Pmsm flux weakening for appliance motors

A motor system comprising:

• a motor having a rotor and a stator;
• and
• a controller configured to control the motor, the controller configured to perform operations for controlling the motor, the operations comprising:
• receiving a d-axis current error signal and a q-axis current error signal;
• determining a d-axis voltage component signal based, at least in part, on the q-axis current error signal, the d-axis voltage component signal being limited by a first voltage threshold;
• then determining a q-axis voltage component signal based, at least in part, on the d-axis current error signal, the q-axis voltage component signal being limited by a second voltage threshold that is less than the first voltage threshold;
• and
• controlling the motor using a field-oriented control scheme based, at least in part, on the d-axis voltage component signal and the q-axis voltage component signal.

A motorized appliance, comprising:

• at least one motorized component;
• and
• a motor system configured to drive the at least one motorized component;
• wherein the motor system comprises:
• a motor having a rotor and a stator;
• and
• a controller configured to control the motor, the controller configured to perform operations for controlling the motor, the operations comprising:
• receiving a d-axis current error signal and a q-axis current error signal;
• determining a d-axis voltage component signal based, at least in part, on the q-axis current error signal, the d-axis voltage component signal being limited by a first voltage threshold;
• then determining a q-axis voltage component signal based, at least in part, on the d-axis current error signal, the q-axis voltage component signal being limited by a second voltage threshold that is less than the first voltage threshold;
• and
• controlling the motor based, at least in part, on the d-axis voltage component signal and the q-axis voltage component signal using a field-oriented control scheme.