| 摘要 |
A small and highly-efficient gate-power-supply device that has high insulating property and that can stabilize voltage to be applied to gate drivers. A gate-power-supply device (1) provided with an inverter circuit (3), a transformer, and rectifier circuits (7) includes: secondary-side parallel capacitors (C P ) connected in parallel to secondary-side coils (5) of the transformer and for cancelling inductance components of the secondary-side coils (5) at the drive frequency f 0 of the inverter circuit (3); and a primary-side series capacitor (C S ) connected in series to a primary-side coil (4) of the transformer, and for cancelling the imaginary term (inductance component) of the combined impedance of the gate drivers (8), the rectifier circuits (7), the secondary-side parallel capacitors (C P ), the secondary-side coils (5), transformer cores (6) and the primary-side coil (4), which are a load viewed from the inverter circuit (3). |
