US 9,812,940 B2
Offset voltage generator and method for generating an offset voltage of three-phase inverter
Hak-Jun Lee, Gyeonggi-do (KR); and An-No Yoo, Gyeonggi-do (KR)
Assigned to LSIS CO., LTD., Gyeonggi-Do (KR)
Filed by LSIS CO., LTD., Gyeonggi-do (KR)
Filed on Apr. 13, 2016, as Appl. No. 15/98,203.
Claims priority of application No. 10-2015-0052599 (KR), filed on Apr. 14, 2015.
Prior Publication US 2016/0322890 A1, Nov. 3, 2016
Int. Cl. H02M 1/08 (2006.01); H02M 1/12 (2006.01); H02M 7/5387 (2007.01); H02M 7/44 (2006.01); H02P 27/06 (2006.01); H02P 27/08 (2006.01); H02M 7/5395 (2006.01); H02M 1/00 (2006.01)
CPC H02M 1/08 (2013.01) [H02M 1/12 (2013.01); H02M 7/44 (2013.01); H02M 7/5395 (2013.01); H02M 7/53871 (2013.01); H02M 7/53873 (2013.01); H02P 27/06 (2013.01); H02P 27/08 (2013.01); H02P 27/085 (2013.01); H02M 2001/0025 (2013.01); H02M 2001/0048 (2013.01); H02M 2007/53876 (2013.01); H02P 2209/13 (2013.01); Y02B 70/1491 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An offset voltage generator in a three-phase inverter, the three-phase inverter operating in a continuous modulation mode or a discontinuous modulation mode, the offset voltage generator comprising:
a first limiter configured to compare a first phase-voltage signal with a maximum limit value and a minimum limit value to output a first limit-voltage signal;
a second limiter configured to compare a second phase-voltage signal with the maximum limit value and the minimum limit value to output a second limit-voltage signal;
a third limiter configured to compare a third phase-voltage signal with the maximum limit value and the minimum limit value to output a third limit-voltage signal; and
a summer configured to add up a difference between the first phase-voltage signal and the first limit-voltage signal, a difference between the second phase-voltage signal and the second limit-voltage signal, and a difference between the third phase-voltage signal and the third limit-voltage signal, to output an offset voltage,
wherein the maximum limit value and the minimum limit value are determined by a predetermined weight and a DC link voltage of the three-phase inverter.