| 摘要 |
PURPOSE: A circuit for regulating an initial power source of a power device driving device of a boot strap type is provided to improve the reliability of the operation of the circuit by preventing a high side capacitor and a lower side capacitor for driving a driving IC from being charged before the DC link voltage is supplied to a DC link capacitor. CONSTITUTION: First and third switches(S1,S3) have parallel diodes(D1,D3). Second and fourth switches(S2,S4) have parallel diodes(D2,D[) and is connected to the first and third switches(S1,S3) in parallel. A DC link capacitor(Cdc) is connected to the second and fourth switches(S2,S4) in parallel. A load coil(Lp) is connected to the common contact point of the first and third switches(S1,S3) and to the common contact point of the second and fourth switches(S2,S4). The circuit for regulating an initial power source of a power device driving device of a boot strap type comprises a high side capacitor(Vf), a low side capacitor, a Zener diode, and resistances.
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