US 9,812,951 B2
Advanced PFC voltage controller
Maximiliano O. Sonnaillon, Sante Fe (AR)
Assigned to Pacific Power Source, Inc., Irvine, CA (US)
Filed by Pacific Power Source, Inc., Irvine, CA (US)
Filed on May 19, 2016, as Appl. No. 14/999,532.
Claims priority of provisional application 62/179,910, filed on May 21, 2015.
Claims priority of provisional application 62/179,906, filed on May 21, 2015.
Prior Publication US 2016/0352216 A1, Dec. 1, 2016
Int. Cl. H02M 1/42 (2007.01); H02M 1/00 (2006.01)
CPC H02M 1/4208 (2013.01) [H02M 2001/0019 (2013.01); H02M 2001/0025 (2013.01); Y02B 70/126 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A voltage controller for use with a power factor correction converter, and the power factor correction converter connected to a DC to AC converter, the voltage controller comprising:
a digital controller comprising a voltage setpoint, a linear PI compensator, a non-linear gain, a peak hysteretic control, a current loop, and an output power feedforward;
power stages for providing voltage out feedback, voltage in feedback, inductor current feedback, and current out feedback;
the linear PI compensator regulating voltage based upon a moving average filter (MAF) that receives the voltage out feedback from the power stages with the MAF being tuned in real time based on the output frequency of aDC to AC converter;
the non-linear gain for determining a non-linear action when the voltage out feedback deviates from a setpoint by more than a pre-programmed limit and the non-linear action being utilized by the PI compensator to further accelerate voltage regulation;
the peak hysteretic control detects the voltage out feedback of a DC bus and directs the power factor correction voltage controller output to zero if the DC bus voltage exceeds a maximum value, when the voltage deviation exceeds a pre-programmed limit, and the hysteretic peak control directs the power factor correction voltage controller output to a maximum when the DC bus voltage reaches a minimum value, when the voltage deviation exceeds a pre-programmed limit;
the output power feedforward (FF) utilizing a MAF tuned in real time based on the output frequency of the DC to AC converter, and the applied FF term is the sum of a percentage of the output power FF term with the MAF plus a percentage of the FF term without the MAF, and the sum of both percentages equals 100%, and the ratio of the MAF versus the non-MAF components is defined by a coefficient that allows optimization of the power factor correction voltage controller; and
the output of the MAF, the setpoint, and the non-linear action, comprising the input to the linear PI compensator, and the output of the linear PI compensator and the output of the FF comprising the input to the peak hysteretic control, and the voltage out feedback is input to the peak hysteretic control and is utilized by the peak hysteretic control to prevent the digital controller from exceeding maximum limits, and the output from the peak hysteretic control comprising the input to a current loop, and an inductor current feedback from the power stages is utilized by the current loop, and the current loop comprising the input to the power stages, thereby forming a closed loop.