DRIVE DEVICE FOR SEMICONDUCTOR SWITCHING ELEMENT
PROBLEM TO BE SOLVED: To equalize voltage shares of a plurality of series-connected semiconductor switching elements without feeding back a voltage deviation amount or a potential amount.SOLUTION: A voltage detection circuit 7 detects voltages of two series-connected semiconductor switching elements...
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Format | Patent |
Language | English |
Published |
06.06.2013
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Abstract | PROBLEM TO BE SOLVED: To equalize voltage shares of a plurality of series-connected semiconductor switching elements without feeding back a voltage deviation amount or a potential amount.SOLUTION: A voltage detection circuit 7 detects voltages of two series-connected semiconductor switching elements A, B by reference to a potential of one semiconductor switching element A, and a comparator 10 compares the voltages of the semiconductor switching elements A, B and feeds back a voltage deviation polarity signal. A timing control arithmetic circuit 12 determines a control direction on the basis of the voltage deviation polarity signal at every switching cycle, adds a fixed amount of controlled variable in the determined control direction to a controlled variable to a gate signal for the next switching cycle, and outputs the resultant controlled variable and holds the resultant controlled variable. A timing control circuit 13 adjusts a timing of change in the gate signal on the basis of the controlled variable. |
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AbstractList | PROBLEM TO BE SOLVED: To equalize voltage shares of a plurality of series-connected semiconductor switching elements without feeding back a voltage deviation amount or a potential amount.SOLUTION: A voltage detection circuit 7 detects voltages of two series-connected semiconductor switching elements A, B by reference to a potential of one semiconductor switching element A, and a comparator 10 compares the voltages of the semiconductor switching elements A, B and feeds back a voltage deviation polarity signal. A timing control arithmetic circuit 12 determines a control direction on the basis of the voltage deviation polarity signal at every switching cycle, adds a fixed amount of controlled variable in the determined control direction to a controlled variable to a gate signal for the next switching cycle, and outputs the resultant controlled variable and holds the resultant controlled variable. A timing control circuit 13 adjusts a timing of change in the gate signal on the basis of the controlled variable. |
Author | OGURA KAZUYA URUSHIBATA SHOTA |
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Snippet | PROBLEM TO BE SOLVED: To equalize voltage shares of a plurality of series-connected semiconductor switching elements without feeding back a voltage deviation... |
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SubjectTerms | APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION |
Title | DRIVE DEVICE FOR SEMICONDUCTOR SWITCHING ELEMENT |
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