PATENT CLAIM ANALYSIS

Application Number: 16076732
Application Type: Utility
Filing Date: 2018-08
Publication Date: 2019-02
Patent Classification: ["318", "400020"]

Abstract:
A motor drive that enables the elimination of distortion of a motor current caused by direct current voltage ripples with the use of a smoothing capacitor having a small capacity and refrigeration equipment. A motor drive includes a rectifier circuit, a smoothing capacitor, voltage detector, an inverter circuit, current sensor, and a controller configured to control the inverter circuit. The controller has a voltage controller configured to generate a voltage command value used for controlling the motor, a ripple frequency arithmetic unit configured to operate a ripple frequency included in the direct current voltage signal, and a harmonic suppressor configured to process a signal based on the direct current signal using an S controller having a gain near the ripple frequency and output a corrected amount. The inverter circuit is controlled based on a signal that the voltage command value is corrected using the corrected amount.

Claim (Index 3):
The motor drive device according to  claim 1 ,\n wherein the ripple frequency arithmetic unit calculates a ripple frequency of the direct current voltage signal by extracting a ripple component of the direct current voltage signal, generating a signal having a different frequency component through a multiplication process of a sine wave and a cosine wave of a fixed frequency, and operating a phase through arctangent operation on a difference frequency component between a frequency of the ripple component and the fixed frequency.

Metadata:
- Claim Count in Document: 3.0
- Percentile: 96.0
- Lexical Diversity: 2.27536
- Patent Class: 318.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['15740152', '15102624', '13029742', '13009007', '13563488']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7015928872531628
- 35 USC 102 Novelty (BERT): 0.5051365571809476
- Combined Prediction Score: 0.6819472542459413
- Mean Citation Score: 233.01712000000003
- Max Citation Score: 275.0966
- Similarity Product: 202.8320459276676

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