Patent ID: 7922120
Filing Date: 2011-04-12
Classification: B64D

Abstract:
1. A heating arrangement method for a plurality of heater elements, the heater elements arranged in a grid along the surface of an airfoil with an airflow flowing across the airfoil, the grid having zones of heater elements extending along the surface perpendicular to the airflow, the grid further having sections of heater elements extending along the surface parallel to the airflow, the plurality of heater elements powered by a multiphase power source with three phases of power, the method comprising for any three consecutive heater elements within a zone, assigning each heater element to a different power phase of the three phase power, for all zones in the grid; and for any three consecutive heater elements within a section, assigning each heater element to a different power phase of the three phase power, for all sections in the grid.