Control Loop Performance Monitoring In Variable Frequency Drive

A system comprising at least a sensor device, a variable frequency drive, and a motor;

• wherein the sensor device is configured to:
• measure a value of a process variable associated with a physical process;
• and
• transmit the value of the process variable to the variable frequency drive;
• wherein the variable frequency drive is configured to:
• receive the value of the process variable from the sensor device;
• input a set of data to one or more control loop performance monitoring algorithms comprised in the variable frequency drive, wherein the set of data comprises at least the value of the process variable, a target value for the process variable, a set of controller input parameters, and a controller output;
• obtain an output from each of the one or more control loop performance monitoring algorithms based at least partly on the set of data;
• determine one or more key performance indicator values based at least partly on the output from each of the one or more control loop performance monitoring algorithms, wherein the one or more key performance indicator values are indicative of control loop performance;
• and
• adjust the controller output by adjusting the set of controller input parameters based at least partly on the one or more key performance indicator values;
• wherein the motor is configured to:
• adjust the physical process via an actuator based at least partly on the controller output adjusted by the variable frequency drive.

A method comprising:

• inputting, by a variable frequency drive, a set of data to one or more control loop performance monitoring algorithms comprised in the variable frequency drive, wherein the set of data comprises at least a measured value of a process variable, a target value for the process variable, a set of controller input parameters, and a controller output;
• obtaining, by the variable frequency drive, an output from each of the one or more control loop performance monitoring algorithms based at least partly on the set of data;
• determining, by the variable frequency drive, one or more key performance indicator values based at least partly on the output from each of the one or more control loop performance monitoring algorithms, wherein the one or more key performance indicator values are indicative of control loop performance;
• and
• adjusting, by the variable frequency drive, the set of controller input parameters based at least partly on the one or more key performance indicator values.

A non-transitory computer readable medium comprising instructions which, when executed by one or more processors comprised in a variable frequency drive, cause the variable frequency drive to perform at least the following:

• input a set of data to one or more control loop performance monitoring algorithms comprised in the variable frequency drive, wherein the set of data comprises at least a measured value of a process variable, a target value for the process variable, a set of controller input parameters, and a controller output;
• obtain an output from each of the one or more control loop performance monitoring algorithms based at least partly on the set of data;
• determine one or more key performance indicator values based at least partly on the output from each of the one or more control loop performance monitoring algorithms, wherein the one or more key performance indicator values are indicative of control loop performance;
• and
• adjust the set of controller input parameters based at least partly on the one or more key performance indicator values.