Method and control circuitry for providing average current mode control in a power converter and an active power filter
AssigneeRaytheon Company
InventorJoe Ortiz
Life of this patent
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Abstract
Control circuitry uses modified average current mode control to regulate average current through an inductor of a power converter. Control circuitry uses modified average current mode control to regulate average current through an inductor of an active power filter. Control circuitry uses average current mode control to regulate average current through an inductor of an active power filter. This average current mode control negates modulation of the average inductor current. In this way, output ripple current of the power converter does not have a significant effect on the input current drawn by the power converter.
Claims24
Control circuitry for a power converter comprising:
- a voltage error amplifier to generate a voltage error amplifier output based on a difference between an output voltage of the power converter and a reference voltage;
- a current error amplifier to generate a current error amplifier output based on a difference between the voltage error amplifier output and a first current sense signal;
- and
- a comparator to generate a current regulation signal based on the current error amplifier output and a second current sense signal,
- wherein the current regulation signal is to control current in an inductor of the power converter.
An active power filter comprising:
- a power converter;
- and
- control circuitry to control an input current drawn by the power converter on a pulse-by-pulse basis, the control circuitry comprising:
- a voltage error amplifier to generate a voltage error amplifier output based on a difference between an output voltage of the power converter and a reference voltage;
- summing circuitry to combine the voltage error amplifier output with an input voltage feedforward signal and an output load feedforward signal to generate a summed signal;
- a current error amplifier to generate a current error amplifier output based on the summed signal and a first current sense signal;
- and
- a comparator to generate a current regulation signal based on the current error amplifier output and a second current sense signal.
A method for controlling input current drawn by a power converter on a pulse-by-pulse basis comprising:
- generating a voltage error amplifier output based on a difference between the output voltage of the power converter and a reference voltage;
- summing the voltage error amplifier output with an input voltage feedforward signal and an output load feedforward signal to generate a summed signal;
- generating a current error amplifier output based on a difference between the summed signal and a current sense signal;
- and
- generating a pulse width modulated current regulation signal based on a difference between the current error amplifier output and a second current sense signal, the current regulation signal to control an input current drawn by the power converter on a pulse-by-pulse basis.
Dependencies are inferred from the claim text.