公开(公告)号：US20220227235A1

公开(公告)日：2022-07-21

申请号：US17154155

申请日：2021-01-21

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Brent S. Gagas ,  Brian A. Welchko ,  Kerrie M. Spaven

IPC: B60L15/20 ,  B60L15/02 ,  B60L15/08

Abstract: A method for increasing a default electric stall torque limits in a motor vehicle having an electrified powertrain inclusive of a traction power inverter module (TPIM) connected to an electric traction motor includes receiving vehicle level inputs via a controller. The controller is programmed with the default electric stall torque limits. The method includes selecting an inverter control strategy, via the controller, as a selected inverter control strategy in response to the vehicle level inputs, the strategy including temporarily increasing the default electric stall torque limits while applying a pulse width modulation (PWM) type at a corresponding PWM switching frequency. The method also includes controlling an output state of the TPIM and the electric traction motor over a calibrated duration, via the controller, using the selected inverter control strategy. A motor vehicle includes the controller, road wheels, TPIM, and traction motor.

公开(公告)号：US20220126701A1

公开(公告)日：2022-04-28

申请号：US17080033

申请日：2020-10-26

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Brent S. Gagas ,  Brian A. Welchko ,  Kerrie M. Spaven

IPC: B60L15/20 ,  B60K1/00 ,  B60K1/04 ,  B60L50/60 ,  B60L53/24

Abstract: Presented are high-voltage electrical systems, control logic, and electric-drive vehicles with optimized motor torque output. A method of operating an electric-drive vehicle includes a controller identifying the vehicle's operating mode and determining calibration settings corresponding to this operating mode. These calibration settings include low and high coolant temperature (CoolTemp) thresholds, and motor-calibrated torque limits as a function of CoolTemp. The controller determines if the present CoolTemp of the power inverter's coolant is greater than the low CoolTemp threshold and less than the high CoolTemp threshold. If so, the controller sets a motor torque limit of the vehicle's electric motor to a torque limit value selected from a fixed torque limit region within the torque limits data between the low and high CoolTemp thresholds. The controller operates the power inverter to regulate the transfer of electrical power between a rechargeable battery and the electric motor based on the motor torque limit.

公开(公告)号：US11787384B2

公开(公告)日：2023-10-17

申请号：US17532258

申请日：2021-11-22

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Brent S. Gagas ,  Kerrie M. Spaven ,  Brian A. Welchko

IPC: B60W10/08 ,  B60W10/26

CPC classification number: B60W10/08 ,  B60W10/26 ,  B60W2510/244 ,  B60W2710/081 ,  B60W2710/083

Abstract: An electric drive system, method and apparatus includes a rechargeable energy storage unit, a power inverter, and a rotary electric machine. Transfer of electrical power between the rechargeable energy storage unit and the rotary electric machine is governed by a pulse width modulation (PWM) switching frequency, which is one of a non-six-step switching mode or a six-step switching mode. Executable instructions determine a rotational speed, a torque command, a torque direction, a bus voltage, and a hysteresis band, determine a modulation index command in response to the rotational speed, the torque command, the torque direction, and the bus voltage, and command operation of the rotary electric machine in one of the non-six-step switching mode or the six-step switching mode employing the modulation index command.

公开(公告)号：US11685261B2

公开(公告)日：2023-06-27

申请号：US17080033

申请日：2020-10-26

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Brent S. Gagas ,  Brian A. Welchko ,  Kerrie M. Spaven

IPC: B60L15/20 ,  B60K1/00 ,  B60K1/04 ,  B60L50/60 ,  B60L53/24

CPC classification number: B60L15/20 ,  B60K1/00 ,  B60K1/04 ,  B60L50/60 ,  B60L53/24 ,  B60L2210/40 ,  B60L2240/421 ,  B60L2240/423 ,  B60L2240/525 ,  B60L2260/42 ,  B60L2260/44

Abstract: Presented are high-voltage electrical systems, control logic, and electric-drive vehicles with optimized motor torque output. A method of operating an electric-drive vehicle includes a controller identifying the vehicle's operating mode and determining calibration settings corresponding to this operating mode. These calibration settings include low and high coolant temperature (CoolTemp) thresholds, and motor-calibrated torque limits as a function of CoolTemp. The controller determines if the present CoolTemp of the power inverter's coolant is greater than the low CoolTemp threshold and less than the high CoolTemp threshold. If so, the controller sets a motor torque limit of the vehicle's electric motor to a torque limit value selected from a fixed torque limit region within the torque limits data between the low and high CoolTemp thresholds. The controller operates the power inverter to regulate the transfer of electrical power between a rechargeable battery and the electric motor based on the motor torque limit.

公开(公告)号：US20230159014A1

公开(公告)日：2023-05-25

申请号：US17532258

申请日：2021-11-22

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Brent S. Gagas ,  Kerrie M. Spaven ,  Brian A. Welchko

IPC: B60W10/08 ,  B60W10/26

CPC classification number: B60W10/08 ,  B60W10/26 ,  B60W2510/244 ,  B60W2710/083 ,  B60W2710/081

Abstract: An electric drive system, method and apparatus includes a rechargeable energy storage unit, a power inverter, and a rotary electric machine. Transfer of electrical power between the rechargeable energy storage unit and the rotary electric machine is governed by a pulse width modulation (PWM) switching frequency, which is one of a non-six-step switching mode or a six-step switching mode. Executable instructions determine a rotational speed, a torque command, a torque direction, a bus voltage, and a hysteresis band, determine a modulation index command in response to the rotational speed, the torque command, the torque direction, and the bus voltage, and command operation of the rotary electric machine in one of the non-six-step switching mode or the six-step switching mode employing the modulation index command.

公开(公告)号：US11420523B2

公开(公告)日：2022-08-23

申请号：US17032449

申请日：2020-09-25

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Brent S. Gagas ,  Brian A. Welchko ,  Kerrie M. Spaven

IPC: B60K1/04 ,  B60L15/20 ,  B60L50/60 ,  B60L53/20 ,  H02P29/68 ,  H02P27/08

Abstract: Presented are high-voltage electrical systems with optimized pulse width modulation (PWM) control, methods for making/using such systems, and vehicles with enhanced electric drive capabilities via PWM type and frequency control. A method of operating an electrical system includes an electronic controller determining a PWM region layout with multiple PWM regions arranged in a torque-speed curve calibrated to an electric motor and power inverter. The controller selects one of the PWM regions based on a speed and torque of the motor, and selects a PWM type based on this selected PWM region. The controller selects a PWM switching frequency style based on the selected PWM region, and selects a PWM switching frequency based on the selected PWM region, switching frequency style, and PWM type. The controller commands a power inverter to regulate transfer of electrical power between a rechargeable battery and the motor based on the PWM type and switching frequency.