PATENT CLAIM ANALYSIS

Application Number: 15896996
Application Type: Utility
Filing Date: 2018-02
Publication Date: 2018-08
Patent Classification: ["318", "400020"]

Abstract:
A system for detecting and eliminating harmonic effects in the DQ plane of the non-sinusoidal back EMF voltages is provided. The system is a field oriented controller (FOC) that includes a poly-phase electric machine, proportional-integral-derivative controllers and a microcontroller. The microcontroller not only analyzes a stator current but analyzes a back electromotive force (BEMF) voltages to extract flux vectors of the EMF. These vectors have distortions as a result of the geometries and saturation effects inherent in the electrical machine. Therefore, the microcontroller corrects these defects by transmitting the BEMF vectors and the machine operating points, including the current rotational speed and current, into the algorithm, which in turn develops a command voltage in the DQ frame for the specific operating point. This command voltage is inserted into the control output of the current PI controller so to prevents the non-sinusoidal back EMF voltages from generating non-sinusoidal currents.

Claim (Index 17):
A method for correcting harmonics in an electrical machine, the method comprising:\n analyzing, by a microcontroller, a stator current and a back electromotive force voltages; extracting a pair of flux vectors of a back electromotive force indicating the rotation of the electrical machine and the machine speed; determining the distortions from the geometries and saturation effects; transmitting, by the microcontroller, the pair of flux vectors of the back electromotive force into a correcting algorithm; developing a command voltage in a DQ frame that correlates to the pair of flux vectors of the back electromotive force; and inserting the command voltage, by the microcontroller, into a control output of a current proportional-integral-derivative controller as a correction signal, wherein the correction signal prevents the back electromotive force voltages from generating a non-sinusoidal current over the operating range of the machine thereby maintaining the controlling quantities for a proportional-integral-derivative controller loops in the DQ plane as DC values.

Metadata:
- Claim Count in Document: 7.0
- Percentile: 88.0
- Lexical Diversity: 1.81111
- Patent Class: 318.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['13345789', '15461599', '13948330', '14541177', '13914341']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6658049117643134
- 35 USC 102 Novelty (BERT): 0.4758656591414008
- Combined Prediction Score: 0.6468109865020223
- Mean Citation Score: 198.655148
- Max Citation Score: 206.58047
- Similarity Product: 163.36199593295512

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