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1. WO2006112991 - PROCEDE ET CIRCUITS DE COMMANDE DESTINES A ASSURER UNE COMMANDE DE MODE DE COURANT MOYEN DANS UN CONVERTISSEUR DE PUISSANCE ET UN FILTRE DE PUISSANCE ACTIF

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CLAIMS
What is claimed is:

1. Control circuitry (107) for a power converter (106) comprising:
a voltage error amplifier (101) to generate a voltage error amplifier output (115) based on a difference between an output voltage ( 113) of the power converter (106) and a reference voltage (126);
a current error amplifier (130) to generate a current error amplifier output (131) based on a difference between the voltage error amplifier output (115) and a first current sense signal (118); and
a comparator (103) to generate a current regulation signal (120) based on the current error amplifier output (131) and a second current sense signal (119), wherein the current regulation signal (120) is to control current in an inductor (122) of the power converter (106).

2. The control circuitry of claim 1 wherein the first and second current sense signals (118) (119) comprise a voltage corresponding to a sensed current in the inductor (122),
wherein the current regulation signal (120) comprises a pulse width modulated square wave, and
wherein the comparator (103) generates the current regulation signal (120) by comparing a difference between the current error amplifier output (131) and the second current sense signal (119), and
wherein the current regulation signal (120) is to control an on/off duty cycle of one or more switching transistors of the power converter (106) to control the current in the inductor (122).

3. The control circuitry of claim 1 wherein the first current sense signal (118) comprises a voltage corresponding to a sensed current in the inductor (122), and wherein the second current sense signal (119) comprises a voltage corresponding to a sensed current that is switched as current in one or more switching transistors (124) of the power converter (106).

4. The control circuitry of claim 1 further comprising summing circuitry (104) to combine the voltage error amplifier output (115) with an input voltage feedforward signal (111) and an output load feedforward signal (114) to generate a summed signal (116),
wherein the current error amplifier (130) is to generate the current error amplifier output (131) based on the summed signal (116) and the first current sense signal (118).

5. An active power filter (300) comprising:
a power converter (106); and
control circuitry (107) to control an input current (110) drawn by the power converter (106) on a pulse-by-pulse basis, the control circuitry comprising: a voltage error amplifier (101) to generate a voltage error amplifier output (115) based on a difference between an output voltage (113) of the power converter (106) and a reference voltage (126);
summing circuitry (104) to combine the voltage error amplifier output (115) with an input voltage feedforward signal (111) and an output load feedforward signal ( 114) to generate a summed signal (116);
a current error amplifier (130) to generate a current error amplifier output (131) based on the summed signal (116) and a first current sense signal (118); and a comparator (103) to generate a current regulation signal (120) based on the current error amplifier output (131) and a second current sense signal (119).

6. The active power filter of claim 5 wherein the first and second current sense signals (118) (119) comprise voltages corresponding to a sensed current in an inductor (122) of the power converter (106),
wherein the input voltage feedforward signal (111) corresponds to an input voltage of the power converter (106), and wherein the output load feedforward signal (114) indicates one of a level in output current, a change in the output current, and an anticipated change in the output current, the output current being drawn by an output load (108) receiving the output current from the power converter (106).

7. The active power filter of claim 6 wherein the first current sense signal (118) comprises a voltage corresponding to a sensed current in the inductor (122), and
wherein the second current sense signal (119) comprises a voltage corresponding to a sensed current that is switched as current in one or more switching transistors (124) of the power converter (106).

8. The active power filter of claim 6 wherein the first current sense signal (118) comprises a voltage corresponding to a sensed current in the inductor (122), and
wherein the comparator (103) is to generate the current regulation signal (120) based on the current error amplifier output (131) and a voltage ramp signal.

9. A method for controlling input current (110) drawn by a power converter (106) on a pulse-by-pulse basis comprising:
generating a voltage error amplifier output (115) based on a difference between the output voltage (113) of the power converter (106) and a reference voltage (126);
summing the voltage error amplifier output (115) with an input voltage feedforward signal (111) and an output load feedforward signal (114) to generate a summed signal (116);
generating a current error amplifier output (131) based on a difference between the summed signal (116) and a current sense signal (118); and
generating a pulse width modulated current regulation signal (120) based on a difference between the current error amplifier output (131) and a second current sense signal (119), the current regulation signal (120) to control an input current (110) drawn by the power converter (106) on a pulse-by-pulse basis.

10. The method of claim 9 wherein the first current sense signal (118) comprises a voltage corresponding to a sensed current in the inductor (122), and wherein the second current sense signal (119) comprises a voltage corresponding to a sensed current that is switched as current in one or more switching transistors (124) of the power converter (106).