US 12,328,069 B2
Device for controlling power conversion circuit
Tomoyuki Taniguchi, Tokyo (JP); Satoshi Murakami, Tokyo (JP); Akinu Nakabayashi, Tokyo (JP); and Ryota Kondo, Tokyo (JP)
Assigned to MITSUBISHI ELECTRIC CORPORATION, Tokyo (JP)
Appl. No. 17/927,898
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Aug. 6, 2020, PCT No. PCT/JP2020/030209
§ 371(c)(1), (2) Date Nov. 28, 2022,
PCT Pub. No. WO2022/029961, PCT Pub. Date Feb. 10, 2022.
Prior Publication US 2023/0208300 A1, Jun. 29, 2023
Int. Cl. H02M 3/158 (2006.01); H02M 1/00 (2007.01); H02M 3/157 (2006.01)
CPC H02M 3/158 (2013.01) [H02M 1/0003 (2021.05); H02M 3/157 (2013.01); H02M 1/0032 (2021.05)] 20 Claims
OG exemplary drawing
 
1. A control device for a power conversion circuit in which switching elements and a reactor are connected between first terminals and second terminals and which performs power conversion between the first terminals and the second terminals, the control device comprising:
feedback control circuitry including a controller which calculates a duty ratio for the switching elements on the basis of a command value and a detection value of electrical information related to the power conversion circuit; and
continuous/discontinuous current mode distinguishment circuitry including
duty ratio increase/decrease distinguishment circuitry which performs distinguishment between increase and decrease in the duty ratio, and
output voltage detection value increase/decrease distinguishment circuitry which performs distinguishment between increase and decrease in a detection value of a voltage of the second terminals, wherein
if
the duty ratio increase/decrease distinguishment circuitry determines that a duty ratio measured at a previous time is larger than a duty ratio measured at a present time, and
the output voltage detection value increase/decrease distinguishment circuitry determines that a detection value measured at the present time is larger than a detection value measured at the previous time, or
if
the duty ratio increase/decrease distinguishment circuitry determines that the duty ratio measured at the previous time is smaller than the duty ratio measured at the present time, and
the output voltage detection value increase/decrease distinguishment circuitry determines that the detection value measured at the present time is smaller than the detection value measured at the previous time,
the continuous/discontinuous current mode distinguishment circuitry determines that an operation mode of the circuit is a discontinuous current mode, and feeds back a result of the determination to the feedback control circuitry.