US 11,777,403 B2
Control device for power conversion device
Mohammad Bani Shamseh, Tokyo (JP)
Assigned to TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION, Chuo-ku (JP)
Appl. No. 17/755,072
Filed by TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION, Chuo-ku (JP)
PCT Filed Oct. 5, 2020, PCT No. PCT/JP2020/037758
§ 371(c)(1), (2) Date Apr. 20, 2022,
PCT Pub. No. WO2022/074715, PCT Pub. Date Apr. 14, 2022.
Prior Publication US 2022/0399802 A1, Dec. 15, 2022
Int. Cl. H02M 1/32 (2007.01); H02M 1/00 (2006.01); H02M 1/084 (2006.01)
CPC H02M 1/325 (2021.05) [H02M 1/0009 (2021.05); H02M 1/0087 (2021.05); H02M 1/084 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A control device for a power conversion device, the control device comprising:
a first conversion unit configured to convert a detected value of alternating current (AC)-side current in a power converter that converts direct current (DC) power into AC power into a normal phase d-axis current value and a reversed phase d-axis current value;
a second conversion unit configured to convert a detected value of AC-side voltage in the power converter into a normal phase d-axis voltage value and a reversed phase d-axis voltage value;
a current command value generator configured to generate a provisional normal phase d-axis current command value, a provisional normal phase q-axis current command value, a provisional reversed phase d-axis current command value, and a provisional reversed phase q-axis current command value on a basis of a detected value of DC-side voltage and a detected value of DC-side current of the power converter, the normal phase d-axis current value and the reversed phase d-axis current value from the first conversion unit, and the normal phase d-axis voltage value and the reversed phase d-axis voltage value from the second conversion unit, so as to compensate for the AC-side voltage of the power converter; and
a limiter configured to respectively set limit values of a provisional normal phase d-axis current command value, a provisional normal phase q-axis current command value, a provisional reversed phase d-axis current command value, and a provisional reversed phase q-axis current command value that are generated by the current command value generator so that the AC-side current value of the power converter does not exceed a preset value; and
a controller configured to control the power converter within the limit values set by the limiter on a basis of a determined normal phase d-axis current command value, a determined normal phase q-axis current command value, a determined reversed phase d-axis current command value, and a determined reversed phase q-axis current command value that are obtained from the provisional normal phase d-axis current command value, the provisional normal phase q-axis current command value, the provisional reversed phase d-axis current command value, and the provisional reversed phase q-axis current command value, respectively.