Patent US4009430A successfully refreshed from Google Patents.
US4009430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antiparallel commutated inverter
Assignee: Individual
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Filing: 1975-04-14
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Granted: 1977-02-22
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Expires: 1995-04-14
Abstract
Abstract A control circuit for regulating power to a resonant load from a dc source including switching devices, magnetic means and antiparallel means for increasing the reverse voltage on the switching devices, reducing the dv/dt stresses on the switching devices, reducing the likelihood of a crowbar or shoot through of the switching devices and obtaining the ability of recovering from a shoot through without device failure or circuit interruption.
Inventors
- 👤 Donald F. Partridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:33
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/505; H02M7/515; H02M7/523; H02M7/5233; H02M7/5236
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
179 words
A control system for regulating power input to a resonant electrical load from a dc source having first and second terminals, the combination comprising: a magnetic means connected between said first and second terminals to receive power from said source; a first switching device between the magnetic means and said first terminal and a second switching device between said magnetic means and said second terminal operable to commutate the flow of power from the respective terminal to the magnetic means when the switching device is interrupted; a first anti-parallel means connected across said first switching device and a second anti-parallel means connected across said second switching device; and a series resonant load connected with said magnetic means to receive power through the magnetic means from said dc source whereby by the selective commutation of said switching devices the power input to the load from the source can be regulated while said first and second anti-parallel means serve to provide a path for reverse current from the load around the respective switching device as the associated switching device is commutated.
Claim 2
Dependent Claim
179 words
A control system for regulating power input to a resonant electrical load from a dc source having first and second terminals, the combination comprising: a magnetic means connected between said first and second terminals to receive power from said source; a first switching device between the magnetic means and said first terminal and a second switching device between said magnetic means and said second terminal operable to commutate the flow of power from the respective terminal to the magnetic means when the switching device is interrupted; a first anti-parallel means connected across said first switching device and a second anti-parallel means connected across said second switching device; and a series resonant load connected with said magnetic means to receive power through the magnetic means from said dc source whereby by the selective commutation of said switching devices the power input to the load from the source can be regulated while said first and second anti-parallel means serve to provide a path for reverse current from the load around the respective switching device as the associated switching device is commutated.
Claim 3
Dependent Claim
55 words
A control for regulating power input to a resonant electrical load from a dc source having first and second terminals as recited in claim 1 wherein said first and second anti-parallel means each includes a third switching device which is caused to conduct in coordination with the commutation of said first and second switching devices.
Claim 4
Dependent Claim
35 words
A control for regulating power input to a resonant electrical load from a dc source having first and second terminals as recited in claim 1 wherein said first and second anti-parallel means includes a diode.
Claim 5
Dependent Claim
41 words
A control for regulating power input to a resonant electrical load from a dc source having first and second terminals as recited in claim 1 wherein said first and second anti-parallel means each includes a diode and resistor in series connection.
Claim 6
Dependent Claim
43 words
A control for regulating power input to a resonant electrical load from a dc source having first and second terminals as recited in claim 1 including first and second dv/dt filters connected dynamically in parallel respectively with said first and second switching devices.
Claim 7
Dependent Claim
42 words
A control for regulating power input to a resonant electrical load from a dc source having first and second terminals as defined in claim 2 including first and second dv/dt filters connected in parallel with said first and second switching devices respectively.
Claim 8
Dependent Claim
59 words
A control for regulating power input to a resonant electrical load from a dc source having first and second terminals as defined in claim 1 wherein said magnetic means comprises a center tapped inductor with the circuit means connecting the load to receive power through the magnetic means being connected between the inductor center tap and the dc source.
Claim 9
Dependent Claim
70 words
A control for regulating power input to a resonant electrical load from a dc source having first and second terminals as defined in claim 1 wherein said magnetic means comprises first, second and third inductors and said first and second anti-parallel devices are each connected in series with the first and second inductors respectively, and the third inductor is connected in series with the said first and second switching devices.
Claim 10
Dependent Claim
42 words
A control for regulating power input to a resonant electrical load from a dc source having first and second terminals as defined in claim 8 includes first and second dv/dt filters connected in parallel with said first and second switching devices respectively.
Claim 11
Dependent Claim
135 words
A control for regulating power input to an electrical load from a dc source having first and second terminals, said control comprising, magnetic means connected across the terminals to receive power from the dc source; first and second switching means connected to interrupt the flow of power from the first and second terminals respectively, to the magnetic means; first and second circuit means connected in parallel with the first and second switching means for providing a reverse current flow path around the switching means when that switching means is interrupted, said first and second circuit means including voltage means for interacting with the reverse load current to establish a significant reverse voltage across the associated switching means; and circuit means for transmitting energy from the dc source and through the magnetic means to the load.
Claim 12
Dependent Claim
135 words
A control for regulating power input to an electrical load from a dc source having first and second terminals, said control comprising, magnetic means connected across the terminals to receive power from the dc source; first and second switching means connected to interrupt the flow of power from the first and second terminals respectively, to the magnetic means; first and second circuit means connected in parallel with the first and second switching means for providing a reverse current flow path around the switching means when that switching means is interrupted, said first and second circuit means including voltage means for interacting with the reverse load current to establish a significant reverse voltage across the associated switching means; and circuit means for transmitting energy from the dc source and through the magnetic means to the load.
Claim 13
Dependent Claim
102 words
A circuit for commutating a switching device using anti-parallel type commutation, said circuit comprising: a switching device adapted to interrupt current flow from a dc source; a magnetic means connected in series with said switching device; an anti-parallel means connected in parallel with said switching device and said magnetic means; a series resonant means connected to receive current through the switching device and the magnetic means; commutation control means for causing an interaction between said series resonant means, said magnetic means and said anti-parallel means to establish a significant reverse voltage across the switching device during the commutation of said switching device.
Claim 14
Dependent Claim
102 words
A circuit for commutating a switching device using anti-parallel type commutation, said circuit comprising: a switching device adapted to interrupt current flow from a dc source; a magnetic means connected in series with said switching device; an anti-parallel means connected in parallel with said switching device and said magnetic means; a series resonant means connected to receive current through the switching device and the magnetic means; commutation control means for causing an interaction between said series resonant means, said magnetic means and said anti-parallel means to establish a significant reverse voltage across the switching device during the commutation of said switching device.
Claim 15
Dependent Claim
83 words
A circuit for commutating a switching device using anti-parallel type commutation comprising: a switching device connected to a dc source; a magnetic means; an anti-parallel means connected in parallel with said switching device and said magnetic means; a series resonant means connected to said magnetic means; and commutation control means for causing interaction between said series resonant means, said magnetic means and said anti-parallel means to establish a significant reverse voltage across the said switching device during the commutation of said switching device.
Claim 16
Dependent Claim
83 words
A circuit for commutating a switching device using anti-parallel type commutation comprising: a switching device connected to a dc source; a magnetic means; an anti-parallel means connected in parallel with said switching device and said magnetic means; a series resonant means connected to said magnetic means; and commutation control means for causing interaction between said series resonant means, said magnetic means and said anti-parallel means to establish a significant reverse voltage across the said switching device during the commutation of said switching device.
Claim 17
Dependent Claim
20 words
A circuit as defined in claim 12 in combination with a dv/dt filter connected in parallel with said switching device.
Claim 18
Dependent Claim
16 words
A circuit as defined in claim 13 wherein said anti-parallel means includes a second switching device.
Claim 19
Dependent Claim
14 words
A circuit as defined in claim 12 wherein said anti-parallel means includes a diode.
Claim 20
Dependent Claim
16 words
A control as defined in claim 10 wherein said load is of the series resonant type.
Claim 21
Dependent Claim
57 words
A control as defined in claim 16 wherein said series resonant load provides a reverse current when said first and second switching means interrupts the flow of power from the first and second terminals respectively and said first and second circuit means includes current conducting means operable to conduct said reverse load current around the switching means.
Claim 22
Dependent Claim
15 words
A control as defined in claim 17 wherein said load is an induction heating circuit.
Claim 23
Dependent Claim
45 words
A circuit as defined in claim 11 wherein said series resonant means generates a reverse current when said switching device interrupts current flow from the dc source and said anti-parallel means includes current conducting means for conducting the reverse load current around said switching device.
Claim 24
Dependent Claim
17 words
A circuit as defined in claim 19 wherein said series resonant means is an induction heating load.
Claim 25
Dependent Claim
17 words
A circuit as defined in claim 12 wherein said series resonant means is an induction heating load.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-02-22 | 1980-08-23 | 1981-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-22 | 1984-08-23 | 1985-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-22 | 1988-08-23 | 1989-02-22 | $7700.00 | Window Closed / Lapsed |