PATENT CLAIM ANALYSIS

Application Number: 15861886
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2019-07
Patent Classification: ["361", "033000"]

Abstract:
A method and controller to automatically determine a grounding condition of a motor drive, in which an inverter is operated at a predetermined frequency while a load resistor is connected between a single phase of a motor drive inverter output and a reference node, a leakage flux linkage value is computed according to a neutral-ground voltage of the motor drive, and a processor determines whether the motor drive is solid grounded, high-resistance grounded, or floating according to the leakage flux linkage value. In certain examples, the processor automatically turns the inverter off while the load resistor is connected between the single phase of the inverter output and the reference node, and automatically determines whether the motor drive is delta corner grounded according to the neutral-ground voltage.

Claim (Index 1):
A motor drive, comprising:\n a filter with an input to receive an AC input signal, an output, and a filter neutral node; a rectifier, including an input to receive a filtered AC signal from the filter, and an output to provide a DC bus voltage signal; a DC bus circuit, including first and second DC bus capacitors, and a DC bus internal node that joins the DC bus capacitors; an inverter, including an inverter input connected to the DC bus circuit, an inverter output; and a controller, including a processor configured to execute program instructions from an electronic memory while a load resistor is connected between a single phase of the inverter output and a reference node to automatically: operate the inverter at a predetermined frequency and measure a neutral-ground voltage, to automatically compute a leakage flux linkage value according to the neutral-ground voltage, and to automatically determine whether the motor drive is solid grounded, high-resistance grounded, or floating according to the leakage flux linkage value.

Metadata:
- Claim Count in Document: 12.0
- Percentile: 86.0
- Lexical Diversity: 2.32759
- Patent Class: 361.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15410000', '15409919', '13400537', '13077212', '14296502']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8248591435172488
- 35 USC 102 Novelty (BERT): 0.4609217667738687
- Combined Prediction Score: 0.7884654058429108
- Mean Citation Score: 163.25064600000005
- Max Citation Score: 195.9145
- Similarity Product: 168.00776888573168

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