals connected to the main load to supply thereto a unidirectional load current, and said bridge circuit includes at least one arm having a thyristor device with its control electrode connected to the respective output of said control circuit means.
Claim 13
Dependent Claim
35 words
A device as claimed in claim 10 wherein two arms of the bridge each include a diode, a third arm includes a diode in series with a resistor, and a fourth arm includes said thyristor.
Claim 14
Dependent Claim
118 words
A device as claimed in claim 2 wherein said main switching means comprises a diode bridge circuit with input terminals connected to the terminals of the AC supply and output terminals connected to the main load to supply thereto a unidirectional load current, said bridge circuit includes at least one arm having a thyristor device with its control electrode connected to the respective output of said control circuit means, and wherein two arms of the bridge each include a diode, said auxiliary switching means comprises a third diode, and said auxiliary load includes a resistor connected in series with said third diode, said main load and one of said bridge diodes across the terminals of the AC supply.
Claim 15
Dependent Claim
38 words
A device as claimed in claim 12 wherein a fourth arm of the bridge includes a second thyristor device and said third diode is serially connected with said second thyristor device in said fourth arm of the bridge.
Claim 16
Dependent Claim
25 words
A device as claimed in claim 14 wherein said third diode and said resistor are serially connected in the fourth arm of the bridge circuit.
Claim 17
Dependent Claim
125 words
A device as claimed in claim 2 wherein said main switching means comprises a diode bridge circuit with input terminals connected to the terminals of the AC supply and output terminals connected to the main load to supply thereto a undirectional load current, said bridge circuit includes at least one arm having a thyristor device with its control electrode connected to the respective output of said control circuit means, and said auxiliary switching means comprises first and second diodes connected in series opposition across the terminals of the AC supply, and at least one resistor connected across the AC supply in series with at least one of said first and second diodes, said main load and an arm of the bridge that includes a diode.
Claim 18
Dependent Claim
17 words
A device as claimed in claim 12 wherein said auxiliary synchronous switching means comprises a semiconductor diode.
Claim 19
Dependent Claim
64 words
A device as claimed in claim 2 wherein said control circuit means is responsive to a parameter of the main load for operating said main and auxiliary synchronous switching means in a complementary manner such that when one is on the other must be off, and vice versa, thereby to prevent said main and auxiliary synchronous switching means from being simultaneously on and off.
Claim 20
Independent Claim
114 words
A device for regulating the power from an AC supply source to a load means exhibiting substantial power variations comprising, synchronous switching means including first and second switching devices each connected in series with at least a part of said load means across the terminals of the AC supply, control means with an input coupled to the load means and an output coupled to said switching means to switch same on and off as a function of the load means and in a manner such that when said first switching device is switched off the second switching device provides a current path whereby said load means consumes an auxiliary power from the AC supply.
Claim 21
Independent Claim
114 words
A device for regulating the power from an AC supply source to a load means exhibiting substantial power variations comprising, synchronous switching means including first and second switching devices each connected in series with at least a part of said load means across the terminals of the AC supply, control means with an input coupled to the load means and an output coupled to said switching means to switch same on and off as a function of the load means and in a manner such that when said first switching device is switched off the second switching device provides a current path whereby said load means consumes an auxiliary power from the AC supply.
Claim 22
Dependent Claim
55 words
A device as claimed in claim 18 wherein said second switching device comprises a semiconductor diode connected in a first series circuit with said load means across the supply terminals and said first switching device comprises a controlled semiconductor element connected in a second series circuit with said load means across the said supply terminals.
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) | 1979-09-14 | 1980-03-15 | 1980-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-14 | 1984-03-15 | 1984-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-14 | 1988-03-15 | 1988-09-14 | $7700.00 | Window Closed / Lapsed |