Abstract: Systems and methods for detecting a current measurement gain error in a current measurement system is disclosed. The method includes reading an output voltage signal, extracting a signature of a current measurement gain error from the output voltage signal, detecting an existence of the current measurement gain error based on the signature, and responsive to detecting the existence of the current measurement gain error, identifying a diagnostic voltage phase in which the current measurement gain error exists.

Abstract: A method of controlling a motor that generates an output current from an input voltage command. The method receives, from the motor, the output current that includes a direct-axis portion and a quadrature-axis portion, the output current being received as feedback current. The method determines a compensated voltage command by applying, to the feedback current, first gain factors and an inverse of second gain factors. The first gain factors decouple the d-axis portion and the q-axis portion of the compensated voltage command. The inverse of the second gain factors allow the compensated voltage command to be filtered in a manner that preserves decoupling between the d-axis and q-axis. The method determines the input voltage command for the motor by applying the second gain factors to the compensated voltage command to cause the motor to generate the output current with reduced influence of variations of operating parameters of the motor.

Abstract: Systems and methods for detecting a current measurement gain error in a current measurement system is disclosed. The method includes reading an output voltage signal, extracting a signature of a current measurement gain error from the output voltage signal, detecting an existence of the current measurement gain error based on the signature, and responsive to detecting the existence of the current measurement gain error, identifying a diagnostic voltage phase in which the current measurement gain error exists.

Abstract: According to one or more embodiments, an example system includes a motor, and a motor control system that includes a low side current measurement subsystem. The system further includes a processor that switches the motor control system to use feedforward current control in response to detecting a current measurement failure in the low side current measurement subsystem. The processor further identifies a first phase that has a failed current measurement. The processor also computes a current measurement for the first phase, which has the current measurement failure. The processor further uses the computed current measurement to compute a parameter estimate.

Abstract: Technical solutions are described for a motor control system to control a permanent magnet DC (PMDC) machine. An example motor control system includes one or more sensors for measuring an output current of the PMDC machine. The motor control system further includes a current regulator that generates a voltage command corresponding to an input current command for generating an amount of torque using the PMDC machine. The current regulator includes a current command compensator that generates a first voltage command based on the input current command received by the current regulator. The current regulator further includes a feedback compensator that generates a second voltage command based on the output current measured by the one or more sensors. The current regulator also includes an adder configured that generates the voltage command by adding the first voltage command and the second voltage command.

Abstract: According to one or more embodiments, an example system includes a motor, and a motor control system that includes a low side current measurement subsystem. The system further includes a processor that switches the motor control system to use feedforward current control in response to detecting a current measurement failure in the low side current measurement subsystem. The processor further identifies a first phase that has a failed current measurement. The processor also computes a current measurement for the first phase, which has the current measurement failure. The processor further uses the computed current measurement to compute a parameter estimate.

Abstract: Technical solutions are described for a motor control system to control a permanent magnet DC (PMDC) machine. An example motor control system includes one or more sensors for measuring an output current of the PMDC machine. The motor control system further includes a current regulator that generates a voltage command corresponding to an input current command for generating an amount of torque using the PMDC machine. The current regulator includes a current command compensator that generates a first voltage command based on the input current command received by the current regulator. The current regulator further includes a feedback compensator that generates a second voltage command based on the output current measured by the one or more sensors. The current regulator also includes an adder configured that generates the voltage command by adding the first voltage command and the second voltage command.

Abstract: Technical solutions are described for determining a sensor failure in a motor control system with at least three phase current measurements. An example system includes a current controller to generate an input voltage command for a motor using feedforward control. The system further includes a failed sensor identification module that, in response to the current controller operating using the feedforward control, determines that a current offset error is indicative of a failure of a current sensor, the current offset error determined based on a magnitude and a phase of a diagnostic current. Further, the failed sensor identification module identifies the current sensor experiencing the failure based on a phase value of the diagnostic current in response to the failure.

Abstract: Technical solutions are described for a motor control system of a motor to compute a disturbance estimate and use the disturbance estimate to improve the performance of the motor control system. For example, the motor control system includes an observer module that receives an input voltage signal of the motor. The motor control system also receives an output current signal from the motor. The motor control system further computes the disturbance estimate of the motor control system based on a plant model of an electrical subsystem of the motor control system.

Abstract: Technical solutions are described for providing torque ripple compensation when a motor control system is operating in feedforward mode. An example motor control system includes a feedforward controller that receives a first current command corresponding to an input torque command, and receives a second current command corresponding to a torque ripple. The feedforward controller generates a voltage command based on the first current command and the second current command, the voltage command being applied to a motor.

Abstract: Technical solutions are described for providing torque ripple compensation when a motor control system is operating in feedforward mode. An example motor control system includes a feedforward controller that receives a first current command corresponding to an input torque command, and receives a second current command corresponding to a torque ripple. The feedforward controller generates a voltage command based on the first current command and the second current command, the voltage command being applied to a motor.

Abstract: Technical solutions are described for determining a sensor failure in a motor control system with at least three phase current measurements. An example system includes a current controller to generate an input voltage command for a motor using feedforward control. The system further includes a failed sensor identification module that, in response to the current controller operating using the feedforward control, determines that a current offset error is indicative of a failure of a current sensor, the current offset error determined based on a magnitude and a phase of a diagnostic current. Further, the failed sensor identification module identifies the current sensor experiencing the failure based on a phase value of the diagnostic current in response to the failure.

Abstract: Technical solutions are described for a motor control system of a motor to compute a disturbance estimate and use the disturbance estimate to improve the performance of the motor control system. For example, the motor control system includes an observer module that receives an input voltage signal of the motor. The motor control system also receives an output current signal from the motor. The motor control system further computes the disturbance estimate of the motor control system based on a plant model of an electrical subsystem of the motor control system.