Methods and systems for automatic rotation direction determination of electronically commutated motor

摘要

A method for determining a direction of rotation for an electronically commutated motor (ECM) is described. The motor is configured to rotate a blower and the method comprises rotating the blower using the ECM and determining if the resulting blower rotation is indicative of the desired direction of rotation for the blower.

主权项

1. A motor controller configured to control an electric motor, said electric motor configured to rotate a blower, said motor controller further configured to:
cause the electric motor to rotate the blower in a first direction at a predefined speed of rotation during an initial power up of the electric motor; determine a first amount of electric motor torque to rotate the blower in the first direction at the predefined speed of rotation; rotate the blower in a second direction, opposite the first direction, at the predefined speed of rotation; determine a second amount of electric motor torque to rotate the blower in the second direction at the predefined speed of rotation; and determine whether the first amount of electric motor torque corresponds to a predefined direction of rotation of the blower.