Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1986-12-30
1988-04-26
Zazworsky, John
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307573, 307633, H03K 1704, H03K 1756, H03K 17687, H03K 1772
Patent
active
047407220
ABSTRACT:
A semiconductor switching device for use with a power source and a load, including a bipolar device including a channel between a first terminal and a second terminal, in cascade with a field effect device including a channel between a first terminal and a second terminal. There is provided means for selectively applying a switching signal to the control terminal of the field effect device to set the channel of the field effect device in a conductive state or a non-conductive state. A capacitor is electrically connected between the control terminal of the bipolar device and a terminal of the field effect device to supply a driving current to the control terminal of the bipolar device when the channel of the field effect device is switched to the conductive state. The control terminal of the bipolar device supplies a charging current to the capacitor when the channel of the field effect device is switched to a non-conductive state. Owing to this simple arrangement, the driving power to the bipolar device is sufficient because of the current from the main circuit and the commutation current from the bipolar device upon turning off of the bipolar device. No special driving power source is required. The saturation voltage of the bipolar device can be reduced, and the power loss in the main circuit can be reduced in comparison with a conventional circuit.
REFERENCES:
patent: 4360744 (1982-11-01), Taylor
patent: 4581542 (1986-04-01), Steigerwald
Fuji Electric & Co., Ltd.
Zazworsky John
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