PATENT CLAIM ANALYSIS

Application Number: 16092847
Application Type: Utility
Filing Date: 2018-10
Publication Date: 2019-07
Patent Classification: ["363", "055000"]

Abstract:
A method for diagnosing a fault in the control of a three-phase electric motor current-mode controlled by a control signal. The method makes it possible to calculate the actual dead time present in each of the three control signals at a given time on the basis of compensated temporal offsets for each phase of the motor, of a predetermined measurement error common to the three phases of the motor and of a value of a amplitude of the current flowing through the transistors of the three pairs of transistors at the given time so as to detect a fault in the control of the motor when the absolute value of the calculated difference is higher than a predetermined detection threshold.

Claim (Index 7):
A device for diagnosing a fault in the control of a three-phase electric motor, each phase of said motor being current-mode controlled by a control signal, said control signal being pulse-width modulated and being generated at the midpoint of an assembly formed by a \u201chigh-stage\u201d transistor connected to the battery of the vehicle and a \u201clow-stage\u201d transistor connected to ground on the basis of a high-stage signal received by the high-stage transistor and a low-stage signal received by the low-stage transistor, the high-stage signal and the low-stage signal being pulse-width modulated signals, which signals are inverted with respect to one another and each high state of the high-stage signal of which is centered on a low state of the low-stage signal, said device comprising:\n a microcontroller configured to generate, for each control signal for controlling a phase of the motor, a high-stage signal and a low-state signal, the start of a high state of the high-state signal being temporally offset by a duration referred to as the \u201cinserted dead time\u201d with respect to the start of the corresponding low state of the low-state signal, \n an amplifier configured to amplify said high-stage and low-stage signals, \n an inverter configured to generate, for each phase of the motor, a control signal on the basis of a pair of amplified high-stage and low-state signals, \n a measurement module configured to measure and to format the generated control signals, \n the microcontroller further being configured:\n to calculate, for each control signal for controlling a phase of the motor, the difference between the duration of a high state of the generated high-stage signal added to the value of the inserted dead time and the duration of the formatted control signal, said difference varying sinusoidally with time, \n to compensate, for each control signal for controlling a phase of the motor, for the calculated difference so that it oscillates about a zero value with time, \n to calculate the actual dead time present in each of the three control signals at a given time on the basis of the compensated temporal offsets for each phase of the motor, of a predetermined measurement error common to the three phases of the motor and of the value of the amplitude of the current flowing through the transistors of the three pairs of transistors at said given time, \n to calculate the difference between the calculated dead time and the inserted dead time, \n to detect a fault in the control of the motor when the absolute value of the calculated difference is higher than a predetermined detection threshold.

Metadata:
- Claim Count in Document: 1.0
- Percentile: 97.0
- Lexical Diversity: 1.89231
- Patent Class: 363.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['16136398', '10715379', '14140922', '15441482', '13589936']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7642780443274029
- 35 USC 102 Novelty (BERT): 0.4660620235984716
- Combined Prediction Score: 0.7344564422545098
- Mean Citation Score: 152.20389799999995
- Max Citation Score: 155.0958
- Similarity Product: 120.72987158796784

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

Dataset: test