US Patent No: 8,203,304
Number of patents in Portfolio can not be more than 2000
Control method and system with feedback indicative of load flux
Stats
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Jun 19, 2012
Issued date -
Aug 31, 2007
filing date -
11/897,871
serial no -
In Force
status
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Abstract
Systems, methods, and devices are disclosed, including an induction-motor controller having a phase path; a solid-state switch interposed on the phase path; and a controller coupled to the solid-state switch. In certain embodiments, the controller is configured to switch the solid-state switch so that the solid-state switch is conductive during a conduction angle of a cycle of an incoming AC power waveform conveyed by the phase path, calculate the conduction angle based on a generally sinusoidal reference value that has a frequency lower than a frequency of the incoming AC power waveform, and adjust the generally sinusoidal reference value based on a value indicative of flux in a load coupled to the phase path.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 2007/0070,557 Self powered gate driver system | 2 | 2005 | |
| 7,227,326 System and method for transient-based motor speed estimation with transient excitation | 5 | 2006 | |
| 7,358,700 Induction motor controller | 2 | 2006 | |
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| 4,490,780 Digital power converter | 24 | 1983 | |
| 5,187,419 Electric motor control apparatus and method | 31 | 1991 | |
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| 5,347,277 Dual phase resolver to digital converter | 15 | 1992 | |
| 5,510,687 Electric motor controller with temperature protection | 34 | 1994 | |
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| 4,385,251 Flux shield for an inductor-alternator machine | 27 | 1981 | |
| 4,405,873 Rotor for a line-start permanent-magnet motor | 51 | 1981 | |
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| 6,218,749 Electric motor having rotor-embedded sensor | 10 | 1998 | |
| 6,504,275 Electric motor having rotor-embedded sensor | 16 | 2001 | |
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| 7,345,449 Method of rotating a polyphase motor at less than rated speed | 3 | 2005 | |
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| 5,068,811 Electrical control system for electrostatic precipitator | 22 | 1990 | |
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| 6,038,155 Three phase SCR rectifier bridge with soft start control IC | 15 | 1999 | |
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| 4,856,965 Control system of pumping operation using AC exciting generator-motor | 9 | 1988 | |
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| 6,351,397 Protection apparatus and protection method of PWM cycloconverter | 25 | 2001 | |
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| 6,172,498 Method and apparatus for rotor angle detection | 23 | 1998 | |
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| 5,859,514 Control method for a start-up control unit and an apparatus to make use of this method | 11 | 1996 | |
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| 4,581,696 Control method and apparatus for a UFC for minimizing input current distortions | 9 | 1984 | |
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