PATENT CLAIM ANALYSIS

Application Number: 16278393
Application Type: Utility
Filing Date: 2019-02
Publication Date: 2019-06
Patent Classification: ["318", "466000"]

Abstract:
An apparatus for detecting a position of a rotor of a DC motor with N phases having a plurality of windings. The apparatus includes circuitry to couple at least two of the windings between a supply voltage and a reference voltage according to a first current path and allow the current stored in the two windings to be discharged through a second current path. The circuitry is configured to force the at least two windings at a short circuit condition in the second current path. The apparatus also includes a measurement circuit configured to measure the time period of discharging the current stored in the two windings and a rotor position detector for detecting the rotor position based on the measured time period.

Claim (Index 1):
A device comprising:\n a first half-bridge having a first supply terminal configured to be coupled to a power supply, a second supply terminal configured coupled to a reference node, and an output terminal configured to be coupled to a first terminal of an electric motor having a rotor and a plurality of windings; a second half-bridge having a first supply terminal configured to be coupled to the power supply, a second supply terminal coupled to the reference node, and an output terminal configured to be coupled to a second terminal of the electric motor; a first current sense element coupled between the second supply terminal of the first half-bridge and the reference node; a second current sense element coupled between the second supply terminal of the second half-bridge and the reference node; a comparator having a first input configured to receive a value corresponding to a reference current; a multiplexer having a plurality of inputs comprising a first input coupled to the first current sense element, and a second input coupled to the second current sense element, the multiplexer further comprising an output coupled to a second input of the comparator; and a controller coupled to an output of the comparator, the controller configured to:\n drive the first half-bridge and the second half-bridge using pulse width modulation during charging of a first current that passes through two windings of the plurality of windings via a first current path, \n discharge the first current stored in the two windings via a second current path, \n determine a time constant associated with two of the plurality of windings by measuring a time between a peak value of the first current and a second value of the first current, and \n detect a rotor position of the rotor based on the determined time constant.

Metadata:
- Claim Count in Document: 7.0
- Percentile: 99.0
- Lexical Diversity: 2.18966
- Patent Class: 318.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14641956', '15277684', '13242847', '14183642', '10285362']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6549044290809704
- 35 USC 102 Novelty (BERT): 0.5771723425161007
- Combined Prediction Score: 0.6471312204244835
- Mean Citation Score: 332.565894
- Max Citation Score: 492.7994
- Similarity Product: 381.0968992828368

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