Driver circuit for an inverter device with output voltage stabil

Details Driver circuit for an inverter device with output voltage stabil Driver circuit for an inverter device with output voltage stabil

1991-08-07

1993-06-08

Beha, Jr., William H.

Electric power conversion systems

Current conversion

Using semiconductor-type converter

307578, 363 49, H02M 108

Patent

active

052185230

ABSTRACT:
A driver circuit for a half-bridge portion of an inverter device includes a upper arm driver circuit and a lower arm driver circuit for driving a upper arm IGBT and a lower arm IGBT, respectively. The lower arm driver circuit is supplied from a lower arm driver voltage source, while the upper arm driver circuit is supplied from a capacitor, which is charged by the lower arm driver voltage source via a diode and the lower arm IGBT when the lower arm IGBT is turned on. A current limiter is coupled in series with the capacitor to limit the magnitude of the initial charging current of the capacitor while the charge stored across the capacitor is null or small, such that the voltage controller for the lower arm driver voltage source is not disturbed. Alternatively, a pulse generator is provided to generate pulses which repeatedly turn on and off the lower arm driver circuit before the upper arm driver circuit and the lower arm driver circuit are driven complimentarily. In such case, the ON/OFF ratio of the pulses is preferred to increase gradually toward the completion of the initial charging of the capacitor.

REFERENCES:
patent: 3349313 (1967-10-01), Wilmarth
patent: 3555398 (1971-01-01), Nestorovic
patent: 4316243 (1982-02-01), Archer
patent: 4599555 (1986-07-01), Damiano et al.
patent: 4994955 (1991-02-01), Schoofs et al.
Young, "High-Speed, High-Voltage IC Driver for HEXFET or IGBT Bridge Circuits", International Rectifier Power MOSFET Application Notes, AN-978, pp. 1-8, 1988.

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