System and method for optimizing motor performance by varying flux
AssigneeRT Patent Company, Inc.
InventorGeorge Holling
Life of this patent
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Abstract
A system for operating an electric motor is described. The system has a torque estimator to determine a load on the motor and a controller configured to generate a motor control signal. The controller continuously adjusts the motor control signal in response to the load on the motor. The motor control signal optimizes the motor's performance by controlling the rotor flux of the motor. The motor control signal can control the voltage or current and frequency applied to the motor.
Claims20
A system for operating an electric motor, the system comprising:
- a torque estimator to determine a load on the motor;
- and
- a controller in communication with the torque estimator and the motor, the controller configured to generate a motor control signal to the motor that continuously optimizes the motor performance by continuously varying motor flux in response to the load of the motor.
A method of controlling an electric motor, the method comprising the steps of:
- estimating a load on the motor;
- and
- generating a motor control signal to the motor that continuously optimizes motor performance by varying flux in the motor in response to the load on the motor.
A method of controlling an electric motor comprising the step of briefly applying a high voltage to the motor thereby inducing a high rate of change in a rotor current to instantaneously change the motor's excitation for improved dynamic response.
A method of controlling an electric motor comprising the step of injecting a high current into a stator of the motor to induce a rapid change in a magnetic field of the rotor for improved dynamic response.
Dependencies are inferred from the claim text.