公开(公告)号：US20190260325A1

公开(公告)日：2019-08-22

申请号：US16280778

申请日：2019-02-20

申请人： Jiangbo TIAN ,  Chunyan LAI ,  Junxi CAI ,  Narayan Chandra KAR ,  Debmalya BANERJEE ,  Ze LI ,  Jasmin Jijina SINKULAR ,  Lakshmi Varaha IYER

发明人： Jiangbo TIAN ,  Chunyan LAI ,  Junxi CAI ,  Narayan Chandra KAR ,  Debmalya BANERJEE ,  Ze LI ,  Jasmin Jijina SINKULAR ,  Lakshmi Varaha IYER

IPC分类号： H02P27/06 ,  H02P23/14

摘要： A motor drive for providing AC power to an electric motor includes a DC bus and three output terminals for connection to the electric motor. A positive switch selectively connects a positive conductor of the DC bus with each of the output terminals and a negative switch selectively connects a negative conductor of the DC bus with each of the output terminals. Each of the switches are Gallium Nitride (GaN) power switches. A controller commands each of the switches at a high switching speed between 10 kHz and 100 kHz using pulse width modulation to approximate an AC waveform on each of the output terminals. A dead time between activation of corresponding two of the switches conn to be selected to minimize a fifth-order harmonic distortion current.