System and method for optimizing flux regulation in electric motors

A computer-implemented method for improving the functioning of a computer for optimizing a flux level in an electric motor configured to drive a load, the computer-implemented method comprising:

• using a set of motor parameters and a set of motor equations to estimate a slip, a stator frequency, and a torque, and defining an optimal flux operating range for a given speed and torque of the electric motor;
• determining a linear flux gain within the optimal flux operating range at a plurality of different speeds of the electric motor;
• saving in an electronic memory element of the computer the linear flux gain for each different speed;
• and
• determining in an electronic control element of the computer an optimal flux level for the electric motor by—
• accessing the memory element to identify a specific linear flux gain which corresponds to an actual speed of the electric motor,
• multiplying the specific linear flux gain by the estimated torque and adding an offset value to determine a phase current component value associated with the optimal flux level, and
• applying the determined phase current component value to the electric motor.

A computer-implemented method improving the functioning of a computer for optimizing a flux level in an electric motor, wherein the electric motor is a variable speed, alternating current induction motor configured to drive a load, the computer-implemented method comprising:

• using a set of motor parameters and a set of motor equations to estimate a slip, a stator frequency, and a torque, and defining an optimal flux operating range for a given speed and torque of the electric motor;
• determining a linear flux gain within the optimal flux operating range at a plurality of different speeds of the electric motor;
• saving in an electronic memory element of the computer the linear flux gain for each different speed;
• and
• determining in an electronic control element of the computer an optimal flux level for the electric motor by—
• accessing the memory element to identify a specific linear flux gain which corresponds to an actual speed of the electric motor,
• multiplying the specific linear flux gain by the estimated torque and adding an offset value to determine a phase current component value associated with the optimal flux level, wherein the offset value is a common offset value for the plurality of different speeds and is based on the phase current at a lowest torque point, and
• applying the determined phase current component value to the electric motor.