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US3705341A Expired / Lapsed US ⏱️ 0.0 years remaining

Inverter

Assignee: ABB Norden Holding AB
•
Filing: 1971-05-07
•
Granted: 1972-12-05
•
Expires: 1991-05-07
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Abstract

Abstract An inverter is formed of at least one connection group which is connected to and arranged to be fed from a DC source. Such connection group includes two controlled main rectifiers connected in series with each other between the poles of the DC source, with their connection point forming the output terminal for the output voltage. The rectifiers are ignited alternately. There are also two controlled commutating rectifiers forming in series with each other a part of a connection between the two poles of the DC source and alternately ignited to extinguish the main rectifiers. Between the connection point of the main rectifier and a point in said series connection there is a commutating capacitor. An inductive element is connected with the commutating capacitor to form a series oscillating circuit to recharge the capacitor at each commutation. Limiting rectifiers are connected between each pole of the DC source and the terminal of the commutating capacitor which is connected to the alternating output. The limiting rectifiers have such a polarity that they block for the voltage of the DC source. The inductive element is formed of two reactors each having two windings inductively connected to each other, one of the windings connected in series with a commutating rectifier connected to one pole of the DC source and the other winding in series with a limiting rectifier connected to the other pole of the source.

Inventors

  • 👤 Kjell Frank

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 18:59
CPC Classifications
H; H02; H02M; H02M5/00; H02M5/40; H02M5/42; H02M5/44; H02M5/443; H02M5/45; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/505; H02M7/515; H02M7/5152; H02M7/5155

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 250 words
Inverter comprising at least one connection group which is connected to and arranged to be fed from a DC source, each connection group comprising two controlled main rectifiers, in series with each other, connected between the two poles of the DC source, their connection point forming the output terminal for the output voltage of the inverter, and a control device arranged to ignite these rectifiers alternately, two controlled commutating rectifiers which, in series with each other, form part of a series connection connected between the two poles of the DC source, and a control device arranged to ignite the commutating rectifiers alternately to extinguish the main rectifiers, a commutating capacitor connected between the connection point of the Main rectifiers and a point in said series connection situated between the commutating rectifiers, at least one inductive element arranged, together with the commutating capacitor, to form a series oscillating circuit to recharge the capacitor at each commutation, and limiting rectifiers connected between each pole of the DC source and the terminal of the commutating capacitor facing the alternating voltage output, said limiting rectifiers having such polarity that they block for the voltage of the DC source, in which the inductive element comprises two reactors, each having two windings connected inductively to each other, each reactor having one winding connected in series with a commutating rectifier connected to one pole of the direct voltage source and the other winding in series with the limiting rectifier connected to the other pole of the source.
Claim 2
Dependent Claim 250 words
Inverter comprising at least one connection group which is connected to and arranged to be fed from a DC source, each connection group comprising two controlled main rectifiers, in series with each other, connected between the two poles of the DC source, their connection point forming the output terminal for the output voltage of the inverter, and a control device arranged to ignite these rectifiers alternately, two controlled commutating rectifiers which, in series with each other, form part of a series connection connected between the two poles of the DC source, and a control device arranged to ignite the commutating rectifiers alternately to extinguish the main rectifiers, a commutating capacitor connected between the connection point of the Main rectifiers and a point in said series connection situated between the commutating rectifiers, at least one inductive element arranged, together with the commutating capacitor, to form a series oscillating circuit to recharge the capacitor at each commutation, and limiting rectifiers connected between each pole of the DC source and the terminal of the commutating capacitor facing the alternating voltage output, said limiting rectifiers having such polarity that they block for the voltage of the DC source, in which the inductive element comprises two reactors, each having two windings connected inductively to each other, each reactor having one winding connected in series with a commutating rectifier connected to one pole of the direct voltage source and the other winding in series with the limiting rectifier connected to the other pole of the source.
Claim 3
Dependent Claim 13 words
Inverter according to claim 1, in which the limiting rectifiers comprise uncontrolled rectifiers.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-12-05 1976-06-05 1976-12-05 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-12-05 1980-06-05 1980-12-05 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-12-05 1984-06-05 1984-12-05 $7700.00 Window Closed / Lapsed

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