US 11,901,846 B2
Motor emulator
Seung-Ki Sul, Seoul (KR); Yong-Cheol Kwon, Seoul (KR); and Yoon-Ro Lee, Anyang-si (KR)
Assigned to PLECKO CO., LTD., Seoul (KR)
Appl. No. 16/964,371
Filed by PLECKO CO., LTD., Seoul (KR)
PCT Filed Oct. 15, 2018, PCT No. PCT/KR2018/012093
§ 371(c)(1), (2) Date Jul. 23, 2020,
PCT Pub. No. WO2019/146878, PCT Pub. Date Aug. 1, 2019.
Claims priority of application No. 10-2018-0008446 (KR), filed on Jan. 23, 2018; and application No. 10-2018-0092939 (KR), filed on Jan. 23, 2018.
Prior Publication US 2021/0036646 A1, Feb. 4, 2021
Int. Cl. H02P 27/06 (2006.01); G01R 19/165 (2006.01); G01R 31/28 (2006.01); G01R 31/42 (2006.01); G05B 17/02 (2006.01); H02M 7/5387 (2007.01); G01R 31/3183 (2006.01)
CPC H02P 27/06 (2013.01) [G01R 19/16538 (2013.01); G01R 31/2829 (2013.01); G01R 31/318307 (2013.01); G01R 31/42 (2013.01); G05B 17/02 (2013.01); H02M 7/5387 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A motor emulator for an Inverter Under Test (IUT), comprising:
a voltage following inverter configured to cancel an output voltage of the IUT at least partially; and
an output current control unit configured to control an output current of the IUT based on the output voltage of the IUT and an estimated current of an emulation target motor,
wherein the voltage following inverter includes:
a DC terminal voltage source;
a first switching unit connected to the DC terminal voltage source in parallel and electrically connected to an output terminal of the IUT; and
a first switching control unit configured to control switching of the first switching unit based on the output voltage of the IUT and a predetermined threshold voltage.