PATENT CLAIM ANALYSIS

Application Number: 15764885
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-11
Patent Classification: ["327", "464000"]

Abstract:
A semiconductor switching string includes series-connected semiconductor switching assemblies, each having a main semiconductor switching element that, when switched on, conducts current flow from a first terminal to a second terminal, and that, while turning off, transitions from a reverse recovery mode in which a reverse recovery current flows from the second terminal to the first terminal to a blocking mode in which no current flows. Each main semiconductor switching element has an active auxiliary circuit, each including an auxiliary semiconductor switching element and a resistive element. Each control unit is connected with each auxiliary semiconductor switching element. Each control unit switches a respective auxiliary semiconductor switching element into a conducting state to divert current through the corresponding resistive element. Each control unit having the auxiliary semiconductor switching elements in their conducting state simultaneously while each main semiconductor switching element is operating in reverse recovery mode or blocking mode.

Claim (Index 1):
A semiconductor switching string, for use in a HVDC power converter, comprising:\n a plurality of series-connected semiconductor switching assemblies, each semiconductor switching assembly having a main semiconductor switching element, each main semiconductor switching element when switched on operating in a conducting mode in which a conducting current flows from a first terminal thereof to a second terminal thereof, each main semiconductor switching element while turning off transitioning from a reverse recovery mode in which a reverse recovery current flows from the second terminal to the first terminal to a blocking mode in which no current flows between the first terminal and second terminal, each main semiconductor switching element having an active auxiliary circuit electrically connected between the first and second terminals thereof, and each active auxiliary circuit including an auxiliary semiconductor switching element and a resistive element connected in series with one another; and a control unit operatively connected with each auxiliary semiconductor switching element, the control unit being configured to switch a respective auxiliary semiconductor switching element into a conducting state to divert current through the corresponding resistive element, and the control unit being further configured to have all of the auxiliary semiconductor switching elements in their conducting state simultaneously at least while each main semiconductor switching element is operating in one of its reverse recovery mode or its blocking mode, whereby when a given main semiconductor switching element transitions to operating in its blocking mode a voltage thereacross is determined solely by a voltage across the resistive element in the corresponding active auxiliary circuit electrically connected between the first and second terminals of the said given main semiconductor switching element.

Metadata:
- Claim Count in Document: 20.0
- Percentile: 90.0
- Lexical Diversity: 2.43939
- Patent Class: 327.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15532511', '14898095', '14423067', '14898098', '14423050']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7773521755759918
- 35 USC 102 Novelty (BERT): 0.4840275391345411
- Combined Prediction Score: 0.7480197119318468
- Mean Citation Score: 229.262998
- Max Citation Score: 249.92372000000003
- Similarity Product: 206.66028677513603

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