PATENT CLAIM ANALYSIS

Application Number: 15908860
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-09
Patent Classification: ["318", "806000"]

Abstract:
A motor drive apparatus includes: a converter which converts AC power to DC power and to output the DC power to a DC link; an inverter including power devices which converts the DC power to AC power for driving a motor; a capacitor provided in the DC link; a shut-off circuit to open and close an electrical path between the AC power source and the converter; a constant current control unit which performs control in such a manner as to allow a constant current supplied by the capacitor to pass through a detection target power device among the power devices in the inverter; and an abnormality detection unit which detects an abnormality in the detection target power device based on changes in voltage between a collector and an emitter of the detection target power device during a period in which the constant current passes through the detection target power device.

Claim (Index 2):
The motor drive apparatus according to  claim 1 , wherein the constant current control unit comprises:\n a shut-off command unit configured to issue a command to the shut-off circuit to shut off a supply of AC power from the AC power source to the converter; a current detection unit configured to detect a current passing from the inverter to the motor; and a gate voltage adjustment unit configured to adjust a gate voltage applied to a power device provided for a different phase and a different arm from the phase and the arm for which the detection target power device is provided, based on the current detected by the current detection unit, in such a manner as to allow the constant current supplied by the capacitor charged with DC power to pass through the detection target power device during a period in which the shut-off circuit shuts off the supply of AC power from the AC power source to the converter in accordance with the command by the shut-off command unit.

Metadata:
- Claim Count in Document: 1.0
- Percentile: 90.0
- Lexical Diversity: 2.37879
- Patent Class: 318.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['10115105', '13885934', '13612975', '14637478', '11148345']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.653721400707643
- 35 USC 102 Novelty (BERT): 0.4934157587734362
- Combined Prediction Score: 0.6376908365142223
- Mean Citation Score: 213.18053
- Max Citation Score: 235.2979
- Similarity Product: 189.34385947823523

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