Electrical transmission or interconnection systems – Personnel safety or limit control features – Interlock
Patent
1992-09-02
1994-04-19
Sikes, William L.
Electrical transmission or interconnection systems
Personnel safety or limit control features
Interlock
307282, 307246, 307270, 328 33, H03K 345, H03K 330
Patent
active
053048636
ABSTRACT:
A transformer driver having an unlimited duty cycle capability is disclosed herein. The transformer driver 10 of the present invention is coupled to an output circuit 20 and includes a transformer 32 having primary winding and secondary windings 30 and 34. The inventive driver 10 further includes a generator 26 for applying a plurality of charging pulses P1, P2 to the primary transformer winding 30 to keep the transformer from being saturated. A transistor buffer network 36 selectively electrically isolates the output circuit 20 from the transformer. In a particular embodiment the charging pulses P1, P2 serve to maintain the voltage at the control terminal 38 of a power transistor included within the output circuit.
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"Transformer-Isolated HEXFET Driver Provides very large duty cycle ratios" International Rectifier HEXFET Power Mosfet Designer's Manual, Chapter 9, Application Note 950A (1987).
Denson-Low Wanda K.
Hughes Aircraft Company
Lindeen III Gordon R.
Sikes William L.
Streeter William J.
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