PATENT CLAIM ANALYSIS

Application Number: 15969461
Application Type: Utility
Filing Date: 2018-05
Publication Date: 2018-11
Patent Classification: ["318", "400110"]

Abstract:
An oil-pump motor drive apparatus includes a current detection unit for detecting each of multi-phase currents flowing through coils of a stator, a control unit for converting the detected multi-phase currents into a d-axis current Id and a q-axis current Iq, calculating a phase error between an actual rotational position of the rotor and an imaginary rotational position by comparing the d-axis current Id with a d-axis current command value Idref and comparing the q-axis current Iq with the d-axis current command value Idref, performing control so that the phase error gets closer to zero, and outputting voltage command values indicating voltages to be applied to respective phases of the brushless motor, to a motor drive circuit, in which the control unit sets the d-axis current command value Idref to a value larger than zero when the number of revolutions of the motor is smaller than a predetermined number.

Claim (Index 1):
A drive apparatus for an oil-pump motor comprising:\n a current detection unit configured to detect, when an oil-pump brushless motor comprising a stator and a rotor is rotating, each of multi-phase currents flowing through coils of the stator; a control unit configured to convert the detected multi-phase currents into a d-axis current Id and a q-axis current Iq in a d-q coordinate system, calculate a phase error between an actual rotational position of the rotor and an imaginary rotational position thereof by comparing the d-axis current Id with a d-axis current command value Idref and comparing the q-axis current Iq with the d-axis current command value Idref, perform control so that the phase error gets closer to zero, and output voltage command values to a motor drive circuit, the d-q coordinate system including a d-axis parallel to a direction of a magnetic flux generated by a magnet of the rotor and a q-axis orthogonal to the d-axis and being defined so as to rotate together with the rotor, the voltage command values indicating voltages to be applied to respective phases of the brushless motor, wherein the control unit sets the d-axis current command value Idref to a value larger than zero when the number of revolutions of the brushless motor is smaller than a predetermined number of revolutions.

Metadata:
- Claim Count in Document: 26.0
- Percentile: 93.0
- Lexical Diversity: 2.02597
- Patent Class: 318.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['12423393', '12935774', '11860873', '11717636', '11908887']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.695242581759412
- 35 USC 102 Novelty (BERT): 0.5018283684701181
- Combined Prediction Score: 0.6759011604304827
- Mean Citation Score: 271.77245
- Max Citation Score: 283.4716200000001
- Similarity Product: 220.78366761663085

Labels:
- Claim Label 101: 1
- Claim Label 102: 0
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 0
- Label 101 Adjusted: 1

Dataset: test