| 摘要 |
PROBLEM TO BE SOLVED: To provide a small power converter of a simple structure which employs a self-extinguishing switching element provided with a circuit for self supplying gate driving power stably. SOLUTION: A snubber resistor 41 is connected in series with a power supply voltage dividing resistor 42, which is connected in parallel with a power supply diode 5 and a power supply capacitor 6, and power is supplied to a gate drive circuit 11 via a smoothing circuit 8 comprising a resistor 81 and a capacitor 82. Gate drive power is also supplied from an initial charging resistor 7, when all switching elements are turned off before operating a converter thus realizing a relatively small power converter of simple structure employing a self- extinguishing switching element, where gate drive power can be stabilized through use of snubber energy. |
