公开(公告)号：US20210184610A1

公开(公告)日：2021-06-17

申请号：US16715102

申请日：2019-12-16

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jiyu ZHANG ,  Siddharth BALLAL ,  Lei HAO ,  Wesley G. ZANARDELLI ,  Bojian CAO

IPC: H02P21/22 ,  H02P21/18 ,  H02P21/20 ,  H02P27/12

Abstract: A diagnostic system includes: a current command module configured to, based on a motor torque request, a motor speed, a direct current (DC) bus voltage, generate a d-axis current command for an electric motor and a q-axis current command for the electric motor; a voltage command module configured to, based on the d-axis current command and the q-axis current command, generate a d-axis voltage command and a q-axis voltage command; a switching control module configured to control switching of an inverter module based on the d-axis voltage command and the q-axis voltage command, where the inverter module is configured to apply power to stator windings of the electric motor from the DC bus; and a fault module configured to selectively indicate that the stator windings of the electric motor are degraded when the d-axis voltage command is less than a predetermined nominal d-axis voltage of the electric motor.

公开(公告)号：US20230314530A1

公开(公告)日：2023-10-05

申请号：US17706745

申请日：2022-03-29

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jiyu ZHANG ,  Nomar S. GONZALEZ SANTINI

IPC: G01R31/40 ,  H02M1/32 ,  H02M7/00

CPC classification number: G01R31/40 ,  H02M1/327 ,  H02M7/003

Abstract: A diagnostic system for diagnosing faults in a power inverter including a power loss estimating module configured to calculate a power loss of one or more components of the power inverter. A junction temperature estimating module is configured to output an estimated junction temperature of the one or more components of the power inverter. A plurality of temperature sensors is configured to sense a plurality of temperatures of a plurality of inverter legs, respectively. A health indicator generating module is configured to generate a plurality of health indicators in response to the estimated junction temperature and the plurality of sensed temperatures of the plurality of inverter legs. A fault identification module is configured to selectively identify one of an inverter fault, a temperature sensor fault, and no fault in response to the plurality of health indicators.

公开(公告)号：US20230208281A1

公开(公告)日：2023-06-29

申请号：US17562504

申请日：2021-12-27

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jiyu ZHANG ,  Nomar S. GONZALEZ SANTINI

IPC: H02M1/32 ,  H02P27/08 ,  H02M7/537

CPC classification number: H02M1/327 ,  H02P27/085 ,  H02M7/537

Abstract: A diagnostic system for an inverter module includes a motor control module configured to determine operating characteristics of the inverter module. The operating characteristics include of at least one of a voltage, a current, and a switching frequency associated with operation of the inverter module. A diagnostic module is configured to receive the operating characteristics of the inverter module, estimate at least one junction temperature of a component of the inverter module based on the operating characteristics, calculate a health indicator of the inverter module based on the estimated junction temperature, and selectively output an alert based on the calculated health indicator.

公开(公告)号：US20210175835A1

公开(公告)日：2021-06-10

申请号：US16702877

申请日：2019-12-04

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jiyu ZHANG ,  Siddharth BALLAL ,  Lei HAO ,  Wesley G. ZANARDELLI ,  Bojian CAO ,  Mutasim SALMAN

IPC: H02P29/028 ,  H02P29/024 ,  B60W10/08

Abstract: An electric drive system of a vehicle comprises a motor, a position sensor, an inverter, sensors to sense current and voltage supplied to the motor, and a controller to control the motor by controlling the inverter based on data from the position sensor and the sensors and a torque command. The controller estimates a motor torque using a motor model, calculates the motor torque, and generates a first state of health for the electric drive system based on a difference between the estimated and calculated motor torques. The controller generates, in response to the first state of health being less than or equal to a first threshold, a second state of health for at least one of the position sensor, the sensors, and the motor, and determines whether one of the position sensor, the sensors, and the motor is faulty based on the first and second states of health.

公开(公告)号：US20210175826A1

公开(公告)日：2021-06-10

申请号：US16705534

申请日：2019-12-06

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jiyu ZHANG ,  Lei HAO

IPC: H02P21/16 ,  H02P21/20 ,  H02P21/22

Abstract: A control system for an electric motor includes a power input calculating module configured to calculate power input to the electric motor. A power output calculating module is configured to calculate power output by the electric motor. A power loss calculating module is configured to calculate power loss in the electric motor based on the power input and the power output. A fault module is configured to compare the power loss in the electric motor to one or more predetermined power loss thresholds and to selectively alter operation of the electric motor based on the comparison.