Controlling Operation of Dishwasher Motor

1 . A method of controlling operation of a dishwashing appliance, the method comprising:

receiving data indicative of a supply voltage associated with a dishwashing appliance;

comparing the supply voltage to a nominal supply voltage associated with the dishwashing appliance;

determining one or more voltage control parameters based at least in part on the comparison of the supply voltage to the nominal supply voltage; and

adjusting a speed of a motor associated with the dishwashing appliance based at least in part on the voltage control parameters.

2 . The method of claim 1 , wherein determining one or more voltage control parameters comprises determining one or more firing angles associated with a triac device, the triac device configured to regulate an amount of voltage provided to the motor.

3 . The method of claim 2 , wherein the one or more voltage control parameters correspond to a chopped voltage waveform.

4 . The method of claim 2 , wherein determining one or more firing angles comprises determining one or more firing angle adjustments for the triac device to compensate for a difference between the supply voltage and the nominal supply voltage.

5 . The method of claim 2 , wherein adjusting a speed of a motor associated with the dishwashing appliance comprises controlling operation of the triac device in accordance with the one or more determined firing angles.

6 . The method of claim 1 , wherein adjusting a speed of a motor associated with the dishwashing appliance comprises adjusting the speed of the motor to substantially achieve a nominal motor speed.

7 . The method of claim 1 , further comprising comparing the supply voltage to a nominal supply voltage range.

8 . The method of claim 7 , further comprising, when the supply voltage falls outside of the nominal supply voltage range, ceasing operation of the dishwashing appliance.

9 . The method of claim 1 , further comprising:

receiving an input from a user indicative of a request to initiate a dishwashing cycle; and

initiating the dishwashing cycle based at least in part on the input from the user.

10 . The method of claim 9 , wherein receiving data indicative of a supply voltage comprises receiving data indicative of the supply voltage prior to initiation of the dishwashing cycle.

11 . The method of claim 9 , wherein receiving data indicative of a supply voltage comprises receiving data indicative of the supply voltage during the dishwashing cycle.

12 . The method of claim 9 , wherein initiating the dishwashing cycle comprises gradually increasing a voltage supplied to the motor from a first motor voltage to a second motor voltage.

13 . The method of claim 1 , wherein determining one or more voltage control parameters comprises accessing a lookup table stored in a memory associated with motor speeds of the dishwashing appliance.

14 . A dishwashing appliance comprising:

a tub that defines a wash chamber for receipt of articles for washing;

a pump motor configured to direct a flow of fluid within the dishwashing appliance;

a power source coupled to the pump motor, the power source configured to provide an alternating current signal to the pump motor; and

one or more control devices configured to control operation of the pump motor by:

receiving data indicative of a supply voltage associated with the power source;

comparing the supply voltage to a nominal supply voltage associated with the dishwashing appliance;

determining one or more voltage control parameters based at least in part on the comparison of the supply voltage to the nominal supply voltage; and

adjusting a speed of the pump motor based at least in part on the voltage control parameters.

15 . The dishwashing appliance of claim 14 , wherein determining one or more voltage control parameters comprises determining one or more firing angles associated with a triac device, the triac device configured to regulate an amount of voltage provided to the motor.

16 . The dishwashing appliance of claim 15 , wherein the one or more firing angles are determined based at least in part on the nominal supply voltage.

17 . The dishwashing appliance of claim 15 , wherein adjusting a speed of the pump motor comprises controlling operation of the triac device in accordance with the one or more determined firing angles to substantially achieve a nominal motor speed.

18 . A control system for a dishwashing appliance, the control system comprising one or more control devices configured to:

receive data indicative of a supply voltage associated with a dishwashing appliance, the dishwashing appliance comprising a tub that defines a wash chamber for receipt of articles for washing, a pump motor configured to direct a flow of fluid within the dishwashing appliance, and a power source coupled to the pump motor, the power source configured to provide an alternating current signal to the pump motor;

compare the supply voltage to a nominal supply voltage associated with the power source;

determine one or more voltage control parameters based at least in part on the comparison of the supply voltage to the nominal supply voltage; and

adjust a speed of the pump motor based at least in part on the voltage control parameters to substantially achieve a nominal motor speed.

19 . The control system of claim 18 , wherein determining one or more voltage control parameters comprises determining one or more firing angles associated with a triac device, the triac device configured to regulate an amount of voltage provided to the motor.

20 . The control system of claim 19 , wherein determining one or more firing angles comprises determining one or more firing angle adjustments for the triac device to compensate for a difference between the supply voltage and the nominal supply voltage.