PATENT CLAIM ANALYSIS

Application Number: 15914630
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2018-09
Patent Classification: ["363", "071000"]

Abstract:
A circuit according to an embodiment includes a circuit configured to, for each of values of output currents output from power conversion devices connected in parallel to one another and driven based on common ON signals applied to the power conversion devices, output a difference between the output current value and a reference value when a polarity of the output current value is positive, and output a difference between an absolute value of the output current value and an absolute value of the reference value when the polarity of the output current value is negative; and a circuit configured to output adjustment time signals each of which indicates an amount of a delay time of a rising timing or a falling timing of the ON signal, according to an output value of the output current difference calculation circuit.

Claim (Index 6):
A power conversion system comprising:\n a control device including the current balance adjustment circuit according to  claim 1  and configured to provide the ON signals and the adjustment time signals to the plurality of power conversion devices; and the plurality of power conversion devices, wherein AC output terminals of the plurality of power conversion devices are connected in parallel to one another, each of the power conversion devices comprises: a three-level conversion circuit in which a first switching device and a fourth switching device having diodes connected in anti-parallel are sequentially connected in series from a positive electrode toward a negative electrode of a DC power source having the positive electrode, the negative electrode, and a neutral electrode, an AC output terminal is taken out from a connection point between the first switching device and the fourth switching device, and a second switching device in a direction from the neutral electrode toward the connection point and a third switching device in a direction from the connection point toward the neutral electrode are connected in series and inserted between the connection point and the neutral electrode of the DC power source; a current detection circuit configured to detect AC output currents of the power conversion devices; and a delay circuit configured to receive the adjustment time signals and the ON signals each of which instructs ON and OFF of each of the first to fourth switching devices of the plurality of power conversion devices, and delay each of an ON timing and an OFF timing of each of the ON signals based on the adjustment time signals, the control device is configured to generate the ON signals each of which controls an AC output current by PWM control to perform exclusive switching between the first switching device and the third switching device or between the second switching device and the fourth switching device, in a period during which the PWM control is performed between the first switching device and the third switching device, the control device is configured to receive an AC output current value after the first switching device and the third switching device of the plurality of power conversion devices are turned on and an AC output current value after turned off, when a polarity of a detected current value at the time of ON is positive and the detected current value at the time of ON is greater than the reference value at the time of ON, the control device is configured to generate a signal which increases a delay time of a next ON timing of the first switching device of the power conversion device, when the polarity of the detected current value at the time of ON is positive and the detected current value at the time of ON is less than the reference value at the time of ON, the control device is configured to generate a signal which decreases a delay time of a next ON timing of the first switching device of the power conversion device, when a polarity of a detected current value at the time of OFF is positive and the detected current value at the time of OFF is greater than the reference value at the time of OFF, the control device is configured to generate a signal which decreases a delay time of a next OFF timing of the first switching device of the power conversion device, when the polarity of the detected current value at the time of OFF is positive and the detected current value at the time of OFF is less than the reference value at the time of OFF, the control device is configured to generate a signal which increases a delay time of a next OFF timing of the first switching device of the power conversion device, when the polarity of the detected current value at the time of ON is negative and an absolute value of the detected current value at the time of ON is greater than an absolute value of the reference value at the time of ON, the control device is configured to generate a signal which increases a delay time of a next ON timing of the third switching device of the power conversion device, when the polarity of the detected current value at the time of ON is negative and the absolute value of the detected current value at the time of ON is less than the absolute value of the reference value at the time of ON, the control device is configured to generate a signal which decreases a delay time of a next ON timing of the third switching device of the power conversion device, when the polarity of the detected current value at the time of OFF is negative and an absolute value of the detected current value at the time of OFF is greater than an absolute value of the reference value at the time of OFF, the control device is configured to generate a signal which decreases a delay time of a next OFF timing of the third switching device of the power conversion device, when the polarity of the detected current value at the time of OFF is negative and the absolute value of the detected current value at the time of OFF is less than the absolute value of the reference value at the time of OFF, the control device is configured to generate a signal which increases a delay time of a next OFF timing of the third switching device of the power conversion device, in a period during which the PWM control is performed between the second switching device and the fourth switching device, the control device is configured to receive an AC output current value after the second switching device and the fourth switching device of the plurality of power conversion devices are turned on and an AC output current value after turned off, when the polarity of the detected current value at the time of ON is positive and the detected current value at the time of ON is greater than the reference value at the time of ON, the control device is configured to generate a signal which increases a delay time of a next ON timing of the second switching device of the power conversion device, when the polarity of the detected current value at the time of ON is positive and the detected current value at the time of ON is less than the reference value at the time of ON, the control device is configured to generate a signal which decreases a delay time of a next ON timing of the second switching device of the power conversion device, when the polarity of the detected current value at the time of OFF is positive and the detected current value at the time of OFF is greater than the reference value at the time of OFF, the control device is configured to generate a signal which decreases a delay time of a next OFF timing of the second switching device of the power conversion device, when the polarity of the detected current value at the time of OFF is positive and the detected current value at the time of OFF is less than the reference value at the time of OFF, the control device is configured to generate a signal which increases a delay time of a next OFF timing of the second switching device of the power conversion device, when the polarity of the detected current value at the time of ON is negative and an absolute value of the detected current value at the time of ON is greater than an absolute value of the reference value at the time of ON, the control device is configured to generate a signal which increases a delay time of a next ON timing of the fourth switching device of the power conversion device, when the polarity of the detected current value at the time of ON is negative and the absolute value of the detected current value at the time of ON is less than the absolute value of the reference value at the time of ON, the control device is configured to generate a signal which decreases a delay time of a next ON timing of the fourth switching device of the power conversion device, when the polarity of the detected current value at the time of OFF is negative and an absolute value of the detected current value at the time of OFF is greater than an absolute value of the reference value at the time of OFF, the control device is configured to generate a signal which decreases a delay time of a next OFF timing of the fourth switching device of the power conversion device, and when the polarity of the detected current value at the time of OFF is negative and the absolute value of the detected current value at the time of OFF is less than the absolute value of the reference value at the time of OFF, the control device is configured to generate a signal which increases a delay time of a next OFF timing of the fourth switching device of the power conversion device.

Metadata:
- Claim Count in Document: 7.0
- Percentile: 90.0
- Lexical Diversity: 2.44068
- Patent Class: 363.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['13832998', '14901317', '12881624', '12440934', '15763325']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8015488606763389
- 35 USC 102 Novelty (BERT): 0.475945424841559
- Combined Prediction Score: 0.768988517092861
- Mean Citation Score: 173.44903399999995
- Max Citation Score: 183.48312
- Similarity Product: 132.96373792831423

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