Patent US4594650A successfully refreshed from Google Patents.
US4594650A
Expired / Lapsed
US
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Inverter device
Assignee: Mitsubishi Electric Corp
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Filing: 1984-04-11
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Granted: 1986-06-10
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Expires: 2004-04-11
Abstract
Abstract An inverter device using semiconductor current control elements is disclosed in which a parallel circuit of a current limiting circuit composed of a reactor and a voltage spike absorbing circuit composed of a series circuit of a constant voltage element and a diode is connected in series with each of the semiconductor current control elements to prevent excess current flow through the latter.
Inventors
- 👤 Yoshihide Kinbara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:23
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/32; H02M1/34; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/53; H02M7/537; H02M7/5387; H03; H03K; H03K17/00; H03K17/08; H03K17/081; H03K17/0814; H03K17/08142; H02M1/348
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
130 words
An inverter device comprising: a DC power source, a pair of series-connected current control elements, said series-connected current control elements being connected in series with said DC power source so that a load connected to a junction between said current control elements is supplied with an output voltage by switching said current control elements alternatively, a pair of parallel circuits each comprising a pair of series-connected diodes and a reactor connected in parallel with said series-connected diodes and said reactor being connected in series with a respective one of said current control elements, and a pair of voltage spike absorbing circuits, each of said voltage spike absorbing circuits being connected in parallel with a circuit including one of said series-connected diodes and a respective one of said current control elements.
Claim 2
Dependent Claim
130 words
An inverter device comprising: a DC power source, a pair of series-connected current control elements, said series-connected current control elements being connected in series with said DC power source so that a load connected to a junction between said current control elements is supplied with an output voltage by switching said current control elements alternatively, a pair of parallel circuits each comprising a pair of series-connected diodes and a reactor connected in parallel with said series-connected diodes and said reactor being connected in series with a respective one of said current control elements, and a pair of voltage spike absorbing circuits, each of said voltage spike absorbing circuits being connected in parallel with a circuit including one of said series-connected diodes and a respective one of said current control elements.
Claim 3
Dependent Claim
26 words
The inverter as claimed in claim 1, wherein each said voltage spike absorbing circuit comprises a resistor and a capacitor connected in series with said resistor.
Claim 4
Dependent Claim
31 words
The inverter as claimed in claim 2, wherein said voltage spike absorbing circuit further comprises at least one of a diode and a Zener diode connected in parallel with said capacitor.
Claim 5
Dependent Claim
18 words
The inverter as claimed in claim 1, wherein each said current control element comprises a field effect transistor.
Claim 6
Dependent Claim
13 words
The inverter as claimed in claim 1 wherein said reactors are magnetically coupled.
Claim 7
Dependent Claim
31 words
The inverter as claimed in claim 1, wherein one terminal of each of said voltage spike absorbing circuits is connected to a junction of respective ones of said series connected diodes.
Claim 8
Dependent Claim
34 words
The inverter as claimed in claim 6, wherein a second terminal of each of said voltage spike absorbing circuits is connected to a source terminal of a respective one of said field effect transistors.
Claim 9
Dependent Claim
18 words
The inverter as claimed in claim 1, wherein each of said current control elements comprises a bipolar transistor.
Claim 10
Dependent Claim
21 words
The inverter as claimed in claim 8, further comprising a diode connected across an emitter-collector circuit of each of said transistors.
Claim 11
Dependent Claim
35 words
The inverter as claimed in claim 1, wherein each of said current control elements comprises a device selected from the group consisting of a field effect transistor, an electrostatic induction transistor and a gate-turn-off thyristor.
Claim 12
Dependent Claim
25 words
The inverter as claimed in claim 1, wherein each of said voltage spike circuits comprises at least one of a diode and a zener diode.
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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) | 1989-06-09 | 1989-12-09 | 1990-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-09 | 1993-12-09 | 1994-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-09 | 1997-12-09 | 1998-06-10 | $7700.00 | Window Closed / Lapsed |