PATENT CLAIM ANALYSIS

Application Number: 15900937
Application Type: Utility
Filing Date: 2018-02
Publication Date: 2018-10
Patent Classification: ["318", "400130"]

Abstract:
An initial position determination process and a rotation driving process are both attained. A motor includes a rotor having a permanent magnet with a plurality of magnetic poles and a stator having coils with a plurality of phases. A voltage signal generation part generates a voltage signal corresponding to an electric current flowing through each of the coils with the phases of the stator. A filter part includes a first filter and a second filter. The voltage signal is inputted to a comparator through the filter part. A control part controls such that the first filter whose filter constant is larger is selected when performing the initial position determination process of the rotor and the second filter whose filter constant is smaller is selected when performing the rotation driving process.

Claim (Index 1):
A motor driving device, comprising:\n an inverter circuit coupled to each of coils with a plurality of phases of a brushless DC motor including a rotor having a permanent magnet with a plurality of poles and a stator having the coils with the phases; an electrical conduction control part which controls electrical conduction to each of the coils with the phases through the inverter circuit; voltage signal generation parts each of which includes a plurality of resistors coupled to the coils with the phases and generates a voltage signal corresponding to an electric current flowing the coils; a filter part including a first filter and a second filter whose filter constant is smaller than that of the first filter; a filter selection part which selects one of the first filter and the second filter; a comparator which compares the voltage signal inputted through the filter selected by the filter selection part with a predetermined reference voltage; and a control part which performs an initial position determination process for determining the initial position of the rotor and a rotation driving process for rotating the rotor with use of a comparison result in the comparator, wherein the control part controls the filter selection part to select the first filter when performing the initial position determination process and controls the filter selection part to select the second filter when performing the rotation driving process.

Metadata:
- Claim Count in Document: 1.0
- Percentile: 88.0
- Lexical Diversity: 2.26667
- Patent Class: 318.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14797103', '12594064', '12593845', '10684380', '11881243']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6226121139132017
- 35 USC 102 Novelty (BERT): 0.4768309210344733
- Combined Prediction Score: 0.6080339946253289
- Mean Citation Score: 193.752872
- Max Citation Score: 200.91011
- Similarity Product: 165.23513938696922

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