PATENT CLAIM ANALYSIS

Application Number: 15970028
Application Type: Utility
Filing Date: 2018-05
Publication Date: 2018-09
Patent Classification: ["318", "400020"]

Abstract:
Systems and methods for controlling a permanent magnet synchronous motor to eliminate the need to filter a PWM output of the motor's drive system. In one embodiment, the motor's drive transforms measured output currents to a d-q reference frame and uses these to determine demanded Vd and Vq voltages. An inverter angle is determined from the difference between the demanded Vd and Vq voltages. A demanded bus voltage is determined as the square root of the sum of the square of the demanded Vq and the demanded Vd, multiplied by 2/pi. An inverter angle is determined as the arctangent of (−demanded Vd/demanded Vq). The demanded and actual bus voltages are used to determine a firing angle for the converter. The controller uses this information to generate a six-step waveform that can be provided to the motor without requiring output filtering.

Claim (Index 10):
An electric drive system comprising:\n a converter; an inverter; a DC bus coupled between the converter and the inverter, wherein the DC bus receives DC power from the converter and provides the DC power to the inverter; and a controller coupled to the converter and the inverter; wherein the controller:\n receives measurements of currents output from the inverter, \n transforms the measured output currents to Id and Iq currents in a d-q reference frame, \n determines a demanded Vd voltage in dependence on a difference between the Id current and the Id reference value, \n determines a demanded Vq voltage in dependence on a difference between the Iq current and the Iq reference value, \n determines an inverter angle in dependence on the demanded Vd voltage and the demanded Vq voltage, \n determines a demanded bus voltage in dependence on the demanded Vd voltage and the demanded Vq voltage, \n determines a converter firing angle in dependence on a difference between the demanded bus voltage and a measured bus voltage, \n controls the converter of the electric drive in dependence on the converter firing angle and thereby controlling the demanded bus voltage on the DC bus, and \n operates the inverter in dependence on the inverter angle and thereby controls the inverter to output a six-step output waveform.

Metadata:
- Claim Count in Document: 2.0
- Percentile: 93.0
- Lexical Diversity: 1.88889
- Patent Class: 318.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15281388', '10052738', '12744244', '13962570', '16074684']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6298950616115607
- 35 USC 102 Novelty (BERT): 0.5967283541730936
- Combined Prediction Score: 0.626578390867714
- Mean Citation Score: 296.070264
- Max Citation Score: 492.33646
- Similarity Product: 484.5236208636047

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

Dataset: test