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US6744650B2
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Method for controlling a matrix converter
Assignee: Siemens Corp
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Filing: 2003-05-22
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Granted: 2004-06-01
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Expires: 2023-05-22
Abstract
Abstract A method is described for controlling a matrix converter which includes nine bi-directional circuit-breakers arranged in a 3×3 switch matrix. A commutation sequence is selected based on detected linked input voltages and a predetermined limit value and compared with a calculated commutation sequence. If these two do not agree, the switching states of the calculated commutation sequence are rearranged into the selected commutation sequence. In this way, it is possible to operate a matrix converter without requiring a precise measurement of the polarity of the input voltages, which eliminates the risk of a commutation short circuit.
Inventors
- 👤 Jochen Mahlein
- 👤 Olaf Simon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:27
CPC Classifications
H; H02; H02M; H02M5/00; H02M5/02; H02M5/04; H02M5/22; H02M5/25; H02M5/257; H02M5/2573; H02M5/27; H02M5/271
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
132 words
A method for controlling a matrix converter, with nine bidirectional power switches arranged in a 3×3 switch matrix, comprising the step of: determining switching states with associated time periods for each half modulation interval in a calculated commutation sequence depending on a calculated output voltage space vector of the matrix converter; selecting a commutation sequence for a half modulation interval depending on measured input voltages and a predetermined limit value, with the commutation sequence selected so as to prevent commutation between input voltages having close potentials; comparing the selected commutation sequence with a calculated commutation sequence; and if the selected commutation sequence is different from the calculated commutation sequence, rearranging the switching states with the associated time periods so as to make the selected commutation sequence identical to the calculated commutation sequence.
Claim 2
Independent Claim
132 words
A method for controlling a matrix converter, with nine bidirectional power switches arranged in a 3×3 switch matrix, comprising the step of: determining switching states with associated time periods for each half modulation interval in a calculated commutation sequence depending on a calculated output voltage space vector of the matrix converter; selecting a commutation sequence for a half modulation interval depending on measured input voltages and a predetermined limit value, with the commutation sequence selected so as to prevent commutation between input voltages having close potentials; comparing the selected commutation sequence with a calculated commutation sequence; and if the selected commutation sequence is different from the calculated commutation sequence, rearranging the switching states with the associated time periods so as to make the selected commutation sequence identical to the calculated commutation sequence.
Claim 3
Dependent Claim
27 words
The method of claim 1 , wherein the predetermined limit value is selected so that the selected commutation sequence is valid for an entire input voltage sector.
Claim 4
Dependent Claim
36 words
The method of claim 1 , wherein the predetermined limit value is selected so that the selected commutation sequence is valid only for a first region about a value of Zero of a linked input voltage.
Claim 5
Dependent Claim
29 words
The method of claim 3 , wherein any desirable commutation sequence can be selected for a region of an input voltage sector that is different from the first region.
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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) | 2007-06-01 | 2007-12-01 | 2008-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-06-01 | 2011-12-01 | 2012-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-06-01 | 2015-12-01 | 2016-06-01 | $7700.00 | Window Closed / Lapsed |