Commissariat a L'energie Atomique Et Aux Energies Alternatives

Schneider Electric Industries Sas

Université Grenoble Alpes

Aledia

Christophe Durand

Joël Eymery

Delcho Penkov

Damien Salomon

Amélie Dussaigne

Xiaojun Chen

Grace Gandanegara

Philipe Gilet

The invention relates to a method for manufacturing an optoelectronic device () including wire-like, conical, or frustoconical semiconductor elements () predominantly comprising a III-V compound. Each semiconductor element extends along an axis and includes a portion (), the side surfaces () of which are covered with a shell () including at least one active region (), wherein the portions are created by continuous growth in a reactor, and wherein the temperature in the reactor varies in an uninterrupted manner from a first temperature value that favors growth of first crystallographic planes perpendicular to said axis, to a second temperature value that is strictly lower than the first temperature value and favors growth of second crystallographic planes parallel to said axis.

Optoelectronic device comprising three-dimensional semiconductor elements, and method for manufacturing said device

A control method brakes an electric motor connected to a voltage source. The method involves, in each cycle, the supply of current to the motor, with a delay t, at an angle &#x3b1;. The method includes a sequence such that, for every n cycle, the following steps are executed: a) determining the value of a variation in the resistance of the motor during the preceding n cycles of the voltage, b) comparing the value of the variation in resistance with a threshold resistance value R, c) increasing in the delay tif the value of the variation in resistance is lower than the threshold resistance value. The increase in the delay tis executed in accordance with a gamma command, where the angle &#x3b1; lies between 50&#xb0; and 80&#xb0;.

Control method for breaking an electric motor

The invention relates to a method of starting an electric motor () powered by an alternating power supply voltage, said method consisting of supplying current to the motor () with a delay t, during each period of the power supply voltage. The starting method comprises a first sequence in which the following steps are carried out during each nperiod of the power supply voltage, where n is an integer number greater than 0: a) determine the value of a variation of a resistance of the electric motor during the previous n periods of the power supply voltage; b) compare said value of the variation of the determined motor resistance with a first threshold resistance value; c) if the value of the variation of the motor resistance is less than the first threshold value, reduce t. The invention also relates to a starter device and a computer program.

Apparatus and means for starting of AC motors, algorithm for self-adapting motor start with soft-starter

A method of selective growth without catalyst on a semi-conducting structure. According to the method, which is applicable in electronics in particular: a semi-conducting structure is formed from first gaseous or molecular flows; at a same time or subsequently, at least one second gaseous or molecular flow is added thereto, to selectively in situ grow a dielectric layer on the structure; and then another semi-conducting structure is grown thereon from third gaseous or molecular flows.

Method of selective growth without catalyst on a semiconducting structure

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Grenoble, France

Christophe Durand