Power conversion apparatus with harmonic filtration
First Claim
1. A power conversion apparatus with harmonic filtration, comprising:
- first power converter means for converting an input power from a power supply into an output power;
detector means, connected to an output side of the first power converter means, for detecting an output current and an output voltage of the first power converter means;
higher harmonic detector means, connected to the detector means, for detecting a higher harmonic component on a basis of the output current and the output voltage, and for producing current reference signal corresponding to the detected higher harmonic component; and
second power converter means for producing an inverse of the detected higher harmonic component according to the current reference signal, and combining the produced inverse of the higher harmonic component with the output current of the first power converter means such that the higher harmonic component in the output current of the first power converter means is cancelled by the inverse of the higher harmonic component.
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Accused Products
Abstract
A power conversion apparatus capable of eliminating inexpedient higher harmonic components from its output, without lowering the conversion efficiency. The apparatus includes a first power converter for converting an input power from a power supply into an output power; a detector for detecting an output current and an output voltage of the first power converter; a high harmonic detector for detecting a higher harmonic component on a basis of the output current and the output voltage, and for producing current reference signal corresponding to the detected higher harmonic component; and a second power converter for producing an inverse of the detected higher harmonic component according to the current reference signal, and combining the produced inverse of the higher harmonic component with the output current of the first power converter such that the higher harmonic component in the output current of the first power converter are cancelled by the inverse of the higher harmonic component.
70 Citations
13 Claims
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1. A power conversion apparatus with harmonic filtration, comprising:
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first power converter means for converting an input power from a power supply into an output power; detector means, connected to an output side of the first power converter means, for detecting an output current and an output voltage of the first power converter means; higher harmonic detector means, connected to the detector means, for detecting a higher harmonic component on a basis of the output current and the output voltage, and for producing current reference signal corresponding to the detected higher harmonic component; and second power converter means for producing an inverse of the detected higher harmonic component according to the current reference signal, and combining the produced inverse of the higher harmonic component with the output current of the first power converter means such that the higher harmonic component in the output current of the first power converter means is cancelled by the inverse of the higher harmonic component. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification