PATENT CLAIM ANALYSIS

Application Number: 16157567
Application Type: Utility
Filing Date: 2018-10
Publication Date: 2019-04
Patent Classification: ["318", "375000"]

Abstract:
A motor drive device includes an inverter configured to convert a DC voltage to an AC voltage by switching power devices, a current detector configured to detect a current output from the inverter, a current controller configured to generate a voltage command, a control signal generator configured to control switching of the power devices, a dynamic brake circuit provided with relays and configured to short-circuit an output side terminal of the inverter via resistances, a storage configured to store an initial current value and a first threshold value, and a failure determiner configured to compare a current value and an initial current value after a predetermined time has elapsed since detection of the initial current value, and determine presence or absence of a failure based on a result of comparing a change rate of the current value from the initial current value with the first threshold value.

Claim (Index 1):
A motor drive device comprising:\n an inverter provided with a plurality of power devices and configured to convert a DC voltage to an AC voltage by switching the plurality of power devices; a current detector configured to detect a current output from the inverter; a current controller configured to generate a voltage command based on a current command and a value of the current detected by the current detector; a control signal generator configured to control switching of the plurality of power devices of the inverter based on the voltage command; a dynamic brake circuit provided with a plurality of relays and configured to short-circuit an output side terminal of the inverter via a plurality of resistances; a storage configured to store, when a current command is input to the current controller and at least two relays from among the plurality of relays are caused to conduct, an initial current value being an initial value of a current detected by the current detector and a first threshold value for determining presence or absence of a failure; and a failure determiner configured to compare, after a predetermined time has elapsed since detection of the initial current value, a current value and the initial current value, and determine presence or absence of a failure based on a result of comparing a change rate of the current value from the initial current value with the first threshold value, wherein the current value is a value of a current detected by the current detector when a current command is input to the current controller and at least two relays from among the plurality of relays are caused to conduct.

Metadata:
- Claim Count in Document: 13.0
- Percentile: 97.0
- Lexical Diversity: 2.1831
- Patent Class: 318.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['16146917', '15764559', '13134972', '13134971', '13612150']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6565962555331206
- 35 USC 102 Novelty (BERT): 0.4508084752387871
- Combined Prediction Score: 0.6360174775036873
- Mean Citation Score: 171.031454
- Max Citation Score: 174.12013000000005
- Similarity Product: 154.2099980379761

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