Other

Valeo Vision

Societe Pour L'equipement De Vehicules

Jean-Pierre Ordines

Jean-Michel Detroyat

Dominique Bacot

A resistive load, such as a discharge lamp, is connected in a circuit which includes a measuring circuit for measuring the instantaneous power absorbed at the terminals of the load. The measuring circuit includes:

Measuring circuit for measuring instantaneous power across a

A high voltage generator 1 for an electrostatic dust precipitator 2 comprises a low voltage oscillator 6, operating from a low voltage continuous source, such as a car battery, which supplies a current chopper 7. The output from the chopper 7 is fed to the primary winding 9 of an induction coil 10. The secondary winding 11 of the coil 10 is connected to one of a metal surface 3 of the dust precipitator to apply a high potential difference between the metal surfaces 3,4 to precipitate dust. Preferably the metal surface 3 is connected to the secondary winding 11 via a high voltage diode.

High voltage generator for an electrostatic dust precipitator

The invention provides a distributor device for H.T. supply to an internal combustion engine, and comprising several ignition coils and a single contact breaker to interrupt supply to one or more of those coils at any instant, each of the coils having its primary winding shunted by a thyristor which can be controlled to select whether the primary winding of that particular coil is to be energized, or not, as the case may be. In one embodiment, the thyristors are polarized so as to conduct in a direction allowing 'idling' circulation of current through the closed circuit comprising the shunting thyristor and its associated primary winding; in another embodiment the thyristors are polarized in the reverse direction and a diode is connected between the gate and the cathode of each thyristor to protect the cathode from gate voltage and another diode is connected to protect the gating circuit of that particular thyristor. The coils may be connected all in series, or all in parallel, or in parallel-connected sub-assemblies which are then strung in series.

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Clamart, France

Jean-Pierre Ordines