PATENT CLAIM ANALYSIS

Application Number: 15950666
Application Type: Utility
Filing Date: 2018-04
Publication Date: 2018-11
Patent Classification: ["363", "132000"]

Abstract:
An ANPC inverter, a zero-crossing switching method and a zero-crossing switching apparatus of the ANPC inverter are provided. The method includes: controlling switch states of switch devices in a bridge leg to change according to a preset logic when zero-crossing switching occurs in an output voltage instruction of the bridge leg, so as to prevent overvoltage in the switch device in the bridge leg. The preset logic includes switching among a sequence of switch state combinations. Switch state combinations of the switch devices before and after the zero-crossing switching occurs are defined as the first and second switch state combinations of the sequence. The second to the penultimate switch state combinations are all safe switch state combinations selected in advance, in each of which a maximum voltage borne by the switch devices in the bridge leg is clamped to a safe limit value.

Claim (Index 5):
A zero-crossing switching apparatus of an active neutral point clamped inverter, comprising:\n an acquiring unit configured to acquire an output voltage instruction of a bridge leg of the active neutral point clamped inverter; a determining unit configured to determine whether zero-crossing switching occurs in the output voltage instruction; and a switching control unit configured to control switch states of all of switch devices in the bridge leg to change according to a preset logic, in a case that the determining unit determines that the zero-crossing switching occurs in the output voltage instruction; wherein the preset logic comprises switching among a sequence of switch state combinations, a switch state combination of all of the switch devices in the bridge leg of the active neutral point clamped inverter before the zero-crossing switching occurs in the output voltage instruction of the bridge leg is defined as the first switch state combination of the sequence, and a switch state combination of all of the switch devices in the bridge leg after the zero-crossing switching occurs in the output voltage instruction of the bridge leg is defined as the last switch state combination of the sequence, and in transition from the first switch state combination to the last switch state combination, the second switch state combination to the penultimate switch state combination are all safe switch state combinations selected in advance, and in each of the safe switch state combinations, a maximum voltage borne by the switch devices in the bridge leg is clamped to a safe limit value.

Metadata:
- Claim Count in Document: 15.0
- Percentile: 91.0
- Lexical Diversity: 2.33846
- Patent Class: 363.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15662044', '12095546', '15806352', '14153103', '14211719']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7672335589220898
- 35 USC 102 Novelty (BERT): 0.4927592382330565
- Combined Prediction Score: 0.7397861268531866
- Mean Citation Score: 201.902512
- Max Citation Score: 238.01175
- Similarity Product: 185.85792828154564

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