US4489372A
Expired / Lapsed
US
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Optical gate signal generating apparatus and thyristor converter apparatus including the same
Assignee: Toshiba Corp
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Filing: 1983-02-25
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Granted: 1984-12-18
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Expires: 2003-02-25
Abstract
Abstract An optical gate signal generating apparatus for firing a plurality of thyristors in a thyristor converter apparatus, including a circuit for generating an electrical gate signal, a plurality of first light emitting elements, each being connected to receive the electrical gate signal for generating a first optical signal. The apparatus also includes a plurality of auxiliary circuit, each including a series connection of a second light emitting element and a nonlinear element and being connected to receive the electrical gate signal for generating a second optical signal, each of the auxiliary circuits being connected in parallel with each of the first light emitting elements, and a plurality of light guides, each having a first, a second and a third branches, each of the light guides being connected to receive the first and second optical signals at ends of the first and second branches, respectively and for guiding the first and second optical signals to an end of the third branch to produce the optical gate signal. The thyristor converter apparatus including the optical gate signal generating apparatus is also disclosed.
Inventors
- 👤 Yukihiko Hatano
- 👤 Tadashi Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:37
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/08; H02M1/088; H02M1/092; H03; H03K; H03K17/00; H03K17/51; H03K17/78; H03K17/79
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
161 words
An optical gate signal generating apparatus for firing a plurality of thyristors in a thyristor converter apparatus, comprising: means for generating an electrical gate signal; a plurality of first light emitting elements, each being connected to receive said electrical gate signal for generating a first optical signal; a plurality of auxiliary circuits, each including a series connection of a second light emitting element and a nonlinear element and being connected to receive said electrical gate signal for generating a second optical signal, each of said auxiliary circuits being connected in parallel with each of said first light emitting elements; and a plurality of light guides, each having a first, a second and a third branches, each of said light guides being connected to receive said first and second optical signals at ends of said first and second branches, respectively and for guiding said first and second optical signals to an end of said third branch to produce said optical gate signal.
Claim 2
Dependent Claim
161 words
An optical gate signal generating apparatus for firing a plurality of thyristors in a thyristor converter apparatus, comprising: means for generating an electrical gate signal; a plurality of first light emitting elements, each being connected to receive said electrical gate signal for generating a first optical signal; a plurality of auxiliary circuits, each including a series connection of a second light emitting element and a nonlinear element and being connected to receive said electrical gate signal for generating a second optical signal, each of said auxiliary circuits being connected in parallel with each of said first light emitting elements; and a plurality of light guides, each having a first, a second and a third branches, each of said light guides being connected to receive said first and second optical signals at ends of said first and second branches, respectively and for guiding said first and second optical signals to an end of said third branch to produce said optical gate signal.
Claim 3
Dependent Claim
17 words
The optical gate signal generating apparatus according to claim 1, wherein said nonlinear element includes a diode.
Claim 4
Dependent Claim
17 words
The optical gate signal generating apparatus according to claim 2, wherein said diode includes a Zener diode.
Claim 5
Dependent Claim
17 words
The optical gate signal generating apparatus according to claim 1, wherein said nonlinear element includes a thyristor.
Claim 6
Dependent Claim
24 words
The optical gate signal generating apparatus according to claim 1, wherein said plurality of first light emitting elements are connected in a series connection.
Claim 7
Dependent Claim
24 words
The optical gate signal generating apparatus according to claim 1, wherein said plurality of first light emitting elements are connected in a parallel connection.
Claim 8
Dependent Claim
24 words
The optical gate signal generating apparatus according to claim 1, wherein said plurality of first light emitting elements are connected in a series-parallel connection.
Claim 9
Dependent Claim
47 words
The optical gate signal generating apparatus according to claim 1, wherein said first light emitting element includes a first light emitting diode, and said second light emitting element includes a second light cmitting diode having substantially the same performance as that of the first light emitting diode.
Claim 10
Dependent Claim
44 words
The optical gate signal generating apparatus according to claim 1, wherein said first light emitting element includes a first laser element, and said second light emitting element includes a second laser element having substantially the same performance as that of said first laser element.
Claim 11
Dependent Claim
186 words
A thyristor converter apparatus, comprising: means for generating an electrical gate signal; a plurality of first light emitting elements, each being connected to receive said electrical gate signal for generating a first optical signal; a plurality of auxiliary circuit, each including a series connection of a second light emitting element and a nonlinear element and being connected to receive said electrical gate signal for generating a second optical signal, each of said auxiliary circuits being connected in parallel with each of said first light emitting elements; a plurality of light guides, each having a first, a second and a third branches, each of said light guides being connected to receive said first and second optical signals at ends of said first and second branches, respectively and for guiding said first and second optical signals to an end of said third branch to produce an optical gate signal; and a plurality of thyristors, each being connected to receive said optical gate signal from said end of said third branch of each of said light guides as a gate signal, thereby operating in accordance with said gate signal.
Claim 12
Dependent Claim
186 words
A thyristor converter apparatus, comprising: means for generating an electrical gate signal; a plurality of first light emitting elements, each being connected to receive said electrical gate signal for generating a first optical signal; a plurality of auxiliary circuit, each including a series connection of a second light emitting element and a nonlinear element and being connected to receive said electrical gate signal for generating a second optical signal, each of said auxiliary circuits being connected in parallel with each of said first light emitting elements; a plurality of light guides, each having a first, a second and a third branches, each of said light guides being connected to receive said first and second optical signals at ends of said first and second branches, respectively and for guiding said first and second optical signals to an end of said third branch to produce an optical gate signal; and a plurality of thyristors, each being connected to receive said optical gate signal from said end of said third branch of each of said light guides as a gate signal, thereby operating in accordance with said gate signal.
Claim 13
Dependent Claim
19 words
The thyristor converter apparatus according to claim 10, wherein said plurality of thyristors are connected in a series connection.
Claim 14
Dependent Claim
15 words
The thyristor converter apparatus according to claim 10, wherein said thyristor includes a light-triggered thyristor.
Claim 15
Dependent Claim
20 words
The thyristor converter apparatus according to claim 12, wherein said plurality of light-triggered thyristors are connected in a series connection.
Claim 16
Dependent Claim
68 words
The thyristor converter apparatus according to claim 10, further comprising a plurality of light-electricity converter means, each being provided between each of said light guides and each of said thyristors for receiving said optical gate signal from said end of said third branch of each of said light guides and for converting said optical gate signal into said gate signal, wherein, said thyristor includes an electrically triggered thyristor.
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) | 1987-12-18 | 1988-06-18 | 1988-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-18 | 1992-06-18 | 1992-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-18 | 1996-06-18 | 1996-12-18 | $7700.00 | Window Closed / Lapsed |