Blower motor for hvac systems

The blower motor assembly as set forth in claim 1, the power input connector comprising first and second power inputs, the sensing circuit including:

• a current transformer for sensing current in the first or second inputs,
• a transistor coupled with the current transformer for amplifying an output of the current transformer, and
• a capacitor coupled between the transistor and an input of the motor controller for providing a signal to the motor controller.

The blower motor assembly as set forth in claim 1, further comprising a rectifier coupled between the power input and the motor controller for converting the AC power to DC power and delivering the DC power to the motor controller.

The blower motor assembly as set forth in claim 1, wherein the variable speed motor is a brushless permanent magnet motor.

The blower motor assembly as set forth in claim 1, wherein the operating parameter is a speed of the motor.

A blower motor assembly comprising:

• a variable speed motor and motor controller at least partially housed within an enclosure;
• a power input connector electrically coupled with the motor controller and mounted within an opening of the enclosure for receiving AC power from an AC power source, the power input connector including at least five inputs;
• a plurality of sensing circuits adapted for sensing which of at least one of the power inputs power is applied to and for delivering corresponding signals to the motor controller for selecting a corresponding operating speed for the motor, the sensing circuits being positioned on the power input connector so as to minimize wiring within the enclosure.