SEMICONDUCTOR POWER CONVERTER

PROBLEM TO BE SOLVED: To provide a drive circuit for an IGBT(Insulated Gate Bipolar Transistor) that solves a problem of disabled gate control by a large gate current at a high-speed in the case of switching gate resistors by an analog switch. SOLUTION: Analog switches S1-S3 are used to select gate...

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Bibliographic Details
Main Author ICHIHARA AKIFUMI
Format Patent
LanguageEnglish
Published 12.07.2002
Edition7
Subjects
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
BASIC ELECTRONIC CIRCUITRY
CONTROL OR REGULATION THEREOF
CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
GENERATION
PULSE TECHNIQUE
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Summary:PROBLEM TO BE SOLVED: To provide a drive circuit for an IGBT(Insulated Gate Bipolar Transistor) that solves a problem of disabled gate control by a large gate current at a high-speed in the case of switching gate resistors by an analog switch. SOLUTION: Analog switches S1-S3 are used to select gate resistors RG1-RG3, a gate voltage is simulated with the selected gate resistor and a capacitor C1 simulating a gate capacitance, the gate voltage is applied to a current amplifier AMP, where current amplification is conducted and a charging/discharging voltage across a capacitor C2 provides a gate voltage of the IGBT. This method also includes the selection of the capacitors C1 in parallel with the switching of the gate resistors.
Bibliography:Application Number: JP20000391819