Semiconductor switch including a pre-driver with a capacitively

Details Semiconductor switch including a pre-driver with a capacitively Semiconductor switch including a pre-driver with a capacitively

1996-02-06

1997-11-11

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

327110, 327423, H03B 100

Patent

active

056868596

ABSTRACT:
When an IGBT element (9) is turned off and an IGBT element (19) is turned on, capacitors (1, 2) are charged by a current successively passing through the capacitor (1), a resistive element (4), a diode (5), the capacitor (2) and an intermediate wire (32) from a high-potential dc bus (30). At the same time, a capacitor (11) is discharged by a current successively passing through a diode (17), a resistive element (16) and the capacitor (11) from a low-potential dc bus (31) to flow to the intermediate wire (32). When the IGBT element (9) is turned on and the IGBT element (19) is turned off, on the other hand, the capacitors (11, 12) are charged and the capacitor (1) is discharged. The above is so repeated as to maintain source voltages of driving circuits (8, 18) at values exceeding constant levels. Thus, a power circuit for a driving circuit is formed by a simple circuit element.

REFERENCES:
patent: 5055721 (1991-10-01), Majumdar et al.
patent: 5543740 (1996-08-01), Wong

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