PATENT CLAIM ANALYSIS

Application Number: 15762509
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-10
Patent Classification: ["363", "053000"]

Abstract:
An IGBT short-circuit detection and protection circuit, comprising: a driving unit, the output end thereof outputting a PWM driving signal and being connected to gate ends of a first IGBT (IGBT1) and a second IGBT (IGBT2), so as to simultaneously control the turning ON/OFF of the first IGBT and the second IGBT; a comparing unit, comprising a threshold pin and a detection pin (Vdesat), the threshold pin being connected to a threshold voltage, the detection pin being connected by means of a first diode (D1) and a second diode (D3) to collectors (C) of the first IGBT and the second IGBT, respectively, the detection pin supplying a detection current to the first diode and the second diode, cathodes of the first diode and the second diode being connected to the collectors of the first IGBT and the second IGBT, respectively; when the voltage at the detection pin is higher than the threshold voltage, the driving unit controlling the first IGBT and the second IGBT to be turned off. The IGBT short-circuit detection protection circuit achieves bidirectional short-circuit protection of two IGBTs in inverse series connection, without requiring an additional protection circuit.

Claim (Index 7):
An IGBT-based controllable rectifier circuit, characterized by comprising: a three-phase AC power supply and three reverse-series-connected IGBT units, wherein each reverse-series-connected IGBT unit comprises a first IGBT and a second IGBT, an emitter of the first IGBT is connected to an emitter of the second IGBT, a collector of one of the first IGBT and the second IGBT is connected to one phase of the three-phase AC power supply, and a collector of the other one of the first IGBT and the second IGBT is connected to a collector of one of the other two IGBT units,\n wherein each IGBT unit further comprises: a drive unit, an output terminal thereof outputting a PWM drive signal, and being connected to gate terminals of the first IGBT and the second IGBT, to simultaneously control switching on of the first IGBT and the second IGBT; a comparison unit, having a threshold pin and a detection pin, the threshold pin being connected to a threshold voltage, the detection pin being connected to the collectors of the first IGBT and the second IGBT via a first diode and a second diode respectively, the detection pin supplying a detection current for the first diode and the second diode, and cathodes of the first diode and the second diode being connected to the collectors of the first IGBT and the second IGBT respectively, wherein when a voltage at the detection pin is greater than the threshold voltage, the drive unit controls the first IGBT and the second IGBT so that same switch off.

Metadata:
- Claim Count in Document: 20.0
- Percentile: 90.0
- Lexical Diversity: 2.82051
- Patent Class: 363.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14483846', '15910027', '14528888', '14478568', '14159945']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.822786184616563
- 35 USC 102 Novelty (BERT): 0.4923878677639189
- Combined Prediction Score: 0.7897463529312987
- Mean Citation Score: 258.446014
- Max Citation Score: 265.53662
- Similarity Product: 217.875918976537

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