PATENT CLAIM ANALYSIS

Application Number: 15899647
Application Type: Utility
Filing Date: 2018-02
Publication Date: 2018-06
Patent Classification: ["361", "154000"]

Abstract:
An operation coil drive device includes a drive control unit to perform control to set, for a semiconductor switching element to switch on and off the source voltage applied to an operation coil of a magnetic contactor, a larger ON/OFF time ratio for a circuit-closing control and a smaller ON/OFF time ratio for a holding control, wherein the drive control unit includes: a circuit-closing-control inductance calculation unit to calculate an inductance of the operation coil immediately after a start of the circuit-closing control; a circuit-closing-control resistance value calculation unit to calculate a direct current resistance value of the operation coil based on the calculation result; and a circuit-closing-control switching correction unit to correct the ON/OFF time ratio of the semiconductor switching element for the circuit-closing control based on the calculation result.

Claim (Index 1):
An operation coil drive device for a magnetic contactor, the device comprising:\n a magnetic contactor configured to apply by switching control a source voltage to an operation coil wound around a fixed iron core to attract a movable iron core; a current detection unit configured to detect a current allowed to pass by the switching control through the operation coil; a coil voltage detection unit configured to detect a voltage across the operation coil during the switching control; and a drive control unit configured to perform control to set, for a semiconductor switching element to switch on and off the source voltage applied to the operation coil, a larger ON/OFF time ratio for a circuit-closing control and a smaller ON/OFF time ratio for a holding control, wherein the drive control unit includes:\n a circuit-closing-control inductance calculation unit configured to calculate an inductance of the operation coil at a sampling timing of a coil current passing through the operation coil immediately after a start of the circuit-closing control; \n a circuit-closing-control resistance value calculation unit configured to calculate a direct current resistance value of the operation coil based on a result of calculation by the circuit-closing-control inductance calculation unit; and \n a circuit-closing-control switching correction unit configured to correct the ON/OFF time ratio of the semiconductor switching element for the circuit-closing control based on a result of calculation by the circuit-closing-control resistance value calculation unit.

Metadata:
- Claim Count in Document: 1.0
- Percentile: 88.0
- Lexical Diversity: 2.50909
- Patent Class: 361.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15412002', '10575464', '14368197', '13978088', '15033368']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8089727399920454
- 35 USC 102 Novelty (BERT): 0.4657803694413573
- Combined Prediction Score: 0.7746535029369767
- Mean Citation Score: 196.418042
- Max Citation Score: 202.68536
- Similarity Product: 180.32291801225665

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