Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific current responsive fault sensor
Patent
1990-02-07
1992-06-09
Stephan, Steven L.
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific current responsive fault sensor
363 56, H03K 1760, H02H 904
Patent
active
051212838
ABSTRACT:
This specification discloses an overcurrent protective circuit for detecting an overcurrent flowing through an electrostatic self-turn-off device and suppressing the overcurrent.
The overcurrent protective circuit according to the present invention comprises a power source for supplying a driving voltage to the electrostatic self-turn-off device to turn on the device, a switching circuit for performing on-off control of the driving voltage to provide a driving signal to the self-turn-off device, and a circuit for detecting the voltage of the driving control terminal and holding the potential of the driving control terminal below the driving voltage in response to the detected voltage reaching a predetermined value.
REFERENCES:
patent: 4404473 (1983-09-01), Fox
patent: 4428015 (1984-01-01), Nesler
patent: 4589051 (1986-05-01), Santurtun et al.
patent: 4965710 (1990-10-01), Pelly et al.
patent: 4970620 (1990-11-01), Lehnhoff et al.
patent: 4975798 (1990-12-01), Edwards et al.
Baba Shigeyuki
Fujii Hiroshi
Ibori Satoshi
Kanbara Takatsugu
Nandoh Kenji
Dougherty Thomas M.
Hitachi , Ltd.
Stephan Steven L.
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