US3842339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inverter for a load having a parallel resonant circuit
Assignee: Siemens AG
•
Filing: 1972-06-05
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Granted: 1974-10-15
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Expires: 1992-06-05
Abstract
Abstract An inverter has a source of direct voltage, controlled rectifiers and a load circuit having a parallel resonant circuit. The parallel resonant circuit has a capacitance, an inductance including the inductance of the load, at least a pair of controlled rectifiers connected in antiparallel for selectively closing and opening the parallel resonant circuit to provide high output frequency and an output at the inductance for providing an output voltage.
Inventors
- 👤 M Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:32
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: 7
Claim 1
Independent Claim
174 words
An inverter comprising an input comprising a cource of direct voltage; a first controllable converter valve; a second controllable converter valve connected in series with the first converter valve; first power storage means comprising a first capacitor; second power storage means comprising a second capacitor, the first and second capacitors being connected in series with each other and the series connection of the first and second converter valves being connected in parallel with the series connection of the first and second capacitors; a load circuit comprising a parallel resonant circuit connected between a common point in the connection between the first and second converter valves and a common point in the connection between the first and second capacitors, the parallel resonant circuit comprising output means for connecting a load thereto, a capacitor, an inductance including the inductance of the load, and at least two alternately controllable valves connected in anti-parallel with each other; and firing means which fire said first and second controllable converter valves at approximately maximum current in said parallel resonant circuit.
Claim 2
Dependent Claim
174 words
An inverter comprising an input comprising a cource of direct voltage; a first controllable converter valve; a second controllable converter valve connected in series with the first converter valve; first power storage means comprising a first capacitor; second power storage means comprising a second capacitor, the first and second capacitors being connected in series with each other and the series connection of the first and second converter valves being connected in parallel with the series connection of the first and second capacitors; a load circuit comprising a parallel resonant circuit connected between a common point in the connection between the first and second converter valves and a common point in the connection between the first and second capacitors, the parallel resonant circuit comprising output means for connecting a load thereto, a capacitor, an inductance including the inductance of the load, and at least two alternately controllable valves connected in anti-parallel with each other; and firing means which fire said first and second controllable converter valves at approximately maximum current in said parallel resonant circuit.
Claim 3
Dependent Claim
84 words
An inverter as claimed in claim 1, further comprising a first inductance connected in a first series circuit arrangement with the first converter valve, the first series circuit arrangement being connected in parallel with the series connection of the first capacitor and the parallel resonant circuit, and a second inductance connected in a second series circuit arrangement with the second converter valve, the second series circuit arrangement being connected in parallel with the series connection of the second capacitor and the parallel resonant circuit.
Claim 4
Dependent Claim
72 words
An inverter as claimed in claim 2, having a first oscillating circuit comprised by said first inductance and the capacitance of said parallel resonant circuit, and having a second oscillating circuit comprised by said second inductance and the capacitance of said parallel resonant circuit, each of said first and second oscillating circuits having an oscillating period which is at most half as long as the oscillating period of said parallel resonant circuit.
Claim 5
Dependent Claim
32 words
An inverter as claimed in claim 1, further comprising recharging means connected between a source of direct voltage and the parallel resonant circuit for recharging the capacitor of the parallel resonant circuit.
Claim 6
Dependent Claim
52 words
An inverter as claimed in claim 4, wherein said recharging means comprises a controlled rectifier connected between the source of direct voltage and the parallel resonant circuit for selectively connecting the capacitor of said parallel resonant circuit to said source of direct voltage independently of the other controlled rectifiers of the inverter.
Claim 7
Dependent Claim
37 words
An inverter as claimed in claim 5, wherein said recharging means further comprises another inductance connected in series with the controlled rectifier of the recharging means between the source of direct voltage and the parallel resonant circuit.
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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) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |