PATENT CLAIM ANALYSIS

Application Number: 16074684
Application Type: Utility
Filing Date: 2018-08
Publication Date: 2019-02
Patent Classification: ["318", "400020"]

Abstract:
In a motor control device, a two-phase/three-phase converter is configured to convert a d-axis voltage instruction and a q-axis voltage instruction into voltage instructions in UVW phases. A PWM circuit is configured to generate drive pulse signals having undergone power width modulation, in accordance with the voltage instructions. An inverter is configured to generate drive voltages for driving coils based on the drive pulse signals. A position detector is configured to detect a rotational position. A rotational speed calculator is configured to calculate a rotational speed. A current detector is configured to detect drive currents flowing into the coils. A three-phase/two-phase converter is configured to convert detected drive current values into a d-axis current value and a q-axis current value. A d-axis voltage instruction generation unit is configured to acquire a difference between the d-axis current value and a d-axis current instruction having a predetermined value, and to generate the d-axis voltage instruction based on PI computation performed on the difference. A q-axis voltage instruction generation unit is configured to acquire a difference between a speed instruction and the rotational speed calculated by a rotational speed calculation unit, and to generate the q-axis voltage instruction based on PI computation performed on the difference.

Claim (Index 1):
A motor control device configured to perform a rotation control on a motor including a stator including coils in three, UVW phases of a U phase, a V phase, and a W phase, and a rotor rotatably disposed so as to face the stator, the rotor holding permanent magnets, by utilizing a dq-axis coordinate system including a d-axis corresponding to a magnetic pole position direction of the permanent magnets and a q-axis orthogonal to the d-axis, the motor control device comprising:\n a two-phase/three-phase converter configured to receive a d-axis voltage instruction and a q-axis voltage instruction as voltage instruction values on the dq-axis coordinate, at which voltages are to be applied to the coils, and to convert the d-axis voltage instruction and the q-axis voltage instruction into drive voltage instructions in the UVW phases; a power width modulation (PWM) circuit configured to generate drive pulse signals in the UVW phases, the drive pulse signals being undergone pulse width modulation per phase, in accordance with the supplied drive voltage instructions in the UVW phases; an inverter configured to generate drive voltages in the UVW phases for driving the coils per phase based on the supplied drive pulse signals in the UVW phases; a position detector configured to detect a rotational position of the rotor; a rotational speed calculator configured to calculate a rotational speed of the rotor; a current detector configured to detect drive currents flowing into the coils in the UVW phases; a three-phase/two-phase converter configured to convert current values of the drive currents in the UVW phases, the drive currents being detected by the current detector, into a d-axis current value and a q-axis current value on the dq-axis coordinate; a d-axis voltage instruction generation unit configured to generate the d-axis voltage instruction; and a q-axis voltage instruction generation unit configured to generate the q-axis voltage instruction, wherein the d-axis voltage instruction generation unit is further configured to acquire a difference between the d-axis current value and a d-axis current instruction having a predetermined value, and to generate the d-axis voltage instruction based on proportional integral (PI) computation performed on the difference, and wherein the q-axis voltage instruction generation unit is further configured to acquire a difference between a supplied speed instruction and the rotational speed calculated by the rotational speed calculator, and to generate the q-axis voltage instruction based on PI computation performed on the difference.

Metadata:
- Claim Count in Document: 7.0
- Percentile: 96.0
- Lexical Diversity: 3.0
- Patent Class: 318.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15969461', '10784964', '11704971', '12296661', '10809530']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6906996416688113
- 35 USC 102 Novelty (BERT): 0.4841270828679632
- Combined Prediction Score: 0.6700423857887264
- Mean Citation Score: 255.064386
- Max Citation Score: 257.9095
- Similarity Product: 228.461954741776

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