PATENT CLAIM ANALYSIS

Application Number: 16365100
Application Type: Utility
Filing Date: 2019-03
Publication Date: 2019-07
Patent Classification: ["363", "021020"]

Abstract:
This disclosure describes a flyback converter with a series-parallel mode (SPM) active clamp. The active clamp, coupled in parallel with the primary coil, may include a clamp switch, two or more snubber capacitors, and associated diodes. The active clamp may be configured to absorb and retain the leakage energy from the leakage inductance of the flyback converter. The clamp switch may be turned on selectively as the primary switch approaches one of a plurality peak values to adjust frequencies of the switching devices. With the active clamp circuit, the flyback converter may first re-capture the leakage energy in the active clamp circuit and then recover it back to the power source.

Claim (Index 9):
A method for operating a power conversion apparatus, comprising:\n receiving an input voltage at a primary coil; providing an output voltage at a secondary coil, the secondary coil electromagnetically coupled to the primary coil; controlling a flow of current through the primary coil by using a first switch; and controlling a flow of current through an active clamp circuit by using a second switch, the active clamp circuit coupled in parallel with the primary coil and configured to absorb a leakage energy from a leakage inductance associated with the primary coil and the secondary coil, the active clamp circuit comprising a first capacitor and a secondary capacitor, wherein the first switch and second switch are controlled by a controller, the controller configured to:\n turn the first switch on, so as to store energy in the primary coil; \n turn the first switch off, so as to charge the first and the second capacitors in series; \n turn the second switch on when a voltage across the first switch approaches a peak value, so as to discharge the first and the second capacitors in parallel; and \n turn the second switch off when at least one of: a voltage across the first capacitor and a voltage across the second capacitor, falls to a predetermined voltage level.

Metadata:
- Claim Count in Document: 17.0
- Percentile: 99.0
- Lexical Diversity: 1.83582
- Patent Class: 363.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15829253', '15042885', '15585715', '11565549', '16071807']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8159050703896563
- 35 USC 102 Novelty (BERT): 0.5143971247840449
- Combined Prediction Score: 0.7857542758290952
- Mean Citation Score: 273.862258
- Max Citation Score: 290.68698
- Similarity Product: 266.9234997170699

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