PATENT CLAIM ANALYSIS

Application Number: 15747387
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2018-08
Patent Classification: ["363", "021090"]

Abstract:
A circuit ( 100 ) for protecting a Switching Power Converter (“SPC”) when a short-circuit load condition occurs. The SPC has an output current sensor utilizing at least one current transformer that has a primary winding connected in series with a rectifier and has a magnetic core that should avoid saturation. A pulse-width modulator includes a skip controller providing a series of control pulses to at least one switch. A control pulse is skipped when an abnormally low load resistance causes an input current ramp signal to exceed an input current setpoint signal proximate a start time of a next control pulse of the series and the output current is greater than a predetermined threshold. Operation of the SPC is stopped if more than a predetermined number of consecutive switching cycles are skipped to prevent operation of the SPC while the core of an output current transformer is saturated.

Claim (Index 1):
A system for providing short-circuit protection for a Switching Power Converter (\u201cSPC\u201d), comprising:\n an input current sensor electrically connected to detect an input current of the SPC and configured to generate an input current ramp signal S ICR  representing the detected input current; an output current sensor electrically connected to detect an output current of the SPC by sensing a pulsing current flowing through an output rectifier of the SPC using at least one current transformer, and configured to generate an output current signal S OC  representing the detected output current; a feedback controller electrically connected to the output current sensor and configured to generate a current setpoint signal S CSP  having a voltage which is based on an error signal derived from a detected difference between the output current signal S OC  and a reference signal; and a current-mode pulse-width modulator electrically connected to the feedback controller and configured to\n generate a series of control pulses to be supplied to the SPC for selectively transitioning at least one switch of the SPC between an on state and an off state, each pulse of the control pulses beginning at a predetermined start time of a switching cycle and ending when either the input current ramp signal S ICR  exceeds the current setpoint signal S CSP  or the pulse's duration reaches a predetermined maximum value, \n skip generation of at least one control pulse of the series of control pulses when a first voltage level of the input current ramp signal S ICR  exceeds a second voltage level of the current setpoint signal S CSP  proximate a start time of the next control pulse of the series of control pulses, the first voltage level exceeding the second voltage level when an abnormally low load resistance is connected between output terminals of the SPC during operation of the SPC, and \n stop operations of the SPC if more than a predetermined number of consecutive switching cycles are skipped.

Metadata:
- Claim Count in Document: 4.0
- Percentile: 86.0
- Lexical Diversity: 1.75556
- Patent Class: 363.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['11596127', '11383878', '11694308', '13336467', '10421254']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7769056691924987
- 35 USC 102 Novelty (BERT): 0.4810632272384058
- Combined Prediction Score: 0.7473214249970894
- Mean Citation Score: 187.358464
- Max Citation Score: 204.2001
- Similarity Product: 160.00661639124158

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

Dataset: test