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 6):
A power factor correction device comprising:\n (a) first, second, and third input terminals to which three-phase alternating current (AC) is inputted; (b) a positive electrode terminal and a negative electrode terminal; (c) first, second, and third transformers respectively having primary coils with first ends respectively connected to the first, second, and third input terminals, first secondary coils with second ends respectively connected to the negative electrode terminal and second secondary coils with first ends respectively connected to the negative electrode terminal; (d) one or more switching elements having control ends on-off controlled so as to selectively open and close a current path between second ends of the primary coils of the first, second, and third transformers and a common potential terminal on a side of the primary coils; (e) first, second, and third rectifying devices respectively disposed between the first ends of the first secondary coils of the first, second, and third transformers and the positive electrode terminal so as to pass current flow into the positive electrode terminal when the first ends of the first secondary coils have forward-biased potentials and block current flow into the positive electrode terminal when the first ends of the first secondary coils have reverse-biased potentials; (f) fourth, fifth, and sixth rectifying devices respectively disposed between the second ends of the second secondary coils of the first, second, and third transformers and the positive electrode terminal so as to pass current flow into the positive electrode terminal when the second ends of the second secondary coils have forward-biased potentials and block current flow into the positive electrode terminal when the second ends of the second secondary coils have reverse-biased potentials; and (g) a smoothing condenser disposed between the positive electrode terminal and the negative electrode terminal; wherein (h) the control ends of the one or more switching elements are controlled by a single control signal having a constant duty ratio.

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): 0.7935697171557199
- 35 USC 102 Novelty (BERT): 0.4783115509520058
- Combined Prediction Score: 0.7620439005353485
- Mean Citation Score: 225.51044
- Max Citation Score: 232.85144
- Similarity Product: 193.6672400436735

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

Dataset: test