PATENT CLAIM ANALYSIS

Application Number: 16180231
Application Type: Utility
Filing Date: 2018-11
Publication Date: 2019-03
Patent Classification: ["363", "041000"]

Abstract:
A control method of an inverter for outputting polyphase alternate-current electrical power is provided. In the control method, modified PWM pulses of respective phases for controlling semiconductor switching elements of the inverter are generated, based on an output of a counter common to the respective phases. Each of the modified PWM pulses is configured such that a total pulse width, in a period corresponding to one or more cycles of a carrier, is substantially equal to a total pulse width of an assumed PWM pulse which is obtained by comparing, with the carrier, a time average value of an output voltage of the corresponding phase in the period. Further, at least one of a generation timing and a generation frequency of at least one of the modified PWM pulses is changed from the assumed PWM pulse.

Claim (Index 1):
A method of controlling an inverter including a plurality of series circuits, each of the series circuits being formed by two semiconductor switching elements being connected in series, a connection point between the two semiconductor switching elements being used as one of output terminals of polyphase alternate-current (AC) electrical power, the series circuits being connected in parallel with each other with respect to a capacitor connected in parallel with a direct-current (DC) voltage source, the method for controlling the semiconductor switching elements by using PWM pulses obtained by comparing output voltage command values of respective phases with a carrier comprising:\n generating modified PWM pulses of respective phases based on an output of a counter common to the respective phases; and controlling the semiconductor switching elements by using the modified PWM pulses, wherein\n each of the modified PWM pulses is configured such that a total pulse width, in a period corresponding to one or more cycles of the carrier, is substantially equal to a total pulse width of an assumed PWM pulse of a corresponding phase among the respective phases, the assumed PWM pulse being obtained by comparing, with the carrier, a time average value of an output voltage of the corresponding phase in the period, and \n at least one of a generation timing and a generation frequency of at least one of the modified PWM pulses is changed from the assumed PWM pulse, exceeding a necessary extent for control.

Metadata:
- Claim Count in Document: 17.0
- Percentile: 98.0
- Lexical Diversity: 2.0137
- Patent Class: 363.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['12991630', '16164920', '15956178', '15041413', '12596534']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8291409495729758
- 35 USC 102 Novelty (BERT): 0.5010348514488142
- Combined Prediction Score: 0.7963303397605597
- Mean Citation Score: 273.498192
- Max Citation Score: 284.64352
- Similarity Product: 218.0534026431656

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

Dataset: test