GATE DRIVE APPARATUS FOR DRIVING A PLURALITY OF SWITCHING ELEMENTS CONNECTED IN PARALLEL TO EACH OTHER
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United States of America Patent
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Issued Date -
Sep 19, 2019
app pub date -
May 31, 2019
filing date -
Jun 7, 2017
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Abstract
A gate drive apparatus including a switching time measurement unit that calculates a first or second delay time that is between a time at which a rising edge or a falling edge of a gate voltage is applied to the gate terminal of a switching element and a time at which the switching element is turned on or off. The gate drive apparatus further includes first and second time difference calculation units that respectively calculate first and second time differences, first and second pulse generation units that respectively generate first and second pulses having pulse widths that respectively match the first and second time differences, and first and second auxiliary switches that are configured to, upon receiving a first pulse or a second pulse, supply a source current to the gate terminal that corresponds to the first pulse, or absorb a sink current from the gate terminal that corresponds to the second pulse.
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