POWER FACTOR CORRECTION CIRCUIT
First Claim
1. A power factor correction circuit correcting a power factor of AC voltage, comprising:
- a rectifying unit stopping rectifying the AC voltage in a transient state and generating an rectified voltage by rectifying the AC voltage in a steady state;
a power factor correction unit generating a power-factor-corrected voltage by correcting the rectified voltage;
a smoothing unit generating a smoothed voltage by smoothing the power-factor-corrected voltage; and
an inrush current limiting unit providing a limited current by limiting an inrush current generated by the AC voltage in the transient state and stopping providing a current to the smoothing unit.
1 Assignment
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Accused Products
Abstract
Provided is a power factor correction circuit correcting a power factor of AC voltage. The power factor correction circuit includes: a rectifying unit stopping rectifying the AC voltage in a transient state and generating an rectified voltage by rectifying the AC voltage in a steady state; a power factor correction unit generating a power-factor-corrected voltage by correcting the rectified voltage; a smoothing unit generating a smoothed voltage by smoothing the power-factor-corrected voltage; and an inrush current limiting unit providing a limited current by limiting an inrush current generated by the AC voltage in the transient state and stopping providing a current to the smoothing unit.
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Citations
20 Claims
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1. A power factor correction circuit correcting a power factor of AC voltage, comprising:
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a rectifying unit stopping rectifying the AC voltage in a transient state and generating an rectified voltage by rectifying the AC voltage in a steady state; a power factor correction unit generating a power-factor-corrected voltage by correcting the rectified voltage; a smoothing unit generating a smoothed voltage by smoothing the power-factor-corrected voltage; and an inrush current limiting unit providing a limited current by limiting an inrush current generated by the AC voltage in the transient state and stopping providing a current to the smoothing unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A power factor correction circuit comprising:
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a plurality of bridge diodes; a power factor correction unit having an input terminal connected to an output terminal of the plurality of bridge diodes; a smoothing capacitor having one end connected to an output terminal of the power factor correction unit; a switch having one end to which AC voltage is applied; a diode having one end connected to the other end of the switch; a register having one end connected to the other end of the diode; and a current control signal generation unit turning on the switch in a transient state and preventing a current from flowing into two upper bridge diodes among the plurality of bridge diodes to allow the register to provide a limited size of current to the smoothing capacitor. - View Dependent Claims (10, 11, 12)
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13. A method of operating a power factor correction circuit correcting a power factor of AC voltage, the method comprising:
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determining whether the power factor correction circuit is in a transient state; limiting an inrush current generated by the AC voltage when the power factor correction circuit in the transient state; generating a rectified voltage by rectifying the AC voltage when the power factor correction circuit is in a steady state; generating a power-factor-corrected voltage by power-factor-correcting the rectified voltage; and generating a smoothed voltage by smoothing the power-factor-corrected voltage. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification