Switch Mode Energy Converter with Reduced Static Offset Induced by Stabilizing Ramp Wave

Abstract

The converter comprises a controllable switch (M) and control means (311) for generating signals for controlling the opening and closing instants of said changeover switch, said control means being of the current mode type requiring the application of current stabilization signals. The control means comprise: - means (20) for intermittently delivering said stabilization signal (RC) by applying said stabilization signal (RC) at a predetermined instant before a reference instant ) to be executed; and - comparison means (28) which generate the The control signal (CM) of the controllable switch (M), the setpoint signal (L) is subtracted by the intermittently delivered stable signal (RC) before being applied to the comparison means, or the measured The signal (L) is added to the intermittently delivered stable signal (RC) before being applied to the comparison means.

Description

technical field [0001] The invention relates to switch mode energy converters. [0002] The invention more particularly relates to switched-mode energy converters controlled in peak current mode or in charge control mode. Background technique [0003] Switched energy converters are based on the switching of switchable switches, which apply a chopping voltage to a filter circuit consisting of inductive and capacitive components. The control of the opening and closing instants of the or each switch makes it possible to generate a voltage and / or a greater or lesser current at the output of the converter by interacting with a load connected at the output of the converter . [0004] figure 1 Converter 10 is shown employing a non-isolated lowering topology "Buck" with passive rectification. In the present example, the controllable switch is a switching member with a controllable semiconductor of N-MOS transistor type (as shown or alternatively of P-MOS transistor type) mounted...

AI Technical Summary

Problems solved by technology

[0027] This is disadvantageous in the overall converter because the uncertainty of the current limit needs to take into account a considerable margin for the saturation current of the inductive component

This results in oversized components of these

Again, this difference is troublesome for converters that require precise current limiting, such as those connected to an aircraft's power grid, for which there is a requirement for starting current

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