Power factor corrector with efficient ripple attenuator
AssigneePowersine Ltd.
InventorYair Darshan
Life of this patent
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Abstract
Power supply apparatus includes a power factor corrector (PFC) unit, which is adapted to receive an AC voltage from an AC source, and to smooth the AC voltage while adjusting a waveform of an AC input current from the AC source relative to the AC voltage so as to generate a PFC output voltage made up of a DC component with a residual AC ripple. A regulator is coupled to receive an indication of a ripple amplitude and a ripple phase of the residual AC ripple and to generate, responsive thereto, a correction voltage which is combined with the PFC voltage to generate a DC output voltage in which the AC ripple is substantially reduced relative to the PFC voltage.
Claims44
Power supply apparatus, comprising:
- a power factor corrector (PFC) unit, which is adapted to receive an AC voltage from an AC source, and to smooth the AC voltage while adjusting a waveform of an AC input current from the AC source relative to the AC voltage so as to generate a PFC voltage made up of a DC component with a residual AC ripple;
- and
- a regulator, coupled to receive an indication of a ripple amplitude and a ripple phase of the residual AC ripple and to generate, responsive thereto, a correction voltage which is combined with the PFC voltage to generate a DC output voltage in which the AC ripple is substantially reduced relative to the PFC voltage.
A method for supplying DC power, comprising:
- smoothing an AC voltage received from an AC source while performing power factor correction on a waveform of an AC input current from the AC source relative to the AC voltage, so as to generate a PFC voltage made up of a DC component with a residual AC ripple;
- receiving an indication of a ripple amplitude and a ripple phase of the residual AC ripple;
- generating, responsive to the indication, a correction voltage;
- and
- combining the correction voltage with the PFC voltage to generate a DC output voltage in which the AC ripple is substantially reduced relative to the PFC voltage.
Dependencies are inferred from the claim text.