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Method and Means for Controlling Power Delivery to an Equipment for Counter-Acting Formation of Ice or for Removing Snow/Ice on a Constructional Element

  • US 20100224621A1
  • Filed: 05/07/2007
  • Published: 09/09/2010
  • Est. Priority Date: 05/08/2006
  • Status: Abandoned Application
First Claim
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1. A method for controlling the supply of electrical power by way of high frequency alternating current from an equipment (11) for supplying power to a heat emission equipment (3) for preventing the formation of ice or for removing ice or snow from a constructional element (1), wherein the control is effected using a controller (13) based on input data representing physical parameter values as measured by sensors (4, 14, 15, 17, 18, 19) arranged at or nearby the constructional elements (1), as well as based on stored, historical data relating to snow and ice conditions for the constructional element (1), providing an adaptive manner of control, characterized in thatcurrent input data relating to the value of the effective surface temperature of the constructional element (1) and to values of the following parameters:

  • the amount of snow/ice on the constructional element (1), air temperature, wind velocity, precipitation, velocity of the constructional element (1), and vibrations of the constructional element (1), is compared, in the controller (13), to stored data relating to historical values of the same parameters, recorded as a function of time, andusing stored algorithms, the controller (13) calculates, based on said relevant input and historical data, whether delivery of power is required, and in that case also the amperage and frequency values necessary to remove snow/ice from the constructional element (1), the frequency affecting a time constant of change in the surface temperature of the constructional element (1),according to the result of the calculation, the controller (13) then issues a start or stop signal as well as an output control signal including amperage and frequency values to the power supply equipment (11), andthe controller (13) updates its historical data with new parameter value data resulting from a current condition of snow/ice on the constructional element (1) according to a predetermined procedure.

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