Tapped auxiliary winding dishwasher motor

A multi-speed motor assembly for a dishwasher, the motor assembly comprising:

• a permanent split capacitor motor comprising—
• a stator;
• a rotor rotatably positioned within the stator;
• a main winding coupled with the stator;
• a first auxiliary winding coupled with the stator, the first auxiliary winding formed from a wire having a number of turns;
• a second auxiliary winding coupled with the stator, the second auxiliary winding formed from a wire having a number of turns less than the number of turns in the first auxiliary winding;
• a capacitor in series with the first and second auxiliary windings;
• a first tap point between the main winding and the first auxiliary winding;
• a second tap point between the first and second auxiliary windings;
• and
• a motor controller for controlling operation of the motor and for selectively energizing the first and second taps to provide multi-speed operation of the motor, the motor controller configured to—
• energize the first tap point so that the first and second auxiliary windings are in series with the capacitor and the first and second auxiliary windings and the capacitor are in parallel with the main winding to provide a relatively higher motor speed;
• and
• energize the second tap point so that only the second auxiliary winding is in series with the capacitor and the second auxiliary winding and the capacitor are in parallel with the main winding to provide a relatively lower motor speed.

A dishwasher comprising:

• a housing;
• one or more racks positioned in the housing;
• one or more spray arms for spraying water on the racks;
• a pump for pumping water to the spray arms;
• a permanent split capacitor motor for driving the pump, the motor comprising—
• a stator;
• a rotor rotatably positioned within the stator;
• a main winding coupled with the stator;
• a first auxiliary winding coupled with the stator, the first auxiliary winding formed from a wire having a number of turns;
• a second auxiliary winding coupled with the stator, the second auxiliary winding formed from a wire having a number of turns less than the number of turns in the first auxiliary winding;
• a capacitor in series with the first and second auxiliary windings;
• a first tap point between the main winding and the first auxiliary winding;
• a second tap point between the first and second auxiliary windings;
• and
• a motor controller for controlling operation of the motor and for selectively energizing the first and second taps to provide multi-speed operation of the motor, the motor controller comprising—
• a first relay to energize the first tap point so that the first and second auxiliary windings are in series with the capacitor and the first and second auxiliary windings and the capacitor are in parallel with the main winding to provide a relatively higher motor speed;
• and
• a second relay to energize the second tap point so that only the second auxiliary winding is in series with the capacitor and the second auxiliary winding and the capacitor are in parallel with the main winding to provide a relatively lower motor speed.