US4827392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control apparatus for a power converter
Assignee: Toshiba Corp
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Filing: 1988-07-25
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Granted: 1989-05-02
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Expires: 2008-07-25
Abstract
Abstract In a control apparatus for a power converter for controlling a power converter on the basis of stored values of a memory adapted to store variables over a fixed time period of the power converter while sequentially updating them, when an abnormal state occurs in the power converter, writing into the memory is stopped to effect a control using data having been stored immediately before that abnormal state occurs, thus to restart writing into the memory at the time when that abnormal state is removed.
Inventors
- 👤 Yasuhiko Miguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:39
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/36; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/53; H02M7/537; H02M7/5387; H02M7/53871
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
125 words
A control apparatus for a power converter comprising: a memory capable of storing variables of said power converter over a fixed time period; means for controlling said power converter on the basis of values of said variables stored in said memory; abnormal state detection means for detecting an abnormal state of said power converter; and writing control means that sequentially updates the contents of said memory by writing a newest variable into said memory when said abnormal state detection means does not detect an abnormal state, stops writing into said memory when said abnormal state detection means detects an abnormal state, and restarts writing into said memory when said power converter returns to a normal state or is expected to return to a normal state.
Claim 2
Dependent Claim
125 words
A control apparatus for a power converter comprising: a memory capable of storing variables of said power converter over a fixed time period; means for controlling said power converter on the basis of values of said variables stored in said memory; abnormal state detection means for detecting an abnormal state of said power converter; and writing control means that sequentially updates the contents of said memory by writing a newest variable into said memory when said abnormal state detection means does not detect an abnormal state, stops writing into said memory when said abnormal state detection means detects an abnormal state, and restarts writing into said memory when said power converter returns to a normal state or is expected to return to a normal state.
Claim 3
Dependent Claim
16 words
A control apparatus as set forth in claim 1, wherein said memory includes a ring buffer.
Claim 4
Dependent Claim
29 words
A control apparatus as set forth in claim 1, wherein said writing control means includes a switch for controlling timings of stopping and restarting of writing into said memory.
Claim 5
Dependent Claim
173 words
A control apparatus for a power converter comprising: first and second memories capable of storing variables of said power converter over a fixed time period; means for controlling said power converter on the basis of values of said variables stored in said first memory; abnormal state detection means for detecting an abnormal state of said power converter; and writing control means that sequentially updates the contents of said memories by writing a newest variable into said first memory and writing the variable stored in said first memory at a corresponding location of said second memory when said abnormal state detection means does not detect an abnormal state, stops writing into said first memory and replaces variables written in said first memory immediately before stopping writing with variables stored in the corresponding location of said second memory when said abnormal state detection means detects an abnormal state, and restarts writing into said first and second memories when said power converter returns to a normal state or is expected to return to a normal state.
Claim 6
Dependent Claim
173 words
A control apparatus for a power converter comprising: first and second memories capable of storing variables of said power converter over a fixed time period; means for controlling said power converter on the basis of values of said variables stored in said first memory; abnormal state detection means for detecting an abnormal state of said power converter; and writing control means that sequentially updates the contents of said memories by writing a newest variable into said first memory and writing the variable stored in said first memory at a corresponding location of said second memory when said abnormal state detection means does not detect an abnormal state, stops writing into said first memory and replaces variables written in said first memory immediately before stopping writing with variables stored in the corresponding location of said second memory when said abnormal state detection means detects an abnormal state, and restarts writing into said first and second memories when said power converter returns to a normal state or is expected to return to a normal state.
Claim 7
Dependent Claim
20 words
A control apparatus as set forth in claim 4, wherein said first and second memories include a ring buffer, respectively.
Claim 8
Dependent Claim
35 words
A control apparatus as set forth in claim 4, wherein said writing control means includes a switch for controlling times of stopping and restarting of writing into said first memory, and rewriting of variables therein.
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) | 1992-05-01 | 1992-10-31 | 1993-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-01 | 1996-10-31 | 1997-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-01 | 2000-10-31 | 2001-05-02 | $7700.00 | Window Closed / Lapsed |