Motor control system providing single output signal and high number of speed settings

A control system for controlling operation of an electric blower motor, the control system providing at least seventeen speed settings for a speed of the electric blower motor, wherein the at least seventeen speed settings are achieved using a standard five pin speed connector including first, second, third, fourth, and fifth pins to communicate via electrical signals with the electric blower motor, the control system comprising:

• one speed monitoring output pin of the five pins on the standard five pin speed connector transmitting an output signal for monitoring the speed of the electric blower motor;
• and
• first, second, third, and fourth speed setting input pins of the five pins on the standard five speed pin connector receiving input signals for setting the speed of the electric blower motor,
• wherein at least one of the four speed setting input pins receives and decodes two binary states and two frequency states, and the two frequency states are sixty Hertz and one hundred twenty Hertz.

A control system for controlling operation of an electric blower motor, the control system configured to provide at least seventeen speed settings for a speed of the electric blower motor, wherein the at least seventeen speed settings are achieved using a standard five pin speed connector including first, second, third, fourth, and fifth pins to communicate via electrical signals with the electric blower motor, the control system comprising:

• one speed monitoring output pin of the five pins on the standard five pin speed connector transmitting an output signal for monitoring the speed of the electric blower motor;
• and
• first, second, third, and fourth speed setting input pins of the five pins on the standard five speed pin connector receiving input signals for setting the speed of the electric blower motor,
• wherein at least one of the four speed setting input pins receives and decodes two binary states and two frequency states, and
• wherein a transmit circuitry on the fourth pin is eliminated to make the fourth pin an open collector, and a direct current bias network on the fifth pin is eliminated, and the fifth pin is the fourth speed setting input pin.