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US 5,138,249 AGranted
Circuit for regulating a parameter by means of a bidirectional current structure
AssigneeAlcatel Espace
InventorAntoine Capel
Life of this patent
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Abstract
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.
Claims9
A servo-control circuit for regulating a parameter, said circuit comprising:
- an input network providing an input current and an input voltage;
- an output network receiving an output current and an output voltage;
- a bidirectional current chopper for transferring energy from said input network to said output network, current flowing through said bidirectional current chopper being in the form of a triangular wave;
- and
- a controller for measuring the input current i1(t), for controlling the transfer of energy in accordance with an external clock T which fixes a chopper frequency of said bidirectional current chopper, and for stopping energy transfer whenever a peak value of the measured input current i1(t) is such that:
- i1(t)=G.multidot.Vc if D<0.5
- i1(t)=G.multidot.Vc-Ko.multidot.t if 0.ltoreq.D.ltoreq.1
- where D=tc/T, T is the period of the external clock, tc is the conduction time of the bidirectional current chopper, Vc is a command function based on a stabilizing control by state feedback, and Ko and G are constants.
5 more elements
Dependencies are inferred from the claim text.