Electric power conversion systems – Current conversion – With means to introduce or eliminate frequency components
Patent
1999-05-06
2000-03-21
Wong, Peter S.
Electric power conversion systems
Current conversion
With means to introduce or eliminate frequency components
363 98, H02M 112
Patent
active
060409894
ABSTRACT:
A device and method for providing three-phase pulse-width modulated sine waves includes an inverter including first, second and third legs, and first and second PWM generators, the first PWM generator is coupled to selectively provide an output to the first inverter leg or the third inverter leg, and the second PWM generator is coupled to selectively provide an output to the second inverter leg or the third inverter leg. The first PWM generator provides an output to the first inverter leg during first and second 120.degree. segments of a 360.degree. electrical cycle, and the first PWM generator provides an output to the third inverter leg during a third 120.degree. segment. The second PWM generator provides an output to the third inverter leg during the first 120.degree. segment, and the second PWM generator provides an output to the second inverter leg during the second and third 120.degree. segments, thus providing generation of three-phase pulse-width modulated sine waves using fewer than three pulse-width modulators.
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Thorn J. Stephen
Woodward Arthur E.
Emerson Electric Co
Gleason Mark L.
Laxton Gary L.
Wong Peter S.
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