PATENT CLAIM ANALYSIS

Application Number: 15866239
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2019-06
Patent Classification: ["363", "021030"]

Abstract:
The zero voltage switching quasi-resonant PFC buck-boost converter is directed to a circuit and method of operating the circuit that provides improved efficiency, decreased switching losses and operation at higher frequencies as compared to conventional bridgeless PFC buck-boost converter. The zero voltage switching quasi-resonant PFC buck-boost converter includes a buck transistor switch coupled to an input AC voltage source, a PFC transistor switch and a PFC diode coupled to an output voltage bulk capacitor, and a zero crossing detect inductor magnetically coupled to a buck-boost inductor for determining minimum voltage levels at which to turn ON the buck transistor switch and the PFC transistor switch. The zero voltage switching quasi-resonant PFC buck-boost converter with voltage shifter control addresses the problems of conventional bridgeless PFC buck-boost converters by using different voltage modes and zero crossing detection control.

Claim (Index 1):
A bridgeless power factor correction buck-boost converter comprising:\n a first transistor switch coupled to a first node of an AC voltage source; a first diode comprising a cathode coupled to the first transistor switch; a first inductor coupled to the first transistor and to the cathode of the first diode; a second transistor switch coupled to the first inductor; a second diode comprising an anode coupled to the first inductor and to the second transistor switch; an output capacitor coupled to a cathode of the second diode; a second inductor magnetically coupled to the first inductor; and a controller coupled to control switching of the first transistor switch and the second transistor switch, wherein the controller is further coupled to the second inductor to determine zero crossing detection.

Metadata:
- Claim Count in Document: 8.0
- Percentile: 86.0
- Lexical Diversity: 2.05797
- Patent Class: 363.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14262660', '14586151', '14337497', '13429028', '12429465']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8420060306652898
- 35 USC 102 Novelty (BERT): 0.5095525807734288
- Combined Prediction Score: 0.8087606856761037
- Mean Citation Score: 303.300748
- Max Citation Score: 322.2747
- Similarity Product: 291.343680802238

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