Thales

Flavien Blanc

Christophe Taurand

The invention relates to a device for measuring current in an inductor and being connected in parallel with said inductor. The device includes a network in parallel with the inductor and connected to the terminals A and B comprising a resistor Rin series with a resistor Rin parallel with a capacitor C; a voltage offset circuit having a DC voltage generator E connected in parallel with an offset resistor (Roffset) in series with two parallel resistors Rand R, the positive pole of the voltage source being connected to terminal B of the inductor; a temperature compensation circuit comprising a current source controlled as a function of the temperature, one of the two terminals of the current source being connected to the negative pole of the generator E, the other terminal of the current source being connected to different points of the measurement device.

Device for non-dissipative measurement of the current in an inductor

A cellular inverter generates an alternating output voltage by a succession of serial combinations of DC voltage electrical sources that are available to it within switchable cells and, within a serial combination currently in use, by a voltage regulation using high-frequency chopping. This voltage regulation exhibits a certain lag and allows through an undesirable voltage step during the repositioning of its operating range caused by a change of the serial combination currently in use. The cellular inverter proposed comprises, in its high-frequency switch-mode voltage regulation circuit illustrated in the figure, a pre-compensation circuit that allows the lag to be compensated for and this undesirable voltage step to be considerably attenuated.

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Valence, France

Flavien Blanc