| 摘要 |
The invention relates to a power converter comprising: a DC power supply bus comprising a positive power supply line (10) and negative power supply line (11), a limiting resistor (RL) connected in series with the negative power supply line (11) of the DC power supply bus, designed to limit the charging current of the bus capacitor (Cbus), an inverter module comprising upper transistors (T2, T4, T6) and lower transistors (T1, T3, T5) in series of the normally ON field-effect type, several Grid control devices (CT1-CT6) allowing each to apply a Grid voltage to the transistors for controlling each transistor so as to turn off or to turn on, a start-up source (Sd) connected in parallel with the limiting resistor (RL) and to each Grid control device (CT1, CT3, CT5) for the lower transistors (T1, T3, T5) and configured for charging with a negative voltage when the power converter starts up.
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