PATENT CLAIM ANALYSIS

Application Number: 15980794
Application Type: Utility
Filing Date: 2018-05
Publication Date: 2019-02
Patent Classification: ["363", "132000"]

Abstract:
A method and a device for voltage balancing of DC bus capacitors of an NPC four-level inverter are disclosed. The method includes: determining an optimal zero-sequence voltage, determining an actual reference voltage of each phase based on the optimal zero-sequence voltage; comparing respectively three preset carrier signals with the actual reference voltage of each phase to obtain three first control signals; determining three duty-cycle adjustment values based on a voltage of the intermediate bus capacitor; adjusting correspondingly the three first control signals based the three duty-cycle adjustment values to obtain three second control signals; inputting correspondingly the three second control signals to three first switches of an upper bridge corresponding to each phase; and inputting correspondingly complementary signals of the three second control signals to three second switches of a lower bridge corresponding to each phase.

Claim (Index 18):
The device according to  claim 17 , wherein when the actual reference voltage of each phase is greater than the amplitude of the carrier signal, the first control signal is high level, and when the actual reference voltage of each phase is less than or equal to the amplitude of the carrier signal, the first control signal is low level.

Metadata:
- Claim Count in Document: 1.0
- Percentile: 93.0
- Lexical Diversity: 2.41667
- Patent Class: 363.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['15109219', '15662044', '13912398', '14153103', '15823192']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7955176539211775
- 35 USC 102 Novelty (BERT): 0.5111410008790163
- Combined Prediction Score: 0.7670799886169614
- Mean Citation Score: 228.819082
- Max Citation Score: 246.3851
- Similarity Product: 158.4632163274884

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