PATENT CLAIM ANALYSIS

Application Number: 16065836
Application Type: Utility
Filing Date: 2018-06
Publication Date: 2018-12
Patent Classification: ["318", "400020"]

Abstract:
The present invention relates to a method and apparatus for on-line estimation of an initial position of a surface permanent magnet electric machine in a stationary state or at a first speed. The method ( 100 ) for on-line estimation of an initial position of a surface permanent magnet electric machine in a stationary state or at a first speed comprises: injecting a high-frequency pulsating voltage signal; acquiring a d-axis high-frequency current signal responding to the high-frequency pulsating voltage signal; and estimating an initial position of the surface permanent magnet electric machine on the basis of a second harmonic of the d-axis high-frequency current signal. According to the present invention, the apparatus ( 200 ) for on-line estimation of an initial position of a surface permanent magnet electric machine in a stationary state or at a first is speed is also provided, the apparatus comprising a voltage injection unit configured to inject a high-frequency pulsating voltage signal, a current acquisition unit configured to acquire a d-axis high-frequency current signal responding to the high-frequency pulsating voltage signal, and an analysis unit configured to analyse a second harmonic of the d-axis high-frequency current signal so as to estimate an initial position of the surface permanent magnet electric machine.

Claim (Index 1):
A method ( 100 ) for on-line estimation of an initial position of a surface permanent magnet electric machine in a stationary state or at a first speed, the method ( 100 ) comprising:\n injecting ( 110 ) a high-frequency pulsating voltage signal; acquiring ( 120 ) a d-axis high-frequency current signal responding to the high-frequency pulsating voltage signal; and estimating ( 130 ) an initial position of the surface permanent magnet electric machine on the basis of a second harmonic of the d-axis high-frequency current signal.

Metadata:
- Claim Count in Document: 9.0
- Percentile: 94.0
- Lexical Diversity: 3.17647
- Patent Class: 318.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['14761884', '15801866', '15528751', '14261402', '15855646']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6516120017425185
- 35 USC 102 Novelty (BERT): 0.511963309365762
- Combined Prediction Score: 0.6376471325048428
- Mean Citation Score: 265.2855860000001
- Max Citation Score: 274.96265
- Similarity Product: 192.73943629493712

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