Patent EP0397128A2 successfully refreshed from Google Patents.
EP0397128A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Frequency-independent singlephase to three-phase AC power conversion
Assignee: APC Onsite Inc
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Filing: 1990-05-09
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Granted: —
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Expires: 2010-05-09
Abstract
Abstract Three-phase power-conversion wherein the frequency output voltage is independent of the frequency of input voltage. One of three input terminals in a load powered by the apparatus is directly grounded. Each of the other two input terminals is supplied a sinusoidal voltage artifact from an appropriate transform circuit which is driven by a microprocessor, with one of these artifacts having a form 1.73αSinA, and the other having the form of 1.73αSin(A + 60°), where α is the nominal amplitude of the source voltage and the Expressions A and (A + 60°) are the respective phase angles. Operation of the microprocessor controls output frequency.
Inventors
- 👤 Theodore G. Hollinger
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 00:52
CPC Classifications
H; H02; H02M; H02M5/00; H02M5/02; H02M5/04; H02M5/10; H02M5/14; H02M5/40; H02M5/42; H02M5/44; H02M5/453; H02M5/458
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
159 words
Apparatus for supplying to the three input terminals in a three-phase electrical load, operating power from the two output terminals in a power source, comprising algorithm-controlled computer means, first transform means operatively connected to said computer means, to such two output terminals, and to one of such input terminals, for driving power from the output terminals and for supplying to the one input terminal, under the control of said computer means, a sinusoidal voltage artifact having the form of 1.73αSinA, where α is the amplitude of the voltage, and A is the phase angle, second transform means operatively connected to said computer means, to such two output terminals, and to another one of such input terminals, for deriving power from the two output terminals and for supplying to such other input terminal, under the control of said computer means, a sinusoidal voltage artifact having the form of 1.73αSin(A + 60°), and ground means grounding the load's third input terminal.
Claim 2
Dependent Claim
159 words
Apparatus for supplying to the three input terminals in a three-phase electrical load, operating power from the two output terminals in a power source, comprising algorithm-controlled computer means, first transform means operatively connected to said computer means, to such two output terminals, and to one of such input terminals, for driving power from the output terminals and for supplying to the one input terminal, under the control of said computer means, a sinusoidal voltage artifact having the form of 1.73αSinA, where α is the amplitude of the voltage, and A is the phase angle, second transform means operatively connected to said computer means, to such two output terminals, and to another one of such input terminals, for deriving power from the two output terminals and for supplying to such other input terminal, under the control of said computer means, a sinusoidal voltage artifact having the form of 1.73αSin(A + 60°), and ground means grounding the load's third input terminal.
Claim 3
Dependent Claim
28 words
The apparatus of claim 1, wherein each of said transform means includes no more than two electronic power switches operatively connected to and controlled by said computer means.
Claim 4
Independent Claim
32 words
The apparatus of claims 1 or 2, wherein the frequencies of such voltage artifacts are the same as one another, and are independent of the frequency of voltage supplied by the source.
Claim 5
Dependent Claim
19 words
The apparatus of claim 3, wherein the frequencies of artifacts are variable under the control of said computer means.
Claim 6
Dependent Claim
175 words
Apparatus for supplying to the three input terminals in a three-phase electrical load, operating power from the two output terminals in a single-phase sinusoidal power source which supplies a voltage in the form of αsinA, where α is the amplitude of the voltage, and A is the phase angle, said apparatus, in operative condition, comprising algorithm-controlled computer means, first transform means operatively connected to said computer means, to such two output terminals, and to one of such input terminals, for driving power from the output terminals and for supplying to the one input terminal, under the control of said computer means, a sinusoidal voltage artifact having the form of 1.73αSinA, second transform means operatively connected to said computer means, to such two output terminals, and to another one of such input terminals, for deriving power from the two output terminals and for supplying to such other input terminal, under the control of said computer means, a sinusoidal voltage artifact having the form of 1.73αSin(A + 60°), and ground means grounding the load's third input terminal.
Claim 7
Dependent Claim
175 words
Apparatus for supplying to the three input terminals in a three-phase electrical load, operating power from the two output terminals in a single-phase sinusoidal power source which supplies a voltage in the form of αsinA, where α is the amplitude of the voltage, and A is the phase angle, said apparatus, in operative condition, comprising algorithm-controlled computer means, first transform means operatively connected to said computer means, to such two output terminals, and to one of such input terminals, for driving power from the output terminals and for supplying to the one input terminal, under the control of said computer means, a sinusoidal voltage artifact having the form of 1.73αSinA, second transform means operatively connected to said computer means, to such two output terminals, and to another one of such input terminals, for deriving power from the two output terminals and for supplying to such other input terminal, under the control of said computer means, a sinusoidal voltage artifact having the form of 1.73αSin(A + 60°), and ground means grounding the load's third input terminal.
Claim 8
Dependent Claim
28 words
The apparatus of claim 5, wherein each of said transform means includes no more than two electronic power switches operatively connected to and controlled by said computer means.
Claim 9
Independent Claim
32 words
The apparatus of claims 5 or 6, wherein the frequencies of such voltage artifacts are the same as one another, and are independent of the frequency of voltage supplied by the source.
Claim 10
Dependent Claim
19 words
The apparatus of claim 7, wherein the frequencies of artifacts are variable under the control of said computer means.
References Cited (Backward Citations)
No citation records indexed.
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