Patent ID: 7573217
Filing Date: 2009-08-11
Classification: H02P

Abstract:
1. A control system configured to control operation of an electronically commutated motor (ECM) attached to a blower, said control system comprising: a motor controller configured to control a direction of rotation of the ECM and further configured to cause the ECM to rotate at one of a selected level of torque and a predefined speed; and a system controller configured to receive data relating to the amount of torque applied to the ECM and a speed of rotation of the ECM and the blower, said system controller further configured to determine if a direction of rotation of the ECM is the same as the desired direction of rotation for the blower by determining if the measured speed of rotation of the blower is consistent with the amount of torque applied to the ECM and configure said motor controller to change the direction of rotation of the ECM if the determination is negative.