PATENT CLAIM ANALYSIS

Application Number: 16083853
Application Type: Utility
Filing Date: 2018-09
Publication Date: 2019-02
Patent Classification: ["318", "400200"]

Abstract:
The present invention relates to a motor driving device and a method for measuring a phase current in a motor driving device, and specifically relates to a technique of measuring three phase currents of a three-phase brushless motor using a current sensor for measuring the DC bus current in the inverter. The control unit according to the present invention shifts a pulse phase of a PWM pulse such that pulse phases of the three phase PWM pulses in a first PWM cycle of the PWM control differ from those in a second PWM cycle of the PWM control, and measures the three phase currents from the output of the current sensor in these two first and second PWM cycles. The control unit calculates an offset error of the current sensor from these three phase current measurements and learns a correction value used for performing offset correction on the electric-current measurement.

Claim (Index 3):
The motor driving device according to  claim 2 , wherein the first sensing means performs pulse shifting to delay a pulse phase of a PWM pulse in the first PWM cycle, and performs pulse shifting to advance a pulse phase of a PWM pulse in the second PWM cycle.

Metadata:
- Claim Count in Document: 11.0
- Percentile: 97.0
- Lexical Diversity: 2.38462
- Patent Class: 318.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['11125875', '13127613', '14302228', '12435703', '10761482']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7159781845114099
- 35 USC 102 Novelty (BERT): 0.5130398630836369
- Combined Prediction Score: 0.6956843523686327
- Mean Citation Score: 271.318248
- Max Citation Score: 291.33185
- Similarity Product: 198.2350967918545

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