Electrical transmission or interconnection systems – With nonswitching means responsive to external nonelectrical... – Temperature responsive
Patent
1986-01-16
1988-02-23
Zazworsky, John
Electrical transmission or interconnection systems
With nonswitching means responsive to external nonelectrical...
Temperature responsive
307253, 307571, 323235, 323319, H03K 1772, H03K 1704, H03K 1760, H03K 17687
Patent
active
047272724
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a drive-interface for a static electronic switch with a controlled blocking (OFF), in particular a semiconducting switch. The object of the invention is an interface to be inserted between said static switch and a control stage designed to generate a switch control signal as a function of the application to which the invention is put.
The invention applies to a static switch with a controlled blocking (OFF), that is, capable, upon an OFF command, to break the current through said switch the moment the said OFF command appears. In particular the invention applies to blocking thyristors, field-effect transistors, blocking static switches constituted by transistor systems. The invention does not apply to such components as conventional thyristors, triacs, of which the control electrode may institute conduction but is incapable of causing instant blocking. The conduction of these latter components follows a very specific logic wholly unrelated to that of the former ones, and their scope of application is entirely different.
The static switches which are the object of the invention can be defined as:
having at least one control electrode and two power electrodes,
being capable of being in at least two states, a conduction state characterized by a low voltage drop across the power electrodes, and blocking state characterized by low leakage current between these electrodes,
and being characterized by the two states corresponding to different polarities of the control electrode, each change being due to a change of state of that electrode.
A static converter employing transistors of which the voltage bias V.sub.CEX (voltage bias at zero collector current and negatively biased base) is much higher than its voltage bias V.sub.CEO (open-bias voltage base) is described in the French patent 78.32428 or U.S. Pat. No. 4,330,819, and more particularly, so are "inverted mesa" transistors. This converter includes an intermediate processing stage for the control signal of the above cited transistor(s), designed to make use in wholly reliable manner of the range of applied voltages between V.sub.CEO and V.sub.CEX so as to considerably broaden the range of supply voltages for the converter. One of the objects of this patent is to create a converter for the rectified industrial potentials of 380 volts.
The present invention excludes the above cited transistors and its purpose is to drive other components comprising static semiconducting switches with controlled OFF as defined above (blocking thyristors, field-effect transistors . . . ).
The main object of the invention is to create a drive interface for these switches which in conjunction with these assumes the overall function of a switch that is rendered spontaneously conducting and which can be controlled to be blocking (OFF), where this function corresponds to a DUAL logic of a conventional thyristor (the operational logic of a thyristor being the control at turn-on and for spontaneous OFF).
Another object of the invention is to fill the above cited function by assuring switching at very low power losses.
Yet another object of the invention is to eliminate the need for accessory circuits for turn-on switching and to avoid all their inherent constraints (recovery dead times, power dissipation). Therefore the accessory switching circuits can be made specific to OFF switching and essentially be capacitive, so as to entail neither dead recovery times nor dissipation of stored energy.
A further object of the invention and deriving from the two proceeding ones is to expand the frequency range of the typical operation of the driven static switch(es).
To that end and in conformity with the invention, a drive interface is inserted between the static switch and the control stage associated with said switch to control its switching in sequences determined by the application (this control stage generating a control signal composed of permission to conduct and OFF commands). The drive interface comprises:
a circuit detecting the voltage across the two power elec
REFERENCES:
patent: 3633094 (1972-01-01), Clements
patent: 3728557 (1973-04-01), Pelly et al.
patent: 4330819 (1982-05-01), Foch et al.
patent: 4528494 (1985-07-01), Bloomer
Foch Henri
Roux Jacques
A.N.V.A.R.
Dutton, Jr. Harold H.
Zazworsky John
LandOfFree
Drive-interface for a static electronic switch with controlled " does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Drive-interface for a static electronic switch with controlled ", we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drive-interface for a static electronic switch with controlled " will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-604411