Alcatel Espace

Alcatel

Organisation Europeenne De Recherches Spatiales

Antoine Capel

Pascal Lecointe

Jean-Claude Marpinard

The invention relates to a conditioning circuit that measures operating points of a power supply to deduce therefrom the current-voltage characteristic thereof and to determine directly the voltage corresponding to its maximum power point, without using any kind of tracking algorithm that causes the operating point of the power unit to oscillate about the maximum power point. The maximum power point voltage VMPP is supplied to a controller which regulates a power cell by slaving it to the input voltage until the output voltage of the supply is equal to the maximum power point voltage V. The invention also relates to a solar generator and an associated conditioning method. One particular application is to high-power satellites.

Conditioning circuit for a power supply at the maximum power point, a solar generator, and a conditioning method

Energy regulation system for an electrical power supply bus

The charging control system for a battery of rechargeable electric storage cells, and in particular for a lithium battery, including cells connected in series which are adapted to be connected to a common electrical power supply. The system includes individual cell charging control units each of which is equipped with means adapted, in operation, to be connected to the power supply to take the energy necessary for charging a cell and which itself provides all of the operations for charging that cell using the energy thus taken.

Charging control system for a battery of electric storage cells and in particular a battery of lithium cells

A circuit for regulating a parameter by means of a bidirectional current chopper structure suitable for transferring energy from an input network to an output network via the bidirectional current chopper structure, the current flowing through the structure being in the form of a triangular wave. The circuit is particularly suitable for space applications.

Circuit for regulating a parameter by means of a bidirectional current

A method of controlling a chopper regulator, which method is a time-varying parameter-regulation method having a very wide passband and controlling energy at each instant, in which the stable state of the system at the following sample is predicted, thereby making it possible to achieve regulation under very good safety conditions. A circuit for implementing the method is also disclosed. The invention is particularly suitable for space applications.

Method of controlling a chopper regulator and a circuit implementing

A power supply module for control electronics of a DC motor, the module comprising a power cell of the stepdown type controlled as a function of peak current, the current flowing in both directions, and the module including a bridge stage likewise capable of passing current in both directions and including a reactive element constituted by one of the windings of the DC motor. The invention is particularly suitable for space applications.

Power module for electronic control of a DC motor

A circuit for regulating an electrical parameter to be servo-controlled by transferring electricity between two networks (11, 12), wherein the circuit (10) is a bidirectional current circuit providing electrical isolation between the two networks (11, 12). The circuit is particularly applicable to space applications.

Electrical regulation and energy transfer circuit

A synchronized electric modulator for the control in synchronized conductance control mode of a regulation unit, thereby to assure a close control of the current peak value. A current reference is generated which varies as a function of a command signal representing the deviation of a parameter value in a system from its reference value. The current through the load is monitored and sensed to be compared to the current reference so as to produce a control signal for the regulation unit, which is dependent on the variation of the sensed current under the synchronization of external clock pulses.

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Ramonville, France

Antoine Capel