PATENT CLAIM ANALYSIS

Application Number: 16308795
Application Type: Utility
Filing Date: 2018-12
Publication Date: 2019-05
Patent Classification: ["363", "089000"]

Abstract:
It is an object of the present invention to provide a power factor correction device for three-phase AC-DC conversion which enables effective power factor correction and stable power conversion with a simple construction and control system. There is provided a power factor correction device comprising: first, second and third input terminals to which three-phase AC is inputted; a positive electrode terminal p and a negative electrode terminal n each connected to a load device; first, second and third transformers Tr, Ts, Tt each having a primary coil with an end connected to said first, second and third input terminals; one or more switching elements having ends D applied with the voltage of another end of said primary coil, other ends S connected to a common potential terminal on the side of said primary coil and control ends G; first, second and third rectifying devices D 1,  D 2,  D 3  having ends applied with the voltage of another end of said secondary coil so as to pass the current flow into said positive electrode terminal p; a smoothing condenser C disposed between said positive electrode terminal p and said negative electrode terminal n; wherein the control ends of said switching elements are controlledby a single control signal having a constant duty ratio.

Claim (Index 16):
The power factor correction device of  claim 1 , further comprising a duty ratio controller which is applied to a pulse width modulation (PWM) control integrated circuit (IC) having an output terminal outputting the control signal and a control terminal inputted with a duty ratio control voltage for controlling the duty ratio of the control signal, the duty ratio controller having:\n a voltage detecting member detecting AC input voltage inputted into the power factor correction device and generating DC detection voltage proportional to the detected AC input voltage, a current path passing current which is variable in accordance with the variation of the generated DC detection voltage, a first resistance element disposed on the current path and having a variable resistance value, and a second resistance element disposed on the current path and having a constant resistance value, the first and second resistance elements being serially aligned, whereby the current passing through the second resistance element is controlled by adjusting the resistance vale of the first resistance element, and the end-to-end voltage of the second resistance element is outputted to the PWM control IC as the duty ratio control voltage.

Metadata:
- Claim Count in Document: 20.0
- Percentile: 98.0
- Lexical Diversity: 2.23301
- Patent Class: 363.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['10541521', '13438398', '10547775', '15177543', '12551584']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7919454762746981
- 35 USC 102 Novelty (BERT): 0.4888804070173565
- Combined Prediction Score: 0.761638969348964
- Mean Citation Score: 225.51044
- Max Citation Score: 232.85144
- Similarity Product: 170.8626518146324

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 0
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test