公开(公告)号：US20220231624A1

公开(公告)日：2022-07-21

申请号：US17613713

申请日：2020-05-29

申请人： Aiswarya BALAMURALl ,  Philip KORTA ,  Shruthi MUKUNDAN ,  Anik ANIMESH ,  Narayan Chandra KAR ,  Lakshmi Varaha IYER ,  Gerd SCHLAGER ,  MAGNA INTERNATIONAL INC. ,  UNIVERSITY OF WINDSOR

发明人： Aiswarya BALAMURALI ,  Phlip KORTA ,  Shruthi MUKUNDAN ,  Anik ANIMESH ,  Narayan Chandra KAR ,  Lakshmi Varaha IYES ,  Gerd SCHLAGER

IPC分类号： H02P21/14 ,  H02P6/08 ,  H02P21/06 ,  H02P27/08 ,  B60L15/02 ,  H02P21/00

摘要： A motor drive system and method for determining an optimized efficiency of the motor drive system are provided. The motor drive system includes a system controller, a motor drive having includes an inverter configured to generate the AC power upon one or more motor leads, and an electric motor, which is to convert the AC power from the motor leads to rotational energy. A dynamometer may include a load coupled to the shaft and sensors to measure to measure operating characteristics such as torque and speed of the electric motor. The system controller is configured to generate a lookup table, with an entry describing an output current command for operating the inverter and the motor at a maximum system efficiency for a given combination rotational speed and output torque. Motor temperature may also be measured and used as an additional index into the lookup table.

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.

公开(公告)号：US20220216806A1

公开(公告)日：2022-07-07

申请号：US17605385

申请日：2020-04-24

申请人： MAGNA INTERNATIONAL INC. ,  UNIVERSITY OF WINDSOR

发明人： Animesh KUNDU ,  Aiswarya BALAMURALI ,  Himavarsha DHULIPATI ,  Narayan Chandra KAR ,  Lakshmi Varaha IYER ,  Gerd SCHLAGER ,  Philip KORTA ,  Wolfgang BAECK

IPC分类号： H02M7/5387 ,  H02M1/00 ,  H02M1/084 ,  H02P27/08 ,  B60L15/00

摘要： A motor drive system for an electrified vehicle includes a DC source, such as a battery, and an inverter, which includes one or more phase drivers, each configured to switch current from the DC source to generate AC power upon one or more output terminals using a hybrid of two or more different solid-state switches, each having a corresponding voltage rating. A nine-switch inverter includes three phase drivers, each including high, low, and middle solid-state switches, with Si-MOSFET high and low switches having a first voltage rating of half of the rated voltage of the system, and with Gallium Nitride (GaN) transistors rated to block a full rated voltage of the system used for the middle switches. A delay driver synchronizes timing between two different solid-state switches by energizing control terminals at different rates. The inverter can be operated using near-state pulse-width modulation (NSPWM) to reduce switching losses.

公开(公告)号：US20210234475A1

公开(公告)日：2021-07-29

申请号：US15734830

申请日：2019-06-06

申请人： MAGNA INTERNATIONAL INC. ,  UNIVERSITY OF WINDSOR

发明人： Debmalya BANERJEE ,  Chunyan LAI ,  Jiangbo TIAN ,  Animesh KUNDU ,  Eshaan GHOSH ,  Narayan Chandra KAR ,  Jasmin Jijina SINKULAR ,  Lakshmi Varaha IYER ,  Philip KORTA

IPC分类号： H02M7/483 ,  H02P27/08

摘要： A multilevel power converter, or inverter, for converting a direct current electrical power to an alternating current electrical power includes one or more 2-level converters each including gallium nitride (GaN) transistors configured to switch two input lines to a three-phase output line. The multilevel power converter may be used in a motor drive circuit, which may provide a 3-phase AC supply. Two power converters, which may be 2-level or 3-level power converters, may be alternately switched to provide the AC power to an AC motor by an output stage including bi-directional switching transistors configured to switch a corresponding three-phase output lines from the multilevel power converters. The multilevel power converters switch input lines from a neutral-point clamped input stage including capacitors connected in series across input terminals having a DC voltage therebetween to energize a midpoint terminal with an intermediate voltage half of the voltage between the input terminals.