US 12,328,060 B2
Power conversion circuit controller with feedforward correction
Akinu Nakabayashi, Tokyo (JP); Takashi Kaneyama, Tokyo (JP); Matahiko Ikeda, Tokyo (JP); Shingo Kato, Tokyo (JP); Ryota Kondo, Tokyo (JP); and Hiroki Kurahashi, Tokyo (JP)
Assigned to Mitsubishi Electric Corporation, Tokyo (JP)
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
Filed on Feb. 22, 2022, as Appl. No. 17/677,483.
Claims priority of application No. 2021-082086 (JP), filed on May 14, 2021.
Prior Publication US 2022/0368231 A1, Nov. 17, 2022
Int. Cl. H02M 1/00 (2007.01)
CPC H02M 1/0025 (2021.05) [H02M 1/0022 (2021.05)] 10 Claims
OG exemplary drawing
 
1. A power conversion circuit controller with feedforward correction that controls a power conversion circuit which is provided with a high potential side switching device or diode, and a low potential side switching device which are connected between a second high potential side terminal and a second low potential side terminal in series, and a reactor whose one end is connected to a first high potential side terminal and whose other end is connected to a connection node between the high potential side switching device or diode, and the low potential side switching device, wherein the second low potential side terminal and the first low potential side terminal are connected, and performs power conversion between the first high potential side terminal and the first low potential side terminal, and the second high potential side terminal and the second low potential side terminal, the power conversion circuit controller with feedforward correction comprising at least one processor configured to implement:
a second voltage detector that detects a second voltage which is a voltage of the second high potential side terminal with respect to the second low potential side terminal;
a first voltage detector that detects a first voltage which is a voltage of the first high potential side terminal with respect to the first low potential side terminal;
a control value calculator that changes a control value by a feedback control so that a detection value of the second voltage approaches a target value of the second voltage;
a control value corrector that calculates a control value for control, by correcting the control value based on a detection value of the first voltage so as to correct, in a feedforward manner, a change of the control value due to a change of the first voltage; and
a switching controller that controls on/off of the high potential side switching device and the low potential side switching device, or the high potential side switching device based on the control value for control,
further including a control gain setter that sets a proportional gain and an integral gain, wherein the control value calculator calculates a proportional control value by multiplying the proportional gain by a deviation between the detection value of the second voltage and the target value of the second voltage.