Method for operating a motor control unit for a drive system

A device or arithmetic unit for monitoring the functions of a control unit for a drive system having a drive motor, comprising:

• an error response device for generating an alternative control variable as a function of a predefined monitoring torque;
• a back-calculation device for ascertaining a back-calculated torque from a control variable read back from the output stage;
• a comparator for comparing the back-calculated torque with the predefined monitoring torque;
• and
• an interface device which is configured to supply a provided control variable or an alternative control variable directly to the output stage as a function of a result of the comparison between the back-calculated torque and the predefined monitoring torque.

A drive system, comprising:

• a drive motor;
• an output stage for operating the drive motor according to one control variable or multiple control variables;
• a control unit for ascertaining the one control variable or multiple control variables from one state variable or multiple state variables of the drive system and a default variable for provision to an output stage for operating the drive motor;
• and
• a device for monitoring the functions of a control unit for a drive system having a drive motor, including:
• an error response device for generating an alternative control variable as a function of a predefined monitoring torque;
• a back-calculation device for ascertaining a back-calculated torque from a control variable read back from the output stage;
• a comparator for comparing the back-calculated torque with the predefined monitoring torque;
• and
• an interface device which is configured to supply a provided control variable or an alternative control variable directly to the output stage as a function of a result of the comparison between the back-calculated torque and the predefined monitoring torque.

A non-transitory computer readable medium having a computer program, which is executable by a processor, comprising:

• a program code arrangement having program code for operating a drive motor of a drive system, by performing the following:
• providing a control variable, which is ascertained as a function of one state variable or multiple state variables of the drive system and as a function of a default variable, to an output stage for operating the drive motor;
• reading the control variable previously provided to the output stage back from the output stage to obtain a read-back control variable;
• ascertaining a back-calculated torque from the read-back control variable;
• comparing the back-calculated torque and a predefined monitoring torque;
• and
• providing the control variable or an alternative control variable ascertained from the monitoring torque to the output stage as a function of a result of the comparison for the purpose of operating the drive motor.

A non-transitory computer readable medium having a computer program, which is executable by a device, comprising:

• a program code arrangement having program code for operating a drive motor of a drive system, by performing the following:
• providing a control variable, which is ascertained as a function of one state variable or multiple state variables of the drive system and as a function of a default variable, to an output stage for operating the drive motor;
• reading the control variable previously provided to the output stage back from the output stage to obtain a read-back control variable;
• ascertaining a back-calculated torque from the read-back control variable;
• comparing the back-calculated torque and a predefined monitoring torque;
• and
• providing the control variable or an alternative control variable ascertained from the monitoring torque to the output stage as a function of a result of the comparison for the purpose of operating the drive motor;
• wherein the device is for monitoring the functions of a control unit for a drive system having a drive motor, including:
• an error response device for generating an alternative control variable as a function of a predefined monitoring torque;
• a back-calculation device for ascertaining a back-calculated torque from a control variable read back from the output stage;
• a comparator for comparing the back-calculated torque with the predefined monitoring torque;
• and
• an interface device which is configured to supply a provided control variable or an alternative control variable directly to the output stage as a function of a result of the comparison between the back-calculated torque and the predefined monitoring torque.